mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-29 19:30:36 +02:00
8b3fbac12a
autoconf macro archive, to fix pthread linking problem on Solaris 10, reported by Charles Gagnon.
310 lines
11 KiB
Text
310 lines
11 KiB
Text
dnl On the NeXT, #including <utime.h> doesn't give you a definition for
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dnl struct utime, unless you #define _POSIX_SOURCE.
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AC_DEFUN([GUILE_STRUCT_UTIMBUF], [
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AC_CACHE_CHECK([whether we need POSIX to get struct utimbuf],
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guile_cv_struct_utimbuf_needs_posix,
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[AC_TRY_CPP([
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#ifdef __EMX__
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#include <sys/utime.h>
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#else
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#include <utime.h>
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#endif
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struct utime blah;
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],
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guile_cv_struct_utimbuf_needs_posix=no,
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guile_cv_struct_utimbuf_needs_posix=yes)])
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if test "$guile_cv_struct_utimbuf_needs_posix" = yes; then
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AC_DEFINE([UTIMBUF_NEEDS_POSIX], 1,
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[Define this if <utime.h> doesn't define struct utimbuf unless
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_POSIX_SOURCE is defined. See GUILE_STRUCT_UTIMBUF in aclocal.m4.])
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fi])
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dnl
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dnl Apparently, at CMU they have a weird version of libc.h that is
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dnl installed in /usr/local/include and conflicts with unistd.h.
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dnl In these situations, we should not #include libc.h.
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dnl This test arranges to #define LIBC_H_WITH_UNISTD_H iff libc.h is
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dnl present on the system, and is safe to #include.
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dnl
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AC_DEFUN([GUILE_HEADER_LIBC_WITH_UNISTD],
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[
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AC_CHECK_HEADERS(libc.h unistd.h)
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AC_CACHE_CHECK(
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[whether libc.h and unistd.h can be included together],
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guile_cv_header_libc_with_unistd,
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[
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if test "$ac_cv_header_libc_h" = "no"; then
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guile_cv_header_libc_with_unistd="no"
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elif test "$ac_cv_header_unistd_h" = "no"; then
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guile_cv_header_libc_with_unistd="yes"
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else
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AC_TRY_COMPILE(
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[
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# include <libc.h>
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# include <unistd.h>
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],
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[],
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[guile_cv_header_libc_with_unistd=yes],
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[guile_cv_header_libc_with_unistd=no]
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)
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fi
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]
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)
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if test "$guile_cv_header_libc_with_unistd" = yes; then
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AC_DEFINE(LIBC_H_WITH_UNISTD_H, 1,
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[Define this if we should include <libc.h> when we've already
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included <unistd.h>. On some systems, they conflict, and libc.h
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should be omitted. See GUILE_HEADER_LIBC_WITH_UNISTD in
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aclocal.m4.])
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fi
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]
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)
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dnl This is needed when we want to check for the same function repeatedly
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dnl with other parameters, such as libraries, varying.
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dnl
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dnl GUILE_NAMED_CHECK_FUNC(FUNCTION, TESTNAME,
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dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
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AC_DEFUN([GUILE_NAMED_CHECK_FUNC],
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[AC_MSG_CHECKING([for $1])
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AC_CACHE_VAL(ac_cv_func_$1_$2,
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[AC_TRY_LINK(
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dnl Don't include <ctype.h> because on OSF/1 3.0 it includes <sys/types.h>
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dnl which includes <sys/select.h> which contains a prototype for
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dnl select. Similarly for bzero.
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[/* System header to define __stub macros and hopefully few prototypes,
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which can conflict with char $1(); below. */
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#include <assert.h>
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/* Override any gcc2 internal prototype to avoid an error. */
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#ifdef __cplusplus
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extern "C"
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#endif
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/* We use char because int might match the return type of a gcc2
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builtin and then its argument prototype would still apply. */
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char $1();
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], [
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/* The GNU C library defines this for functions which it implements
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to always fail with ENOSYS. Some functions are actually named
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something starting with __ and the normal name is an alias. */
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#if defined (__stub_$1) || defined (__stub___$1)
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choke me
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#else
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$1();
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#endif
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], eval "ac_cv_func_$1_$2=yes", eval "ac_cv_func_$1_$2=no")])
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if eval "test \"`echo '$ac_cv_func_'$1'_'$2`\" = yes"; then
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AC_MSG_RESULT(yes)
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ifelse([$3], , :, [$3])
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else
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AC_MSG_RESULT(no)
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ifelse([$4], , , [$4
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])dnl
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fi
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])
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dnl Available from the Autoconf Macro Archive at:
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dnl http://autoconf-archive.cryp.to/acx_pthread.html
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dnl
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AC_DEFUN([ACX_PTHREAD], [
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AC_REQUIRE([AC_CANONICAL_HOST])
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AC_LANG_SAVE
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AC_LANG_C
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acx_pthread_ok=no
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# We used to check for pthread.h first, but this fails if pthread.h
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# requires special compiler flags (e.g. on True64 or Sequent).
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# It gets checked for in the link test anyway.
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# First of all, check if the user has set any of the PTHREAD_LIBS,
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# etcetera environment variables, and if threads linking works using
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# them:
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if test x"$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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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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:
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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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