| # =========================================================================== |
| # https://www.gnu.org/software/autoconf-archive/ax_pthread.html |
| # =========================================================================== |
| # |
| # SYNOPSIS |
| # |
| # AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) |
| # |
| # DESCRIPTION |
| # |
| # This macro figures out how to build C programs using POSIX threads. It |
| # sets the PTHREAD_LIBS output variable to the threads library and linker |
| # flags, and the PTHREAD_CFLAGS output variable to any special C compiler |
| # flags that are needed. (The user can also force certain compiler |
| # flags/libs to be tested by setting these environment variables.) |
| # |
| # Also sets PTHREAD_CC and PTHREAD_CXX to any special C compiler that is |
| # needed for multi-threaded programs (defaults to the value of CC |
| # respectively CXX otherwise). (This is necessary on e.g. AIX to use the |
| # special cc_r/CC_r compiler alias.) |
| # |
| # NOTE: You are assumed to not only compile your program with these flags, |
| # but also to link with them as well. For example, you might link with |
| # $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS |
| # $PTHREAD_CXX $CXXFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS |
| # |
| # If you are only building threaded programs, you may wish to use these |
| # variables in your default LIBS, CFLAGS, and CC: |
| # |
| # LIBS="$PTHREAD_LIBS $LIBS" |
| # CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
| # CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS" |
| # CC="$PTHREAD_CC" |
| # CXX="$PTHREAD_CXX" |
| # |
| # In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant |
| # has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to |
| # that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX). |
| # |
| # Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the |
| # PTHREAD_PRIO_INHERIT symbol is defined when compiling with |
| # PTHREAD_CFLAGS. |
| # |
| # ACTION-IF-FOUND is a list of shell commands to run if a threads library |
| # is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it |
| # is not found. If ACTION-IF-FOUND is not specified, the default action |
| # will define HAVE_PTHREAD. |
| # |
| # Please let the authors know if this macro fails on any platform, or if |
| # you have any other suggestions or comments. This macro was based on work |
| # by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help |
| # from M. Frigo), as well as ac_pthread and hb_pthread macros posted by |
| # Alejandro Forero Cuervo to the autoconf macro repository. We are also |
| # grateful for the helpful feedback of numerous users. |
| # |
| # Updated for Autoconf 2.68 by Daniel Richard G. |
| # |
| # LICENSE |
| # |
| # Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu> |
| # Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG> |
| # Copyright (c) 2019 Marc Stevens <marc.stevens@cwi.nl> |
| # |
| # This program is free software: you can redistribute it and/or modify it |
| # under the terms of the GNU General Public License as published by the |
| # Free Software Foundation, either version 3 of the License, or (at your |
| # option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, but |
| # WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
| # Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License along |
| # with this program. If not, see <https://www.gnu.org/licenses/>. |
| # |
| # As a special exception, the respective Autoconf Macro's copyright owner |
| # gives unlimited permission to copy, distribute and modify the configure |
| # scripts that are the output of Autoconf when processing the Macro. You |
| # need not follow the terms of the GNU General Public License when using |
| # or distributing such scripts, even though portions of the text of the |
| # Macro appear in them. The GNU General Public License (GPL) does govern |
| # all other use of the material that constitutes the Autoconf Macro. |
| # |
| # This special exception to the GPL applies to versions of the Autoconf |
| # Macro released by the Autoconf Archive. When you make and distribute a |
| # modified version of the Autoconf Macro, you may extend this special |
| # exception to the GPL to apply to your modified version as well. |
| |
| #serial 30 |
| |
| AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD]) |
| AC_DEFUN([AX_PTHREAD], [ |
| AC_REQUIRE([AC_CANONICAL_TARGET]) |
| AC_REQUIRE([AC_PROG_CC]) |
| AC_REQUIRE([AC_PROG_SED]) |
| AC_LANG_PUSH([C]) |
| ax_pthread_ok=no |
| |
| # We used to check for pthread.h first, but this fails if pthread.h |
| # requires special compiler flags (e.g. on Tru64 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_CFLAGS$PTHREAD_LIBS" != "x"; then |
| ax_pthread_save_CC="$CC" |
| ax_pthread_save_CFLAGS="$CFLAGS" |
| ax_pthread_save_LIBS="$LIBS" |
| AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"]) |
| AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"]) |
| CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
| LIBS="$PTHREAD_LIBS $LIBS" |
| AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS]) |
| AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes]) |
| AC_MSG_RESULT([$ax_pthread_ok]) |
| if test "x$ax_pthread_ok" = "xno"; then |
| PTHREAD_LIBS="" |
| PTHREAD_CFLAGS="" |
| fi |
| CC="$ax_pthread_save_CC" |
| CFLAGS="$ax_pthread_save_CFLAGS" |
| LIBS="$ax_pthread_save_LIBS" |
| 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 with a "," contain both |
| # C compiler flags (before ",") and linker flags (after ","). Other items |
| # starting with a "-" are C compiler flags, and remaining 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. |
| |
| ax_pthread_flags="pthreads none -Kthread -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) |
| # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64 |
| # (Note: HP C rejects this with "bad form for `-t' option") |
| # -pthreads: Solaris/gcc (Note: HP C also rejects) |
| # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it |
| # doesn't hurt to check since this sometimes defines pthreads and |
| # -D_REENTRANT too), HP C (must be checked before -lpthread, which |
| # is present but should not be used directly; and before -mthreads, |
| # because the compiler interprets this as "-mt" + "-hreads") |
| # -mthreads: Mingw32/gcc, Lynx/gcc |
| # pthread: Linux, etcetera |
| # --thread-safe: KAI C++ |
| # pthread-config: use pthread-config program (for GNU Pth library) |
| |
| case $target_os in |
| |
| freebsd*) |
| |
| # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) |
| # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) |
| |
| ax_pthread_flags="-kthread lthread $ax_pthread_flags" |
| ;; |
| |
| hpux*) |
| |
| # From the cc(1) man page: "[-mt] Sets various -D flags to enable |
| # multi-threading and also sets -lpthread." |
| |
| ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags" |
| ;; |
| |
| openedition*) |
| |
| # IBM z/OS requires a feature-test macro to be defined in order to |
| # enable POSIX threads at all, so give the user a hint if this is |
| # not set. (We don't define these ourselves, as they can affect |
| # other portions of the system API in unpredictable ways.) |
| |
| AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING], |
| [ |
| # if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS) |
| AX_PTHREAD_ZOS_MISSING |
| # endif |
| ], |
| [AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])]) |
| ;; |
| |
| 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. (N.B.: 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 check first for the |
| # standard Solaris way of linking pthreads (-mt -lpthread). |
| |
| ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags" |
| ;; |
| esac |
| |
| # Are we compiling with Clang? |
| |
| AC_CACHE_CHECK([whether $CC is Clang], |
| [ax_cv_PTHREAD_CLANG], |
| [ax_cv_PTHREAD_CLANG=no |
| # Note that Autoconf sets GCC=yes for Clang as well as GCC |
| if test "x$GCC" = "xyes"; then |
| AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG], |
| [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */ |
| # if defined(__clang__) && defined(__llvm__) |
| AX_PTHREAD_CC_IS_CLANG |
| # endif |
| ], |
| [ax_cv_PTHREAD_CLANG=yes]) |
| fi |
| ]) |
| ax_pthread_clang="$ax_cv_PTHREAD_CLANG" |
| |
| |
| # GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC) |
| |
| # Note that for GCC and Clang -pthread generally implies -lpthread, |
| # except when -nostdlib is passed. |
| # This is problematic using libtool to build C++ shared libraries with pthread: |
| # [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460 |
| # [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333 |
| # [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555 |
| # To solve this, first try -pthread together with -lpthread for GCC |
| |
| AS_IF([test "x$GCC" = "xyes"], |
| [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"]) |
| |
| # Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first |
| |
| AS_IF([test "x$ax_pthread_clang" = "xyes"], |
| [ax_pthread_flags="-pthread,-lpthread -pthread"]) |
| |
| |
| # The presence of a feature test macro requesting re-entrant function |
| # definitions is, on some systems, a strong hint that pthreads support is |
| # correctly enabled |
| |
| case $target_os in |
| darwin* | hpux* | linux* | osf* | solaris*) |
| ax_pthread_check_macro="_REENTRANT" |
| ;; |
| |
| aix*) |
| ax_pthread_check_macro="_THREAD_SAFE" |
| ;; |
| |
| *) |
| ax_pthread_check_macro="--" |
| ;; |
| esac |
| AS_IF([test "x$ax_pthread_check_macro" = "x--"], |
| [ax_pthread_check_cond=0], |
| [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"]) |
| |
| |
| if test "x$ax_pthread_ok" = "xno"; then |
| for ax_pthread_try_flag in $ax_pthread_flags; do |
| |
| case $ax_pthread_try_flag in |
| none) |
| AC_MSG_CHECKING([whether pthreads work without any flags]) |
| ;; |
| |
| *,*) |
| PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"` |
| PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"` |
| AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"]) |
| ;; |
| |
| -*) |
| AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag]) |
| PTHREAD_CFLAGS="$ax_pthread_try_flag" |
| ;; |
| |
| pthread-config) |
| AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no]) |
| AS_IF([test "x$ax_pthread_config" = "xno"], [continue]) |
| PTHREAD_CFLAGS="`pthread-config --cflags`" |
| PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" |
| ;; |
| |
| *) |
| AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag]) |
| PTHREAD_LIBS="-l$ax_pthread_try_flag" |
| ;; |
| esac |
| |
| ax_pthread_save_CFLAGS="$CFLAGS" |
| ax_pthread_save_LIBS="$LIBS" |
| CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
| LIBS="$PTHREAD_LIBS $LIBS" |
| |
| # 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_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h> |
| # if $ax_pthread_check_cond |
| # error "$ax_pthread_check_macro must be defined" |
| # endif |
| static void *some_global = NULL; |
| static void routine(void *a) |
| { |
| /* To avoid any unused-parameter or |
| unused-but-set-parameter warning. */ |
| some_global = a; |
| } |
| static void *start_routine(void *a) { return a; }], |
| [pthread_t th; pthread_attr_t attr; |
| pthread_create(&th, 0, start_routine, 0); |
| pthread_join(th, 0); |
| pthread_attr_init(&attr); |
| pthread_cleanup_push(routine, 0); |
| pthread_cleanup_pop(0) /* ; */])], |
| [ax_pthread_ok=yes], |
| []) |
| |
| CFLAGS="$ax_pthread_save_CFLAGS" |
| LIBS="$ax_pthread_save_LIBS" |
| |
| AC_MSG_RESULT([$ax_pthread_ok]) |
| AS_IF([test "x$ax_pthread_ok" = "xyes"], [break]) |
| |
| PTHREAD_LIBS="" |
| PTHREAD_CFLAGS="" |
| done |
| fi |
| |
| |
| # Clang needs special handling, because older versions handle the -pthread |
| # option in a rather... idiosyncratic way |
| |
| if test "x$ax_pthread_clang" = "xyes"; then |
| |
| # Clang takes -pthread; it has never supported any other flag |
| |
| # (Note 1: This will need to be revisited if a system that Clang |
| # supports has POSIX threads in a separate library. This tends not |
| # to be the way of modern systems, but it's conceivable.) |
| |
| # (Note 2: On some systems, notably Darwin, -pthread is not needed |
| # to get POSIX threads support; the API is always present and |
| # active. We could reasonably leave PTHREAD_CFLAGS empty. But |
| # -pthread does define _REENTRANT, and while the Darwin headers |
| # ignore this macro, third-party headers might not.) |
| |
| # However, older versions of Clang make a point of warning the user |
| # that, in an invocation where only linking and no compilation is |
| # taking place, the -pthread option has no effect ("argument unused |
| # during compilation"). They expect -pthread to be passed in only |
| # when source code is being compiled. |
| # |
| # Problem is, this is at odds with the way Automake and most other |
| # C build frameworks function, which is that the same flags used in |
| # compilation (CFLAGS) are also used in linking. Many systems |
| # supported by AX_PTHREAD require exactly this for POSIX threads |
| # support, and in fact it is often not straightforward to specify a |
| # flag that is used only in the compilation phase and not in |
| # linking. Such a scenario is extremely rare in practice. |
| # |
| # Even though use of the -pthread flag in linking would only print |
| # a warning, this can be a nuisance for well-run software projects |
| # that build with -Werror. So if the active version of Clang has |
| # this misfeature, we search for an option to squash it. |
| |
| AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread], |
| [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG], |
| [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown |
| # Create an alternate version of $ac_link that compiles and |
| # links in two steps (.c -> .o, .o -> exe) instead of one |
| # (.c -> exe), because the warning occurs only in the second |
| # step |
| ax_pthread_save_ac_link="$ac_link" |
| ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g' |
| ax_pthread_link_step=`AS_ECHO(["$ac_link"]) | sed "$ax_pthread_sed"` |
| ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)" |
| ax_pthread_save_CFLAGS="$CFLAGS" |
| for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do |
| AS_IF([test "x$ax_pthread_try" = "xunknown"], [break]) |
| CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS" |
| ac_link="$ax_pthread_save_ac_link" |
| AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])], |
| [ac_link="$ax_pthread_2step_ac_link" |
| AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])], |
| [break]) |
| ]) |
| done |
| ac_link="$ax_pthread_save_ac_link" |
| CFLAGS="$ax_pthread_save_CFLAGS" |
| AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no]) |
| ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try" |
| ]) |
| |
| case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in |
| no | unknown) ;; |
| *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;; |
| esac |
| |
| fi # $ax_pthread_clang = yes |
| |
| |
| |
| # Various other checks: |
| if test "x$ax_pthread_ok" = "xyes"; then |
| ax_pthread_save_CFLAGS="$CFLAGS" |
| ax_pthread_save_LIBS="$LIBS" |
| CFLAGS="$CFLAGS $PTHREAD_CFLAGS" |
| LIBS="$PTHREAD_LIBS $LIBS" |
| |
| # Detect AIX lossage: JOINABLE attribute is called UNDETACHED. |
| AC_CACHE_CHECK([for joinable pthread attribute], |
| [ax_cv_PTHREAD_JOINABLE_ATTR], |
| [ax_cv_PTHREAD_JOINABLE_ATTR=unknown |
| for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do |
| AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>], |
| [int attr = $ax_pthread_attr; return attr /* ; */])], |
| [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break], |
| []) |
| done |
| ]) |
| AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \ |
| test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \ |
| test "x$ax_pthread_joinable_attr_defined" != "xyes"], |
| [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], |
| [$ax_cv_PTHREAD_JOINABLE_ATTR], |
| [Define to necessary symbol if this constant |
| uses a non-standard name on your system.]) |
| ax_pthread_joinable_attr_defined=yes |
| ]) |
| |
| AC_CACHE_CHECK([whether more special flags are required for pthreads], |
| [ax_cv_PTHREAD_SPECIAL_FLAGS], |
| [ax_cv_PTHREAD_SPECIAL_FLAGS=no |
| case $target_os in |
| solaris*) |
| ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS" |
| ;; |
| esac |
| ]) |
| AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \ |
| test "x$ax_pthread_special_flags_added" != "xyes"], |
| [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS" |
| ax_pthread_special_flags_added=yes]) |
| |
| AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT], |
| [ax_cv_PTHREAD_PRIO_INHERIT], |
| [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], |
| [[int i = PTHREAD_PRIO_INHERIT; |
| return i;]])], |
| [ax_cv_PTHREAD_PRIO_INHERIT=yes], |
| [ax_cv_PTHREAD_PRIO_INHERIT=no]) |
| ]) |
| AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \ |
| test "x$ax_pthread_prio_inherit_defined" != "xyes"], |
| [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.]) |
| ax_pthread_prio_inherit_defined=yes |
| ]) |
| |
| CFLAGS="$ax_pthread_save_CFLAGS" |
| LIBS="$ax_pthread_save_LIBS" |
| |
| # More AIX lossage: compile with *_r variant |
| if test "x$GCC" != "xyes"; then |
| case $target_os in |
| aix*) |
| AS_CASE(["x/$CC"], |
| [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6], |
| [#handle absolute path differently from PATH based program lookup |
| AS_CASE(["x$CC"], |
| [x/*], |
| [ |
| AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"]) |
| AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])]) |
| ], |
| [ |
| AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC]) |
| AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])]) |
| ] |
| ) |
| ]) |
| ;; |
| esac |
| fi |
| fi |
| |
| test -n "$PTHREAD_CC" || PTHREAD_CC="$CC" |
| test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX" |
| |
| AC_SUBST([PTHREAD_LIBS]) |
| AC_SUBST([PTHREAD_CFLAGS]) |
| AC_SUBST([PTHREAD_CC]) |
| AC_SUBST([PTHREAD_CXX]) |
| |
| # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: |
| if test "x$ax_pthread_ok" = "xyes"; then |
| ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1]) |
| : |
| else |
| ax_pthread_ok=no |
| $2 |
| fi |
| AC_LANG_POP |
| ])dnl AX_PTHREAD |