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Diffstat (limited to 'common/acx_pthread.m4')
| -rw-r--r-- | common/acx_pthread.m4 | 348 |
1 files changed, 0 insertions, 348 deletions
diff --git a/common/acx_pthread.m4 b/common/acx_pthread.m4 deleted file mode 100644 index dcf6332..0000000 --- a/common/acx_pthread.m4 +++ /dev/null @@ -1,348 +0,0 @@ -dnl @synopsis ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) -dnl -dnl @summary figure out how to build C programs using POSIX threads -dnl -dnl This macro figures out how to build C programs using POSIX threads. -dnl It sets the PTHREAD_LIBS output variable to the threads library and -dnl linker flags, and the PTHREAD_CFLAGS output variable to any special -dnl C compiler flags that are needed. (The user can also force certain -dnl compiler flags/libs to be tested by setting these environment -dnl variables.) -dnl -dnl Also sets PTHREAD_CC to any special C compiler that is needed for -dnl multi-threaded programs (defaults to the value of CC otherwise). -dnl (This is necessary on AIX to use the special cc_r compiler alias.) -dnl -dnl NOTE: You are assumed to not only compile your program with these -dnl flags, but also link it with them as well. e.g. you should link -dnl with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS -dnl $LIBS -dnl -dnl If you are only building threads programs, you may wish to use -dnl these variables in your default LIBS, CFLAGS, and CC: -dnl -dnl LIBS="$PTHREAD_LIBS $LIBS" -dnl CFLAGS="$CFLAGS $PTHREAD_CFLAGS" -dnl CC="$PTHREAD_CC" -dnl -dnl In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute -dnl constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to -dnl that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX). -dnl -dnl ACTION-IF-FOUND is a list of shell commands to run if a threads -dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to -dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the -dnl default action will define HAVE_PTHREAD. -dnl -dnl Please let the authors know if this macro fails on any platform, or -dnl if you have any other suggestions or comments. This macro was based -dnl on work by SGJ on autoconf scripts for FFTW (www.fftw.org) (with -dnl help from M. Frigo), as well as ac_pthread and hb_pthread macros -dnl posted by Alejandro Forero Cuervo to the autoconf macro repository. -dnl We are also grateful for the helpful feedback of numerous users. -dnl -dnl @category InstalledPackages -dnl @author Steven G. Johnson <stevenj@alum.mit.edu> -dnl @version 2006-05-29 -dnl @license GPLWithACException -dnl -dnl Checks for GCC shared/pthread inconsistency based on work by -dnl Marcin Owsiany <marcin@owsiany.pl> - - -AC_DEFUN([ACX_PTHREAD], [ -AC_REQUIRE([AC_CANONICAL_HOST]) -AC_LANG_SAVE -AC_LANG_C -acx_pthread_ok=no - -# We used to check for pthread.h first, but this fails if pthread.h -# requires special compiler flags (e.g. on True64 or Sequent). -# It gets checked for in the link test anyway. - -# First of all, check if the user has set any of the PTHREAD_LIBS, -# etcetera environment variables, and if threads linking works using -# them: -if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then - save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS $PTHREAD_CFLAGS" - save_LIBS="$LIBS" - LIBS="$PTHREAD_LIBS $LIBS" - AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS]) - AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes) - AC_MSG_RESULT($acx_pthread_ok) - if test x"$acx_pthread_ok" = xno; then - PTHREAD_LIBS="" - PTHREAD_CFLAGS="" - fi - LIBS="$save_LIBS" - CFLAGS="$save_CFLAGS" -fi - -# We must check for the threads library under a number of different -# names; the ordering is very important because some systems -# (e.g. DEC) have both -lpthread and -lpthreads, where one of the -# libraries is broken (non-POSIX). - -# Create a list of thread flags to try. Items starting with a "-" are -# C compiler flags, and other items are library names, except for "none" -# which indicates that we try without any flags at all, and "pthread-config" -# which is a program returning the flags for the Pth emulation library. - -acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config" - -# The ordering *is* (sometimes) important. Some notes on the -# individual items follow: - -# pthreads: AIX (must check this before -lpthread) -# none: in case threads are in libc; should be tried before -Kthread and -# other compiler flags to prevent continual compiler warnings -# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) -# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) -# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) -# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads) -# -pthreads: Solaris/gcc -# -mthreads: Mingw32/gcc, Lynx/gcc -# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it -# doesn't hurt to check since this sometimes defines pthreads too; -# also defines -D_REENTRANT) -# ... -mt is also the pthreads flag for HP/aCC -# pthread: Linux, etcetera -# --thread-safe: KAI C++ -# pthread-config: use pthread-config program (for GNU Pth library) - -case "${host_cpu}-${host_os}" in - *solaris*) - - # On Solaris (at least, for some versions), libc contains stubbed - # (non-functional) versions of the pthreads routines, so link-based - # tests will erroneously succeed. (We need to link with -pthreads/-mt/ - # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather - # a function called by this macro, so we could check for that, but - # who knows whether they'll stub that too in a future libc.) So, - # we'll just look for -pthreads and -lpthread first: - - acx_pthread_flags="-pthreads pthread -mt -pthread $acx_pthread_flags" - ;; -esac - -if test x"$acx_pthread_ok" = xno; then -for flag in $acx_pthread_flags; do - - case $flag in - none) - AC_MSG_CHECKING([whether pthreads work without any flags]) - ;; - - -*) - AC_MSG_CHECKING([whether pthreads work with $flag]) - PTHREAD_CFLAGS="$flag" - ;; - - pthread-config) - AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no) - if test x"$acx_pthread_config" = xno; then continue; fi - PTHREAD_CFLAGS="`pthread-config --cflags`" - PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" - ;; - - *) - AC_MSG_CHECKING([for the pthreads library -l$flag]) - PTHREAD_LIBS="-l$flag" - ;; - esac - - save_LIBS="$LIBS" - save_CFLAGS="$CFLAGS" - LIBS="$PTHREAD_LIBS $LIBS" - CFLAGS="$CFLAGS $PTHREAD_CFLAGS" - - # Check for various functions. We must include pthread.h, - # since some functions may be macros. (On the Sequent, we - # need a special flag -Kthread to make this header compile.) - # We check for pthread_join because it is in -lpthread on IRIX - # while pthread_create is in libc. We check for pthread_attr_init - # due to DEC craziness with -lpthreads. We check for - # pthread_cleanup_push because it is one of the few pthread - # functions on Solaris that doesn't have a non-functional libc stub. - # We try pthread_create on general principles. - AC_TRY_LINK([#include <pthread.h>], - [pthread_t th; pthread_join(th, 0); - pthread_attr_init(0); pthread_cleanup_push(0, 0); - pthread_create(0,0,0,0); pthread_cleanup_pop(0); ], - [acx_pthread_ok=yes]) - - LIBS="$save_LIBS" - CFLAGS="$save_CFLAGS" - - AC_MSG_RESULT($acx_pthread_ok) - if test "x$acx_pthread_ok" = xyes; then - break; - fi - - PTHREAD_LIBS="" - PTHREAD_CFLAGS="" -done -fi - -# Various other checks: -if test "x$acx_pthread_ok" = xyes; then - save_LIBS="$LIBS" - LIBS="$PTHREAD_LIBS $LIBS" - save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS $PTHREAD_CFLAGS" - - # Detect AIX lossage: JOINABLE attribute is called UNDETACHED. - AC_MSG_CHECKING([for joinable pthread attribute]) - attr_name=unknown - for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do - AC_TRY_LINK([#include <pthread.h>], [int attr=$attr; return attr;], - [attr_name=$attr; break]) - done - AC_MSG_RESULT($attr_name) - if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then - AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name, - [Define to necessary symbol if this constant - uses a non-standard name on your system.]) - fi - - AC_MSG_CHECKING([if more special flags are required for pthreads]) - flag=no - case "${host_cpu}-${host_os}" in - *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";; - *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";; - esac - AC_MSG_RESULT(${flag}) - if test "x$flag" != xno; then - PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS" - fi - - LIBS="$save_LIBS" - CFLAGS="$save_CFLAGS" - # More AIX lossage: must compile with xlc_r or cc_r - if test x"$GCC" != xyes; then - AC_CHECK_PROGS(PTHREAD_CC, xlc_r cc_r, ${CC}) - else - PTHREAD_CC=$CC - fi - - # The next part tries to detect GCC inconsistency with -shared on some - # architectures and systems. The problem is that in certain - # configurations, when -shared is specified, GCC "forgets" to - # internally use various flags which are still necessary. - - AC_MSG_CHECKING([whether to check for GCC pthread/shared inconsistencies]) - check_inconsistencies=yes - case "${host_cpu}-${host_os}" in - *-darwin*) check_inconsistencies=no ;; - esac - if test x"$GCC" != xyes -o "x$check_inconsistencies" != xyes ; then - AC_MSG_RESULT([no]) - else - AC_MSG_RESULT([yes]) - - # In order not to create several levels of indentation, we test - # the value of "$ok" until we find out the cure or run out of - # ideas. - ok="no" - - # - # Prepare the flags - # - save_CFLAGS="$CFLAGS" - save_LIBS="$LIBS" - save_CC="$CC" - # Try with the flags determined by the earlier checks. - # - # -Wl,-z,defs forces link-time symbol resolution, so that the - # linking checks with -shared actually have any value - # - # FIXME: -fPIC is required for -shared on many architectures, - # so we specify it here, but the right way would probably be to - # properly detect whether it is actually required. - CFLAGS="-shared -fPIC -Wl,-z,defs $CFLAGS $PTHREAD_CFLAGS" - LIBS="$PTHREAD_LIBS $LIBS" - CC="$PTHREAD_CC" - - AC_MSG_CHECKING([whether -pthread is sufficient with -shared]) - AC_TRY_LINK([#include <pthread.h>], - [pthread_t th; pthread_join(th, 0); - pthread_attr_init(0); pthread_cleanup_push(0, 0); - pthread_create(0,0,0,0); pthread_cleanup_pop(0); ], - [ok=yes]) - - if test "x$ok" = xyes; then - AC_MSG_RESULT([yes]) - else - AC_MSG_RESULT([no]) - fi - - # - # Linux gcc on some architectures such as mips/mipsel forgets - # about -lpthread - # - if test x"$ok" = xno; then - AC_MSG_CHECKING([whether -lpthread fixes that]) - LIBS="-lpthread $PTHREAD_LIBS $save_LIBS" - AC_TRY_LINK([#include <pthread.h>], - [pthread_t th; pthread_join(th, 0); - pthread_attr_init(0); pthread_cleanup_push(0, 0); - pthread_create(0,0,0,0); pthread_cleanup_pop(0); ], - [ok=yes]) - - if test "x$ok" = xyes; then - AC_MSG_RESULT([yes]) - PTHREAD_LIBS="-lpthread $PTHREAD_LIBS" - else - AC_MSG_RESULT([no]) - fi - fi - # - # FreeBSD 4.10 gcc forgets to use -lc_r instead of -lc - # - if test x"$ok" = xno; then - AC_MSG_CHECKING([whether -lc_r fixes that]) - LIBS="-lc_r $PTHREAD_LIBS $save_LIBS" - AC_TRY_LINK([#include <pthread.h>], - [pthread_t th; pthread_join(th, 0); - pthread_attr_init(0); pthread_cleanup_push(0, 0); - pthread_create(0,0,0,0); pthread_cleanup_pop(0); ], - [ok=yes]) - - if test "x$ok" = xyes; then - AC_MSG_RESULT([yes]) - PTHREAD_LIBS="-lc_r $PTHREAD_LIBS" - else - AC_MSG_RESULT([no]) - fi - fi - if test x"$ok" = xno; then - # OK, we have run out of ideas - AC_MSG_WARN([Impossible to determine how to use pthreads with shared libraries]) - - # so it's not safe to assume that we may use pthreads - acx_pthread_ok=no - fi - - CFLAGS="$save_CFLAGS" - LIBS="$save_LIBS" - CC="$save_CC" - fi -else - PTHREAD_CC="$CC" -fi - -AC_SUBST(PTHREAD_LIBS) -AC_SUBST(PTHREAD_CFLAGS) -AC_SUBST(PTHREAD_CC) - -# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: -if test x"$acx_pthread_ok" = xyes; then - ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1]) - : -else - acx_pthread_ok=no - $2 -fi -AC_LANG_RESTORE -])dnl ACX_PTHREAD |