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Diffstat (limited to 'aclocal.m4')
| -rw-r--r--[l---------] | aclocal.m4 | 1760 |
1 files changed, 1759 insertions, 1 deletions
diff --git a/aclocal.m4 b/aclocal.m4 index 32ceb26f5a..a7a8ceb99a 120000..100644 --- a/aclocal.m4 +++ b/aclocal.m4 @@ -1 +1,1759 @@ -erts/aclocal.m4
\ No newline at end of file +dnl +dnl %CopyrightBegin% +dnl +dnl Copyright Ericsson AB 1998-2011. 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_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/i686-pc-msys-gcc.exe; 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$MIXED_MSYS" = "Xyes" ; then + AC_MSG_RESULT([yes]) +else + AC_MSG_RESULT([no]) +fi + +AC_SUBST(MIXED_MSYS) +]) + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_FIND_EMU_CC +dnl +dnl +dnl Tries fairly hard to find a C compiler that can handle jump tables. +dnl Defines the @EMU_CC@ variable for the makefiles and +dnl inserts NO_JUMP_TABLE in the header if one cannot be found... +dnl + +AC_DEFUN(LM_FIND_EMU_CC, + [AC_CACHE_CHECK(for a compiler that handles jumptables, + ac_cv_prog_emu_cc, + [ +AC_TRY_COMPILE([],[ +#ifdef __llvm__ +#error "llvm is currently unable to compile beam_emu.c" +#endif + __label__ lbl1; + __label__ lbl2; + int x = magic(); + static void *jtab[2]; + + jtab[0] = &&lbl1; + jtab[1] = &&lbl2; + goto *jtab[x]; +lbl1: + return 1; +lbl2: + return 2; +],ac_cv_prog_emu_cc=$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=$ac_cv_prog_emu_cc + CFLAGS="" + CPPFLAGS="" + AC_TRY_COMPILE([],[ + __label__ lbl1; + __label__ lbl2; + int x = magic(); + static void *jtab[2]; + + jtab[0] = &&lbl1; + jtab[1] = &&lbl2; + goto *jtab[x]; + lbl1: + return 1; + lbl2: + return 2; + ],ac_cv_prog_emu_cc=$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], , , [$5 +])dnl +fi +]) + + +dnl ---------------------------------------------------------------------- +dnl +dnl LM_CHECK_THR_LIB +dnl +dnl This macro may be used by any OTP application. +dnl +dnl LM_CHECK_THR_LIB sets THR_LIBS, THR_DEFS, and THR_LIB_NAME. It also +dnl checks for some pthread headers which will appear in DEFS or config.h. +dnl + +AC_DEFUN(LM_CHECK_THR_LIB, +[ + +NEED_NPTL_PTHREAD_H=no + +dnl win32? +AC_MSG_CHECKING([for native win32 threads]) +if test "X$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 FreeBSD has pthreads in special c library, c_r... + if test "x$THR_LIBS" = "x"; then + AC_CHECK_LIB(c_r, pthread_create, THR_LIBS="-lc_r") + fi + +dnl On ofs1 the '-pthread' switch should be used + if test "x$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 + 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 + +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 */ + + |