# ===========================================================================
-# http://www.gnu.org/software/autoconf-archive/ax_pthread.html
+# https://www.gnu.org/software/autoconf-archive/ax_pthread.html
# ===========================================================================
#
# SYNOPSIS
# 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.)
+# Also sets PTHREAD_CC and PTHREAD_CXX to any special C compiler that is
+# needed for multi-threaded programs (defaults to the value of CC
+# respectively CXX otherwise). (This is necessary on e.g. AIX to use the
+# special cc_r/CC_r compiler alias.)
#
# NOTE: You are assumed to not only compile your program with these flags,
# but also to link with them as well. For example, you might link with
# $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
+# $PTHREAD_CXX $CXXFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
#
# If you are only building threaded programs, you may wish to use these
# variables in your default LIBS, CFLAGS, and CC:
#
# LIBS="$PTHREAD_LIBS $LIBS"
# CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+# CXXFLAGS="$CXXFLAGS $PTHREAD_CFLAGS"
# CC="$PTHREAD_CC"
+# CXX="$PTHREAD_CXX"
#
# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
# has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
#
# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
# Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG>
+# Copyright (c) 2019 Marc Stevens <marc.stevens@cwi.nl>
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
-# with this program. If not, see <http://www.gnu.org/licenses/>.
+# with this program. If not, see <https://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
-#serial 23
+#serial 31
AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
AC_DEFUN([AX_PTHREAD], [
ax_pthread_save_CFLAGS="$CFLAGS"
ax_pthread_save_LIBS="$LIBS"
AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
+ AS_IF([test "x$PTHREAD_CXX" != "x"], [CXX="$PTHREAD_CXX"])
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
# (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.
+# Create a list of thread flags to try. Items with a "," contain both
+# C compiler flags (before ",") and linker flags (after ","). Other items
+# starting with a "-" are C compiler flags, and remaining items are
+# library names, except for "none" which indicates that we try without
+# any flags at all, and "pthread-config" which is a program returning
+# the flags for the Pth emulation library.
ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
# 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"
+ ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags"
;;
esac
+# Are we compiling with Clang?
+
+AC_CACHE_CHECK([whether $CC is Clang],
+ [ax_cv_PTHREAD_CLANG],
+ [ax_cv_PTHREAD_CLANG=no
+ # Note that Autoconf sets GCC=yes for Clang as well as GCC
+ if test "x$GCC" = "xyes"; then
+ AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG],
+ [/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
+# if defined(__clang__) && defined(__llvm__)
+ AX_PTHREAD_CC_IS_CLANG
+# endif
+ ],
+ [ax_cv_PTHREAD_CLANG=yes])
+ fi
+ ])
+ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
+
+
# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
+# Note that for GCC and Clang -pthread generally implies -lpthread,
+# except when -nostdlib is passed.
+# This is problematic using libtool to build C++ shared libraries with pthread:
+# [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
+# [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333
+# [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555
+# To solve this, first try -pthread together with -lpthread for GCC
+
AS_IF([test "x$GCC" = "xyes"],
- [ax_pthread_flags="-pthread -pthreads $ax_pthread_flags"])
+ [ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"])
+
+# Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first
+
+AS_IF([test "x$ax_pthread_clang" = "xyes"],
+ [ax_pthread_flags="-pthread,-lpthread -pthread"])
+
# The presence of a feature test macro requesting re-entrant function
# definitions is, on some systems, a strong hint that pthreads support is
[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="$ax_cv_PTHREAD_CLANG"
+if test "x$ax_pthread_ok" = "xno"; then
+for ax_pthread_try_flag in $ax_pthread_flags; do
+
+ case $ax_pthread_try_flag in
+ none)
+ AC_MSG_CHECKING([whether pthreads work without any flags])
+ ;;
+
+ *,*)
+ PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
+ PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
+ AC_MSG_CHECKING([whether pthreads work with "$PTHREAD_CFLAGS" and "$PTHREAD_LIBS"])
+ ;;
+
+ -*)
+ AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
+ PTHREAD_CFLAGS="$ax_pthread_try_flag"
+ ;;
+
+ pthread-config)
+ AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
+ AS_IF([test "x$ax_pthread_config" = "xno"], [continue])
+ PTHREAD_CFLAGS="`pthread-config --cflags`"
+ PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
+ ;;
+
+ *)
+ AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag])
+ PTHREAD_LIBS="-l$ax_pthread_try_flag"
+ ;;
+ esac
+
+ ax_pthread_save_CFLAGS="$CFLAGS"
+ ax_pthread_save_LIBS="$LIBS"
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+ LIBS="$PTHREAD_LIBS $LIBS"
+
+ # Check for various functions. We must include pthread.h,
+ # since some functions may be macros. (On the Sequent, we
+ # need a special flag -Kthread to make this header compile.)
+ # We check for pthread_join because it is in -lpthread on IRIX
+ # while pthread_create is in libc. We check for pthread_attr_init
+ # due to DEC craziness with -lpthreads. We check for
+ # pthread_cleanup_push because it is one of the few pthread
+ # functions on Solaris that doesn't have a non-functional libc stub.
+ # We try pthread_create on general principles.
+
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
+# if $ax_pthread_check_cond
+# error "$ax_pthread_check_macro must be defined"
+# endif
+ static void *some_global = NULL;
+ static void routine(void *a)
+ {
+ /* To avoid any unused-parameter or
+ unused-but-set-parameter warning. */
+ some_global = a;
+ }
+ static void *start_routine(void *a) { return a; }],
+ [pthread_t th; pthread_attr_t attr;
+ pthread_create(&th, 0, start_routine, 0);
+ pthread_join(th, 0);
+ pthread_attr_init(&attr);
+ pthread_cleanup_push(routine, 0);
+ pthread_cleanup_pop(0) /* ; */])],
+ [ax_pthread_ok=yes],
+ [])
+
+ CFLAGS="$ax_pthread_save_CFLAGS"
+ LIBS="$ax_pthread_save_LIBS"
+
+ AC_MSG_RESULT([$ax_pthread_ok])
+ AS_IF([test "x$ax_pthread_ok" = "xyes"], [break])
+
+ PTHREAD_LIBS=""
+ PTHREAD_CFLAGS=""
+done
+fi
-ax_pthread_clang_warning=no
# Clang needs special handling, because older versions handle the -pthread
# option in a rather... idiosyncratic way
# -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
# 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 "$ax_pthread_sed"`
+ ax_pthread_link_step=`AS_ECHO(["$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
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$ax_pthread_ok" = "xyes"; then
AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
[ax_cv_PTHREAD_PRIO_INHERIT],
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
- [[int i = PTHREAD_PRIO_INHERIT;]])],
+ [[int i = PTHREAD_PRIO_INHERIT;
+ return i;]])],
[ax_cv_PTHREAD_PRIO_INHERIT=yes],
[ax_cv_PTHREAD_PRIO_INHERIT=no])
])
[#handle absolute path differently from PATH based program lookup
AS_CASE(["x$CC"],
[x/*],
- [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])],
- [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])
+ [
+ AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])
+ AS_IF([test "x${CXX}" != "x"], [AS_IF([AS_EXECUTABLE_P([${CXX}_r])],[PTHREAD_CXX="${CXX}_r"])])
+ ],
+ [
+ AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])
+ AS_IF([test "x${CXX}" != "x"], [AC_CHECK_PROGS([PTHREAD_CXX],[${CXX}_r],[$CXX])])
+ ]
+ )
+ ])
;;
esac
fi
fi
test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
AC_SUBST([PTHREAD_LIBS])
AC_SUBST([PTHREAD_CFLAGS])
AC_SUBST([PTHREAD_CC])
+AC_SUBST([PTHREAD_CXX])
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test "x$ax_pthread_ok" = "xyes"; then
PBX_NO_BINARY_MODULES
PTHREAD_CFLAGS
PTHREAD_LIBS
+PTHREAD_CXX
PTHREAD_CC
ax_pthread_config
MD5
ax_pthread_save_LIBS="$LIBS"
if test "x$PTHREAD_CC" != "x"; then :
CC="$PTHREAD_CC"
+fi
+ if test "x$PTHREAD_CXX" != "x"; then :
+ CXX="$PTHREAD_CXX"
fi
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS"
# (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.
+# Create a list of thread flags to try. Items with a "," contain both
+# C compiler flags (before ",") and linker flags (after ","). Other items
+# starting with a "-" are C compiler flags, and remaining items are
+# library names, except for "none" which indicates that we try without
+# any flags at all, and "pthread-config" which is a program returning
+# the flags for the Pth emulation library.
ax_pthread_flags="pthreads none -Kthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
# 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 $ax_pthread_flags"
- ;;
-esac
-
-# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
-
-if test "x$GCC" = "xyes"; then :
- ax_pthread_flags="-pthread -pthreads $ax_pthread_flags"
-fi
-
-# 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*)
- ax_pthread_check_macro="_THREAD_SAFE"
- ;;
-
- *)
- ax_pthread_check_macro="--"
+ ax_pthread_flags="-mt,-lpthread pthread $ax_pthread_flags"
;;
esac
-if test "x$ax_pthread_check_macro" = "x--"; then :
- ax_pthread_check_cond=0
-else
- ax_pthread_check_cond="!defined($ax_pthread_check_macro)"
-fi
# Are we compiling with Clang?
$as_echo "$ax_cv_PTHREAD_CLANG" >&6; }
ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
-ax_pthread_clang_warning=no
-# Clang needs special handling, because older versions handle the -pthread
-# option in a rather... idiosyncratic way
+# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
-if test "x$ax_pthread_clang" = "xyes"; then
+# Note that for GCC and Clang -pthread generally implies -lpthread,
+# except when -nostdlib is passed.
+# This is problematic using libtool to build C++ shared libraries with pthread:
+# [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25460
+# [2] https://bugzilla.redhat.com/show_bug.cgi?id=661333
+# [3] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468555
+# To solve this, first try -pthread together with -lpthread for GCC
- # 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.)
+if test "x$GCC" = "xyes"; then :
+ ax_pthread_flags="-pthread,-lpthread -pthread -pthreads $ax_pthread_flags"
+fi
- # (Note 2: On some systems, notably Darwin, -pthread is not needed
- # to get POSIX threads support; the API is always present and
- # active. We could reasonably leave PTHREAD_CFLAGS empty. But
- # -pthread does define _REENTRANT, and while the Darwin headers
- # ignore this macro, third-party headers might not.)
+# Clang takes -pthread (never supported any other flag), but we'll try with -lpthread first
- PTHREAD_CFLAGS="-pthread"
- PTHREAD_LIBS=
+if test "x$ax_pthread_clang" = "xyes"; then :
+ ax_pthread_flags="-pthread,-lpthread -pthread"
+fi
- 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.
+# 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
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread" >&5
-$as_echo_n "checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread... " >&6; }
-if ${ax_cv_PTHREAD_CLANG_NO_WARN_FLAG+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- 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="$CFLAGS"
- for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
- if test "x$ax_pthread_try" = "xunknown"; then :
- break
-fi
- CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
- ac_link="$ax_pthread_save_ac_link"
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-int main(void){return 0;}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
- ac_link="$ax_pthread_2step_ac_link"
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-int main(void){return 0;}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
- break
-fi
-rm -f core conftest.err conftest.$ac_objext \
- conftest$ac_exeext conftest.$ac_ext
+case $host_os in
+ darwin* | hpux* | linux* | osf* | solaris*)
+ ax_pthread_check_macro="_REENTRANT"
+ ;;
-fi
-rm -f core conftest.err conftest.$ac_objext \
- conftest$ac_exeext conftest.$ac_ext
- done
- ac_link="$ax_pthread_save_ac_link"
- CFLAGS="$ax_pthread_save_CFLAGS"
- if test "x$ax_pthread_try" = "x"; then :
- ax_pthread_try=no
-fi
- ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
+ aix*)
+ ax_pthread_check_macro="_THREAD_SAFE"
+ ;;
+ *)
+ ax_pthread_check_macro="--"
+ ;;
+esac
+if test "x$ax_pthread_check_macro" = "x--"; then :
+ ax_pthread_check_cond=0
+else
+ ax_pthread_check_cond="!defined($ax_pthread_check_macro)"
fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&5
-$as_echo "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&6; }
- case "$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
$as_echo_n "checking whether pthreads work without any flags... " >&6; }
;;
- -mt,pthread)
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with -mt -lpthread" >&5
-$as_echo_n "checking whether pthreads work with -mt -lpthread... " >&6; }
- PTHREAD_CFLAGS="-mt"
- PTHREAD_LIBS="-lpthread"
+ *,*)
+ PTHREAD_CFLAGS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\1/"`
+ PTHREAD_LIBS=`echo $ax_pthread_try_flag | sed "s/^\(.*\),\(.*\)$/\2/"`
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with \"$PTHREAD_CFLAGS\" and \"$PTHREAD_LIBS\"" >&5
+$as_echo_n "checking whether pthreads work with \"$PTHREAD_CFLAGS\" and \"$PTHREAD_LIBS\"... " >&6; }
;;
-*)
# if $ax_pthread_check_cond
# error "$ax_pthread_check_macro must be defined"
# endif
- static void routine(void *a) { a = 0; }
+ static void *some_global = NULL;
+ static void routine(void *a)
+ {
+ /* To avoid any unused-parameter or
+ unused-but-set-parameter warning. */
+ some_global = a;
+ }
static void *start_routine(void *a) { return a; }
int
main ()
done
fi
+
+# Clang needs special handling, because older versions handle the -pthread
+# option in a rather... idiosyncratic way
+
+if test "x$ax_pthread_clang" = "xyes"; then
+
+ # Clang takes -pthread; it has never supported any other flag
+
+ # (Note 1: This will need to be revisited if a system that Clang
+ # supports has POSIX threads in a separate library. This tends not
+ # to be the way of modern systems, but it's conceivable.)
+
+ # (Note 2: On some systems, notably Darwin, -pthread is not needed
+ # to get POSIX threads support; the API is always present and
+ # active. We could reasonably leave PTHREAD_CFLAGS empty. But
+ # -pthread does define _REENTRANT, and while the Darwin headers
+ # ignore this macro, third-party headers might not.)
+
+ # However, older versions of Clang make a point of warning the user
+ # that, in an invocation where only linking and no compilation is
+ # taking place, the -pthread option has no effect ("argument unused
+ # during compilation"). They expect -pthread to be passed in only
+ # when source code is being compiled.
+ #
+ # Problem is, this is at odds with the way Automake and most other
+ # C build frameworks function, which is that the same flags used in
+ # compilation (CFLAGS) are also used in linking. Many systems
+ # supported by AX_PTHREAD require exactly this for POSIX threads
+ # support, and in fact it is often not straightforward to specify a
+ # flag that is used only in the compilation phase and not in
+ # linking. Such a scenario is extremely rare in practice.
+ #
+ # Even though use of the -pthread flag in linking would only print
+ # a warning, this can be a nuisance for well-run software projects
+ # that build with -Werror. So if the active version of Clang has
+ # this misfeature, we search for an option to squash it.
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread" >&5
+$as_echo_n "checking whether Clang needs flag to prevent \"argument unused\" warning when linking with -pthread... " >&6; }
+if ${ax_cv_PTHREAD_CLANG_NO_WARN_FLAG+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ 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="$CFLAGS"
+ for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
+ if test "x$ax_pthread_try" = "xunknown"; then :
+ break
+fi
+ CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
+ ac_link="$ax_pthread_save_ac_link"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+int main(void){return 0;}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ ac_link="$ax_pthread_2step_ac_link"
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+int main(void){return 0;}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+ break
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+
+fi
+rm -f core conftest.err conftest.$ac_objext \
+ conftest$ac_exeext conftest.$ac_ext
+ done
+ ac_link="$ax_pthread_save_ac_link"
+ CFLAGS="$ax_pthread_save_CFLAGS"
+ if test "x$ax_pthread_try" = "x"; then :
+ ax_pthread_try=no
+fi
+ ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&5
+$as_echo "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" >&6; }
+
+ case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
+ no | unknown) ;;
+ *) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
+ esac
+
+fi # $ax_pthread_clang = yes
+
+
+
# Various other checks:
if test "x$ax_pthread_ok" = "xyes"; then
ax_pthread_save_CFLAGS="$CFLAGS"
main ()
{
int i = PTHREAD_PRIO_INHERIT;
+ return i;
;
return 0;
}
#handle absolute path differently from PATH based program lookup
case "x$CC" in #(
x/*) :
- if as_fn_executable_p ${CC}_r; then :
+
+ if as_fn_executable_p ${CC}_r; then :
PTHREAD_CC="${CC}_r"
-fi ;; #(
+fi
+ if test "x${CXX}" != "x"; then :
+ if as_fn_executable_p ${CXX}_r; then :
+ PTHREAD_CXX="${CXX}_r"
+fi
+fi
+ ;; #(
*) :
- for ac_prog in ${CC}_r
+
+ for ac_prog in ${CC}_r
do
# Extract the first word of "$ac_prog", so it can be a program name with args.
set dummy $ac_prog; ac_word=$2
test -n "$PTHREAD_CC" && break
done
test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
- ;;
-esac ;; #(
+
+ if test "x${CXX}" != "x"; then :
+ for ac_prog in ${CXX}_r
+do
+ # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_PTHREAD_CXX+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test -n "$PTHREAD_CXX"; then
+ ac_cv_prog_PTHREAD_CXX="$PTHREAD_CXX" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+ IFS=$as_save_IFS
+ test -z "$as_dir" && as_dir=.
+ for ac_exec_ext in '' $ac_executable_extensions; do
+ if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+ ac_cv_prog_PTHREAD_CXX="$ac_prog"
+ $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+ break 2
+ fi
+done
+ done
+IFS=$as_save_IFS
+
+fi
+fi
+PTHREAD_CXX=$ac_cv_prog_PTHREAD_CXX
+if test -n "$PTHREAD_CXX"; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PTHREAD_CXX" >&5
+$as_echo "$PTHREAD_CXX" >&6; }
+else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+ test -n "$PTHREAD_CXX" && break
+done
+test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
+
+fi
+
+ ;;
+esac
+ ;; #(
*) :
;;
esac
fi
test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+test -n "$PTHREAD_CXX" || PTHREAD_CXX="$CXX"
+
_ACEOF
-fi
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether time.h and sys/time.h may both be included" >&5
-$as_echo_n "checking whether time.h and sys/time.h may both be included... " >&6; }
-if ${ac_cv_header_time+:} false; then :
- $as_echo_n "(cached) " >&6
-else
- cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-#include <sys/types.h>
-#include <sys/time.h>
-#include <time.h>
-
-int
-main ()
-{
-if ((struct tm *) 0)
-return 0;
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
- ac_cv_header_time=yes
-else
- ac_cv_header_time=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_time" >&5
-$as_echo "$ac_cv_header_time" >&6; }
-if test $ac_cv_header_time = yes; then
-
-$as_echo "#define TIME_WITH_SYS_TIME 1" >>confdefs.h
-
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether struct tm is in sys/time.h or time.h" >&5
projects / thirdparty / asterisk.git / commitdiff
