868b2b66 (kx 2024-12-20 16:11:07 +0300 1) # ===========================================================================
868b2b66 (kx 2024-12-20 16:11:07 +0300 2) # https://www.gnu.org/software/autoconf-archive/ax_pthread.html
868b2b66 (kx 2024-12-20 16:11:07 +0300 3) # ===========================================================================
868b2b66 (kx 2024-12-20 16:11:07 +0300 4) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 5) # SYNOPSIS
868b2b66 (kx 2024-12-20 16:11:07 +0300 6) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 7) # AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
868b2b66 (kx 2024-12-20 16:11:07 +0300 8) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 9) # DESCRIPTION
868b2b66 (kx 2024-12-20 16:11:07 +0300 10) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 11) # This macro figures out how to build C programs using POSIX threads. It
868b2b66 (kx 2024-12-20 16:11:07 +0300 12) # sets the PTHREAD_LIBS output variable to the threads library and linker
868b2b66 (kx 2024-12-20 16:11:07 +0300 13) # flags, and the PTHREAD_CFLAGS output variable to any special C compiler
868b2b66 (kx 2024-12-20 16:11:07 +0300 14) # flags that are needed. (The user can also force certain compiler
868b2b66 (kx 2024-12-20 16:11:07 +0300 15) # flags/libs to be tested by setting these environment variables.)
868b2b66 (kx 2024-12-20 16:11:07 +0300 16) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 17) # Also sets PTHREAD_CC and PTHREAD_CXX to any special C compiler that is
868b2b66 (kx 2024-12-20 16:11:07 +0300 18) # needed for multi-threaded programs (defaults to the value of CC
868b2b66 (kx 2024-12-20 16:11:07 +0300 19) # respectively CXX otherwise). (This is necessary on e.g. AIX to use the
868b2b66 (kx 2024-12-20 16:11:07 +0300 20) # special cc_r/CC_r compiler alias.)
868b2b66 (kx 2024-12-20 16:11:07 +0300 21) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 22) # NOTE: You are assumed to not only compile your program with these flags,
868b2b66 (kx 2024-12-20 16:11:07 +0300 23) # but also to link with them as well. For example, you might link with
868b2b66 (kx 2024-12-20 16:11:07 +0300 24) # $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
868b2b66 (kx 2024-12-20 16:11:07 +0300 25) # $PTHREAD_CXX $CXXFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
868b2b66 (kx 2024-12-20 16:11:07 +0300 26) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 27) # If you are only building threaded programs, you may wish to use these
868b2b66 (kx 2024-12-20 16:11:07 +0300 28) # variables in your default LIBS, CFLAGS, and CC:
868b2b66 (kx 2024-12-20 16:11:07 +0300 29) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 30) # LIBS="$PTHREAD_LIBS $LIBS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 31) # CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 32) # CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 33) # CC="$PTHREAD_CC"
868b2b66 (kx 2024-12-20 16:11:07 +0300 34) # CXX="$PTHREAD_CXX"
868b2b66 (kx 2024-12-20 16:11:07 +0300 35) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 36) # In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
868b2b66 (kx 2024-12-20 16:11:07 +0300 37) # has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
868b2b66 (kx 2024-12-20 16:11:07 +0300 38) # that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
868b2b66 (kx 2024-12-20 16:11:07 +0300 39) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 40) # Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the
868b2b66 (kx 2024-12-20 16:11:07 +0300 41) # PTHREAD_PRIO_INHERIT symbol is defined when compiling with
868b2b66 (kx 2024-12-20 16:11:07 +0300 42) # PTHREAD_CFLAGS.
868b2b66 (kx 2024-12-20 16:11:07 +0300 43) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 44) # ACTION-IF-FOUND is a list of shell commands to run if a threads library
868b2b66 (kx 2024-12-20 16:11:07 +0300 45) # is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
868b2b66 (kx 2024-12-20 16:11:07 +0300 46) # is not found. If ACTION-IF-FOUND is not specified, the default action
868b2b66 (kx 2024-12-20 16:11:07 +0300 47) # will define HAVE_PTHREAD.
868b2b66 (kx 2024-12-20 16:11:07 +0300 48) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 49) # Please let the authors know if this macro fails on any platform, or if
868b2b66 (kx 2024-12-20 16:11:07 +0300 50) # you have any other suggestions or comments. This macro was based on work
868b2b66 (kx 2024-12-20 16:11:07 +0300 51) # by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help
868b2b66 (kx 2024-12-20 16:11:07 +0300 52) # from M. Frigo), as well as ac_pthread and hb_pthread macros posted by
868b2b66 (kx 2024-12-20 16:11:07 +0300 53) # Alejandro Forero Cuervo to the autoconf macro repository. We are also
868b2b66 (kx 2024-12-20 16:11:07 +0300 54) # grateful for the helpful feedback of numerous users.
868b2b66 (kx 2024-12-20 16:11:07 +0300 55) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 56) # Updated for Autoconf 2.68 by Daniel Richard G.
868b2b66 (kx 2024-12-20 16:11:07 +0300 57) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 58) # LICENSE
868b2b66 (kx 2024-12-20 16:11:07 +0300 59) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 60) # Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
868b2b66 (kx 2024-12-20 16:11:07 +0300 61) # Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG>
868b2b66 (kx 2024-12-20 16:11:07 +0300 62) # Copyright (c) 2019 Marc Stevens <marc.stevens@cwi.nl>
868b2b66 (kx 2024-12-20 16:11:07 +0300 63) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 64) # This program is free software: you can redistribute it and/or modify it
868b2b66 (kx 2024-12-20 16:11:07 +0300 65) # under the terms of the GNU General Public License as published by the
868b2b66 (kx 2024-12-20 16:11:07 +0300 66) # Free Software Foundation, either version 3 of the License, or (at your
868b2b66 (kx 2024-12-20 16:11:07 +0300 67) # option) any later version.
868b2b66 (kx 2024-12-20 16:11:07 +0300 68) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 69) # This program is distributed in the hope that it will be useful, but
868b2b66 (kx 2024-12-20 16:11:07 +0300 70) # WITHOUT ANY WARRANTY; without even the implied warranty of
868b2b66 (kx 2024-12-20 16:11:07 +0300 71) # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
868b2b66 (kx 2024-12-20 16:11:07 +0300 72) # Public License for more details.
868b2b66 (kx 2024-12-20 16:11:07 +0300 73) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 74) # You should have received a copy of the GNU General Public License along
868b2b66 (kx 2024-12-20 16:11:07 +0300 75) # with this program. If not, see <https://www.gnu.org/licenses/>.
868b2b66 (kx 2024-12-20 16:11:07 +0300 76) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 77) # As a special exception, the respective Autoconf Macro's copyright owner
868b2b66 (kx 2024-12-20 16:11:07 +0300 78) # gives unlimited permission to copy, distribute and modify the configure
868b2b66 (kx 2024-12-20 16:11:07 +0300 79) # scripts that are the output of Autoconf when processing the Macro. You
868b2b66 (kx 2024-12-20 16:11:07 +0300 80) # need not follow the terms of the GNU General Public License when using
868b2b66 (kx 2024-12-20 16:11:07 +0300 81) # or distributing such scripts, even though portions of the text of the
868b2b66 (kx 2024-12-20 16:11:07 +0300 82) # Macro appear in them. The GNU General Public License (GPL) does govern
868b2b66 (kx 2024-12-20 16:11:07 +0300 83) # all other use of the material that constitutes the Autoconf Macro.
868b2b66 (kx 2024-12-20 16:11:07 +0300 84) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 85) # This special exception to the GPL applies to versions of the Autoconf
868b2b66 (kx 2024-12-20 16:11:07 +0300 86) # Macro released by the Autoconf Archive. When you make and distribute a
868b2b66 (kx 2024-12-20 16:11:07 +0300 87) # modified version of the Autoconf Macro, you may extend this special
868b2b66 (kx 2024-12-20 16:11:07 +0300 88) # exception to the GPL to apply to your modified version as well.
868b2b66 (kx 2024-12-20 16:11:07 +0300 89)
868b2b66 (kx 2024-12-20 16:11:07 +0300 90) #serial 30
868b2b66 (kx 2024-12-20 16:11:07 +0300 91)
868b2b66 (kx 2024-12-20 16:11:07 +0300 92) AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
868b2b66 (kx 2024-12-20 16:11:07 +0300 93) AC_DEFUN([AX_PTHREAD], [
868b2b66 (kx 2024-12-20 16:11:07 +0300 94) AC_REQUIRE([AC_CANONICAL_TARGET])
868b2b66 (kx 2024-12-20 16:11:07 +0300 95) AC_REQUIRE([AC_PROG_CC])
868b2b66 (kx 2024-12-20 16:11:07 +0300 96) AC_REQUIRE([AC_PROG_SED])
868b2b66 (kx 2024-12-20 16:11:07 +0300 97) AC_LANG_PUSH([C])
868b2b66 (kx 2024-12-20 16:11:07 +0300 98) ax_pthread_ok=no
868b2b66 (kx 2024-12-20 16:11:07 +0300 99)
868b2b66 (kx 2024-12-20 16:11:07 +0300 100) # We used to check for pthread.h first, but this fails if pthread.h
868b2b66 (kx 2024-12-20 16:11:07 +0300 101) # requires special compiler flags (e.g. on Tru64 or Sequent).
868b2b66 (kx 2024-12-20 16:11:07 +0300 102) # It gets checked for in the link test anyway.
868b2b66 (kx 2024-12-20 16:11:07 +0300 103)
868b2b66 (kx 2024-12-20 16:11:07 +0300 104) # First of all, check if the user has set any of the PTHREAD_LIBS,
868b2b66 (kx 2024-12-20 16:11:07 +0300 105) # etcetera environment variables, and if threads linking works using
868b2b66 (kx 2024-12-20 16:11:07 +0300 106) # them:
868b2b66 (kx 2024-12-20 16:11:07 +0300 107) if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
868b2b66 (kx 2024-12-20 16:11:07 +0300 108) ax_pthread_save_CC="$CC"
868b2b66 (kx 2024-12-20 16:11:07 +0300 109) ax_pthread_save_CFLAGS="$CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 110) ax_pthread_save_LIBS="$LIBS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 111) AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
868b2b66 (kx 2024-12-20 16:11:07 +0300 112) AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"])
868b2b66 (kx 2024-12-20 16:11:07 +0300 113) CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 114) LIBS="$PTHREAD_LIBS $LIBS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 115) AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
868b2b66 (kx 2024-12-20 16:11:07 +0300 116) AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes])
868b2b66 (kx 2024-12-20 16:11:07 +0300 117) AC_MSG_RESULT([$ax_pthread_ok])
868b2b66 (kx 2024-12-20 16:11:07 +0300 118) if test "x$ax_pthread_ok" = "xno"; then
868b2b66 (kx 2024-12-20 16:11:07 +0300 119) PTHREAD_LIBS=""
868b2b66 (kx 2024-12-20 16:11:07 +0300 120) PTHREAD_CFLAGS=""
868b2b66 (kx 2024-12-20 16:11:07 +0300 121) fi
868b2b66 (kx 2024-12-20 16:11:07 +0300 122) CC="$ax_pthread_save_CC"
868b2b66 (kx 2024-12-20 16:11:07 +0300 123) CFLAGS="$ax_pthread_save_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 124) LIBS="$ax_pthread_save_LIBS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 125) fi
868b2b66 (kx 2024-12-20 16:11:07 +0300 126)
868b2b66 (kx 2024-12-20 16:11:07 +0300 127) # We must check for the threads library under a number of different
868b2b66 (kx 2024-12-20 16:11:07 +0300 128) # names; the ordering is very important because some systems
868b2b66 (kx 2024-12-20 16:11:07 +0300 129) # (e.g. DEC) have both -lpthread and -lpthreads, where one of the
868b2b66 (kx 2024-12-20 16:11:07 +0300 130) # libraries is broken (non-POSIX).
868b2b66 (kx 2024-12-20 16:11:07 +0300 131)
868b2b66 (kx 2024-12-20 16:11:07 +0300 132) # Create a list of thread flags to try. Items with a "," contain both
868b2b66 (kx 2024-12-20 16:11:07 +0300 133) # C compiler flags (before ",") and linker flags (after ","). Other items
868b2b66 (kx 2024-12-20 16:11:07 +0300 134) # starting with a "-" are C compiler flags, and remaining items are
868b2b66 (kx 2024-12-20 16:11:07 +0300 135) # library names, except for "none" which indicates that we try without
868b2b66 (kx 2024-12-20 16:11:07 +0300 136) # any flags at all, and "pthread-config" which is a program returning
868b2b66 (kx 2024-12-20 16:11:07 +0300 137) # the flags for the Pth emulation library.
868b2b66 (kx 2024-12-20 16:11:07 +0300 138)
868b2b66 (kx 2024-12-20 16:11:07 +0300 139) ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
868b2b66 (kx 2024-12-20 16:11:07 +0300 140)
868b2b66 (kx 2024-12-20 16:11:07 +0300 141) # The ordering *is* (sometimes) important. Some notes on the
868b2b66 (kx 2024-12-20 16:11:07 +0300 142) # individual items follow:
868b2b66 (kx 2024-12-20 16:11:07 +0300 143)
868b2b66 (kx 2024-12-20 16:11:07 +0300 144) # pthreads: AIX (must check this before -lpthread)
868b2b66 (kx 2024-12-20 16:11:07 +0300 145) # none: in case threads are in libc; should be tried before -Kthread and
868b2b66 (kx 2024-12-20 16:11:07 +0300 146) # other compiler flags to prevent continual compiler warnings
868b2b66 (kx 2024-12-20 16:11:07 +0300 147) # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
868b2b66 (kx 2024-12-20 16:11:07 +0300 148) # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
868b2b66 (kx 2024-12-20 16:11:07 +0300 149) # (Note: HP C rejects this with "bad form for `-t' option")
868b2b66 (kx 2024-12-20 16:11:07 +0300 150) # -pthreads: Solaris/gcc (Note: HP C also rejects)
868b2b66 (kx 2024-12-20 16:11:07 +0300 151) # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
868b2b66 (kx 2024-12-20 16:11:07 +0300 152) # doesn't hurt to check since this sometimes defines pthreads and
868b2b66 (kx 2024-12-20 16:11:07 +0300 153) # -D_REENTRANT too), HP C (must be checked before -lpthread, which
868b2b66 (kx 2024-12-20 16:11:07 +0300 154) # is present but should not be used directly; and before -mthreads,
868b2b66 (kx 2024-12-20 16:11:07 +0300 155) # because the compiler interprets this as "-mt" + "-hreads")
868b2b66 (kx 2024-12-20 16:11:07 +0300 156) # -mthreads: Mingw32/gcc, Lynx/gcc
868b2b66 (kx 2024-12-20 16:11:07 +0300 157) # pthread: Linux, etcetera
868b2b66 (kx 2024-12-20 16:11:07 +0300 158) # --thread-safe: KAI C++
868b2b66 (kx 2024-12-20 16:11:07 +0300 159) # pthread-config: use pthread-config program (for GNU Pth library)
868b2b66 (kx 2024-12-20 16:11:07 +0300 160)
868b2b66 (kx 2024-12-20 16:11:07 +0300 161) case $target_os in
868b2b66 (kx 2024-12-20 16:11:07 +0300 162)
868b2b66 (kx 2024-12-20 16:11:07 +0300 163) freebsd*)
868b2b66 (kx 2024-12-20 16:11:07 +0300 164)
868b2b66 (kx 2024-12-20 16:11:07 +0300 165) # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
868b2b66 (kx 2024-12-20 16:11:07 +0300 166) # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
868b2b66 (kx 2024-12-20 16:11:07 +0300 167)
868b2b66 (kx 2024-12-20 16:11:07 +0300 168) ax_pthread_flags="-kthread lthread $ax_pthread_flags"
868b2b66 (kx 2024-12-20 16:11:07 +0300 169) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 170)
868b2b66 (kx 2024-12-20 16:11:07 +0300 171) hpux*)
868b2b66 (kx 2024-12-20 16:11:07 +0300 172)
868b2b66 (kx 2024-12-20 16:11:07 +0300 173) # From the cc(1) man page: "[-mt] Sets various -D flags to enable
868b2b66 (kx 2024-12-20 16:11:07 +0300 174) # multi-threading and also sets -lpthread."
868b2b66 (kx 2024-12-20 16:11:07 +0300 175)
868b2b66 (kx 2024-12-20 16:11:07 +0300 176) ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
868b2b66 (kx 2024-12-20 16:11:07 +0300 177) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 178)
868b2b66 (kx 2024-12-20 16:11:07 +0300 179) openedition*)
868b2b66 (kx 2024-12-20 16:11:07 +0300 180)
868b2b66 (kx 2024-12-20 16:11:07 +0300 181) # IBM z/OS requires a feature-test macro to be defined in order to
868b2b66 (kx 2024-12-20 16:11:07 +0300 182) # enable POSIX threads at all, so give the user a hint if this is
868b2b66 (kx 2024-12-20 16:11:07 +0300 183) # not set. (We don't define these ourselves, as they can affect
868b2b66 (kx 2024-12-20 16:11:07 +0300 184) # other portions of the system API in unpredictable ways.)
868b2b66 (kx 2024-12-20 16:11:07 +0300 185)
868b2b66 (kx 2024-12-20 16:11:07 +0300 186) AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING],
868b2b66 (kx 2024-12-20 16:11:07 +0300 187) [
868b2b66 (kx 2024-12-20 16:11:07 +0300 188) # if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
868b2b66 (kx 2024-12-20 16:11:07 +0300 189) AX_PTHREAD_ZOS_MISSING
868b2b66 (kx 2024-12-20 16:11:07 +0300 190) # endif
868b2b66 (kx 2024-12-20 16:11:07 +0300 191) ],
868b2b66 (kx 2024-12-20 16:11:07 +0300 192) [AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])])
868b2b66 (kx 2024-12-20 16:11:07 +0300 193) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 194)
868b2b66 (kx 2024-12-20 16:11:07 +0300 195) solaris*)
868b2b66 (kx 2024-12-20 16:11:07 +0300 196)
868b2b66 (kx 2024-12-20 16:11:07 +0300 197) # On Solaris (at least, for some versions), libc contains stubbed
868b2b66 (kx 2024-12-20 16:11:07 +0300 198) # (non-functional) versions of the pthreads routines, so link-based
868b2b66 (kx 2024-12-20 16:11:07 +0300 199) # tests will erroneously succeed. (N.B.: The stubs are missing
868b2b66 (kx 2024-12-20 16:11:07 +0300 200) # pthread_cleanup_push, or rather a function called by this macro,
868b2b66 (kx 2024-12-20 16:11:07 +0300 201) # so we could check for that, but who knows whether they'll stub
868b2b66 (kx 2024-12-20 16:11:07 +0300 202) # that too in a future libc.) So we'll check first for the
868b2b66 (kx 2024-12-20 16:11:07 +0300 203) # standard Solaris way of linking pthreads (-mt -lpthread).
868b2b66 (kx 2024-12-20 16:11:07 +0300 204)
868b2b66 (kx 2024-12-20 16:11:07 +0300 205) ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags"
868b2b66 (kx 2024-12-20 16:11:07 +0300 206) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 207) esac
868b2b66 (kx 2024-12-20 16:11:07 +0300 208)
868b2b66 (kx 2024-12-20 16:11:07 +0300 209) # Are we compiling with Clang?
868b2b66 (kx 2024-12-20 16:11:07 +0300 210)
868b2b66 (kx 2024-12-20 16:11:07 +0300 211) AC_CACHE_CHECK([whether $CC is Clang],
868b2b66 (kx 2024-12-20 16:11:07 +0300 212) [ax_cv_PTHREAD_CLANG],
868b2b66 (kx 2024-12-20 16:11:07 +0300 213) [ax_cv_PTHREAD_CLANG=no
868b2b66 (kx 2024-12-20 16:11:07 +0300 214) # Note that Autoconf sets GCC=yes for Clang as well as GCC
868b2b66 (kx 2024-12-20 16:11:07 +0300 215) if test "x$GCC" = "xyes"; then
868b2b66 (kx 2024-12-20 16:11:07 +0300 216) AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG],
868b2b66 (kx 2024-12-20 16:11:07 +0300 217) [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
868b2b66 (kx 2024-12-20 16:11:07 +0300 218) # if defined(__clang__) && defined(__llvm__)
868b2b66 (kx 2024-12-20 16:11:07 +0300 219) AX_PTHREAD_CC_IS_CLANG
868b2b66 (kx 2024-12-20 16:11:07 +0300 220) # endif
868b2b66 (kx 2024-12-20 16:11:07 +0300 221) ],
868b2b66 (kx 2024-12-20 16:11:07 +0300 222) [ax_cv_PTHREAD_CLANG=yes])
868b2b66 (kx 2024-12-20 16:11:07 +0300 223) fi
868b2b66 (kx 2024-12-20 16:11:07 +0300 224) ])
868b2b66 (kx 2024-12-20 16:11:07 +0300 225) ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
868b2b66 (kx 2024-12-20 16:11:07 +0300 226)
868b2b66 (kx 2024-12-20 16:11:07 +0300 227)
868b2b66 (kx 2024-12-20 16:11:07 +0300 228) # GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
868b2b66 (kx 2024-12-20 16:11:07 +0300 229)
868b2b66 (kx 2024-12-20 16:11:07 +0300 230) # Note that for GCC and Clang -pthread generally implies -lpthread,
868b2b66 (kx 2024-12-20 16:11:07 +0300 231) # except when -nostdlib is passed.
868b2b66 (kx 2024-12-20 16:11:07 +0300 232) # This is problematic using libtool to build C++ shared libraries with pthread:
868b2b66 (kx 2024-12-20 16:11:07 +0300 233) # [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
868b2b66 (kx 2024-12-20 16:11:07 +0300 234) # [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333
868b2b66 (kx 2024-12-20 16:11:07 +0300 235) # [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555
868b2b66 (kx 2024-12-20 16:11:07 +0300 236) # To solve this, first try -pthread together with -lpthread for GCC
868b2b66 (kx 2024-12-20 16:11:07 +0300 237)
868b2b66 (kx 2024-12-20 16:11:07 +0300 238) AS_IF([test "x$GCC" = "xyes"],
868b2b66 (kx 2024-12-20 16:11:07 +0300 239) [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"])
868b2b66 (kx 2024-12-20 16:11:07 +0300 240)
868b2b66 (kx 2024-12-20 16:11:07 +0300 241) # Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first
868b2b66 (kx 2024-12-20 16:11:07 +0300 242)
868b2b66 (kx 2024-12-20 16:11:07 +0300 243) AS_IF([test "x$ax_pthread_clang" = "xyes"],
868b2b66 (kx 2024-12-20 16:11:07 +0300 244) [ax_pthread_flags="-pthread,-lpthread -pthread"])
868b2b66 (kx 2024-12-20 16:11:07 +0300 245)
868b2b66 (kx 2024-12-20 16:11:07 +0300 246)
868b2b66 (kx 2024-12-20 16:11:07 +0300 247) # The presence of a feature test macro requesting re-entrant function
868b2b66 (kx 2024-12-20 16:11:07 +0300 248) # definitions is, on some systems, a strong hint that pthreads support is
868b2b66 (kx 2024-12-20 16:11:07 +0300 249) # correctly enabled
868b2b66 (kx 2024-12-20 16:11:07 +0300 250)
868b2b66 (kx 2024-12-20 16:11:07 +0300 251) case $target_os in
868b2b66 (kx 2024-12-20 16:11:07 +0300 252) darwin* | hpux* | linux* | osf* | solaris*)
868b2b66 (kx 2024-12-20 16:11:07 +0300 253) ax_pthread_check_macro="_REENTRANT"
868b2b66 (kx 2024-12-20 16:11:07 +0300 254) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 255)
868b2b66 (kx 2024-12-20 16:11:07 +0300 256) aix*)
868b2b66 (kx 2024-12-20 16:11:07 +0300 257) ax_pthread_check_macro="_THREAD_SAFE"
868b2b66 (kx 2024-12-20 16:11:07 +0300 258) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 259)
868b2b66 (kx 2024-12-20 16:11:07 +0300 260) *)
868b2b66 (kx 2024-12-20 16:11:07 +0300 261) ax_pthread_check_macro="--"
868b2b66 (kx 2024-12-20 16:11:07 +0300 262) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 263) esac
868b2b66 (kx 2024-12-20 16:11:07 +0300 264) AS_IF([test "x$ax_pthread_check_macro" = "x--"],
868b2b66 (kx 2024-12-20 16:11:07 +0300 265) [ax_pthread_check_cond=0],
868b2b66 (kx 2024-12-20 16:11:07 +0300 266) [ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])
868b2b66 (kx 2024-12-20 16:11:07 +0300 267)
868b2b66 (kx 2024-12-20 16:11:07 +0300 268)
868b2b66 (kx 2024-12-20 16:11:07 +0300 269) if test "x$ax_pthread_ok" = "xno"; then
868b2b66 (kx 2024-12-20 16:11:07 +0300 270) for ax_pthread_try_flag in $ax_pthread_flags; do
868b2b66 (kx 2024-12-20 16:11:07 +0300 271)
868b2b66 (kx 2024-12-20 16:11:07 +0300 272) case $ax_pthread_try_flag in
868b2b66 (kx 2024-12-20 16:11:07 +0300 273) none)
868b2b66 (kx 2024-12-20 16:11:07 +0300 274) AC_MSG_CHECKING([whether pthreads work without any flags])
868b2b66 (kx 2024-12-20 16:11:07 +0300 275) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 276)
868b2b66 (kx 2024-12-20 16:11:07 +0300 277) *,*)
868b2b66 (kx 2024-12-20 16:11:07 +0300 278) PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
868b2b66 (kx 2024-12-20 16:11:07 +0300 279) PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
868b2b66 (kx 2024-12-20 16:11:07 +0300 280) AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"])
868b2b66 (kx 2024-12-20 16:11:07 +0300 281) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 282)
868b2b66 (kx 2024-12-20 16:11:07 +0300 283) -*)
868b2b66 (kx 2024-12-20 16:11:07 +0300 284) AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
868b2b66 (kx 2024-12-20 16:11:07 +0300 285) PTHREAD_CFLAGS="$ax_pthread_try_flag"
868b2b66 (kx 2024-12-20 16:11:07 +0300 286) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 287)
868b2b66 (kx 2024-12-20 16:11:07 +0300 288) pthread-config)
868b2b66 (kx 2024-12-20 16:11:07 +0300 289) AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
868b2b66 (kx 2024-12-20 16:11:07 +0300 290) AS_IF([test "x$ax_pthread_config" = "xno"], [continue])
868b2b66 (kx 2024-12-20 16:11:07 +0300 291) PTHREAD_CFLAGS="`pthread-config --cflags`"
868b2b66 (kx 2024-12-20 16:11:07 +0300 292) PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
868b2b66 (kx 2024-12-20 16:11:07 +0300 293) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 294)
868b2b66 (kx 2024-12-20 16:11:07 +0300 295) *)
868b2b66 (kx 2024-12-20 16:11:07 +0300 296) AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag])
868b2b66 (kx 2024-12-20 16:11:07 +0300 297) PTHREAD_LIBS="-l$ax_pthread_try_flag"
868b2b66 (kx 2024-12-20 16:11:07 +0300 298) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 299) esac
868b2b66 (kx 2024-12-20 16:11:07 +0300 300)
868b2b66 (kx 2024-12-20 16:11:07 +0300 301) ax_pthread_save_CFLAGS="$CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 302) ax_pthread_save_LIBS="$LIBS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 303) CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 304) LIBS="$PTHREAD_LIBS $LIBS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 305)
868b2b66 (kx 2024-12-20 16:11:07 +0300 306) # Check for various functions. We must include pthread.h,
868b2b66 (kx 2024-12-20 16:11:07 +0300 307) # since some functions may be macros. (On the Sequent, we
868b2b66 (kx 2024-12-20 16:11:07 +0300 308) # need a special flag -Kthread to make this header compile.)
868b2b66 (kx 2024-12-20 16:11:07 +0300 309) # We check for pthread_join because it is in -lpthread on IRIX
868b2b66 (kx 2024-12-20 16:11:07 +0300 310) # while pthread_create is in libc. We check for pthread_attr_init
868b2b66 (kx 2024-12-20 16:11:07 +0300 311) # due to DEC craziness with -lpthreads. We check for
868b2b66 (kx 2024-12-20 16:11:07 +0300 312) # pthread_cleanup_push because it is one of the few pthread
868b2b66 (kx 2024-12-20 16:11:07 +0300 313) # functions on Solaris that doesn't have a non-functional libc stub.
868b2b66 (kx 2024-12-20 16:11:07 +0300 314) # We try pthread_create on general principles.
868b2b66 (kx 2024-12-20 16:11:07 +0300 315)
868b2b66 (kx 2024-12-20 16:11:07 +0300 316) AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
868b2b66 (kx 2024-12-20 16:11:07 +0300 317) # if $ax_pthread_check_cond
868b2b66 (kx 2024-12-20 16:11:07 +0300 318) # error "$ax_pthread_check_macro must be defined"
868b2b66 (kx 2024-12-20 16:11:07 +0300 319) # endif
868b2b66 (kx 2024-12-20 16:11:07 +0300 320) static void *some_global = NULL;
868b2b66 (kx 2024-12-20 16:11:07 +0300 321) static void routine(void *a)
868b2b66 (kx 2024-12-20 16:11:07 +0300 322) {
868b2b66 (kx 2024-12-20 16:11:07 +0300 323) /* To avoid any unused-parameter or
868b2b66 (kx 2024-12-20 16:11:07 +0300 324) unused-but-set-parameter warning. */
868b2b66 (kx 2024-12-20 16:11:07 +0300 325) some_global = a;
868b2b66 (kx 2024-12-20 16:11:07 +0300 326) }
868b2b66 (kx 2024-12-20 16:11:07 +0300 327) static void *start_routine(void *a) { return a; }],
868b2b66 (kx 2024-12-20 16:11:07 +0300 328) [pthread_t th; pthread_attr_t attr;
868b2b66 (kx 2024-12-20 16:11:07 +0300 329) pthread_create(&th, 0, start_routine, 0);
868b2b66 (kx 2024-12-20 16:11:07 +0300 330) pthread_join(th, 0);
868b2b66 (kx 2024-12-20 16:11:07 +0300 331) pthread_attr_init(&attr);
868b2b66 (kx 2024-12-20 16:11:07 +0300 332) pthread_cleanup_push(routine, 0);
868b2b66 (kx 2024-12-20 16:11:07 +0300 333) pthread_cleanup_pop(0) /* ; */])],
868b2b66 (kx 2024-12-20 16:11:07 +0300 334) [ax_pthread_ok=yes],
868b2b66 (kx 2024-12-20 16:11:07 +0300 335) [])
868b2b66 (kx 2024-12-20 16:11:07 +0300 336)
868b2b66 (kx 2024-12-20 16:11:07 +0300 337) CFLAGS="$ax_pthread_save_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 338) LIBS="$ax_pthread_save_LIBS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 339)
868b2b66 (kx 2024-12-20 16:11:07 +0300 340) AC_MSG_RESULT([$ax_pthread_ok])
868b2b66 (kx 2024-12-20 16:11:07 +0300 341) AS_IF([test "x$ax_pthread_ok" = "xyes"], [break])
868b2b66 (kx 2024-12-20 16:11:07 +0300 342)
868b2b66 (kx 2024-12-20 16:11:07 +0300 343) PTHREAD_LIBS=""
868b2b66 (kx 2024-12-20 16:11:07 +0300 344) PTHREAD_CFLAGS=""
868b2b66 (kx 2024-12-20 16:11:07 +0300 345) done
868b2b66 (kx 2024-12-20 16:11:07 +0300 346) fi
868b2b66 (kx 2024-12-20 16:11:07 +0300 347)
868b2b66 (kx 2024-12-20 16:11:07 +0300 348)
868b2b66 (kx 2024-12-20 16:11:07 +0300 349) # Clang needs special handling, because older versions handle the -pthread
868b2b66 (kx 2024-12-20 16:11:07 +0300 350) # option in a rather... idiosyncratic way
868b2b66 (kx 2024-12-20 16:11:07 +0300 351)
868b2b66 (kx 2024-12-20 16:11:07 +0300 352) if test "x$ax_pthread_clang" = "xyes"; then
868b2b66 (kx 2024-12-20 16:11:07 +0300 353)
868b2b66 (kx 2024-12-20 16:11:07 +0300 354) # Clang takes -pthread; it has never supported any other flag
868b2b66 (kx 2024-12-20 16:11:07 +0300 355)
868b2b66 (kx 2024-12-20 16:11:07 +0300 356) # (Note 1: This will need to be revisited if a system that Clang
868b2b66 (kx 2024-12-20 16:11:07 +0300 357) # supports has POSIX threads in a separate library. This tends not
868b2b66 (kx 2024-12-20 16:11:07 +0300 358) # to be the way of modern systems, but it's conceivable.)
868b2b66 (kx 2024-12-20 16:11:07 +0300 359)
868b2b66 (kx 2024-12-20 16:11:07 +0300 360) # (Note 2: On some systems, notably Darwin, -pthread is not needed
868b2b66 (kx 2024-12-20 16:11:07 +0300 361) # to get POSIX threads support; the API is always present and
868b2b66 (kx 2024-12-20 16:11:07 +0300 362) # active. We could reasonably leave PTHREAD_CFLAGS empty. But
868b2b66 (kx 2024-12-20 16:11:07 +0300 363) # -pthread does define _REENTRANT, and while the Darwin headers
868b2b66 (kx 2024-12-20 16:11:07 +0300 364) # ignore this macro, third-party headers might not.)
868b2b66 (kx 2024-12-20 16:11:07 +0300 365)
868b2b66 (kx 2024-12-20 16:11:07 +0300 366) # However, older versions of Clang make a point of warning the user
868b2b66 (kx 2024-12-20 16:11:07 +0300 367) # that, in an invocation where only linking and no compilation is
868b2b66 (kx 2024-12-20 16:11:07 +0300 368) # taking place, the -pthread option has no effect ("argument unused
868b2b66 (kx 2024-12-20 16:11:07 +0300 369) # during compilation"). They expect -pthread to be passed in only
868b2b66 (kx 2024-12-20 16:11:07 +0300 370) # when source code is being compiled.
868b2b66 (kx 2024-12-20 16:11:07 +0300 371) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 372) # Problem is, this is at odds with the way Automake and most other
868b2b66 (kx 2024-12-20 16:11:07 +0300 373) # C build frameworks function, which is that the same flags used in
868b2b66 (kx 2024-12-20 16:11:07 +0300 374) # compilation (CFLAGS) are also used in linking. Many systems
868b2b66 (kx 2024-12-20 16:11:07 +0300 375) # supported by AX_PTHREAD require exactly this for POSIX threads
868b2b66 (kx 2024-12-20 16:11:07 +0300 376) # support, and in fact it is often not straightforward to specify a
868b2b66 (kx 2024-12-20 16:11:07 +0300 377) # flag that is used only in the compilation phase and not in
868b2b66 (kx 2024-12-20 16:11:07 +0300 378) # linking. Such a scenario is extremely rare in practice.
868b2b66 (kx 2024-12-20 16:11:07 +0300 379) #
868b2b66 (kx 2024-12-20 16:11:07 +0300 380) # Even though use of the -pthread flag in linking would only print
868b2b66 (kx 2024-12-20 16:11:07 +0300 381) # a warning, this can be a nuisance for well-run software projects
868b2b66 (kx 2024-12-20 16:11:07 +0300 382) # that build with -Werror. So if the active version of Clang has
868b2b66 (kx 2024-12-20 16:11:07 +0300 383) # this misfeature, we search for an option to squash it.
868b2b66 (kx 2024-12-20 16:11:07 +0300 384)
868b2b66 (kx 2024-12-20 16:11:07 +0300 385) AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread],
868b2b66 (kx 2024-12-20 16:11:07 +0300 386) [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG],
868b2b66 (kx 2024-12-20 16:11:07 +0300 387) [ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
868b2b66 (kx 2024-12-20 16:11:07 +0300 388) # Create an alternate version of $ac_link that compiles and
868b2b66 (kx 2024-12-20 16:11:07 +0300 389) # links in two steps (.c -> .o, .o -> exe) instead of one
868b2b66 (kx 2024-12-20 16:11:07 +0300 390) # (.c -> exe), because the warning occurs only in the second
868b2b66 (kx 2024-12-20 16:11:07 +0300 391) # step
868b2b66 (kx 2024-12-20 16:11:07 +0300 392) ax_pthread_save_ac_link="$ac_link"
868b2b66 (kx 2024-12-20 16:11:07 +0300 393) ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
868b2b66 (kx 2024-12-20 16:11:07 +0300 394) ax_pthread_link_step=`AS_ECHO(["$ac_link"]) | sed "$ax_pthread_sed"`
868b2b66 (kx 2024-12-20 16:11:07 +0300 395) ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
868b2b66 (kx 2024-12-20 16:11:07 +0300 396) ax_pthread_save_CFLAGS="$CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 397) for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
868b2b66 (kx 2024-12-20 16:11:07 +0300 398) AS_IF([test "x$ax_pthread_try" = "xunknown"], [break])
868b2b66 (kx 2024-12-20 16:11:07 +0300 399) CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 400) ac_link="$ax_pthread_save_ac_link"
868b2b66 (kx 2024-12-20 16:11:07 +0300 401) AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
868b2b66 (kx 2024-12-20 16:11:07 +0300 402) [ac_link="$ax_pthread_2step_ac_link"
868b2b66 (kx 2024-12-20 16:11:07 +0300 403) AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
868b2b66 (kx 2024-12-20 16:11:07 +0300 404) [break])
868b2b66 (kx 2024-12-20 16:11:07 +0300 405) ])
868b2b66 (kx 2024-12-20 16:11:07 +0300 406) done
868b2b66 (kx 2024-12-20 16:11:07 +0300 407) ac_link="$ax_pthread_save_ac_link"
868b2b66 (kx 2024-12-20 16:11:07 +0300 408) CFLAGS="$ax_pthread_save_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 409) AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no])
868b2b66 (kx 2024-12-20 16:11:07 +0300 410) ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
868b2b66 (kx 2024-12-20 16:11:07 +0300 411) ])
868b2b66 (kx 2024-12-20 16:11:07 +0300 412)
868b2b66 (kx 2024-12-20 16:11:07 +0300 413) case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
868b2b66 (kx 2024-12-20 16:11:07 +0300 414) no | unknown) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 415) *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 416) esac
868b2b66 (kx 2024-12-20 16:11:07 +0300 417)
868b2b66 (kx 2024-12-20 16:11:07 +0300 418) fi # $ax_pthread_clang = yes
868b2b66 (kx 2024-12-20 16:11:07 +0300 419)
868b2b66 (kx 2024-12-20 16:11:07 +0300 420)
868b2b66 (kx 2024-12-20 16:11:07 +0300 421)
868b2b66 (kx 2024-12-20 16:11:07 +0300 422) # Various other checks:
868b2b66 (kx 2024-12-20 16:11:07 +0300 423) if test "x$ax_pthread_ok" = "xyes"; then
868b2b66 (kx 2024-12-20 16:11:07 +0300 424) ax_pthread_save_CFLAGS="$CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 425) ax_pthread_save_LIBS="$LIBS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 426) CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 427) LIBS="$PTHREAD_LIBS $LIBS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 428)
868b2b66 (kx 2024-12-20 16:11:07 +0300 429) # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
868b2b66 (kx 2024-12-20 16:11:07 +0300 430) AC_CACHE_CHECK([for joinable pthread attribute],
868b2b66 (kx 2024-12-20 16:11:07 +0300 431) [ax_cv_PTHREAD_JOINABLE_ATTR],
868b2b66 (kx 2024-12-20 16:11:07 +0300 432) [ax_cv_PTHREAD_JOINABLE_ATTR=unknown
868b2b66 (kx 2024-12-20 16:11:07 +0300 433) for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
868b2b66 (kx 2024-12-20 16:11:07 +0300 434) AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
868b2b66 (kx 2024-12-20 16:11:07 +0300 435) [int attr = $ax_pthread_attr; return attr /* ; */])],
868b2b66 (kx 2024-12-20 16:11:07 +0300 436) [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break],
868b2b66 (kx 2024-12-20 16:11:07 +0300 437) [])
868b2b66 (kx 2024-12-20 16:11:07 +0300 438) done
868b2b66 (kx 2024-12-20 16:11:07 +0300 439) ])
868b2b66 (kx 2024-12-20 16:11:07 +0300 440) AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
868b2b66 (kx 2024-12-20 16:11:07 +0300 441) test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
868b2b66 (kx 2024-12-20 16:11:07 +0300 442) test "x$ax_pthread_joinable_attr_defined" != "xyes"],
868b2b66 (kx 2024-12-20 16:11:07 +0300 443) [AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE],
868b2b66 (kx 2024-12-20 16:11:07 +0300 444) [$ax_cv_PTHREAD_JOINABLE_ATTR],
868b2b66 (kx 2024-12-20 16:11:07 +0300 445) [Define to necessary symbol if this constant
868b2b66 (kx 2024-12-20 16:11:07 +0300 446) uses a non-standard name on your system.])
868b2b66 (kx 2024-12-20 16:11:07 +0300 447) ax_pthread_joinable_attr_defined=yes
868b2b66 (kx 2024-12-20 16:11:07 +0300 448) ])
868b2b66 (kx 2024-12-20 16:11:07 +0300 449)
868b2b66 (kx 2024-12-20 16:11:07 +0300 450) AC_CACHE_CHECK([whether more special flags are required for pthreads],
868b2b66 (kx 2024-12-20 16:11:07 +0300 451) [ax_cv_PTHREAD_SPECIAL_FLAGS],
868b2b66 (kx 2024-12-20 16:11:07 +0300 452) [ax_cv_PTHREAD_SPECIAL_FLAGS=no
868b2b66 (kx 2024-12-20 16:11:07 +0300 453) case $target_os in
868b2b66 (kx 2024-12-20 16:11:07 +0300 454) solaris*)
868b2b66 (kx 2024-12-20 16:11:07 +0300 455) ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 456) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 457) esac
868b2b66 (kx 2024-12-20 16:11:07 +0300 458) ])
868b2b66 (kx 2024-12-20 16:11:07 +0300 459) AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
868b2b66 (kx 2024-12-20 16:11:07 +0300 460) test "x$ax_pthread_special_flags_added" != "xyes"],
868b2b66 (kx 2024-12-20 16:11:07 +0300 461) [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 462) ax_pthread_special_flags_added=yes])
868b2b66 (kx 2024-12-20 16:11:07 +0300 463)
868b2b66 (kx 2024-12-20 16:11:07 +0300 464) AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
868b2b66 (kx 2024-12-20 16:11:07 +0300 465) [ax_cv_PTHREAD_PRIO_INHERIT],
868b2b66 (kx 2024-12-20 16:11:07 +0300 466) [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
868b2b66 (kx 2024-12-20 16:11:07 +0300 467) [[int i = PTHREAD_PRIO_INHERIT;
868b2b66 (kx 2024-12-20 16:11:07 +0300 468) return i;]])],
868b2b66 (kx 2024-12-20 16:11:07 +0300 469) [ax_cv_PTHREAD_PRIO_INHERIT=yes],
868b2b66 (kx 2024-12-20 16:11:07 +0300 470) [ax_cv_PTHREAD_PRIO_INHERIT=no])
868b2b66 (kx 2024-12-20 16:11:07 +0300 471) ])
868b2b66 (kx 2024-12-20 16:11:07 +0300 472) AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
868b2b66 (kx 2024-12-20 16:11:07 +0300 473) test "x$ax_pthread_prio_inherit_defined" != "xyes"],
868b2b66 (kx 2024-12-20 16:11:07 +0300 474) [AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])
868b2b66 (kx 2024-12-20 16:11:07 +0300 475) ax_pthread_prio_inherit_defined=yes
868b2b66 (kx 2024-12-20 16:11:07 +0300 476) ])
868b2b66 (kx 2024-12-20 16:11:07 +0300 477)
868b2b66 (kx 2024-12-20 16:11:07 +0300 478) CFLAGS="$ax_pthread_save_CFLAGS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 479) LIBS="$ax_pthread_save_LIBS"
868b2b66 (kx 2024-12-20 16:11:07 +0300 480)
868b2b66 (kx 2024-12-20 16:11:07 +0300 481) # More AIX lossage: compile with *_r variant
868b2b66 (kx 2024-12-20 16:11:07 +0300 482) if test "x$GCC" != "xyes"; then
868b2b66 (kx 2024-12-20 16:11:07 +0300 483) case $target_os in
868b2b66 (kx 2024-12-20 16:11:07 +0300 484) aix*)
868b2b66 (kx 2024-12-20 16:11:07 +0300 485) AS_CASE(["x/$CC"],
868b2b66 (kx 2024-12-20 16:11:07 +0300 486) [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
868b2b66 (kx 2024-12-20 16:11:07 +0300 487) [#handle absolute path differently from PATH based program lookup
868b2b66 (kx 2024-12-20 16:11:07 +0300 488) AS_CASE(["x$CC"],
868b2b66 (kx 2024-12-20 16:11:07 +0300 489) [x/*],
868b2b66 (kx 2024-12-20 16:11:07 +0300 490) [
868b2b66 (kx 2024-12-20 16:11:07 +0300 491) AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])
868b2b66 (kx 2024-12-20 16:11:07 +0300 492) AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])])
868b2b66 (kx 2024-12-20 16:11:07 +0300 493) ],
868b2b66 (kx 2024-12-20 16:11:07 +0300 494) [
868b2b66 (kx 2024-12-20 16:11:07 +0300 495) AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])
868b2b66 (kx 2024-12-20 16:11:07 +0300 496) AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])])
868b2b66 (kx 2024-12-20 16:11:07 +0300 497) ]
868b2b66 (kx 2024-12-20 16:11:07 +0300 498) )
868b2b66 (kx 2024-12-20 16:11:07 +0300 499) ])
868b2b66 (kx 2024-12-20 16:11:07 +0300 500) ;;
868b2b66 (kx 2024-12-20 16:11:07 +0300 501) esac
868b2b66 (kx 2024-12-20 16:11:07 +0300 502) fi
868b2b66 (kx 2024-12-20 16:11:07 +0300 503) fi
868b2b66 (kx 2024-12-20 16:11:07 +0300 504)
868b2b66 (kx 2024-12-20 16:11:07 +0300 505) test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
868b2b66 (kx 2024-12-20 16:11:07 +0300 506) test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
868b2b66 (kx 2024-12-20 16:11:07 +0300 507)
868b2b66 (kx 2024-12-20 16:11:07 +0300 508) AC_SUBST([PTHREAD_LIBS])
868b2b66 (kx 2024-12-20 16:11:07 +0300 509) AC_SUBST([PTHREAD_CFLAGS])
868b2b66 (kx 2024-12-20 16:11:07 +0300 510) AC_SUBST([PTHREAD_CC])
868b2b66 (kx 2024-12-20 16:11:07 +0300 511) AC_SUBST([PTHREAD_CXX])
868b2b66 (kx 2024-12-20 16:11:07 +0300 512)
868b2b66 (kx 2024-12-20 16:11:07 +0300 513) # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
868b2b66 (kx 2024-12-20 16:11:07 +0300 514) if test "x$ax_pthread_ok" = "xyes"; then
868b2b66 (kx 2024-12-20 16:11:07 +0300 515) ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1])
868b2b66 (kx 2024-12-20 16:11:07 +0300 516) :
868b2b66 (kx 2024-12-20 16:11:07 +0300 517) else
868b2b66 (kx 2024-12-20 16:11:07 +0300 518) ax_pthread_ok=no
868b2b66 (kx 2024-12-20 16:11:07 +0300 519) $2
868b2b66 (kx 2024-12-20 16:11:07 +0300 520) fi
868b2b66 (kx 2024-12-20 16:11:07 +0300 521) AC_LANG_POP
868b2b66 (kx 2024-12-20 16:11:07 +0300 522) ])dnl AX_PTHREAD
Math Processor Unit Library
libmpu – library of arithmetic functions for integer, real, and complex numbers of increased digit capacity
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