dnl dnl %CopyrightBegin% dnl dnl Copyright Ericsson AB 1998-2016. All Rights Reserved. dnl dnl Licensed under the Apache License, Version 2.0 (the "License"); dnl you may not use this file except in compliance with the License. dnl You may obtain a copy of the License at dnl dnl http://www.apache.org/licenses/LICENSE-2.0 dnl dnl Unless required by applicable law or agreed to in writing, software dnl distributed under the License is distributed on an "AS IS" BASIS, dnl WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. dnl See the License for the specific language governing permissions and dnl limitations under the License. dnl dnl %CopyrightEnd% dnl dnl dnl aclocal.m4 dnl dnl Local macros used in configure.in. The Local Macros which dnl could/should be part of autoconf are prefixed LM_, macros specific dnl to the Erlang system are prefixed ERL_. dnl AC_DEFUN(LM_PRECIOUS_VARS, [ dnl ERL_TOP AC_ARG_VAR(ERL_TOP, [Erlang/OTP top source directory]) dnl Tools AC_ARG_VAR(CC, [C compiler]) AC_ARG_VAR(CFLAGS, [C compiler flags]) AC_ARG_VAR(STATIC_CFLAGS, [C compiler static flags]) AC_ARG_VAR(CFLAG_RUNTIME_LIBRARY_PATH, [runtime library path linker flag passed via C compiler]) AC_ARG_VAR(CPP, [C/C++ preprocessor]) AC_ARG_VAR(CPPFLAGS, [C/C++ preprocessor flags]) AC_ARG_VAR(CXX, [C++ compiler]) AC_ARG_VAR(CXXFLAGS, [C++ compiler flags]) AC_ARG_VAR(LD, [linker (is often overridden by configure)]) AC_ARG_VAR(LDFLAGS, [linker flags (can be risky to set since LD may be overriden by configure)]) AC_ARG_VAR(LIBS, [libraries]) AC_ARG_VAR(DED_LD, [linker for Dynamic Erlang Drivers (set all DED_LD* variables or none)]) AC_ARG_VAR(DED_LDFLAGS, [linker flags for Dynamic Erlang Drivers (set all DED_LD* variables or none)]) AC_ARG_VAR(DED_LD_FLAG_RUNTIME_LIBRARY_PATH, [runtime library path linker flag for Dynamic Erlang Drivers (set all DED_LD* variables or none)]) AC_ARG_VAR(LFS_CFLAGS, [large file support C compiler flags (set all LFS_* variables or none)]) AC_ARG_VAR(LFS_LDFLAGS, [large file support linker flags (set all LFS_* variables or none)]) AC_ARG_VAR(LFS_LIBS, [large file support libraries (set all LFS_* variables or none)]) AC_ARG_VAR(RANLIB, [ranlib]) AC_ARG_VAR(AR, [ar]) AC_ARG_VAR(GETCONF, [getconf]) dnl Cross system root AC_ARG_VAR(erl_xcomp_sysroot, [Absolute cross system root path (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_isysroot, [Absolute cross system root include path (only used when cross compiling)]) dnl Cross compilation variables AC_ARG_VAR(erl_xcomp_bigendian, [big endian system: yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_double_middle_endian, [double-middle-endian system: yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_linux_nptl, [have Native POSIX Thread Library: yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_linux_usable_sigusrx, [SIGUSR1 and SIGUSR2 can be used: yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_linux_usable_sigaltstack, [have working sigaltstack(): yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_poll, [have working poll(): yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_kqueue, [have working kqueue(): yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_putenv_copy, [putenv() stores key-value copy: yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_reliable_fpe, [have reliable floating point exceptions: yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_getaddrinfo, [have working getaddrinfo() for both IPv4 and IPv6: yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_gethrvtime_procfs_ioctl, [have working gethrvtime() which can be used with procfs ioctl(): yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_clock_gettime_cpu_time, [clock_gettime() can be used for retrieving process CPU time: yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_after_morecore_hook, [__after_morecore_hook can track malloc()s core memory usage: yes|no (only used when cross compiling)]) AC_ARG_VAR(erl_xcomp_dlsym_brk_wrappers, [dlsym(RTLD_NEXT, _) brk wrappers can track malloc()s core memory usage: yes|no (only used when cross compiling)]) ]) AC_DEFUN(ERL_XCOMP_SYSROOT_INIT, [ erl_xcomp_without_sysroot=no if test "$cross_compiling" = "yes"; then test "$erl_xcomp_sysroot" != "" || erl_xcomp_without_sysroot=yes test "$erl_xcomp_isysroot" != "" || erl_xcomp_isysroot="$erl_xcomp_sysroot" else erl_xcomp_sysroot= erl_xcomp_isysroot= fi ]) AC_DEFUN(LM_CHECK_GETCONF, [ if test "$cross_compiling" != "yes"; then AC_CHECK_PROG([GETCONF], [getconf], [getconf], [false]) else dnl First check if we got a `<HOST>-getconf' in $PATH host_getconf="$host_alias-getconf" AC_CHECK_PROG([GETCONF], [$host_getconf], [$host_getconf], [false]) if test "$GETCONF" = "false" && test "$erl_xcomp_sysroot" != ""; then dnl We should perhaps give up if we have'nt found it by now, but at dnl least in one Tilera MDE `getconf' under sysroot is a bourne dnl shell script which we can use. We try to find `<HOST>-getconf' dnl or `getconf' under sysconf, but only under sysconf since dnl `getconf' in $PATH is almost guaranteed to be for the build dnl machine. GETCONF= prfx="$erl_xcomp_sysroot" AC_PATH_TOOL([GETCONF], [getconf], [false], ["$prfx/usr/bin:$prfx/bin:$prfx/usr/local/bin"]) fi fi ]) dnl ---------------------------------------------------------------------- dnl dnl LM_WINDOWS_ENVIRONMENT dnl dnl dnl Tries to determine thw windows build environment, i.e. dnl MIXED_CYGWIN_VC or MIXED_MSYS_VC dnl AC_DEFUN(LM_WINDOWS_ENVIRONMENT, [ MIXED_CYGWIN=no MIXED_MSYS=no AC_MSG_CHECKING(for mixed cygwin or msys and native VC++ environment) if test "X$host" = "Xwin32" -a "x$GCC" != "xyes"; then if test -x /usr/bin/msys-?.0.dll; then CFLAGS="-O2" MIXED_MSYS=yes AC_MSG_RESULT([MSYS and VC]) MIXED_MSYS_VC=yes CPPFLAGS="$CPPFLAGS -DERTS_MIXED_MSYS_VC" elif test -x /usr/bin/cygpath; then CFLAGS="-O2" MIXED_CYGWIN=yes AC_MSG_RESULT([Cygwin and VC]) MIXED_CYGWIN_VC=yes CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_VC" else AC_MSG_RESULT([undeterminable]) AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!) fi else AC_MSG_RESULT([no]) MIXED_CYGWIN_VC=no MIXED_MSYS_VC=no fi AC_SUBST(MIXED_CYGWIN_VC) AC_SUBST(MIXED_MSYS_VC) MIXED_VC=no if test "x$MIXED_MSYS_VC" = "xyes" -o "x$MIXED_CYGWIN_VC" = "xyes" ; then MIXED_VC=yes fi AC_SUBST(MIXED_VC) if test "x$MIXED_MSYS" != "xyes"; then AC_MSG_CHECKING(for mixed cygwin and native MinGW environment) if test "X$host" = "Xwin32" -a "x$GCC" = x"yes"; then if test -x /usr/bin/cygpath; then CFLAGS="-O2" MIXED_CYGWIN=yes AC_MSG_RESULT([yes]) MIXED_CYGWIN_MINGW=yes CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_MINGW" else AC_MSG_RESULT([undeterminable]) AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!) fi else AC_MSG_RESULT([no]) MIXED_CYGWIN_MINGW=no fi else MIXED_CYGWIN_MINGW=no fi AC_SUBST(MIXED_CYGWIN_MINGW) AC_MSG_CHECKING(if we mix cygwin with any native compiler) if test "X$MIXED_CYGWIN" = "Xyes"; then AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) fi AC_SUBST(MIXED_CYGWIN) AC_MSG_CHECKING(if we mix msys with another native compiler) if test "X$MIXED_MSYS" = "Xyes" ; then AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) fi AC_SUBST(MIXED_MSYS) ]) dnl ---------------------------------------------------------------------- dnl dnl LM_FIND_EMU_CC dnl dnl dnl Tries fairly hard to find a C compiler that can handle jump tables. dnl Defines the @EMU_CC@ variable for the makefiles and dnl inserts NO_JUMP_TABLE in the header if one cannot be found... dnl AC_DEFUN(LM_FIND_EMU_CC, [AC_CACHE_CHECK(for a compiler that handles jumptables, ac_cv_prog_emu_cc, [ AC_TRY_COMPILE([],[ #if defined(__clang_major__) && __clang_major__ >= 3 /* clang 3.x or later is fine */ #elif defined(__llvm__) #error "this version of llvm is unable to correctly compile beam_emu.c" #endif __label__ lbl1; __label__ lbl2; int x = magic(); static void *jtab[2]; jtab[0] = &&lbl1; jtab[1] = &&lbl2; goto *jtab[x]; lbl1: return 1; lbl2: return 2; ],ac_cv_prog_emu_cc="$CC",ac_cv_prog_emu_cc=no) if test "$ac_cv_prog_emu_cc" = no; then for ac_progname in emu_cc.sh gcc-4.2 gcc; do IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":" ac_dummy="$PATH" for ac_dir in $ac_dummy; do test -z "$ac_dir" && ac_dir=. if test -f "$ac_dir/$ac_progname"; then ac_cv_prog_emu_cc="$ac_dir/$ac_progname" break fi done IFS="$ac_save_ifs" if test "$ac_cv_prog_emu_cc" != no; then break fi done fi if test "$ac_cv_prog_emu_cc" != no; then save_CC="$CC" save_CFLAGS=$CFLAGS save_CPPFLAGS=$CPPFLAGS CC="$ac_cv_prog_emu_cc" CFLAGS="" CPPFLAGS="" AC_TRY_COMPILE([],[ #if defined(__clang_major__) && __clang_major__ >= 3 /* clang 3.x or later is fine */ #elif defined(__llvm__) #error "this version of llvm is unable to correctly compile beam_emu.c" #endif __label__ lbl1; __label__ lbl2; int x = magic(); static void *jtab[2]; jtab[0] = &&lbl1; jtab[1] = &&lbl2; goto *jtab[x]; lbl1: return 1; lbl2: return 2; ],ac_cv_prog_emu_cc="$CC",ac_cv_prog_emu_cc=no) CC=$save_CC CFLAGS=$save_CFLAGS CPPFLAGS=$save_CPPFLAGS fi ]) if test "$ac_cv_prog_emu_cc" = no; then AC_DEFINE(NO_JUMP_TABLE,[],[Defined if no found C compiler can handle jump tables]) EMU_CC="$CC" else EMU_CC="$ac_cv_prog_emu_cc" fi AC_SUBST(EMU_CC) ]) dnl ---------------------------------------------------------------------- dnl dnl LM_PROG_INSTALL_DIR dnl dnl This macro may be used by any OTP application. dnl dnl Figure out how to create directories with parents. dnl (In my opinion INSTALL_DIR is a bad name, MKSUBDIRS or something is better) dnl dnl We prefer 'install -d', but use 'mkdir -p' if it exists. dnl If none of these methods works, we give up. dnl AC_DEFUN(LM_PROG_INSTALL_DIR, [AC_CACHE_CHECK(how to create a directory including parents, ac_cv_prog_mkdir_p, [ temp_name_base=config.$$ temp_name=$temp_name_base/x/y/z $INSTALL -d $temp_name >/dev/null 2>&1 ac_cv_prog_mkdir_p=none if test -d $temp_name; then ac_cv_prog_mkdir_p="$INSTALL -d" else mkdir -p $temp_name >/dev/null 2>&1 if test -d $temp_name; then ac_cv_prog_mkdir_p="mkdir -p" fi fi rm -fr $temp_name_base ]) case "${ac_cv_prog_mkdir_p}" in none) AC_MSG_ERROR(don't know how create directories with parents) ;; *) INSTALL_DIR="$ac_cv_prog_mkdir_p" AC_SUBST(INSTALL_DIR) ;; esac ]) dnl ---------------------------------------------------------------------- dnl dnl LM_PROG_PERL5 dnl dnl Try to find perl version 5. If found set PERL to the absolute path dnl of the program, if not found set PERL to false. dnl dnl On some systems /usr/bin/perl is perl 4 and e.g. dnl /usr/local/bin/perl is perl 5. We try to handle this case by dnl putting a couple of dnl Tries to handle the case that there are two programs called perl dnl in the path and one of them is perl 5 and the other isn't. dnl AC_DEFUN(LM_PROG_PERL5, [AC_PATH_PROGS(PERL, perl5 perl, false, /usr/local/bin:/opt/local/bin:/usr/local/gnu/bin:${PATH}) changequote(, )dnl dnl[ That bracket is needed to balance the right bracket below if test "$PERL" = "false" || $PERL -e 'exit ($] >= 5)'; then changequote([, ])dnl ac_cv_path_PERL=false PERL=false dnl AC_MSG_WARN(perl version 5 not found) fi ])dnl dnl ---------------------------------------------------------------------- dnl dnl LM_DECL_SO_BSDCOMPAT dnl dnl Check if the system has the SO_BSDCOMPAT flag on sockets (linux) dnl AC_DEFUN(LM_DECL_SO_BSDCOMPAT, [AC_CACHE_CHECK([for SO_BSDCOMPAT declaration], ac_cv_decl_so_bsdcompat, AC_TRY_COMPILE([#include <sys/socket.h>], [int i = SO_BSDCOMPAT;], ac_cv_decl_so_bsdcompat=yes, ac_cv_decl_so_bsdcompat=no)) case "${ac_cv_decl_so_bsdcompat}" in "yes" ) AC_DEFINE(HAVE_SO_BSDCOMPAT,[], [Define if you have SO_BSDCOMPAT flag on sockets]) ;; * ) ;; esac ]) dnl ---------------------------------------------------------------------- dnl dnl LM_DECL_INADDR_LOOPBACK dnl dnl Try to find declaration of INADDR_LOOPBACK, if nowhere provide a default dnl AC_DEFUN(LM_DECL_INADDR_LOOPBACK, [AC_CACHE_CHECK([for INADDR_LOOPBACK in netinet/in.h], ac_cv_decl_inaddr_loopback, [AC_TRY_COMPILE([#include <sys/types.h> #include <netinet/in.h>], [int i = INADDR_LOOPBACK;], ac_cv_decl_inaddr_loopback=yes, ac_cv_decl_inaddr_loopback=no) ]) if test ${ac_cv_decl_inaddr_loopback} = no; then AC_CACHE_CHECK([for INADDR_LOOPBACK in rpc/types.h], ac_cv_decl_inaddr_loopback_rpc, AC_TRY_COMPILE([#include <rpc/types.h>], [int i = INADDR_LOOPBACK;], ac_cv_decl_inaddr_loopback_rpc=yes, ac_cv_decl_inaddr_loopback_rpc=no)) case "${ac_cv_decl_inaddr_loopback_rpc}" in "yes" ) AC_DEFINE(DEF_INADDR_LOOPBACK_IN_RPC_TYPES_H,[], [Define if you need to include rpc/types.h to get INADDR_LOOPBACK defined]) ;; * ) AC_CACHE_CHECK([for INADDR_LOOPBACK in winsock2.h], ac_cv_decl_inaddr_loopback_winsock2, AC_TRY_COMPILE([#define WIN32_LEAN_AND_MEAN #include <winsock2.h>], [int i = INADDR_LOOPBACK;], ac_cv_decl_inaddr_loopback_winsock2=yes, ac_cv_decl_inaddr_loopback_winsock2=no)) case "${ac_cv_decl_inaddr_loopback_winsock2}" in "yes" ) AC_DEFINE(DEF_INADDR_LOOPBACK_IN_WINSOCK2_H,[], [Define if you need to include winsock2.h to get INADDR_LOOPBACK defined]) ;; * ) # couldn't find it anywhere AC_DEFINE(HAVE_NO_INADDR_LOOPBACK,[], [Define if you don't have a definition of INADDR_LOOPBACK]) ;; esac;; esac fi ]) dnl ---------------------------------------------------------------------- dnl dnl LM_STRUCT_SOCKADDR_SA_LEN dnl dnl Check if the sockaddr structure has the field sa_len dnl AC_DEFUN(LM_STRUCT_SOCKADDR_SA_LEN, [AC_CACHE_CHECK([whether struct sockaddr has sa_len field], ac_cv_struct_sockaddr_sa_len, AC_TRY_COMPILE([#include <sys/types.h> #include <sys/socket.h>], [struct sockaddr s; s.sa_len = 10;], ac_cv_struct_sockaddr_sa_len=yes, ac_cv_struct_sockaddr_sa_len=no)) dnl FIXME convbreak case ${ac_cv_struct_sockaddr_sa_len} in "no" ) AC_DEFINE(NO_SA_LEN,[1],[Define if you dont have salen]) ;; *) ;; esac ]) dnl ---------------------------------------------------------------------- dnl dnl LM_STRUCT_EXCEPTION dnl dnl Check to see whether the system supports the matherr function dnl and its associated type "struct exception". dnl AC_DEFUN(LM_STRUCT_EXCEPTION, [AC_CACHE_CHECK([for struct exception (and matherr function)], ac_cv_struct_exception, AC_TRY_COMPILE([#include <math.h>], [struct exception x; x.type = DOMAIN; x.type = SING;], ac_cv_struct_exception=yes, ac_cv_struct_exception=no)) case "${ac_cv_struct_exception}" in "yes" ) AC_DEFINE(USE_MATHERR,[1],[Define if you have matherr() function and struct exception type]) ;; * ) ;; esac ]) dnl ---------------------------------------------------------------------- dnl dnl LM_SYS_IPV6 dnl dnl Check for ipv6 support and what the in6_addr structure is called. dnl (early linux used in_addr6 insted of in6_addr) dnl AC_DEFUN(LM_SYS_IPV6, [AC_MSG_CHECKING(for IP version 6 support) AC_CACHE_VAL(ac_cv_sys_ipv6_support, [ok_so_far=yes AC_TRY_COMPILE([#include <sys/types.h> #ifdef __WIN32__ #include <winsock2.h> #include <ws2tcpip.h> #else #include <netinet/in.h> #endif], [struct in6_addr a6; struct sockaddr_in6 s6;], ok_so_far=yes, ok_so_far=no) if test $ok_so_far = yes; then ac_cv_sys_ipv6_support=yes else AC_TRY_COMPILE([#include <sys/types.h> #ifdef __WIN32__ #include <winsock2.h> #include <ws2tcpip.h> #else #include <netinet/in.h> #endif], [struct in_addr6 a6; struct sockaddr_in6 s6;], ac_cv_sys_ipv6_support=in_addr6, ac_cv_sys_ipv6_support=no) fi ])dnl dnl dnl Have to use old style AC_DEFINE due to BC with old autoconf. dnl case ${ac_cv_sys_ipv6_support} in yes) AC_MSG_RESULT(yes) AC_DEFINE(HAVE_IN6,[1],[Define if ipv6 is present]) ;; in_addr6) AC_MSG_RESULT([yes (but I am redefining in_addr6 to in6_addr)]) AC_DEFINE(HAVE_IN6,[1],[Define if ipv6 is present]) AC_DEFINE(HAVE_IN_ADDR6_STRUCT,[],[Early linux used in_addr6 instead of in6_addr, define if you have this]) ;; *) AC_MSG_RESULT(no) ;; esac ]) dnl ---------------------------------------------------------------------- dnl dnl LM_SYS_MULTICAST dnl dnl Check for multicast support. Only checks for multicast options in dnl setsockopt(), no check is performed that multicasting actually works. dnl If options are found defines HAVE_MULTICAST_SUPPORT dnl AC_DEFUN(LM_SYS_MULTICAST, [AC_CACHE_CHECK([for multicast support], ac_cv_sys_multicast_support, [AC_EGREP_CPP(^yes$, [#include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> #if defined(IP_MULTICAST_TTL) && defined(IP_MULTICAST_LOOP) && defined(IP_MULTICAST_IF) && defined(IP_ADD_MEMBERSHIP) && defined(IP_DROP_MEMBERSHIP) yes #endif ], ac_cv_sys_multicast_support=yes, ac_cv_sys_multicast_support=no)]) if test $ac_cv_sys_multicast_support = yes; then AC_DEFINE(HAVE_MULTICAST_SUPPORT,[1], [Define if setsockopt() accepts multicast options]) fi ])dnl dnl ---------------------------------------------------------------------- dnl dnl LM_DECL_SYS_ERRLIST dnl dnl Define SYS_ERRLIST_DECLARED if the variable sys_errlist is declared dnl in a system header file, stdio.h or errno.h. dnl AC_DEFUN(LM_DECL_SYS_ERRLIST, [AC_CACHE_CHECK([for sys_errlist declaration in stdio.h or errno.h], ac_cv_decl_sys_errlist, [AC_TRY_COMPILE([#include <stdio.h> #include <errno.h>], [char *msg = *(sys_errlist + 1);], ac_cv_decl_sys_errlist=yes, ac_cv_decl_sys_errlist=no)]) if test $ac_cv_decl_sys_errlist = yes; then AC_DEFINE(SYS_ERRLIST_DECLARED,[], [define if the variable sys_errlist is declared in a system header file]) fi ]) dnl ---------------------------------------------------------------------- dnl dnl LM_CHECK_FUNC_DECL( funname, declaration [, extra includes dnl [, action-if-found [, action-if-not-found]]] ) dnl dnl Checks if the declaration "declaration" of "funname" conflicts dnl with the header files idea of how the function should be dnl declared. It is useful on systems which lack prototypes and you dnl need to provide your own (e.g. when you want to take the address dnl of a function). The 4'th argument is expanded if conflicting, dnl the 5'th argument otherwise dnl dnl AC_DEFUN(LM_CHECK_FUNC_DECL, [AC_MSG_CHECKING([for conflicting declaration of $1]) AC_CACHE_VAL(ac_cv_func_decl_$1, [AC_TRY_COMPILE([#include <stdio.h> $3],[$2 char *c = (char *)$1; ], eval "ac_cv_func_decl_$1=no", eval "ac_cv_func_decl_$1=yes")]) if eval "test \"`echo '$ac_cv_func_decl_'$1`\" = yes"; then AC_MSG_RESULT(yes) ifelse([$4], , :, [$4]) else AC_MSG_RESULT(no) ifelse([$5], , , [$5 ])dnl fi ]) dnl ---------------------------------------------------------------------- dnl dnl AC_DOUBLE_MIDDLE_ENDIAN dnl dnl Checks whether doubles are represented in "middle-endian" format. dnl Sets ac_cv_double_middle_endian={no,yes,unknown} accordingly, dnl as well as DOUBLE_MIDDLE_ENDIAN. dnl dnl AC_DEFUN([AC_C_DOUBLE_MIDDLE_ENDIAN], [AC_CACHE_CHECK(whether double word ordering is middle-endian, ac_cv_c_double_middle_endian, [# It does not; compile a test program. AC_RUN_IFELSE( [AC_LANG_SOURCE([[#include <stdlib.h> int main(void) { int i = 0; int zero = 0; int bigendian; int zero_index = 0; union { long int l; char c[sizeof (long int)]; } u; /* we'll use the one with 32-bit words */ union { double d; unsigned int c[2]; } vint; union { double d; unsigned long c[2]; } vlong; union { double d; unsigned short c[2]; } vshort; /* Are we little or big endian? From Harbison&Steele. */ u.l = 1; bigendian = (u.c[sizeof (long int) - 1] == 1); zero_index = bigendian ? 1 : 0; vint.d = 1.0; vlong.d = 1.0; vshort.d = 1.0; if (sizeof(unsigned int) == 4) { if (vint.c[zero_index] != 0) zero = 1; } else if (sizeof(unsigned long) == 4) { if (vlong.c[zero_index] != 0) zero = 1; } else if (sizeof(unsigned short) == 4) { if (vshort.c[zero_index] != 0) zero = 1; } exit (zero); } ]])], [ac_cv_c_double_middle_endian=no], [ac_cv_c_double_middle_endian=yes], [ac_cv_c_double_middle=unknown])]) case $ac_cv_c_double_middle_endian in yes) m4_default([$1], [AC_DEFINE([DOUBLE_MIDDLE_ENDIAN], 1, [Define to 1 if your processor stores the words in a double in middle-endian format (like some ARMs).])]) ;; no) $2 ;; *) m4_default([$3], [AC_MSG_WARN([unknown double endianness presetting ac_cv_c_double_middle_endian=no (or yes) will help])]) ;; esac ])# AC_C_DOUBLE_MIDDLE_ENDIAN AC_DEFUN(ERL_MONOTONIC_CLOCK, [ if test "$3" = "yes"; then default_resolution_clock_gettime_monotonic="CLOCK_HIGHRES CLOCK_BOOTTIME CLOCK_MONOTONIC" low_resolution_clock_gettime_monotonic="CLOCK_MONOTONIC_COARSE CLOCK_MONOTONIC_FAST" high_resolution_clock_gettime_monotonic="CLOCK_MONOTONIC_PRECISE" else default_resolution_clock_gettime_monotonic="CLOCK_HIGHRES CLOCK_UPTIME CLOCK_MONOTONIC" low_resolution_clock_gettime_monotonic="CLOCK_MONOTONIC_COARSE CLOCK_UPTIME_FAST" high_resolution_clock_gettime_monotonic="CLOCK_UPTIME_PRECISE" fi case "$1" in high_resolution) check_msg="high resolution " prefer_resolution_clock_gettime_monotonic="$high_resolution_clock_gettime_monotonic" ;; low_resolution) check_msg="low resolution " prefer_resolution_clock_gettime_monotonic="$low_resolution_clock_gettime_monotonic" ;; custom_resolution) check_msg="custom resolution " prefer_resolution_clock_gettime_monotonic="$2" ;; *) check_msg="custom " prefer_resolution_clock_gettime_monotonic="$2" ;; esac AC_CACHE_CHECK([for clock_gettime(CLOCK_MONOTONIC_RAW, _)], erl_cv_clock_gettime_monotonic_raw, [ AC_TRY_COMPILE([ #include <time.h> ], [ struct timespec ts; long long result; clock_gettime(CLOCK_MONOTONIC_RAW, &ts); result = ((long long) ts.tv_sec) * 1000000000LL + ((long long) ts.tv_nsec); ], erl_cv_clock_gettime_monotonic_raw=yes, erl_cv_clock_gettime_monotonic_raw=no) ]) AC_CACHE_CHECK([for clock_gettime() with ${check_msg}monotonic clock type], erl_cv_clock_gettime_monotonic_$1, [ for clock_type in $prefer_resolution_clock_gettime_monotonic $default_resolution_clock_gettime_monotonic $high_resolution_clock_gettime_monotonic $low_resolution_clock_gettime_monotonic; do AC_TRY_COMPILE([ #include <time.h> ], [ struct timespec ts; long long result; clock_gettime($clock_type,&ts); result = ((long long) ts.tv_sec) * 1000000000LL + ((long long) ts.tv_nsec); ], erl_cv_clock_gettime_monotonic_$1=$clock_type, erl_cv_clock_gettime_monotonic_$1=no) test $erl_cv_clock_gettime_monotonic_$1 = no || break done ]) AC_CHECK_FUNCS([clock_getres clock_get_attributes gethrtime]) AC_CACHE_CHECK([for mach clock_get_time() with monotonic clock type], erl_cv_mach_clock_get_time_monotonic, [ AC_TRY_COMPILE([ #include <mach/clock.h> #include <mach/mach.h> ], [ kern_return_t res; clock_serv_t clk_srv; mach_timespec_t time_spec; host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &clk_srv); res = clock_get_time(clk_srv, &time_spec); mach_port_deallocate(mach_task_self(), clk_srv); ], erl_cv_mach_clock_get_time_monotonic=yes, erl_cv_mach_clock_get_time_monotonic=no) ]) erl_corrected_monotonic_clock=no case $erl_cv_clock_gettime_monotonic_$1-$ac_cv_func_gethrtime-$erl_cv_mach_clock_get_time_monotonic-$host_os in *-*-*-win32) erl_monotonic_clock_func=WindowsAPI ;; CLOCK_*-*-*-linux*) case $erl_cv_clock_gettime_monotonic_$1-$erl_cv_clock_gettime_monotonic_raw in CLOCK_BOOTTIME-yes|CLOCK_MONOTONIC-yes) erl_corrected_monotonic_clock=yes ;; *) # We don't trust CLOCK_MONOTONIC to be NTP # adjusted on linux systems that do not have # CLOCK_MONOTONIC_RAW (although it seems to # be...) ;; esac erl_monotonic_clock_func=clock_gettime ;; no-no-no-linux*) erl_monotonic_clock_func=times ;; CLOCK_*-*-*-*) erl_monotonic_clock_func=clock_gettime ;; no-yes-*-*) erl_monotonic_clock_func=gethrtime ;; no-no-yes-*) erl_monotonic_clock_func=mach_clock_get_time ;; no-no-no-*) erl_monotonic_clock_func=none ;; esac erl_monotonic_clock_low_resolution=no erl_monotonic_clock_lib= erl_monotonic_clock_id= case $erl_monotonic_clock_func in clock_gettime) erl_monotonic_clock_id=$erl_cv_clock_gettime_monotonic_$1 for low_res_id in $low_resolution_clock_gettime_monotonic; do if test $erl_monotonic_clock_id = $low_res_id; then erl_monotonic_clock_low_resolution=yes break fi done AC_CHECK_LIB(rt, clock_gettime, [erl_monotonic_clock_lib="-lrt"]) ;; mach_clock_get_time) erl_monotonic_clock_id=SYSTEM_CLOCK ;; times) erl_monotonic_clock_low_resolution=yes ;; *) ;; esac ]) AC_DEFUN(ERL_WALL_CLOCK, [ default_resolution_clock_gettime_wall="CLOCK_REALTIME" low_resolution_clock_gettime_wall="CLOCK_REALTIME_COARSE CLOCK_REALTIME_FAST" high_resolution_clock_gettime_wall="CLOCK_REALTIME_PRECISE" case "$1" in high_resolution) check_msg="high resolution " prefer_resolution_clock_gettime_wall="$high_resolution_clock_gettime_wall" ;; low_resolution) check_msg="low resolution " prefer_resolution_clock_gettime_wall="$low_resolution_clock_gettime_wall" ;; custom_resolution) check_msg="custom resolution " prefer_resolution_clock_gettime_wall="$2" ;; *) check_msg="" prefer_resolution_clock_gettime_wall= ;; esac AC_CACHE_CHECK([for clock_gettime() with ${check_msg}wall clock type], erl_cv_clock_gettime_wall_$1, [ for clock_type in $prefer_resolution_clock_gettime_wall $default_resolution_clock_gettime_wall $high_resolution_clock_gettime_wall $low_resolution_clock_gettime_wall; do AC_TRY_COMPILE([ #include <time.h> ], [ struct timespec ts; long long result; clock_gettime($clock_type,&ts); result = ((long long) ts.tv_sec) * 1000000000LL + ((long long) ts.tv_nsec); ], erl_cv_clock_gettime_wall_$1=$clock_type, erl_cv_clock_gettime_wall_$1=no) test $erl_cv_clock_gettime_wall_$1 = no || break done ]) AC_CHECK_FUNCS([clock_getres clock_get_attributes gettimeofday]) AC_CACHE_CHECK([for mach clock_get_time() with wall clock type], erl_cv_mach_clock_get_time_wall, [ AC_TRY_COMPILE([ #include <mach/clock.h> #include <mach/mach.h> ], [ kern_return_t res; clock_serv_t clk_srv; mach_timespec_t time_spec; host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &clk_srv); res = clock_get_time(clk_srv, &time_spec); mach_port_deallocate(mach_task_self(), clk_srv); ], erl_cv_mach_clock_get_time_wall=yes, erl_cv_mach_clock_get_time_wall=no) ]) erl_wall_clock_low_resolution=no erl_wall_clock_id= case $1-$erl_cv_clock_gettime_wall_$1-$erl_cv_mach_clock_get_time_wall-$ac_cv_func_gettimeofday-$host_os in *-*-*-*-win32) erl_wall_clock_func=WindowsAPI erl_wall_clock_low_resolution=yes ;; high_resolution-no-yes-*-*) erl_wall_clock_func=mach_clock_get_time erl_wall_clock_id=CALENDAR_CLOCK ;; *-CLOCK_*-*-*-*) erl_wall_clock_func=clock_gettime erl_wall_clock_id=$erl_cv_clock_gettime_wall_$1 for low_res_id in $low_resolution_clock_gettime_wall; do if test $erl_wall_clock_id = $low_res_id; then erl_wall_clock_low_resolution=yes break fi done ;; *-no-*-yes-*) erl_wall_clock_func=gettimeofday ;; *) erl_wall_clock_func=none ;; esac ]) dnl ---------------------------------------------------------------------- dnl dnl LM_CHECK_THR_LIB dnl dnl This macro may be used by any OTP application. dnl dnl LM_CHECK_THR_LIB sets THR_LIBS, THR_DEFS, and THR_LIB_NAME. It also dnl checks for some pthread headers which will appear in DEFS or config.h. dnl AC_DEFUN(LM_CHECK_THR_LIB, [ NEED_NPTL_PTHREAD_H=no dnl win32? AC_MSG_CHECKING([for native win32 threads]) if test "X$host_os" = "Xwin32"; then AC_MSG_RESULT(yes) THR_DEFS="-DWIN32_THREADS" THR_LIBS= THR_LIB_NAME=win32_threads THR_LIB_TYPE=win32_threads else AC_MSG_RESULT(no) THR_DEFS= THR_LIBS= THR_LIB_NAME= THR_LIB_TYPE=posix_unknown dnl Try to find POSIX threads dnl The usual pthread lib... AC_CHECK_LIB(pthread, pthread_create, THR_LIBS="-lpthread") dnl Very old versions of FreeBSD have pthreads in special c library, c_r... if test "x$THR_LIBS" = "x"; then AC_CHECK_LIB(c_r, pthread_create, THR_LIBS="-lc_r") fi dnl QNX has pthreads in standard C library if test "x$THR_LIBS" = "x"; then AC_CHECK_FUNC(pthread_create, THR_LIBS="none_needed") fi dnl On ofs1 the '-pthread' switch should be used if test "x$THR_LIBS" = "x"; then AC_MSG_CHECKING([if the '-pthread' switch can be used]) saved_cflags=$CFLAGS CFLAGS="$CFLAGS -pthread" AC_TRY_LINK([#include <pthread.h>], pthread_create((void*)0,(void*)0,(void*)0,(void*)0);, [THR_DEFS="-pthread" THR_LIBS="-pthread"]) CFLAGS=$saved_cflags if test "x$THR_LIBS" != "x"; then AC_MSG_RESULT(yes) else AC_MSG_RESULT(no) fi fi if test "x$THR_LIBS" != "x"; then THR_DEFS="$THR_DEFS -D_THREAD_SAFE -D_REENTRANT -DPOSIX_THREADS" THR_LIB_NAME=pthread if test "x$THR_LIBS" = "xnone_needed"; then THR_LIBS= fi case $host_os in solaris*) THR_DEFS="$THR_DEFS -D_POSIX_PTHREAD_SEMANTICS" ;; linux*) THR_DEFS="$THR_DEFS -D_POSIX_THREAD_SAFE_FUNCTIONS" LM_CHECK_GETCONF AC_MSG_CHECKING(for Native POSIX Thread Library) libpthr_vsn=`$GETCONF GNU_LIBPTHREAD_VERSION 2>/dev/null` if test $? -eq 0; then case "$libpthr_vsn" in *nptl*|*NPTL*) nptl=yes;; *) nptl=no;; esac elif test "$cross_compiling" = "yes"; then case "$erl_xcomp_linux_nptl" in "") nptl=cross;; yes|no) nptl=$erl_xcomp_linux_nptl;; *) AC_MSG_ERROR([Bad erl_xcomp_linux_nptl value: $erl_xcomp_linux_nptl]);; esac else nptl=no fi AC_MSG_RESULT($nptl) if test $nptl = cross; then nptl=yes AC_MSG_WARN([result yes guessed because of cross compilation]) fi if test $nptl = yes; then THR_LIB_TYPE=posix_nptl need_nptl_incldir=no AC_CHECK_HEADER(nptl/pthread.h, [need_nptl_incldir=yes NEED_NPTL_PTHREAD_H=yes]) if test $need_nptl_incldir = yes; then # Ahh... nptl_path="$C_INCLUDE_PATH:$CPATH" if test X$cross_compiling != Xyes; then nptl_path="$nptl_path:/usr/local/include:/usr/include" else IROOT="$erl_xcomp_isysroot" test "$IROOT" != "" || IROOT="$erl_xcomp_sysroot" test "$IROOT" != "" || AC_MSG_ERROR([Don't know where to search for includes! Please set erl_xcomp_isysroot]) nptl_path="$nptl_path:$IROOT/usr/local/include:$IROOT/usr/include" fi nptl_ws_path= save_ifs="$IFS"; IFS=":" for dir in $nptl_path; do if test "x$dir" != "x"; then nptl_ws_path="$nptl_ws_path $dir" fi done IFS=$save_ifs nptl_incldir= for dir in $nptl_ws_path; do AC_CHECK_HEADER($dir/nptl/pthread.h, nptl_incldir=$dir/nptl) if test "x$nptl_incldir" != "x"; then THR_DEFS="$THR_DEFS -isystem $nptl_incldir" break fi done if test "x$nptl_incldir" = "x"; then AC_MSG_ERROR(Failed to locate nptl system include directory) fi fi fi ;; *) ;; esac dnl We sometimes need THR_DEFS in order to find certain headers dnl (at least for pthread.h on osf1). saved_cppflags=$CPPFLAGS CPPFLAGS="$CPPFLAGS $THR_DEFS" dnl dnl Check for headers dnl AC_CHECK_HEADER(pthread.h, AC_DEFINE(HAVE_PTHREAD_H, 1, \ [Define if you have the <pthread.h> header file.])) dnl Some Linuxes have <pthread/mit/pthread.h> instead of <pthread.h> AC_CHECK_HEADER(pthread/mit/pthread.h, \ AC_DEFINE(HAVE_MIT_PTHREAD_H, 1, \ [Define if the pthread.h header file is in pthread/mit directory.])) dnl restore CPPFLAGS CPPFLAGS=$saved_cppflags fi fi ]) AC_DEFUN(ERL_INTERNAL_LIBS, [ ERTS_INTERNAL_X_LIBS= AC_CHECK_LIB(kstat, kstat_open, [AC_DEFINE(HAVE_KSTAT, 1, [Define if you have kstat]) ERTS_INTERNAL_X_LIBS="$ERTS_INTERNAL_X_LIBS -lkstat"]) AC_SUBST(ERTS_INTERNAL_X_LIBS) ]) AC_DEFUN(ETHR_CHK_GCC_ATOMIC_OP__, [ # $1 - atomic_op for atomic_bit_size in 32 64 128; do case $atomic_bit_size in 32) gcc_atomic_type="$gcc_atomic_type32";; 64) gcc_atomic_type="$gcc_atomic_type64";; 128) gcc_atomic_type="$gcc_atomic_type128";; esac gcc_atomic_lockfree="int x[[(2*__atomic_always_lock_free(sizeof($gcc_atomic_type), 0))-1]]" case $1 in __sync_add_and_fetch | __sync_fetch_and_and | __sync_fetch_and_or) atomic_call="volatile $gcc_atomic_type var; $gcc_atomic_type res = $1(&var, ($gcc_atomic_type) 0);" ;; __sync_val_compare_and_swap) atomic_call="volatile $gcc_atomic_type var; $gcc_atomic_type res = $1(&var, ($gcc_atomic_type) 0, ($gcc_atomic_type) 0);" ;; __atomic_store_n) atomic_call="$gcc_atomic_lockfree; volatile $gcc_atomic_type var; $1(&var, ($gcc_atomic_type) 0, __ATOMIC_RELAXED); $1(&var, ($gcc_atomic_type) 0, __ATOMIC_RELEASE);" ;; __atomic_load_n) atomic_call="$gcc_atomic_lockfree; volatile $gcc_atomic_type var; $gcc_atomic_type res = $1(&var, __ATOMIC_RELAXED); res = $1(&var, __ATOMIC_ACQUIRE);" ;; __atomic_add_fetch| __atomic_fetch_and | __atomic_fetch_or) atomic_call="$gcc_atomic_lockfree; volatile $gcc_atomic_type var; $gcc_atomic_type res = $1(&var, ($gcc_atomic_type) 0, __ATOMIC_RELAXED); res = $1(&var, ($gcc_atomic_type) 0, __ATOMIC_ACQUIRE); res = $1(&var, ($gcc_atomic_type) 0, __ATOMIC_RELEASE);" ;; __atomic_compare_exchange_n) atomic_call="$gcc_atomic_lockfree; volatile $gcc_atomic_type var; $gcc_atomic_type val; int res = $1(&var, &val, ($gcc_atomic_type) 0, 0, __ATOMIC_RELAXED, __ATOMIC_RELAXED); res = $1(&var, &val, ($gcc_atomic_type) 0, 0, __ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE);" ;; *) AC_MSG_ERROR([Internal error: missing implementation for $1]) ;; esac eval atomic${atomic_bit_size}_call=\"$atomic_call\" done AC_CACHE_CHECK([for 32-bit $1()], ethr_cv_32bit_$1, [ ethr_cv_32bit_$1=no AC_TRY_LINK([], [$atomic32_call], [ethr_cv_32bit_$1=yes]) ]) AC_CACHE_CHECK([for 64-bit $1()], ethr_cv_64bit_$1, [ ethr_cv_64bit_$1=no AC_TRY_LINK([], [$atomic64_call], [ethr_cv_64bit_$1=yes]) ]) AC_CACHE_CHECK([for 128-bit $1()], ethr_cv_128bit_$1, [ ethr_cv_128bit_$1=no AC_TRY_LINK([], [$atomic128_call], [ethr_cv_128bit_$1=yes]) ]) case $ethr_cv_128bit_$1-$ethr_cv_64bit_$1-$ethr_cv_32bit_$1 in no-no-no) have_atomic_ops=0;; no-no-yes) have_atomic_ops=4;; no-yes-no) have_atomic_ops=8;; no-yes-yes) have_atomic_ops=12;; yes-no-no) have_atomic_ops=16;; yes-no-yes) have_atomic_ops=20;; yes-yes-no) have_atomic_ops=24;; yes-yes-yes) have_atomic_ops=28;; esac AC_DEFINE_UNQUOTED([ETHR_HAVE_$1], [$have_atomic_ops], [Define as a bitmask corresponding to the word sizes that $1() can handle on your system]) ]) AC_DEFUN(ETHR_CHK_IF_NOOP, [ ethr_test_filename="chk_if_$1$3_noop_config1test.$$" cat > "${ethr_test_filename}.c" <<EOF int my_test(void) { $1$2; return 0; } EOF $CC -O3 $ETHR_DEFS -c "${ethr_test_filename}.c" -o "${ethr_test_filename}1.o" cat > "${ethr_test_filename}.c" <<EOF int my_test(void) { ; return 0; } EOF $CC -O3 $ETHR_DEFS -c "${ethr_test_filename}.c" -o "${ethr_test_filename}2.o" if diff "${ethr_test_filename}1.o" "${ethr_test_filename}2.o" >/dev/null 2>&1; then ethr_$1$3_noop=yes else ethr_$1$3_noop=no fi rm -f "${ethr_test_filename}.c" "${ethr_test_filename}1.o" "${ethr_test_filename}2.o" ]) AC_DEFUN(ETHR_CHK_GCC_ATOMIC_OPS, [ AC_CHECK_SIZEOF(short) AC_CHECK_SIZEOF(int) AC_CHECK_SIZEOF(long) AC_CHECK_SIZEOF(long long) AC_CHECK_SIZEOF(__int128_t) if test "$ac_cv_sizeof_short" = "4"; then gcc_atomic_type32="short" elif test "$ac_cv_sizeof_int" = "4"; then gcc_atomic_type32="int" elif test "$ac_cv_sizeof_long" = "4"; then gcc_atomic_type32="long" else AC_MSG_ERROR([No 32-bit type found]) fi if test "$ac_cv_sizeof_int" = "8"; then gcc_atomic_type64="int" elif test "$ac_cv_sizeof_long" = "8"; then gcc_atomic_type64="long" elif test "$ac_cv_sizeof_long_long" = "8"; then gcc_atomic_type64="long long" else AC_MSG_ERROR([No 64-bit type found]) fi if test "$ac_cv_sizeof___int128_t" = "16"; then gcc_atomic_type128="__int128_t" else gcc_atomic_type128="#error " fi AC_CACHE_CHECK([for a working __sync_synchronize()], ethr_cv___sync_synchronize, [ ethr_cv___sync_synchronize=no AC_TRY_LINK([], [ __sync_synchronize(); ], [ethr_cv___sync_synchronize=yes]) if test $ethr_cv___sync_synchronize = yes; then # # Old gcc versions on at least x86 have a buggy # __sync_synchronize() which does not emit a # memory barrier. We try to detect this by # compiling to assembly with and without # __sync_synchronize() and compare the results. # ETHR_CHK_IF_NOOP(__sync_synchronize, [()], []) if test $ethr___sync_synchronize_noop = yes; then # Got a buggy implementation of # __sync_synchronize... ethr_cv___sync_synchronize="no; buggy implementation" fi fi ]) if test "$ethr_cv___sync_synchronize" = "yes"; then have_sync_synchronize_value="~0" else have_sync_synchronize_value="0" fi AC_DEFINE_UNQUOTED([ETHR_HAVE___sync_synchronize], [$have_sync_synchronize_value], [Define as a bitmask corresponding to the word sizes that __sync_synchronize() can handle on your system]) ETHR_CHK_GCC_ATOMIC_OP__(__sync_add_and_fetch) ETHR_CHK_GCC_ATOMIC_OP__(__sync_fetch_and_and) ETHR_CHK_GCC_ATOMIC_OP__(__sync_fetch_and_or) ETHR_CHK_GCC_ATOMIC_OP__(__sync_val_compare_and_swap) ETHR_CHK_GCC_ATOMIC_OP__(__atomic_store_n) ETHR_CHK_GCC_ATOMIC_OP__(__atomic_load_n) ETHR_CHK_GCC_ATOMIC_OP__(__atomic_add_fetch) ETHR_CHK_GCC_ATOMIC_OP__(__atomic_fetch_and) ETHR_CHK_GCC_ATOMIC_OP__(__atomic_fetch_or) ETHR_CHK_GCC_ATOMIC_OP__(__atomic_compare_exchange_n) ethr_have_gcc_native_atomics=no ethr_arm_dbm_instr_val=0 case "$GCC-$host_cpu" in yes-arm*) AC_CACHE_CHECK([for ARM DMB instruction], ethr_cv_arm_dbm_instr, [ ethr_cv_arm_dbm_instr=no AC_TRY_LINK([], [ __asm__ __volatile__("dmb sy" : : : "memory"); __asm__ __volatile__("dmb st" : : : "memory"); ], [ethr_cv_arm_dbm_instr=yes]) ]) if test $ethr_cv_arm_dbm_instr = yes; then ethr_arm_dbm_instr_val=1 test $ethr_cv_64bit___atomic_compare_exchange_n = yes && ethr_have_gcc_native_atomics=yes fi;; *) ;; esac AC_DEFINE_UNQUOTED([ETHR_HAVE_GCC_ASM_ARM_DMB_INSTRUCTION], [$ethr_arm_dbm_instr_val], [Define as a boolean indicating whether you have a gcc compatible compiler capable of generating the ARM DMB instruction, and are compiling for an ARM processor with ARM DMB instruction support, or not]) test $ethr_cv_32bit___sync_val_compare_and_swap = yes && ethr_have_gcc_native_atomics=yes test $ethr_cv_64bit___sync_val_compare_and_swap = yes && ethr_have_gcc_native_atomics=yes if test "$ethr_cv___sync_synchronize" = "yes"; then test $ethr_cv_64bit___atomic_compare_exchange_n = yes && ethr_have_gcc_native_atomics=yes test $ethr_cv_32bit___atomic_compare_exchange_n = yes && ethr_have_gcc_native_atomics=yes fi ethr_have_gcc_atomic_builtins=0 if test $ethr_have_gcc_native_atomics = yes; then ethr_native_atomic_implementation=gcc_sync test $ethr_cv_32bit___atomic_compare_exchange_n = yes && ethr_have_gcc_atomic_builtins=1 test $ethr_cv_64bit___atomic_compare_exchange_n = yes && ethr_have_gcc_atomic_builtins=1 test $ethr_have_gcc_atomic_builtins = 1 && ethr_native_atomic_implementation=gcc_atomic_sync fi AC_DEFINE_UNQUOTED([ETHR_HAVE_GCC___ATOMIC_BUILTINS], [$ethr_have_gcc_atomic_builtins], [Define as a boolean indicating whether you have a gcc __atomic builtins or not]) test $ethr_have_gcc_native_atomics = yes && ethr_have_native_atomics=yes ]) AC_DEFUN(ETHR_CHK_INTERLOCKED, [ ilckd="$1" AC_MSG_CHECKING([for ${ilckd}()]) case "$2" in "1") ilckd_call="${ilckd}(var);";; "2") ilckd_call="${ilckd}(var, ($3) 0);";; "3") ilckd_call="${ilckd}(var, ($3) 0, ($3) 0);";; "4") ilckd_call="${ilckd}(var, ($3) 0, ($3) 0, arr);";; esac have_interlocked_op=no AC_TRY_LINK( [ #define WIN32_LEAN_AND_MEAN #include <windows.h> #include <intrin.h> ], [ volatile $3 *var; volatile $3 arr[2]; $ilckd_call return 0; ], [have_interlocked_op=yes]) test $have_interlocked_op = yes && $4 AC_MSG_RESULT([$have_interlocked_op]) ]) dnl ---------------------------------------------------------------------- dnl dnl ERL_FIND_ETHR_LIB dnl dnl NOTE! This macro may be changed at any time! Should *only* be used by dnl ERTS! dnl dnl Find a thread library to use. Sets ETHR_LIBS to libraries to link dnl with, ETHR_X_LIBS to extra libraries to link with (same as ETHR_LIBS dnl except that the ethread lib itself is not included), ETHR_DEFS to dnl defines to compile with, ETHR_THR_LIB_BASE to the name of the dnl thread library which the ethread library is based on, and ETHR_LIB_NAME dnl to the name of the library where the ethread implementation is located. dnl ERL_FIND_ETHR_LIB currently searches for 'pthreads', and dnl 'win32_threads'. If no thread library was found ETHR_LIBS, ETHR_X_LIBS, dnl ETHR_DEFS, ETHR_THR_LIB_BASE, and ETHR_LIB_NAME are all set to the dnl empty string. dnl AC_DEFUN(ERL_FIND_ETHR_LIB, [ AC_ARG_ENABLE(native-ethr-impls, AS_HELP_STRING([--disable-native-ethr-impls], [disable native ethread implementations]), [ case "$enableval" in no) disable_native_ethr_impls=yes ;; *) disable_native_ethr_impls=no ;; esac ], disable_native_ethr_impls=no) test "X$disable_native_ethr_impls" = "Xyes" && AC_DEFINE(ETHR_DISABLE_NATIVE_IMPLS, 1, [Define if you want to disable native ethread implementations]) AC_ARG_ENABLE(x86-out-of-order, AS_HELP_STRING([--enable-x86-out-of-order], [enable x86/x84_64 out of order support (default disabled)])) AC_ARG_ENABLE(prefer-gcc-native-ethr-impls, AS_HELP_STRING([--enable-prefer-gcc-native-ethr-impls], [prefer gcc native ethread implementations]), [ case "$enableval" in yes) enable_prefer_gcc_native_ethr_impls=yes ;; *) enable_prefer_gcc_native_ethr_impls=no ;; esac ], enable_prefer_gcc_native_ethr_impls=no) test $enable_prefer_gcc_native_ethr_impls = yes && AC_DEFINE(ETHR_PREFER_GCC_NATIVE_IMPLS, 1, [Define if you prefer gcc native ethread implementations]) AC_ARG_ENABLE(trust-gcc-atomic-builtins-memory-barriers, AS_HELP_STRING([--enable-trust-gcc-atomic-builtins-memory-barriers], [trust gcc atomic builtins memory barriers]), [ case "$enableval" in yes) trust_gcc_atomic_builtins_mbs=1 ;; *) trust_gcc_atomic_builtins_mbs=0 ;; esac ], trust_gcc_atomic_builtins_mbs=0) AC_DEFINE_UNQUOTED(ETHR_TRUST_GCC_ATOMIC_BUILTINS_MEMORY_BARRIERS, [$trust_gcc_atomic_builtins_mbs], [Define as a boolean indicating whether you trust gcc's __atomic_* builtins memory barrier implementations, or not]) AC_ARG_WITH(libatomic_ops, AS_HELP_STRING([--with-libatomic_ops=PATH], [specify and prefer usage of libatomic_ops in the ethread library])) AC_ARG_WITH(with_sparc_memory_order, AS_HELP_STRING([--with-sparc-memory-order=TSO|PSO|RMO], [specify sparc memory order (defaults to RMO)])) LM_CHECK_THR_LIB ERL_INTERNAL_LIBS ERL_MONOTONIC_CLOCK(try_find_pthread_compatible, CLOCK_HIGHRES CLOCK_MONOTONIC, no) case $erl_monotonic_clock_func in clock_gettime) AC_DEFINE(ETHR_HAVE_CLOCK_GETTIME_MONOTONIC, [1], [Define if you have a clock_gettime() with a monotonic clock]) ;; mach_clock_get_time) AC_DEFINE(ETHR_HAVE_MACH_CLOCK_GET_TIME, [1], [Define if you have a mach clock_get_time() with a monotonic clock]) ;; gethrtime) AC_DEFINE(ETHR_HAVE_GETHRTIME, [1], [Define if you have a monotonic gethrtime()]) ;; *) ;; esac if test "x$erl_monotonic_clock_id" != "x"; then AC_DEFINE_UNQUOTED(ETHR_MONOTONIC_CLOCK_ID, [$erl_monotonic_clock_id], [Define to the monotonic clock id to use]) fi ethr_native_atomic_implementation=none ethr_have_native_atomics=no ethr_have_native_spinlock=no ETHR_THR_LIB_BASE="$THR_LIB_NAME" ETHR_THR_LIB_BASE_TYPE="$THR_LIB_TYPE" ETHR_DEFS="$THR_DEFS" ETHR_X_LIBS="$THR_LIBS $ERTS_INTERNAL_X_LIBS $erl_monotonic_clock_lib" ETHR_LIBS= ETHR_LIB_NAME= ethr_modified_default_stack_size= dnl Name of lib where ethread implementation is located ethr_lib_name=ethread case "$THR_LIB_NAME" in win32_threads) ETHR_THR_LIB_BASE_DIR=win # * _WIN32_WINNT >= 0x0400 is needed for # TryEnterCriticalSection # * _WIN32_WINNT >= 0x0403 is needed for # InitializeCriticalSectionAndSpinCount # The ethread lib will refuse to build if _WIN32_WINNT < 0x0403. # # -D_WIN32_WINNT should have been defined in $CPPFLAGS; fetch it # and save it in ETHR_DEFS. found_win32_winnt=no for cppflag in $CPPFLAGS; do case $cppflag in -DWINVER*) ETHR_DEFS="$ETHR_DEFS $cppflag" ;; -D_WIN32_WINNT*) ETHR_DEFS="$ETHR_DEFS $cppflag" found_win32_winnt=yes ;; *) ;; esac done if test $found_win32_winnt = no; then AC_MSG_ERROR([-D_WIN32_WINNT missing in CPPFLAGS]) fi AC_DEFINE(ETHR_WIN32_THREADS, 1, [Define if you have win32 threads]) if test "X$disable_native_ethr_impls" = "Xyes"; then have_interlocked_op=no ethr_have_native_atomics=no else ETHR_CHK_INTERLOCKED([_InterlockedDecrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT, 1, [Define if you have _InterlockedDecrement()])) ETHR_CHK_INTERLOCKED([_InterlockedDecrement_rel], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT_REL, 1, [Define if you have _InterlockedDecrement_rel()])) ETHR_CHK_INTERLOCKED([_InterlockedIncrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT, 1, [Define if you have _InterlockedIncrement()])) ETHR_CHK_INTERLOCKED([_InterlockedIncrement_acq], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT_ACQ, 1, [Define if you have _InterlockedIncrement_acq()])) ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD, 1, [Define if you have _InterlockedExchangeAdd()])) ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd_acq], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD_ACQ, 1, [Define if you have _InterlockedExchangeAdd_acq()])) ETHR_CHK_INTERLOCKED([_InterlockedAnd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND, 1, [Define if you have _InterlockedAnd()])) ETHR_CHK_INTERLOCKED([_InterlockedOr], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR, 1, [Define if you have _InterlockedOr()])) ETHR_CHK_INTERLOCKED([_InterlockedExchange], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE, 1, [Define if you have _InterlockedExchange()])) ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE, 1, [Define if you have _InterlockedCompareExchange()])) test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange_acq], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE_ACQ, 1, [Define if you have _InterlockedCompareExchange_acq()])) test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange_rel], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE_REL, 1, [Define if you have _InterlockedCompareExchange_rel()])) test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes ETHR_CHK_INTERLOCKED([_InterlockedDecrement64], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT64, 1, [Define if you have _InterlockedDecrement64()])) ETHR_CHK_INTERLOCKED([_InterlockedDecrement64_rel], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT64_REL, 1, [Define if you have _InterlockedDecrement64_rel()])) ETHR_CHK_INTERLOCKED([_InterlockedIncrement64], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT64, 1, [Define if you have _InterlockedIncrement64()])) ETHR_CHK_INTERLOCKED([_InterlockedIncrement64_acq], [1], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT64_ACQ, 1, [Define if you have _InterlockedIncrement64_acq()])) ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64, 1, [Define if you have _InterlockedExchangeAdd64()])) ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd64_acq], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD64_ACQ, 1, [Define if you have _InterlockedExchangeAdd64_acq()])) ETHR_CHK_INTERLOCKED([_InterlockedAnd64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND64, 1, [Define if you have _InterlockedAnd64()])) ETHR_CHK_INTERLOCKED([_InterlockedOr64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR64, 1, [Define if you have _InterlockedOr64()])) ETHR_CHK_INTERLOCKED([_InterlockedExchange64], [2], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE64, 1, [Define if you have _InterlockedExchange64()])) ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64, 1, [Define if you have _InterlockedCompareExchange64()])) test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64_acq], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64_ACQ, 1, [Define if you have _InterlockedCompareExchange64_acq()])) test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange64_rel], [3], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE64_REL, 1, [Define if you have _InterlockedCompareExchange64_rel()])) test "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange128], [4], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE128, 1, [Define if you have _InterlockedCompareExchange128()])) fi if test "$ethr_have_native_atomics" = "yes"; then ethr_native_atomic_implementation=windows ethr_have_native_spinlock=yes fi ;; pthread) ETHR_THR_LIB_BASE_DIR=pthread AC_DEFINE(ETHR_PTHREADS, 1, [Define if you have pthreads]) case $host_os in openbsd*) # The default stack size is insufficient for our needs # on OpenBSD. We increase it to 256 kilo words. ethr_modified_default_stack_size=256;; linux*) ETHR_DEFS="$ETHR_DEFS -D_GNU_SOURCE" if test X$cross_compiling = Xyes; then case X$erl_xcomp_linux_usable_sigusrx in X) usable_sigusrx=cross;; Xyes|Xno) usable_sigusrx=$erl_xcomp_linux_usable_sigusrx;; *) AC_MSG_ERROR([Bad erl_xcomp_linux_usable_sigusrx value: $erl_xcomp_linux_usable_sigusrx]);; esac case X$erl_xcomp_linux_usable_sigaltstack in X) usable_sigaltstack=cross;; Xyes|Xno) usable_sigaltstack=$erl_xcomp_linux_usable_sigaltstack;; *) AC_MSG_ERROR([Bad erl_xcomp_linux_usable_sigaltstack value: $erl_xcomp_linux_usable_sigaltstack]);; esac else # FIXME: Test for actual problems instead of kernel versions linux_kernel_vsn_=`uname -r` case $linux_kernel_vsn_ in [[0-1]].*|2.[[0-1]]|2.[[0-1]].*) usable_sigusrx=no usable_sigaltstack=no;; 2.[[2-3]]|2.[[2-3]].*) usable_sigusrx=yes usable_sigaltstack=no;; *) usable_sigusrx=yes usable_sigaltstack=yes;; esac fi AC_MSG_CHECKING(if SIGUSR1 and SIGUSR2 can be used) AC_MSG_RESULT($usable_sigusrx) if test $usable_sigusrx = cross; then usable_sigusrx=yes AC_MSG_WARN([result yes guessed because of cross compilation]) fi if test $usable_sigusrx = no; then ETHR_DEFS="$ETHR_DEFS -DETHR_UNUSABLE_SIGUSRX" fi AC_MSG_CHECKING(if sigaltstack can be used) AC_MSG_RESULT($usable_sigaltstack) if test $usable_sigaltstack = cross; then usable_sigaltstack=yes AC_MSG_WARN([result yes guessed because of cross compilation]) fi if test $usable_sigaltstack = no; then ETHR_DEFS="$ETHR_DEFS -DETHR_UNUSABLE_SIGALTSTACK" fi ;; *) ;; esac dnl We sometimes need ETHR_DEFS in order to find certain headers dnl (at least for pthread.h on osf1). saved_cppflags="$CPPFLAGS" CPPFLAGS="$CPPFLAGS $ETHR_DEFS" dnl We need the thread library in order to find some functions saved_libs="$LIBS" LIBS="$LIBS $ETHR_X_LIBS" dnl dnl Check for headers dnl AC_CHECK_HEADER(pthread.h, \ AC_DEFINE(ETHR_HAVE_PTHREAD_H, 1, \ [Define if you have the <pthread.h> header file.])) dnl Some Linuxes have <pthread/mit/pthread.h> instead of <pthread.h> AC_CHECK_HEADER(pthread/mit/pthread.h, \ AC_DEFINE(ETHR_HAVE_MIT_PTHREAD_H, 1, \ [Define if the pthread.h header file is in pthread/mit directory.])) if test $NEED_NPTL_PTHREAD_H = yes; then AC_DEFINE(ETHR_NEED_NPTL_PTHREAD_H, 1, \ [Define if you need the <nptl/pthread.h> header file.]) fi AC_CHECK_HEADER(sched.h, \ AC_DEFINE(ETHR_HAVE_SCHED_H, 1, \ [Define if you have the <sched.h> header file.])) AC_CHECK_HEADER(sys/time.h, \ AC_DEFINE(ETHR_HAVE_SYS_TIME_H, 1, \ [Define if you have the <sys/time.h> header file.])) AC_TRY_COMPILE([#include <time.h> #include <sys/time.h>], [struct timeval *tv; return 0;], AC_DEFINE(ETHR_TIME_WITH_SYS_TIME, 1, \ [Define if you can safely include both <sys/time.h> and <time.h>.])) dnl dnl Check for functions dnl AC_CHECK_FUNC(pthread_spin_lock, \ [ethr_have_native_spinlock=yes \ AC_DEFINE(ETHR_HAVE_PTHREAD_SPIN_LOCK, 1, \ [Define if you have the pthread_spin_lock function.])]) have_sched_yield=no have_librt_sched_yield=no AC_CHECK_FUNC(sched_yield, [have_sched_yield=yes]) if test $have_sched_yield = no; then AC_CHECK_LIB(rt, sched_yield, [have_librt_sched_yield=yes ETHR_X_LIBS="$ETHR_X_LIBS -lrt"]) fi if test $have_sched_yield = yes || test $have_librt_sched_yield = yes; then AC_DEFINE(ETHR_HAVE_SCHED_YIELD, 1, [Define if you have the sched_yield() function.]) AC_MSG_CHECKING([whether sched_yield() returns an int]) sched_yield_ret_int=no AC_TRY_COMPILE([ #ifdef ETHR_HAVE_SCHED_H #include <sched.h> #endif ], [int sched_yield();], [sched_yield_ret_int=yes]) AC_MSG_RESULT([$sched_yield_ret_int]) if test $sched_yield_ret_int = yes; then AC_DEFINE(ETHR_SCHED_YIELD_RET_INT, 1, [Define if sched_yield() returns an int.]) fi fi have_pthread_yield=no AC_CHECK_FUNC(pthread_yield, [have_pthread_yield=yes]) if test $have_pthread_yield = yes; then AC_DEFINE(ETHR_HAVE_PTHREAD_YIELD, 1, [Define if you have the pthread_yield() function.]) AC_MSG_CHECKING([whether pthread_yield() returns an int]) pthread_yield_ret_int=no AC_TRY_COMPILE([ #if defined(ETHR_NEED_NPTL_PTHREAD_H) #include <nptl/pthread.h> #elif defined(ETHR_HAVE_MIT_PTHREAD_H) #include <pthread/mit/pthread.h> #elif defined(ETHR_HAVE_PTHREAD_H) #include <pthread.h> #endif ], [int pthread_yield();], [pthread_yield_ret_int=yes]) AC_MSG_RESULT([$pthread_yield_ret_int]) if test $pthread_yield_ret_int = yes; then AC_DEFINE(ETHR_PTHREAD_YIELD_RET_INT, 1, [Define if pthread_yield() returns an int.]) fi fi have_pthread_rwlock_init=no AC_CHECK_FUNC(pthread_rwlock_init, [have_pthread_rwlock_init=yes]) if test $have_pthread_rwlock_init = yes; then ethr_have_pthread_rwlockattr_setkind_np=no AC_CHECK_FUNC(pthread_rwlockattr_setkind_np, [ethr_have_pthread_rwlockattr_setkind_np=yes]) if test $ethr_have_pthread_rwlockattr_setkind_np = yes; then AC_DEFINE(ETHR_HAVE_PTHREAD_RWLOCKATTR_SETKIND_NP, 1, \ [Define if you have the pthread_rwlockattr_setkind_np() function.]) AC_MSG_CHECKING([for PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP]) ethr_pthread_rwlock_writer_nonrecursive_initializer_np=no AC_TRY_LINK([ #if defined(ETHR_NEED_NPTL_PTHREAD_H) #include <nptl/pthread.h> #elif defined(ETHR_HAVE_MIT_PTHREAD_H) #include <pthread/mit/pthread.h> #elif defined(ETHR_HAVE_PTHREAD_H) #include <pthread.h> #endif ], [ pthread_rwlockattr_t *attr; return pthread_rwlockattr_setkind_np(attr, PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP); ], [ethr_pthread_rwlock_writer_nonrecursive_initializer_np=yes]) AC_MSG_RESULT([$ethr_pthread_rwlock_writer_nonrecursive_initializer_np]) if test $ethr_pthread_rwlock_writer_nonrecursive_initializer_np = yes; then AC_DEFINE(ETHR_HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP, 1, \ [Define if you have the PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP rwlock attribute.]) fi fi fi if test "$force_pthread_rwlocks" = "yes"; then AC_DEFINE(ETHR_FORCE_PTHREAD_RWLOCK, 1, \ [Define if you want to force usage of pthread rwlocks]) if test $have_pthread_rwlock_init = yes; then AC_MSG_WARN([Forced usage of pthread rwlocks. Note that this implementation may suffer from starvation issues.]) else AC_MSG_ERROR([User forced usage of pthread rwlock, but no such implementation was found]) fi fi AC_CHECK_FUNC(pthread_attr_setguardsize, \ AC_DEFINE(ETHR_HAVE_PTHREAD_ATTR_SETGUARDSIZE, 1, \ [Define if you have the pthread_attr_setguardsize function.])) if test "x$erl_monotonic_clock_id" != "x"; then AC_MSG_CHECKING(whether pthread_cond_timedwait() can use the monotonic clock $erl_monotonic_clock_id for timeout) pthread_cond_timedwait_monotonic=no AC_TRY_LINK([ #if defined(ETHR_NEED_NPTL_PTHREAD_H) # include <nptl/pthread.h> #elif defined(ETHR_HAVE_MIT_PTHREAD_H) # include <pthread/mit/pthread.h> #elif defined(ETHR_HAVE_PTHREAD_H) # include <pthread.h> #endif #ifdef ETHR_TIME_WITH_SYS_TIME # include <time.h> # include <sys/time.h> #else # ifdef ETHR_HAVE_SYS_TIME_H # include <sys/time.h> # else # include <time.h> # endif #endif #if defined(ETHR_HAVE_MACH_CLOCK_GET_TIME) # include <mach/clock.h> # include <mach/mach.h> #endif ], [ int res; pthread_condattr_t attr; pthread_cond_t cond; struct timespec cond_timeout; pthread_mutex_t mutex; res = pthread_condattr_init(&attr); res = pthread_condattr_setclock(&attr, ETHR_MONOTONIC_CLOCK_ID); res = pthread_cond_init(&cond, &attr); res = pthread_cond_timedwait(&cond, &mutex, &cond_timeout); ], [pthread_cond_timedwait_monotonic=yes]) AC_MSG_RESULT([$pthread_cond_timedwait_monotonic]) if test $pthread_cond_timedwait_monotonic = yes; then AC_DEFINE(ETHR_HAVE_PTHREAD_COND_TIMEDWAIT_MONOTONIC, [1], [Define if pthread_cond_timedwait() can be used with a monotonic clock]) fi fi linux_futex=no AC_MSG_CHECKING([for Linux futexes]) AC_TRY_LINK([ #include <sys/syscall.h> #include <unistd.h> #include <linux/futex.h> #include <sys/time.h> ], [ int i = 1; syscall(__NR_futex, (void *) &i, FUTEX_WAKE, 1, (void*)0,(void*)0, 0); syscall(__NR_futex, (void *) &i, FUTEX_WAIT, 0, (void*)0,(void*)0, 0); return 0; ], linux_futex=yes) AC_MSG_RESULT([$linux_futex]) test $linux_futex = yes && AC_DEFINE(ETHR_HAVE_LINUX_FUTEX, 1, [Define if you have a linux futex implementation.]) pthread_setname=no AC_MSG_CHECKING([for pthread_setname_np]) old_CFLAGS=$CFLAGS CFLAGS="$CFLAGS -Werror" AC_TRY_LINK([#define __USE_GNU #include <pthread.h>], [pthread_setname_np(pthread_self(), "name");], pthread_setname=linux) AC_TRY_LINK([#define __USE_GNU #include <pthread.h>], [pthread_set_name_np(pthread_self(), "name");], pthread_setname=bsd) AC_TRY_LINK([#define _DARWIN_C_SOURCE #include <pthread.h>], [pthread_setname_np("name");], pthread_setname=darwin) AC_MSG_RESULT([$pthread_setname]) case $pthread_setname in linux) AC_DEFINE(ETHR_HAVE_PTHREAD_SETNAME_NP_2, 1, [Define if you have linux style pthread_setname_np]);; bsd) AC_DEFINE(ETHR_HAVE_PTHREAD_SET_NAME_NP_2, 1, [Define if you have bsd style pthread_set_name_np]);; darwin) AC_DEFINE(ETHR_HAVE_PTHREAD_SETNAME_NP_1, 1, [Define if you have darwin style pthread_setname_np]);; *) ;; esac pthread_getname=no AC_MSG_CHECKING([for pthread_getname_np]) AC_TRY_LINK([#define __USE_GNU #define _DARWIN_C_SOURCE #include <pthread.h>], [char buff[256]; pthread_getname_np(pthread_self(), buff, 256);], pthread_getname=linux) AC_TRY_LINK([#define __USE_GNU #define _DARWIN_C_SOURCE #include <pthread.h>], [char buff[256]; pthread_getname_np(pthread_self(), buff);], pthread_getname=ibm) AC_MSG_RESULT([$pthread_getname]) case $pthread_getname in linux) AC_DEFINE(ETHR_HAVE_PTHREAD_GETNAME_NP_3, 1, [Define if you have linux style pthread_getname_np]);; ibm) AC_DEFINE(ETHR_HAVE_PTHREAD_GETNAME_NP_2, 1, [Define if you have ibm style pthread_getname_np]);; *) ;; esac CFLAGS=$old_CFLAGS if test "X$disable_native_ethr_impls" = "Xyes"; then ethr_have_native_atomics=no else ETHR_CHK_GCC_ATOMIC_OPS([]) AC_MSG_CHECKING([for a usable libatomic_ops implementation]) case "x$with_libatomic_ops" in xno | xyes | x) libatomic_ops_include= ;; *) if test -d "${with_libatomic_ops}/include"; then libatomic_ops_include="-I$with_libatomic_ops/include" CPPFLAGS="$CPPFLAGS $libatomic_ops_include" else AC_MSG_ERROR([libatomic_ops include directory $with_libatomic_ops/include not found]) fi;; esac ethr_have_libatomic_ops=no AC_TRY_LINK([#include "atomic_ops.h"], [ volatile AO_t x; AO_t y; int z; AO_nop_full(); #if defined(AO_HAVE_store) AO_store(&x, (AO_t) 0); #elif defined(AO_HAVE_store_release) AO_store_release(&x, (AO_t) 0); #else #error No store #endif #if defined(AO_HAVE_load) z = AO_load(&x); #elif defined(AO_HAVE_load_acquire) z = AO_load_acquire(&x); #else #error No load #endif #if defined(AO_HAVE_compare_and_swap_full) z = AO_compare_and_swap_full(&x, (AO_t) 0, (AO_t) 1); #elif defined(AO_HAVE_compare_and_swap_release) z = AO_compare_and_swap_release(&x, (AO_t) 0, (AO_t) 1); #elif defined(AO_HAVE_compare_and_swap_acquire) z = AO_compare_and_swap_acquire(&x, (AO_t) 0, (AO_t) 1); #elif defined(AO_HAVE_compare_and_swap) z = AO_compare_and_swap(&x, (AO_t) 0, (AO_t) 1); #else #error No compare_and_swap #endif ], [ethr_have_native_atomics=yes ethr_native_atomic_implementation=libatomic_ops ethr_have_libatomic_ops=yes]) AC_MSG_RESULT([$ethr_have_libatomic_ops]) if test $ethr_have_libatomic_ops = yes; then AC_CHECK_SIZEOF(AO_t, , [ #include <stdio.h> #include "atomic_ops.h" ]) AC_DEFINE_UNQUOTED(ETHR_SIZEOF_AO_T, $ac_cv_sizeof_AO_t, [Define to the size of AO_t if libatomic_ops is used]) AC_DEFINE(ETHR_HAVE_LIBATOMIC_OPS, 1, [Define if you have libatomic_ops atomic operations]) if test "x$with_libatomic_ops" != "xno" && test "x$with_libatomic_ops" != "x"; then AC_DEFINE(ETHR_PREFER_LIBATOMIC_OPS_NATIVE_IMPLS, 1, [Define if you prefer libatomic_ops native ethread implementations]) fi ETHR_DEFS="$ETHR_DEFS $libatomic_ops_include" elif test "x$with_libatomic_ops" != "xno" && test "x$with_libatomic_ops" != "x"; then AC_MSG_ERROR([No usable libatomic_ops implementation found]) fi case "$host_cpu" in sparc | sun4u | sparc64 | sun4v) case "$with_sparc_memory_order" in "TSO") AC_DEFINE(ETHR_SPARC_TSO, 1, [Define if only run in Sparc TSO mode]);; "PSO") AC_DEFINE(ETHR_SPARC_PSO, 1, [Define if only run in Sparc PSO, or TSO mode]);; "RMO"|"") AC_DEFINE(ETHR_SPARC_RMO, 1, [Define if run in Sparc RMO, PSO, or TSO mode]);; *) AC_MSG_ERROR([Unsupported Sparc memory order: $with_sparc_memory_order]);; esac ethr_native_atomic_implementation=ethread ethr_have_native_atomics=yes;; i86pc | i*86 | x86_64 | amd64) if test "$enable_x86_out_of_order" = "yes"; then AC_DEFINE(ETHR_X86_OUT_OF_ORDER, 1, [Define if x86/x86_64 out of order instructions should be synchronized]) fi ethr_native_atomic_implementation=ethread ethr_have_native_atomics=yes;; macppc | ppc | powerpc | "Power Macintosh") ethr_native_atomic_implementation=ethread ethr_have_native_atomics=yes;; tile) ethr_native_atomic_implementation=ethread ethr_have_native_atomics=yes;; *) ;; esac fi test ethr_have_native_atomics = "yes" && ethr_have_native_spinlock=yes dnl Restore LIBS LIBS=$saved_libs dnl restore CPPFLAGS CPPFLAGS=$saved_cppflags ;; *) ;; esac AC_MSG_CHECKING([whether default stack size should be modified]) if test "x$ethr_modified_default_stack_size" != "x"; then AC_DEFINE_UNQUOTED(ETHR_MODIFIED_DEFAULT_STACK_SIZE, $ethr_modified_default_stack_size, [Define if you want to modify the default stack size]) AC_MSG_RESULT([yes; to $ethr_modified_default_stack_size kilo words]) else AC_MSG_RESULT([no]) fi if test "x$ETHR_THR_LIB_BASE" != "x"; then ETHR_DEFS="-DUSE_THREADS $ETHR_DEFS" ETHR_LIBS="-l$ethr_lib_name -lerts_internal_r $ETHR_X_LIBS" ETHR_LIB_NAME=$ethr_lib_name fi AC_CHECK_SIZEOF(void *) AC_DEFINE_UNQUOTED(ETHR_SIZEOF_PTR, $ac_cv_sizeof_void_p, [Define to the size of pointers]) AC_CHECK_SIZEOF(int) AC_DEFINE_UNQUOTED(ETHR_SIZEOF_INT, $ac_cv_sizeof_int, [Define to the size of int]) AC_CHECK_SIZEOF(long) AC_DEFINE_UNQUOTED(ETHR_SIZEOF_LONG, $ac_cv_sizeof_long, [Define to the size of long]) AC_CHECK_SIZEOF(long long) AC_DEFINE_UNQUOTED(ETHR_SIZEOF_LONG_LONG, $ac_cv_sizeof_long_long, [Define to the size of long long]) AC_CHECK_SIZEOF(__int64) AC_DEFINE_UNQUOTED(ETHR_SIZEOF___INT64, $ac_cv_sizeof___int64, [Define to the size of __int64]) AC_CHECK_SIZEOF(__int128_t) AC_DEFINE_UNQUOTED(ETHR_SIZEOF___INT128_T, $ac_cv_sizeof___int128_t, [Define to the size of __int128_t]) case X$erl_xcomp_bigendian in X) ;; Xyes|Xno) ac_cv_c_bigendian=$erl_xcomp_bigendian;; *) AC_MSG_ERROR([Bad erl_xcomp_bigendian value: $erl_xcomp_bigendian]);; esac AC_C_BIGENDIAN if test "$ac_cv_c_bigendian" = "yes"; then AC_DEFINE(ETHR_BIGENDIAN, 1, [Define if bigendian]) fi case X$erl_xcomp_double_middle_endian in X) ;; Xyes|Xno|Xunknown) ac_cv_c_double_middle_endian=$erl_xcomp_double_middle_endian;; *) AC_MSG_ERROR([Bad erl_xcomp_double_middle_endian value: $erl_xcomp_double_middle_endian]);; esac AC_C_DOUBLE_MIDDLE_ENDIAN ETHR_X86_SSE2_ASM=no case "$GCC-$ac_cv_sizeof_void_p-$host_cpu" in yes-4-i86pc | yes-4-i*86 | yes-4-x86_64 | yes-4-amd64) AC_MSG_CHECKING([for gcc sse2 asm support]) save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -msse2" gcc_sse2_asm=no AC_TRY_COMPILE([], [ long long x, *y; __asm__ __volatile__("movq %1, %0\n\t" : "=x"(x) : "m"(*y) : "memory"); ], [gcc_sse2_asm=yes]) CFLAGS="$save_CFLAGS" AC_MSG_RESULT([$gcc_sse2_asm]) if test "$gcc_sse2_asm" = "yes"; then AC_DEFINE(ETHR_GCC_HAVE_SSE2_ASM_SUPPORT, 1, [Define if you use a gcc that supports -msse2 and understand sse2 specific asm statements]) ETHR_X86_SSE2_ASM=yes fi ;; *) ;; esac case "$GCC-$host_cpu" in yes-i86pc | yes-i*86 | yes-x86_64 | yes-amd64) if test $ac_cv_sizeof_void_p = 4; then dw_cmpxchg="cmpxchg8b" else dw_cmpxchg="cmpxchg16b" fi gcc_dw_cmpxchg_asm=no gcc_pic_dw_cmpxchg_asm=no gcc_cflags_pic=no gcc_cmpxchg8b_pic_no_clobber_ebx=no gcc_cmpxchg8b_pic_no_clobber_ebx_register_shortage=no save_CFLAGS="$CFLAGS" # Check if it works out of the box using passed CFLAGS # and with -fPIC added to CFLAGS if the passed CFLAGS # doesn't trigger position independent code pic_cmpxchg=unknown while true; do case $pic_cmpxchg in yes) pic_text="pic ";; *) pic_text="";; esac AC_MSG_CHECKING([for gcc $pic_text$dw_cmpxchg plain asm support]) plain_cmpxchg=no AC_TRY_COMPILE([], [ char xchgd; long new[2], xchg[2], *p; __asm__ __volatile__( #if ETHR_SIZEOF_PTR == 4 "lock; cmpxchg8b %0\n\t" #else "lock; cmpxchg16b %0\n\t" #endif "setz %3\n\t" : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=q"(xchgd) : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "c"(new[1]), "b"(new[0]) : "cc", "memory"); ], [plain_cmpxchg=yes]) AC_MSG_RESULT([$plain_cmpxchg]) if test $pic_cmpxchg = yes; then gcc_pic_dw_cmpxchg_asm=$plain_cmpxchg break fi gcc_dw_cmpxchg_asm=$plain_cmpxchg # If not already compiling to position independent # code add -fPIC to CFLAGS and do it again. This # since we want also want to know how to compile # to position independent code since this might # cause problems with the use of the EBX register # as input to the asm on 32-bit x86 and old gcc # compilers (gcc vsn < 5). AC_TRY_COMPILE([], [ #if !defined(__PIC__) || !__PIC__ # error no pic #endif ], [pic_cmpxchg=yes gcc_cflags_pic=yes], [pic_cmpxchg=no]) if test $pic_cmpxchg = yes; then gcc_pic_dw_cmpxchg_asm=$gcc_dw_cmpxchg_asm break fi CFLAGS="$save_CFLAGS -fPIC" pic_cmpxchg=yes done if test $gcc_pic_dw_cmpxchg_asm = no && test $ac_cv_sizeof_void_p = 4; then AC_MSG_CHECKING([for gcc pic cmpxchg8b asm support with EBX workaround]) # Check if we can work around it by managing the ebx # register explicitly in the asm... AC_TRY_COMPILE([], [ char xchgd; long new[2], xchg[2], *p; __asm__ __volatile__( "pushl %%ebx\n\t" "movl %8, %%ebx\n\t" "lock; cmpxchg8b %0\n\t" "setz %3\n\t" "popl %%ebx\n\t" : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=q"(xchgd) : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "c"(new[1]), "r"(new[0]) : "cc", "memory"); ], [gcc_pic_dw_cmpxchg_asm=yes gcc_cmpxchg8b_pic_no_clobber_ebx=yes]) AC_MSG_RESULT([$gcc_pic_dw_cmpxchg_asm]) if test $gcc_pic_dw_cmpxchg_asm = no; then AC_MSG_CHECKING([for gcc pic cmpxchg8b asm support with EBX and register shortage workarounds]) # If no optimization is enabled we sometimes get a # register shortage. Check if we can work around # this... AC_TRY_COMPILE([], [ char xchgd; long new[2], xchg[2], *p; __asm__ __volatile__( "pushl %%ebx\n\t" "movl (%7), %%ebx\n\t" "movl 4(%7), %%ecx\n\t" "lock; cmpxchg8b %0\n\t" "setz %3\n\t" "popl %%ebx\n\t" : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=c"(xchgd) : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "r"(new) : "cc", "memory"); ], [gcc_pic_dw_cmpxchg_asm=yes gcc_cmpxchg8b_pic_no_clobber_ebx=yes gcc_cmpxchg8b_pic_no_clobber_ebx_register_shortage=yes]) AC_MSG_RESULT([$gcc_pic_dw_cmpxchg_asm]) fi if test $gcc_cflags_pic = yes; then gcc_dw_cmpxchg_asm=$gcc_pic_dw_cmpxchg_asm fi fi CFLAGS="$save_CFLAGS" if test "$gcc_cmpxchg8b_pic_no_clobber_ebx" = "yes"; then AC_DEFINE(ETHR_CMPXCHG8B_PIC_NO_CLOBBER_EBX, 1, [Define if gcc wont let you clobber ebx with cmpxchg8b and position independent code]) fi if test "$gcc_cmpxchg8b_pic_no_clobber_ebx_register_shortage" = "yes"; then AC_DEFINE(ETHR_CMPXCHG8B_REGISTER_SHORTAGE, 1, [Define if you get a register shortage with cmpxchg8b and position independent code]) fi if test "$gcc_dw_cmpxchg_asm" = "yes"; then AC_DEFINE(ETHR_GCC_HAVE_DW_CMPXCHG_ASM_SUPPORT, 1, [Define if you use a gcc that supports the double word cmpxchg instruction]) fi;; *) ;; esac AC_DEFINE(ETHR_HAVE_ETHREAD_DEFINES, 1, \ [Define if you have all ethread defines]) AC_SUBST(ETHR_X_LIBS) AC_SUBST(ETHR_LIBS) AC_SUBST(ETHR_LIB_NAME) AC_SUBST(ETHR_DEFS) AC_SUBST(ETHR_THR_LIB_BASE) AC_SUBST(ETHR_THR_LIB_BASE_DIR) AC_SUBST(ETHR_X86_SSE2_ASM) ]) dnl ---------------------------------------------------------------------- dnl dnl ERL_TIME_CORRECTION dnl dnl Check for primitives that can be used for implementing dnl erts_os_monotonic_time() and erts_os_system_time() dnl AC_DEFUN(ERL_TIME_CORRECTION, [ AC_ARG_WITH(clock-resolution, AS_HELP_STRING([--with-clock-resolution=high|low|default], [specify wanted clock resolution])) AC_ARG_WITH(clock-gettime-realtime-id, AS_HELP_STRING([--with-clock-gettime-realtime-id=CLOCKID], [specify clock id to use with clock_gettime() for realtime time)])) AC_ARG_WITH(clock-gettime-monotonic-id, AS_HELP_STRING([--with-clock-gettime-monotonic-id=CLOCKID], [specify clock id to use with clock_gettime() for monotonic time)])) AC_ARG_ENABLE(prefer-elapsed-monotonic-time-during-suspend, AS_HELP_STRING([--enable-prefer-elapsed-monotonic-time-during-suspend], [Prefer an OS monotonic time source with elapsed time during suspend]) AS_HELP_STRING([--disable-prefer-elapsed-monotonic-time-during-suspend], [Do not prefer an OS monotonic time source with elapsed time during suspend]), [ case "$enableval" in yes) prefer_elapsed_monotonic_time_during_suspend=yes ;; *) prefer_elapsed_monotonic_time_during_suspend=no ;; esac ], prefer_elapsed_monotonic_time_during_suspend=no) AC_ARG_ENABLE(gettimeofday-as-os-system-time, AS_HELP_STRING([--enable-gettimeofday-as-os-system-time], [Force usage of gettimeofday() for OS system time]), [ case "$enableval" in yes) force_gettimeofday_os_system_time=yes ;; *) force_gettimeofday_os_system_time=no ;; esac ], force_gettimeofday_os_system_time=no) case "$with_clock_resolution" in ""|no|yes) with_clock_resolution=default;; high|low|default) ;; *) AC_MSG_ERROR([Invalid wanted clock resolution: $with_clock_resolution]) ;; esac if test "$force_gettimeofday_os_system_time" = "yes"; then AC_CHECK_FUNCS([gettimeofday]) if test "$ac_cv_func_gettimeofday" = "yes"; then AC_DEFINE(OS_SYSTEM_TIME_GETTIMEOFDAY, [1], [Define if you want to implement erts_os_system_time() using gettimeofday()]) else AC_MSG_ERROR([No gettimeofday() available]) fi else # $force_gettimeofday_os_system_time != yes case "$with_clock_gettime_realtime_id" in ""|no) with_clock_gettime_realtime_id=no ;; CLOCK_*CPUTIME*) AC_MSG_ERROR([Invalid clock_gettime() realtime clock id: Refusing to use the cputime clock id $with_clock_gettime_realtime_id as realtime clock id]) ;; CLOCK_MONOTONIC*|CLOCK_BOOTTIME*|CLOCK_UPTIME*|CLOCK_HIGHRES*) AC_MSG_ERROR([Invalid clock_gettime() realtime clock id: Refusing to use the monotonic clock id $with_clock_gettime_realtime_id as realtime clock id]) ;; CLOCK_*) ;; *) AC_MSG_ERROR([Invalid clock_gettime() clock id: $with_clock_gettime_realtime_id]) ;; esac case "$with_clock_resolution-$with_clock_gettime_realtime_id" in high-no) ERL_WALL_CLOCK(high_resolution);; low-no) ERL_WALL_CLOCK(low_resolution);; default-no) ERL_WALL_CLOCK(default_resolution);; *) ERL_WALL_CLOCK(custom_resolution, $with_clock_gettime_realtime_id);; esac case "$erl_wall_clock_func-$erl_wall_clock_id-$with_clock_gettime_realtime_id" in *-*-no) ;; clock_gettime-$with_clock_gettime_realtime_id-$with_clock_gettime_realtime_id) ;; *) AC_MSG_ERROR([$with_clock_gettime_realtime_id as clock id to clock_gettime() doesn't compile]) ;; esac case $erl_wall_clock_func in none) AC_MSG_ERROR([No wall clock source found]) ;; mach_clock_get_time) AC_DEFINE(OS_SYSTEM_TIME_USING_MACH_CLOCK_GET_TIME, [1], [Define if you want to implement erts_os_system_time() using mach clock_get_time()]) ;; clock_gettime) AC_DEFINE(OS_SYSTEM_TIME_USING_CLOCK_GETTIME, [1], [Define if you want to implement erts_os_system_time() using clock_gettime()]) ;; gettimeofday) AC_DEFINE(OS_SYSTEM_TIME_GETTIMEOFDAY, [1], [Define if you want to implement erts_os_system_time() using gettimeofday()]) ;; *) ;; esac if test "x$erl_wall_clock_id" != "x"; then AC_DEFINE_UNQUOTED(WALL_CLOCK_ID_STR, ["$erl_wall_clock_id"], [Define as a string of wall clock id to use]) AC_DEFINE_UNQUOTED(WALL_CLOCK_ID, [$erl_wall_clock_id], [Define to wall clock id to use]) fi fi # $force_gettimeofday_os_system_time != yes case "$with_clock_gettime_monotonic_id" in ""|no) with_clock_gettime_monotonic_id=no ;; CLOCK_*CPUTIME*) AC_MSG_ERROR([Invalid clock_gettime() monotonic clock id: Refusing to use the cputime clock id $with_clock_gettime_monotonic_id as monotonic clock id]) ;; CLOCK_REALTIME*|CLOCK_TAI*) AC_MSG_ERROR([Invalid clock_gettime() monotonic clock id: Refusing to use the realtime clock id $with_clock_gettime_monotonic_id as monotonic clock id]) ;; CLOCK_*) ;; *) AC_MSG_ERROR([Invalid clock_gettime() clock id: $with_clock_gettime_monotonic_id]) ;; esac case "$with_clock_resolution-$with_clock_gettime_monotonic_id" in high-no) ERL_MONOTONIC_CLOCK(high_resolution, undefined, $prefer_elapsed_monotonic_time_during_suspend);; low-no) ERL_MONOTONIC_CLOCK(low_resolution, undefined, $prefer_elapsed_monotonic_time_during_suspend);; default-no) ERL_MONOTONIC_CLOCK(default_resolution, undefined, $prefer_elapsed_monotonic_time_during_suspend);; *) ERL_MONOTONIC_CLOCK(custom_resolution, $with_clock_gettime_monotonic_id, $prefer_elapsed_monotonic_time_during_suspend);; esac case "$erl_monotonic_clock_func-$erl_monotonic_clock_id-$with_clock_gettime_monotonic_id" in *-*-no) ;; clock_gettime-$with_clock_gettime_monotonic_id-$with_clock_gettime_monotonic_id) ;; *) AC_MSG_ERROR([$with_clock_gettime_monotonic_id as clock id to clock_gettime() doesn't compile]) ;; esac case $erl_monotonic_clock_func in times) AC_DEFINE(OS_MONOTONIC_TIME_USING_TIMES, [1], [Define if you want to implement erts_os_monotonic_time() using times()]) ;; mach_clock_get_time) AC_DEFINE(OS_MONOTONIC_TIME_USING_MACH_CLOCK_GET_TIME, [1], [Define if you want to implement erts_os_monotonic_time() using mach clock_get_time()]) ;; clock_gettime) AC_DEFINE(OS_MONOTONIC_TIME_USING_CLOCK_GETTIME, [1], [Define if you want to implement erts_os_monotonic_time() using clock_gettime()]) ;; gethrtime) AC_DEFINE(OS_MONOTONIC_TIME_USING_GETHRTIME, [1], [Define if you want to implement erts_os_monotonic_time() using gethrtime()]) ;; *) ;; esac if test $erl_corrected_monotonic_clock = yes; then AC_DEFINE(ERTS_HAVE_CORRECTED_OS_MONOTONIC_TIME, [1], [Define if OS monotonic clock is corrected]) fi if test $erl_monotonic_clock_low_resolution = yes; then AC_DEFINE(ERTS_HAVE_LOW_RESOLUTION_OS_MONOTONIC_LOW, [1], [Define if you have a low resolution OS monotonic clock]) fi xrtlib="$erl_monotonic_clock_lib" if test "x$erl_monotonic_clock_id" != "x"; then AC_DEFINE_UNQUOTED(MONOTONIC_CLOCK_ID_STR, ["$erl_monotonic_clock_id"], [Define as a string of monotonic clock id to use]) AC_DEFINE_UNQUOTED(MONOTONIC_CLOCK_ID, [$erl_monotonic_clock_id], [Define to monotonic clock id to use]) fi if test $erl_cv_clock_gettime_monotonic_raw = yes; then AC_DEFINE(HAVE_CLOCK_GETTIME_MONOTONIC_RAW, [1], [Define if you have clock_gettime(CLOCK_MONOTONIC_RAW, _)]) fi ERL_MONOTONIC_CLOCK(high_resolution, undefined, no) case $$erl_monotonic_clock_low_resolution-$erl_monotonic_clock_func in no-mach_clock_get_time) monotonic_hrtime=yes AC_DEFINE(SYS_HRTIME_USING_MACH_CLOCK_GET_TIME, [1], [Define if you want to implement erts_os_hrtime() using mach clock_get_time()]) ;; no-clock_gettime) monotonic_hrtime=yes AC_DEFINE(SYS_HRTIME_USING_CLOCK_GETTIME, [1], [Define if you want to implement erts_os_hrtime() using clock_gettime()]) ;; no-gethrtime) monotonic_hrtime=yes AC_DEFINE(SYS_HRTIME_USING_GETHRTIME, [1], [Define if you want to implement erts_os_hrtime() using gethrtime()]) ;; *) monotonic_hrtime=no ;; esac if test $monotonic_hrtime = yes; then AC_DEFINE(HAVE_MONOTONIC_ERTS_SYS_HRTIME, [1], [Define if you have a monotonic erts_os_hrtime() implementation]) fi if test "x$erl_monotonic_clock_id" != "x"; then AC_DEFINE_UNQUOTED(HRTIME_CLOCK_ID_STR, ["$erl_monotonic_clock_id"], [Define as a string of monotonic clock id to use]) AC_DEFINE_UNQUOTED(HRTIME_CLOCK_ID, [$erl_monotonic_clock_id], [Define to monotonic clock id to use]) fi dnl dnl Check if gethrvtime is working, and if to use procfs ioctl dnl or (yet to be written) write to the procfs ctl file. dnl AC_MSG_CHECKING([if gethrvtime works and how to use it]) AC_TRY_RUN([ /* gethrvtime procfs ioctl test */ /* These need to be undef:ed to not break activation of * micro level process accounting on /proc/self */ #ifdef _LARGEFILE_SOURCE # undef _LARGEFILE_SOURCE #endif #ifdef _FILE_OFFSET_BITS # undef _FILE_OFFSET_BITS #endif #include <stdlib.h> #include <unistd.h> #include <string.h> #include <stdio.h> #include <sys/time.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/signal.h> #include <sys/fault.h> #include <sys/syscall.h> #include <sys/procfs.h> #include <fcntl.h> int main() { long msacct = PR_MSACCT; int fd; long long start, stop; int i; pid_t pid = getpid(); char proc_self[30] = "/proc/"; sprintf(proc_self+strlen(proc_self), "%lu", (unsigned long) pid); if ( (fd = open(proc_self, O_WRONLY)) == -1) exit(1); if (ioctl(fd, PIOCSET, &msacct) < 0) exit(2); if (close(fd) < 0) exit(3); start = gethrvtime(); for (i = 0; i < 100; i++) stop = gethrvtime(); if (start == 0) exit(4); if (start == stop) exit(5); exit(0); return 0; } ], erl_gethrvtime=procfs_ioctl, erl_gethrvtime=false, [ case X$erl_xcomp_gethrvtime_procfs_ioctl in X) erl_gethrvtime=cross;; Xyes|Xno) if test $erl_xcomp_gethrvtime_procfs_ioctl = yes; then erl_gethrvtime=procfs_ioctl else erl_gethrvtime=false fi;; *) AC_MSG_ERROR([Bad erl_xcomp_gethrvtime_procfs_ioctl value: $erl_xcomp_gethrvtime_procfs_ioctl]);; esac ]) LIBRT=$xrtlib case $erl_gethrvtime in procfs_ioctl) AC_DEFINE(HAVE_GETHRVTIME_PROCFS_IOCTL,[1], [define if gethrvtime() works and uses ioctl() to /proc/self]) AC_MSG_RESULT(uses ioctl to procfs) ;; *) if test $erl_gethrvtime = cross; then erl_gethrvtime=false AC_MSG_RESULT(cross) AC_MSG_WARN([result 'not working' guessed because of cross compilation]) else AC_MSG_RESULT(not working) fi dnl dnl Check if clock_gettime (linux) is working dnl AC_MSG_CHECKING([if clock_gettime can be used to get process CPU time]) save_libs=$LIBS LIBS="-lrt" AC_TRY_RUN([ #include <stdlib.h> #include <unistd.h> #include <string.h> #include <stdio.h> #include <time.h> int main() { long long start, stop; int i; struct timespec tp; if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tp) < 0) exit(1); start = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec; for (i = 0; i < 100; i++) clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &tp); stop = ((long long)tp.tv_sec * 1000000000LL) + (long long)tp.tv_nsec; if (start == 0) exit(4); if (start == stop) exit(5); exit(0); return 0; } ], erl_clock_gettime_cpu_time=yes, erl_clock_gettime_cpu_time=no, [ case X$erl_xcomp_clock_gettime_cpu_time in X) erl_clock_gettime_cpu_time=cross;; Xyes|Xno) erl_clock_gettime_cpu_time=$erl_xcomp_clock_gettime_cpu_time;; *) AC_MSG_ERROR([Bad erl_xcomp_clock_gettime_cpu_time value: $erl_xcomp_clock_gettime_cpu_time]);; esac ]) LIBS=$save_libs AC_MSG_RESULT($erl_clock_gettime_cpu_time) case $erl_clock_gettime_cpu_time in yes) AC_DEFINE(HAVE_CLOCK_GETTIME_CPU_TIME,[], [define if clock_gettime() works for getting process time]) LIBRT=-lrt ;; cross) erl_clock_gettime_cpu_time=no AC_MSG_WARN([result no guessed because of cross compilation]) ;; *) ;; esac ;; esac AC_SUBST(LIBRT) ])dnl dnl ---------------------------------------------------------------------- dnl dnl LM_TRY_ENABLE_CFLAG dnl dnl dnl Tries a CFLAG and sees if it can be enabled without compiler errors dnl $1: textual cflag to add dnl $2: variable to store the modified CFLAG in dnl Usage example LM_TRY_ENABLE_CFLAG([-Werror=return-type], [CFLAGS]) dnl dnl AC_DEFUN([LM_TRY_ENABLE_CFLAG], [ AC_MSG_CHECKING([if we can add $1 to $2 (via CFLAGS)]) saved_CFLAGS=$CFLAGS; CFLAGS="$1 $$2"; AC_TRY_COMPILE([],[return 0;],can_enable_flag=true,can_enable_flag=false) CFLAGS=$saved_CFLAGS; if test "X$can_enable_flag" = "Xtrue"; then AC_MSG_RESULT([yes]) AS_VAR_SET($2, "$1 $$2") else AC_MSG_RESULT([no]) fi ]) dnl ERL_TRY_LINK_JAVA(CLASSES, FUNCTION-BODY dnl [ACTION_IF_FOUND [, ACTION-IF-NOT-FOUND]]) dnl Freely inspired by AC_TRY_LINK. (Maybe better to create a dnl AC_LANG_JAVA instead...) AC_DEFUN(ERL_TRY_LINK_JAVA, [java_link='$JAVAC conftest.java 1>&AC_FD_CC' changequote(, )dnl cat > conftest.java <<EOF $1 class conftest { public static void main(String[] args) { $2 ; return; }} EOF changequote([, ])dnl if AC_TRY_EVAL(java_link) && test -s conftest.class; then ifelse([$3], , :, [rm -rf conftest* $3]) else echo "configure: failed program was:" 1>&AC_FD_CC cat conftest.java 1>&AC_FD_CC echo "configure: PATH was $PATH" 1>&AC_FD_CC ifelse([$4], , , [ rm -rf conftest* $4 ])dnl fi rm -f conftest*]) #define UNSAFE_MASK 0xc0000000 /* Mask for bits that must be constant */