dnl dnl %CopyrightBegin% dnl dnl Copyright Ericsson AB 1998-2012. All Rights Reserved. dnl dnl The contents of this file are subject to the Erlang Public License, dnl Version 1.1, (the "License"); you may not use this file except in dnl compliance with the License. You should have received a copy of the dnl Erlang Public License along with this software. If not, it can be dnl retrieved online at http://www.erlang.org/. dnl dnl Software distributed under the License is distributed on an "AS IS" dnl basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See dnl the License for the specific language governing rights and limitations dnl 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_clock_gettime_correction, [clock_gettime() can be used for time correction: 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$GCC" != "xyes"; then if test -x /usr/bin/cygpath; then CFLAGS="-O2" MIXED_CYGWIN=yes AC_MSG_RESULT([Cygwin and VC]) MIXED_CYGWIN_VC=yes CPPFLAGS="$CPPFLAGS -DERTS_MIXED_CYGWIN_VC" elif test -x /usr/bin/msysinfo; then CFLAGS="-O2" MIXED_MSYS=yes AC_MSG_RESULT([MSYS and VC]) MIXED_MSYS_VC=yes CPPFLAGS="$CPPFLAGS -DERTS_MIXED_MSYS_VC" else AC_MSG_RESULT([undeterminable]) AC_MSG_ERROR(Seems to be mixed windows but not with cygwin, cannot handle this!) fi else AC_MSG_RESULT([no]) MIXED_CYGWIN_VC=no MIXED_MSYS_VC=no fi AC_SUBST(MIXED_CYGWIN_VC) AC_SUBST(MIXED_MSYS_VC) MIXED_VC=no if test "x$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([$3], [AC_MSG_WARN([unknown double endianness presetting ac_cv_c_double_middle_endian=no (or yes) will help])]) ;; esac ])# AC_C_DOUBLE_MIDDLE_ENDIAN dnl ---------------------------------------------------------------------- dnl dnl LM_CHECK_THR_LIB dnl dnl This macro may be used by any OTP application. dnl dnl LM_CHECK_THR_LIB sets THR_LIBS, THR_DEFS, and THR_LIB_NAME. It also dnl checks for some pthread headers which will appear in DEFS or config.h. dnl AC_DEFUN(LM_CHECK_THR_LIB, [ NEED_NPTL_PTHREAD_H=no dnl win32? AC_MSG_CHECKING([for native win32 threads]) if test "X$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_SYNC_OP, [ AC_MSG_CHECKING([for $3-bit $1()]) case "$2" in "1") sync_call="$1(&var);";; "2") sync_call="$1(&var, ($4) 0);";; "3") sync_call="$1(&var, ($4) 0, ($4) 0);";; esac have_sync_op=no AC_TRY_LINK([], [ $4 res; volatile $4 var; res = $sync_call ], [have_sync_op=yes]) test $have_sync_op = yes && $5 AC_MSG_RESULT([$have_sync_op]) ]) 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, [ LM_CHECK_THR_LIB ERL_INTERNAL_LIBS 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 $ERTS_INTERNAL_X_LIBS" ETHR_LIBS= ETHR_LIB_NAME= ethr_modified_default_stack_size= dnl Name of lib where ethread implementation is located ethr_lib_name=ethread case "$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 $found_win32_winnt = no; then AC_MSG_ERROR([-D_WIN32_WINNT missing in CPPFLAGS]) fi AC_DEFINE(ETHR_WIN32_THREADS, 1, [Define if you have win32 threads]) ETHR_CHK_INTERLOCKED([_InterlockedDecrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT, 1, [Define if you have _InterlockedDecrement()])) ETHR_CHK_INTERLOCKED([_InterlockedDecrement_rel], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDDECREMENT_REL, 1, [Define if you have _InterlockedDecrement_rel()])) ETHR_CHK_INTERLOCKED([_InterlockedIncrement], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT, 1, [Define if you have _InterlockedIncrement()])) ETHR_CHK_INTERLOCKED([_InterlockedIncrement_acq], [1], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDINCREMENT_ACQ, 1, [Define if you have _InterlockedIncrement_acq()])) ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD, 1, [Define if you have _InterlockedExchangeAdd()])) ETHR_CHK_INTERLOCKED([_InterlockedExchangeAdd_acq], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGEADD_ACQ, 1, [Define if you have _InterlockedExchangeAdd_acq()])) ETHR_CHK_INTERLOCKED([_InterlockedAnd], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDAND, 1, [Define if you have _InterlockedAnd()])) ETHR_CHK_INTERLOCKED([_InterlockedOr], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDOR, 1, [Define if you have _InterlockedOr()])) ETHR_CHK_INTERLOCKED([_InterlockedExchange], [2], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDEXCHANGE, 1, [Define if you have _InterlockedExchange()])) ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange], [3], [long], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE, 1, [Define if you have _InterlockedCompareExchange()])) test "$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 "$have_interlocked_op" = "yes" && ethr_have_native_atomics=yes ETHR_CHK_INTERLOCKED([_InterlockedCompareExchange128], [4], [__int64], AC_DEFINE_UNQUOTED(ETHR_HAVE__INTERLOCKEDCOMPAREEXCHANGE128, 1, [Define if you have _InterlockedCompareExchange128()])) test "$ethr_have_native_atomics" = "yes" && ethr_have_native_spinlock=yes ;; 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 $have_pthread_rwlock_init = yes; then AC_MSG_WARN([Forced usage of pthread rwlocks. Note that this implementation may suffer from starvation issues.]) else AC_MSG_ERROR([User forced usage of pthread rwlock, but no such implementation was found]) fi fi AC_CHECK_FUNC(pthread_attr_setguardsize, \ AC_DEFINE(ETHR_HAVE_PTHREAD_ATTR_SETGUARDSIZE, 1, \ [Define if you have the pthread_attr_setguardsize function.])) linux_futex=no AC_MSG_CHECKING([for Linux futexes]) AC_TRY_LINK([ #include <sys/syscall.h> #include <unistd.h> #include <linux/futex.h> #include <sys/time.h> ], [ int i = 1; syscall(__NR_futex, (void *) &i, FUTEX_WAKE, 1, (void*)0,(void*)0, 0); syscall(__NR_futex, (void *) &i, FUTEX_WAIT, 0, (void*)0,(void*)0, 0); return 0; ], linux_futex=yes) AC_MSG_RESULT([$linux_futex]) test $linux_futex = yes && AC_DEFINE(ETHR_HAVE_LINUX_FUTEX, 1, [Define if you have a linux futex implementation.]) AC_CHECK_SIZEOF(int) AC_CHECK_SIZEOF(long) AC_CHECK_SIZEOF(long long) AC_CHECK_SIZEOF(__int128_t) if test "$ac_cv_sizeof_int" = "4"; then int32="int" elif test "$ac_cv_sizeof_long" = "4"; then int32="long" elif test "$ac_cv_sizeof_long_long" = "4"; then int32="long long" else AC_MSG_ERROR([No 32-bit type found]) fi if test "$ac_cv_sizeof_int" = "8"; then int64="int" elif test "$ac_cv_sizeof_long" = "8"; then int64="long" elif test "$ac_cv_sizeof_long_long" = "8"; then int64="long long" else AC_MSG_ERROR([No 64-bit type found]) fi int128=no if test "$ac_cv_sizeof___int128_t" = "16"; then int128="__int128_t" fi ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP32, 1, [Define if you have __sync_val_compare_and_swap() for 32-bit integers])) test "$have_sync_op" = "yes" && ethr_have_native_atomics=yes ETHR_CHK_SYNC_OP([__sync_add_and_fetch], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_ADD_AND_FETCH32, 1, [Define if you have __sync_add_and_fetch() for 32-bit integers])) ETHR_CHK_SYNC_OP([__sync_fetch_and_and], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_AND32, 1, [Define if you have __sync_fetch_and_and() for 32-bit integers])) ETHR_CHK_SYNC_OP([__sync_fetch_and_or], [2], [32], [$int32], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_OR32, 1, [Define if you have __sync_fetch_and_or() for 32-bit integers])) ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP64, 1, [Define if you have __sync_val_compare_and_swap() for 64-bit integers])) test "$have_sync_op" = "yes" && ethr_have_native_atomics=yes ETHR_CHK_SYNC_OP([__sync_add_and_fetch], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_ADD_AND_FETCH64, 1, [Define if you have __sync_add_and_fetch() for 64-bit integers])) ETHR_CHK_SYNC_OP([__sync_fetch_and_and], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_AND64, 1, [Define if you have __sync_fetch_and_and() for 64-bit integers])) ETHR_CHK_SYNC_OP([__sync_fetch_and_or], [2], [64], [$int64], AC_DEFINE(ETHR_HAVE___SYNC_FETCH_AND_OR64, 1, [Define if you have __sync_fetch_and_or() for 64-bit integers])) if test $int128 != no; then ETHR_CHK_SYNC_OP([__sync_val_compare_and_swap], [3], [128], [$int128], AC_DEFINE(ETHR_HAVE___SYNC_VAL_COMPARE_AND_SWAP128, 1, [Define if you have __sync_val_compare_and_swap() for 128-bit integers])) fi 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 $with_libatomic_ops/include not found]) fi;; esac ethr_have_libatomic_ops=no AC_TRY_LINK([#include "atomic_ops.h"], [ volatile AO_t x; AO_t y; int z; AO_nop_full(); AO_store(&x, (AO_t) 0); z = AO_load(&x); z = AO_compare_and_swap_full(&x, (AO_t) 0, (AO_t) 1); ], [ethr_have_native_atomics=yes ethr_have_libatomic_ops=yes]) AC_MSG_RESULT([$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: $with_sparc_memory_order]);; esac ethr_have_native_atomics=yes;; i86pc | i*86 | x86_64 | amd64) if test "$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_have_native_atomics=yes;; macppc | ppc | "Power Macintosh") ethr_have_native_atomics=yes;; tile) ethr_have_native_atomics=yes;; *) ;; esac 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: $erl_xcomp_double_middle_endian]);; esac AC_C_DOUBLE_MIDDLE_ENDIAN AC_ARG_ENABLE(native-ethr-impls, AS_HELP_STRING([--disable-native-ethr-impls], [disable native ethread implementations]), [ case "$enableval" in no) disable_native_ethr_impls=yes ;; *) disable_native_ethr_impls=no ;; esac ], disable_native_ethr_impls=no) 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)])) test "X$disable_native_ethr_impls" = "Xyes" && AC_DEFINE(ETHR_DISABLE_NATIVE_IMPLS, 1, [Define if you want to disable native ethread implementations]) AC_ARG_ENABLE(prefer-gcc-native-ethr-impls, AS_HELP_STRING([--enable-prefer-gcc-native-ethr-impls], [prefer gcc native ethread implementations]), [ case "$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 $enable_prefer_gcc_native_ethr_impls = yes && AC_DEFINE(ETHR_PREFER_GCC_NATIVE_IMPLS, 1, [Define if you prefer gcc native ethread implementations]) AC_ARG_WITH(libatomic_ops, AS_HELP_STRING([--with-libatomic_ops=PATH], [specify and prefer usage of libatomic_ops in the ethread library])) AC_ARG_WITH(with_sparc_memory_order, AS_HELP_STRING([--with-sparc-memory-order=TSO|PSO|RMO], [specify sparc memory order (defaults to RMO)])) ETHR_X86_SSE2_ASM=no case "$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) gcc_dw_cmpxchg_asm=no AC_MSG_CHECKING([for gcc double word cmpxchg asm support]) AC_TRY_COMPILE([], [ char xchgd; long new[2], xchg[2], *p; __asm__ __volatile__( #if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__ "pushl %%ebx\n\t" "movl %8, %%ebx\n\t" #endif #if ETHR_SIZEOF_PTR == 4 "lock; cmpxchg8b %0\n\t" #else "lock; cmpxchg16b %0\n\t" #endif "setz %3\n\t" #if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__ "popl %%ebx\n\t" #endif : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=c"(xchgd) : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "3"(new[1]), #if ETHR_SIZEOF_PTR == 4 && defined(__PIC__) && __PIC__ "r"(new[0]) #else "b"(new[0]) #endif : "cc", "memory"); ], [gcc_dw_cmpxchg_asm=yes]) if test $gcc_dw_cmpxchg_asm = no && test $ac_cv_sizeof_void_p = 4; then AC_TRY_COMPILE([], [ char xchgd; long new[2], xchg[2], *p; #if !defined(__PIC__) || !__PIC__ # error nope #endif __asm__ __volatile__( "pushl %%ebx\n\t" "movl (%7), %%ebx\n\t" "movl 4(%7), %%ecx\n\t" "lock; cmpxchg8b %0\n\t" "setz %3\n\t" "popl %%ebx\n\t" : "=m"(*p), "=d"(xchg[1]), "=a"(xchg[0]), "=c"(xchgd) : "m"(*p), "1"(xchg[1]), "2"(xchg[0]), "3"(new) : "cc", "memory"); ], [gcc_dw_cmpxchg_asm=yes]) if test "$gcc_dw_cmpxchg_asm" = "yes"; then AC_DEFINE(ETHR_CMPXCHG8B_REGISTER_SHORTAGE, 1, [Define if you get a register shortage with cmpxchg8b and position independent code]) fi fi AC_MSG_RESULT([$gcc_dw_cmpxchg_asm]) if test "$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 In the presence of a high resolution realtime timer Erlang can adapt dnl its view of time relative to this timer. On solaris such a timer is dnl available with the syscall gethrtime(). On other OS's a fallback dnl solution using times() is implemented. (However on e.g. FreeBSD times() dnl is implemented using gettimeofday so it doesn't make much sense to dnl use it there...) On second thought, it seems to be safer to do it the dnl other way around. I.e. only use times() on OS's where we know it will dnl work... dnl AC_DEFUN(ERL_TIME_CORRECTION, [if test x$ac_cv_func_gethrtime = x; then AC_CHECK_FUNC(gethrtime) fi if test x$clock_gettime_correction = xunknown; then AC_TRY_COMPILE([#include <time.h>], [struct timespec ts; long long result; clock_gettime(CLOCK_MONOTONIC,&ts); result = ((long long) ts.tv_sec) * 1000000000LL + ((long long) ts.tv_nsec);], clock_gettime_compiles=yes, clock_gettime_compiles=no) else clock_gettime_compiles=no fi AC_CACHE_CHECK([how to correct for time adjustments], erl_cv_time_correction, [ case $clock_gettime_correction in yes) erl_cv_time_correction=clock_gettime;; no|unknown) case $ac_cv_func_gethrtime in yes) erl_cv_time_correction=hrtime ;; no) case $host_os in linux*) case $clock_gettime_correction in unknown) if test x$clock_gettime_compiles = xyes; then if test X$cross_compiling != Xyes; then linux_kernel_vsn_=`uname -r` case $linux_kernel_vsn_ in [[0-1]].*|2.[[0-5]]|2.[[0-5]].*) erl_cv_time_correction=times ;; *) erl_cv_time_correction=clock_gettime;; esac else case X$erl_xcomp_linux_clock_gettime_correction in X) erl_cv_time_correction=cross;; Xyes|Xno) if test $erl_xcomp_linux_clock_gettime_correction = yes; then erl_cv_time_correction=clock_gettime else erl_cv_time_correction=times fi;; *) AC_MSG_ERROR([Bad erl_xcomp_linux_clock_gettime_correction value: $erl_xcomp_linux_clock_gettime_correction]);; esac fi else erl_cv_time_correction=times fi ;; *) erl_cv_time_correction=times ;; esac ;; *) erl_cv_time_correction=none ;; esac ;; esac ;; esac ]) xrtlib="" case $erl_cv_time_correction in times) AC_DEFINE(CORRECT_USING_TIMES,[], [Define if you do not have a high-res. timer & want to use times() instead]) ;; clock_gettime|cross) if test $erl_cv_time_correction = cross; then erl_cv_time_correction=clock_gettime AC_MSG_WARN([result clock_gettime guessed because of cross compilation]) fi xrtlib="-lrt" AC_DEFINE(GETHRTIME_WITH_CLOCK_GETTIME,[1], [Define if you want to use clock_gettime to simulate gethrtime]) ;; esac dnl dnl Check if gethrvtime is working, and if to use procfs ioctl dnl or (yet to be written) write to the procfs ctl file. dnl AC_MSG_CHECKING([if gethrvtime works and how to use it]) AC_TRY_RUN([ /* gethrvtime procfs ioctl test */ /* These need to be undef:ed to not break activation of * micro level process accounting on /proc/self */ #ifdef _LARGEFILE_SOURCE # undef _LARGEFILE_SOURCE #endif #ifdef _FILE_OFFSET_BITS # undef _FILE_OFFSET_BITS #endif #include <stdlib.h> #include <unistd.h> #include <string.h> #include <stdio.h> #include <sys/time.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/signal.h> #include <sys/fault.h> #include <sys/syscall.h> #include <sys/procfs.h> #include <fcntl.h> int main() { long msacct = PR_MSACCT; int fd; long long start, stop; int i; pid_t pid = getpid(); char proc_self[30] = "/proc/"; sprintf(proc_self+strlen(proc_self), "%lu", (unsigned long) pid); if ( (fd = open(proc_self, O_WRONLY)) == -1) exit(1); if (ioctl(fd, PIOCSET, &msacct) < 0) exit(2); if (close(fd) < 0) exit(3); start = gethrvtime(); for (i = 0; i < 100; i++) stop = gethrvtime(); if (start == 0) exit(4); if (start == stop) exit(5); exit(0); return 0; } ], erl_gethrvtime=procfs_ioctl, erl_gethrvtime=false, [ case X$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 ]) 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=yes, erl_clock_gettime=no, [ case X$erl_xcomp_clock_gettime_cpu_time in X) erl_clock_gettime=cross;; Xyes|Xno) erl_clock_gettime=$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 case $host_os in linux*) AC_MSG_RESULT([no; not stable]) LIBRT=$xrtlib ;; *) AC_MSG_RESULT($erl_clock_gettime) case $erl_clock_gettime in yes) AC_DEFINE(HAVE_CLOCK_GETTIME,[], [define if clock_gettime() works for getting process time]) LIBRT=-lrt ;; cross) erl_clock_gettime=no AC_MSG_WARN([result no guessed because of cross compilation]) LIBRT=$xrtlib ;; *) LIBRT=$xrtlib ;; esac ;; esac AC_SUBST(LIBRT) ;; esac ])dnl dnl ERL_TRY_LINK_JAVA(CLASSES, FUNCTION-BODY dnl [ACTION_IF_FOUND [, ACTION-IF-NOT-FOUND]]) dnl Freely inspired by AC_TRY_LINK. (Maybe better to create a dnl AC_LANG_JAVA instead...) AC_DEFUN(ERL_TRY_LINK_JAVA, [java_link='$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 */