Merge pull request #1333 from cgull/pkg-config-issue
Replace ancient m4/acx_pthread.m4 with m4/ax_pthread.m4
This commit is contained in:
Jisi Liu
GitHub
commit
478751903a
@ -184,9 +184,8 @@ AS_IF([test "$with_protoc" != "no"], [
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])
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AM_CONDITIONAL([USE_EXTERNAL_PROTOC], [test "$with_protoc" != "no"])
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ACX_PTHREAD
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AM_CONDITIONAL([HAVE_PTHREAD], [test "x$acx_pthread_ok" = "xyes"])
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AX_PTHREAD
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AM_CONDITIONAL([HAVE_PTHREAD], [test "x$ax_pthread_ok" = "xyes"])
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# We still keep this for improving pbconfig.h for unsupported platforms.
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AC_CXX_STL_HASH
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@ -1,397 +0,0 @@
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# This was retrieved from
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# http://svn.0pointer.de/viewvc/trunk/common/acx_pthread.m4?revision=1277&root=avahi
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# See also (perhaps for new versions?)
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# http://svn.0pointer.de/viewvc/trunk/common/acx_pthread.m4?root=avahi
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#
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# We've rewritten the inconsistency check code (from avahi), to work
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# more broadly. In particular, it no longer assumes ld accepts -zdefs.
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# This caused a restructing of the code, but the functionality has only
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# changed a little.
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dnl @synopsis ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
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dnl
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dnl @summary figure out how to build C programs using POSIX threads
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dnl
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dnl This macro figures out how to build C programs using POSIX threads.
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dnl It sets the PTHREAD_LIBS output variable to the threads library and
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dnl linker flags, and the PTHREAD_CFLAGS output variable to any special
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dnl C compiler flags that are needed. (The user can also force certain
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dnl compiler flags/libs to be tested by setting these environment
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dnl variables.)
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dnl
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dnl Also sets PTHREAD_CC to any special C compiler that is needed for
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dnl multi-threaded programs (defaults to the value of CC otherwise).
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dnl (This is necessary on AIX to use the special cc_r compiler alias.)
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dnl
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dnl NOTE: You are assumed to not only compile your program with these
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dnl flags, but also link it with them as well. e.g. you should link
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dnl with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS
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dnl $LIBS
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dnl
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dnl If you are only building threads programs, you may wish to use
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dnl these variables in your default LIBS, CFLAGS, and CC:
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dnl
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dnl LIBS="$PTHREAD_LIBS $LIBS"
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dnl CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
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dnl CC="$PTHREAD_CC"
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dnl
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dnl In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute
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dnl constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to
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dnl that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
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dnl
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dnl ACTION-IF-FOUND is a list of shell commands to run if a threads
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dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to
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dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the
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dnl default action will define HAVE_PTHREAD.
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dnl
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dnl Please let the authors know if this macro fails on any platform, or
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dnl if you have any other suggestions or comments. This macro was based
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dnl on work by SGJ on autoconf scripts for FFTW (www.fftw.org) (with
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dnl help from M. Frigo), as well as ac_pthread and hb_pthread macros
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dnl posted by Alejandro Forero Cuervo to the autoconf macro repository.
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dnl We are also grateful for the helpful feedback of numerous users.
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dnl
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dnl @category InstalledPackages
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dnl @author Steven G. Johnson <stevenj@alum.mit.edu>
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dnl @version 2006-05-29
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dnl @license GPLWithACException
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dnl
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dnl Checks for GCC shared/pthread inconsistency based on work by
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dnl Marcin Owsiany <marcin@owsiany.pl>
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AC_DEFUN([ACX_PTHREAD], [
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AC_REQUIRE([AC_CANONICAL_HOST])
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AC_LANG_SAVE
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AC_LANG_C
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acx_pthread_ok=no
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# We used to check for pthread.h first, but this fails if pthread.h
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# requires special compiler flags (e.g. on True64 or Sequent).
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# It gets checked for in the link test anyway.
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# First of all, check if the user has set any of the PTHREAD_LIBS,
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# etcetera environment variables, and if threads linking works using
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# them:
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if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
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save_LIBS="$LIBS"
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LIBS="$PTHREAD_LIBS $LIBS"
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AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
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AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)
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AC_MSG_RESULT($acx_pthread_ok)
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if test x"$acx_pthread_ok" = xno; then
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PTHREAD_LIBS=""
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PTHREAD_CFLAGS=""
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fi
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LIBS="$save_LIBS"
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CFLAGS="$save_CFLAGS"
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fi
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# We must check for the threads library under a number of different
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# names; the ordering is very important because some systems
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# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
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# libraries is broken (non-POSIX).
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# Create a list of thread flags to try. Items starting with a "-" are
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# C compiler flags, and other items are library names, except for "none"
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# which indicates that we try without any flags at all, and "pthread-config"
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# which is a program returning the flags for the Pth emulation library.
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acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
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# The ordering *is* (sometimes) important. Some notes on the
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# individual items follow:
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# pthreads: AIX (must check this before -lpthread)
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# none: in case threads are in libc; should be tried before -Kthread and
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# other compiler flags to prevent continual compiler warnings
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# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
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# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
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# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
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# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
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# -pthreads: Solaris/gcc
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# -mthreads: Mingw32/gcc, Lynx/gcc
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# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
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# doesn't hurt to check since this sometimes defines pthreads too;
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# also defines -D_REENTRANT)
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# ... -mt is also the pthreads flag for HP/aCC
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# pthread: Linux, etcetera
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# --thread-safe: KAI C++
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# pthread-config: use pthread-config program (for GNU Pth library)
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case "${host_cpu}-${host_os}" in
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*solaris*)
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# On Solaris (at least, for some versions), libc contains stubbed
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# (non-functional) versions of the pthreads routines, so link-based
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# tests will erroneously succeed. (We need to link with -pthreads/-mt/
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# -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
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# a function called by this macro, so we could check for that, but
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# who knows whether they'll stub that too in a future libc.) So,
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# we'll just look for -pthreads and -lpthread first:
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acx_pthread_flags="-pthreads pthread -mt -pthread $acx_pthread_flags"
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;;
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esac
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if test x"$acx_pthread_ok" = xno; then
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for flag in $acx_pthread_flags; do
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case $flag in
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none)
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AC_MSG_CHECKING([whether pthreads work without any flags])
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;;
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-*)
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AC_MSG_CHECKING([whether pthreads work with $flag])
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PTHREAD_CFLAGS="$flag"
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;;
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pthread-config)
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AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)
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if test x"$acx_pthread_config" = xno; then continue; fi
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PTHREAD_CFLAGS="`pthread-config --cflags`"
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PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
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;;
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*)
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AC_MSG_CHECKING([for the pthreads library -l$flag])
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PTHREAD_LIBS="-l$flag"
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;;
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esac
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save_LIBS="$LIBS"
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save_CFLAGS="$CFLAGS"
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LIBS="$PTHREAD_LIBS $LIBS"
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CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
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# Check for various functions. We must include pthread.h,
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# since some functions may be macros. (On the Sequent, we
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# need a special flag -Kthread to make this header compile.)
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# We check for pthread_join because it is in -lpthread on IRIX
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# while pthread_create is in libc. We check for pthread_attr_init
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# due to DEC craziness with -lpthreads. We check for
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# pthread_cleanup_push because it is one of the few pthread
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# functions on Solaris that doesn't have a non-functional libc stub.
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# We try pthread_create on general principles.
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AC_TRY_LINK([#include <pthread.h>],
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[pthread_t th; pthread_join(th, 0);
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pthread_attr_init(0); pthread_cleanup_push(0, 0);
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pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
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[acx_pthread_ok=yes])
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LIBS="$save_LIBS"
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CFLAGS="$save_CFLAGS"
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AC_MSG_RESULT($acx_pthread_ok)
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if test "x$acx_pthread_ok" = xyes; then
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break;
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fi
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PTHREAD_LIBS=""
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PTHREAD_CFLAGS=""
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done
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fi
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# Various other checks:
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if test "x$acx_pthread_ok" = xyes; then
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save_LIBS="$LIBS"
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LIBS="$PTHREAD_LIBS $LIBS"
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
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# Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
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AC_MSG_CHECKING([for joinable pthread attribute])
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attr_name=unknown
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for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
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AC_TRY_LINK([#include <pthread.h>], [int attr=$attr; return attr;],
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[attr_name=$attr; break])
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done
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AC_MSG_RESULT($attr_name)
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if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
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AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,
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[Define to necessary symbol if this constant
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uses a non-standard name on your system.])
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fi
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AC_MSG_CHECKING([if more special flags are required for pthreads])
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flag=no
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case "${host_cpu}-${host_os}" in
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*-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";;
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*solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";;
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esac
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AC_MSG_RESULT(${flag})
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if test "x$flag" != xno; then
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PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
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fi
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LIBS="$save_LIBS"
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CFLAGS="$save_CFLAGS"
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# More AIX lossage: must compile with xlc_r or cc_r
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if test x"$GCC" != xyes; then
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AC_CHECK_PROGS(PTHREAD_CC, xlc_r cc_r, ${CC})
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else
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PTHREAD_CC=$CC
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fi
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# The next part tries to detect GCC inconsistency with -shared on some
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# architectures and systems. The problem is that in certain
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# configurations, when -shared is specified, GCC "forgets" to
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# internally use various flags which are still necessary.
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#
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# Prepare the flags
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#
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save_CFLAGS="$CFLAGS"
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save_LIBS="$LIBS"
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save_CC="$CC"
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# Try with the flags determined by the earlier checks.
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#
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# -Wl,-z,defs forces link-time symbol resolution, so that the
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# linking checks with -shared actually have any value
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#
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# FIXME: -fPIC is required for -shared on many architectures,
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# so we specify it here, but the right way would probably be to
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# properly detect whether it is actually required.
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CFLAGS="-shared -fPIC -Wl,-z,defs $CFLAGS $PTHREAD_CFLAGS"
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LIBS="$PTHREAD_LIBS $LIBS"
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CC="$PTHREAD_CC"
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# In order not to create several levels of indentation, we test
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# the value of "$done" until we find the cure or run out of ideas.
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done="no"
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# First, make sure the CFLAGS we added are actually accepted by our
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# compiler. If not (and OS X's ld, for instance, does not accept -z),
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# then we can't do this test.
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if test x"$done" = xno; then
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AC_MSG_CHECKING([whether to check for GCC pthread/shared inconsistencies])
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AC_TRY_LINK(,, , [done=yes])
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if test "x$done" = xyes ; then
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AC_MSG_RESULT([no])
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else
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AC_MSG_RESULT([yes])
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fi
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fi
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if test x"$done" = xno; then
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AC_MSG_CHECKING([whether -pthread is sufficient with -shared])
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AC_TRY_LINK([#include <pthread.h>],
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[pthread_t th; pthread_join(th, 0);
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pthread_attr_init(0); pthread_cleanup_push(0, 0);
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pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
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[done=yes])
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if test "x$done" = xyes; then
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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fi
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fi
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#
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# Linux gcc on some architectures such as mips/mipsel forgets
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# about -lpthread
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#
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if test x"$done" = xno; then
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AC_MSG_CHECKING([whether -lpthread fixes that])
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LIBS="-lpthread $PTHREAD_LIBS $save_LIBS"
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AC_TRY_LINK([#include <pthread.h>],
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[pthread_t th; pthread_join(th, 0);
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pthread_attr_init(0); pthread_cleanup_push(0, 0);
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pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
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[done=yes])
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if test "x$done" = xyes; then
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AC_MSG_RESULT([yes])
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PTHREAD_LIBS="-lpthread $PTHREAD_LIBS"
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else
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AC_MSG_RESULT([no])
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fi
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fi
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#
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# FreeBSD 4.10 gcc forgets to use -lc_r instead of -lc
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#
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if test x"$done" = xno; then
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AC_MSG_CHECKING([whether -lc_r fixes that])
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LIBS="-lc_r $PTHREAD_LIBS $save_LIBS"
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AC_TRY_LINK([#include <pthread.h>],
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[pthread_t th; pthread_join(th, 0);
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pthread_attr_init(0); pthread_cleanup_push(0, 0);
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pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
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[done=yes])
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if test "x$done" = xyes; then
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AC_MSG_RESULT([yes])
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PTHREAD_LIBS="-lc_r $PTHREAD_LIBS"
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else
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AC_MSG_RESULT([no])
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fi
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fi
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if test x"$done" = xno; then
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# OK, we have run out of ideas
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AC_MSG_WARN([Impossible to determine how to use pthreads with shared libraries])
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# so it's not safe to assume that we may use pthreads
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acx_pthread_ok=no
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fi
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AC_MSG_CHECKING([whether what we have so far is sufficient with -nostdlib])
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CFLAGS="-nostdlib $CFLAGS"
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# we need c with nostdlib
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LIBS="$LIBS -lc"
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AC_TRY_LINK([#include <pthread.h>],
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[pthread_t th; pthread_join(th, 0);
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pthread_attr_init(0); pthread_cleanup_push(0, 0);
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pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
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[done=yes],[done=no])
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if test "x$done" = xyes; then
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AC_MSG_RESULT([yes])
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else
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AC_MSG_RESULT([no])
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fi
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|
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if test x"$done" = xno; then
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AC_MSG_CHECKING([whether -lpthread saves the day])
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LIBS="-lpthread $LIBS"
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AC_TRY_LINK([#include <pthread.h>],
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[pthread_t th; pthread_join(th, 0);
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pthread_attr_init(0); pthread_cleanup_push(0, 0);
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pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],
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[done=yes],[done=no])
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if test "x$done" = xyes; then
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AC_MSG_RESULT([yes])
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PTHREAD_LIBS="$PTHREAD_LIBS -lpthread"
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else
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AC_MSG_RESULT([no])
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AC_MSG_WARN([Impossible to determine how to use pthreads with shared libraries and -nostdlib])
|
||||
fi
|
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fi
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CFLAGS="$save_CFLAGS"
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LIBS="$save_LIBS"
|
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CC="$save_CC"
|
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else
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PTHREAD_CC="$CC"
|
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fi
|
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AC_SUBST(PTHREAD_LIBS)
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AC_SUBST(PTHREAD_CFLAGS)
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AC_SUBST(PTHREAD_CC)
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# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
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if test x"$acx_pthread_ok" = xyes; then
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ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
|
||||
:
|
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else
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acx_pthread_ok=no
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$2
|
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fi
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AC_LANG_RESTORE
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])dnl ACX_PTHREAD
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||||
485
m4/ax_pthread.m4
Normal file
485
m4/ax_pthread.m4
Normal file
@ -0,0 +1,485 @@
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# ===========================================================================
|
||||
# http://www.gnu.org/software/autoconf-archive/ax_pthread.html
|
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# ===========================================================================
|
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#
|
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# SYNOPSIS
|
||||
#
|
||||
# AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
|
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#
|
||||
# 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 to any special C compiler that is needed for
|
||||
# multi-threaded programs (defaults to the value of CC otherwise). (This
|
||||
# is necessary on AIX to use the special 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 $LIBS
|
||||
#
|
||||
# If you are only building threaded programs, you may wish to use these
|
||||
# variables in your default LIBS, CFLAGS, and CC:
|
||||
#
|
||||
# LIBS="$PTHREAD_LIBS $LIBS"
|
||||
# CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
|
||||
# CC="$PTHREAD_CC"
|
||||
#
|
||||
# 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>
|
||||
#
|
||||
# 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 <http://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 22
|
||||
|
||||
AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
|
||||
AC_DEFUN([AX_PTHREAD], [
|
||||
AC_REQUIRE([AC_CANONICAL_HOST])
|
||||
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="$PTHREAD_CC"])
|
||||
CFLAGS="$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 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.
|
||||
|
||||
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 $host_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,pthread pthread $ax_pthread_flags"
|
||||
;;
|
||||
esac
|
||||
|
||||
# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
|
||||
|
||||
AS_IF([test "x$GCC" = "xyes"],
|
||||
[ax_pthread_flags="-pthread -pthreads $ax_pthread_flags"])
|
||||
|
||||
# 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 $host_os in
|
||||
darwin* | hpux* | linux* | osf* | solaris*)
|
||||
ax_pthread_check_macro="_REENTRANT"
|
||||
;;
|
||||
|
||||
aix* | freebsd*)
|
||||
ax_pthread_check_macro="_THREAD_SAFE"
|
||||
;;
|
||||
|
||||
*)
|
||||
ax_pthread_check_macro="--"
|
||||
;;
|
||||
esac
|
||||
AS_IF([test "x$ax_pthread_check_macro" = "x--"],
|
||||
[ax_pthread_check_cond=0],
|
||||
[ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])
|
||||
|
||||
# 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="$ax_cv_PTHREAD_CLANG"
|
||||
|
||||
ax_pthread_clang_warning=no
|
||||
|
||||
# Clang needs special handling, because older versions handle the -pthread
|
||||
# option in a rather... idiosyncratic way
|
||||
|
||||
if test "x$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.)
|
||||
|
||||
PTHREAD_CFLAGS="-pthread"
|
||||
PTHREAD_LIBS=
|
||||
|
||||
ax_pthread_ok=yes
|
||||
|
||||
# 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 # $ax_pthread_clang = yes
|
||||
|
||||
if test "x$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])
|
||||
;;
|
||||
|
||||
-mt,pthread)
|
||||
AC_MSG_CHECKING([whether pthreads work with -mt -lpthread])
|
||||
PTHREAD_CFLAGS="-mt"
|
||||
PTHREAD_LIBS="-lpthread"
|
||||
;;
|
||||
|
||||
-*)
|
||||
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 routine(void *a) { a = 0; }
|
||||
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
|
||||
|
||||
# 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 $host_os in
|
||||
solaris*)
|
||||
ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
|
||||
;;
|
||||
esac
|
||||
])
|
||||
AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
|
||||
test "x$ax_pthread_special_flags_added" != "xyes"],
|
||||
[PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
|
||||
ax_pthread_special_flags_added=yes])
|
||||
|
||||
AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
|
||||
[ax_cv_PTHREAD_PRIO_INHERIT],
|
||||
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
|
||||
[[int i = PTHREAD_PRIO_INHERIT;]])],
|
||||
[ax_cv_PTHREAD_PRIO_INHERIT=yes],
|
||||
[ax_cv_PTHREAD_PRIO_INHERIT=no])
|
||||
])
|
||||
AS_IF([test "x$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 $host_os in
|
||||
aix*)
|
||||
AS_CASE(["x/$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="${CC}_r"])],
|
||||
[AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])
|
||||
;;
|
||||
esac
|
||||
fi
|
||||
fi
|
||||
|
||||
test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
|
||||
|
||||
AC_SUBST([PTHREAD_LIBS])
|
||||
AC_SUBST([PTHREAD_CFLAGS])
|
||||
AC_SUBST([PTHREAD_CC])
|
||||
|
||||
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
|
||||
if test "x$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
|
||||
Loading…
Reference in New Issue
Block a user