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Update ax_pthread.m4 to an experimental draft version from upstream.

Browse Source 
The current version is adding a spurious -pthread option on some Darwin
systems that don't need it, which leads to a bunch of "unrecognized option
'-pthread'" warnings. There is a proposed fix for that in the upstream
autoconf archive's bug tracker, see https://savannah.gnu.org/patch/?8186.
This commit updates our version of ax_pthread.m4 to the "draft2" version
proposed there by Daniel Richard G. I'm using our buildfarm to help Daniel
to test this, before he commits this to the upstream repository.
pull/14/head
Heikki Linnakangas 11 years ago
parent c53f73879f
commit a2932283c2
2 changed files with 244 additions and 132 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 180
      config/ax_pthread.m4
  2. 196
      configure

180
config/ax_pthread.m4
Unescape View File

@ -87,11 +87,12 @@
AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
AC_DEFUN([AX_PTHREAD], [
AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([AC_PROG_CC])
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 True64 or Sequent).
# 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,
@ -102,8 +103,8 @@ if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
save_LIBS="$LIBS"
LIBS="$PTHREAD_LIBS $LIBS"
AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
AC_TRY_LINK_FUNC([pthread_join], [ax_pthread_ok=yes])
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=""
@ -123,7 +124,7 @@ fi
# 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 -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mt -mthreads pthread --thread-safe pthread-config"
# The ordering *is* (sometimes) important. Some notes on the
# individual items follow:
@ -134,49 +135,76 @@ ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mt
# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
# -pthreads: Solaris/gcc
# -mthreads: Mingw32/gcc, Lynx/gcc
# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
# doesn't hurt to check since this sometimes defines pthreads too;
# also defines -D_REENTRANT)
# ... -mt is also the pthreads flag for HP/aCC
# 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)
# -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
case $host_os in
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
# Newer versions of Solaris require the "-mt -lpthread" pair, and we
# check that first. On some older versions, libc contains stubbed
# (non-functional) versions of the pthreads routines, so link-based
# tests will erroneously succeed. (We need to link with -pthreads/-mt/
# -lpthread.) (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 just look for -pthreads and -lpthread first:
# who knows whether they'll stub that too in a future libc.) So
# we'll look for -pthreads and -lpthread shortly thereafter.
ax_pthread_flags="-pthreads pthread -mt -pthread $ax_pthread_flags"
;;
darwin*)
ax_pthread_flags="-pthread $ax_pthread_flags"
ax_pthread_flags="-mt,pthread -pthreads -pthread pthread $ax_pthread_flags"
;;
esac
# Clang doesn't consider unrecognized options an error unless we specify
# -Werror. We throw in some extra Clang-specific options to ensure that
# this doesn't happen for GCC, which also accepts -Werror.
AC_MSG_CHECKING([if compiler needs -Werror to reject unknown flags])
save_CFLAGS="$CFLAGS"
ax_pthread_extra_flags="-Werror"
CFLAGS="$CFLAGS $ax_pthread_extra_flags -Wunknown-warning-option -Wsizeof-array-argument"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([int foo(void);],[foo()])],
[AC_MSG_RESULT([yes])],
[ax_pthread_extra_flags=
AC_MSG_RESULT([no])])
CFLAGS="$save_CFLAGS"
# Older versions of Clang only give a warning instead of an error for an
# unrecognized option, unless we specify -Werror. (We throw in some extra
# Clang warning flags for good measure.)
AC_CACHE_CHECK([if compiler needs certain flags to reject unknown flags],
[ax_cv_PTHREAD_REJECT_UNKNOWN],
[ax_cv_PTHREAD_REJECT_UNKNOWN=unknown
save_CFLAGS="$CFLAGS"
ax_pthread_extra_flags="-Wunknown-warning-option -Wunused-command-line-argument"
CFLAGS="$CFLAGS $ax_pthread_extra_flags -Wfoobaz -foobaz"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([int foo(void);],[foo()])],
[ax_cv_PTHREAD_REJECT_UNKNOWN="-Werror $ax_pthread_extra_flags"],
[ax_cv_PTHREAD_REJECT_UNKNOWN=no])
CFLAGS="$save_CFLAGS"
])
ax_pthread_extra_flags=
AS_IF([test "x$ax_cv_PTHREAD_REJECT_UNKNOWN" != "xno"],
[ax_pthread_extra_flags="$ax_cv_PTHREAD_REJECT_UNKNOWN"])
if test x"$ax_pthread_ok" = xno; then
for flag in $ax_pthread_flags; do
@ -186,6 +214,12 @@ for flag in $ax_pthread_flags; do
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 $flag])
PTHREAD_CFLAGS="$flag"
@ -251,46 +285,54 @@ if test "x$ax_pthread_ok" = xyes; then
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
# Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
AC_MSG_CHECKING([for joinable pthread attribute])
attr_name=unknown
for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
[int attr = $attr; return attr /* ; */])],
[attr_name=$attr; break],
[])
done
AC_MSG_RESULT([$attr_name])
if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], [$attr_name],
[Define to necessary symbol if this constant
uses a non-standard name on your system.])
fi
AC_MSG_CHECKING([if more special flags are required for pthreads])
flag=no
case ${host_os} in
aix* | freebsd* | darwin*) flag="-D_THREAD_SAFE";;
osf* | hpux*) flag="-D_REENTRANT";;
solaris*)
if test "$GCC" = "yes"; then
flag="-D_REENTRANT"
else
# TODO: What about Clang on Solaris?
flag="-mt -D_REENTRANT"
fi
;;
esac
AC_MSG_RESULT([$flag])
if test "x$flag" != xno; then
PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
fi
AC_CACHE_CHECK([for joinable pthread attribute],
[ax_cv_PTHREAD_JOINABLE_ATTR],
[ax_cv_PTHREAD_JOINABLE_ATTR=unknown
for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
[int attr = $attr; return attr /* ; */])],
[ax_cv_PTHREAD_JOINABLE_ATTR=$attr; break],
[])
done
])
AS_IF([test "$ax_cv_PTHREAD_JOINABLE_ATTR" != unknown && \
test "$ax_cv_PTHREAD_JOINABLE_ATTR" != PTHREAD_CREATE_JOINABLE],
[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.])])
AC_CACHE_CHECK([if more special flags are required for pthreads],
[ax_cv_PTHREAD_SPECIAL_FLAGS],
[ax_cv_PTHREAD_SPECIAL_FLAGS=no
ax_pthread_special_flags_added=no
AC_EGREP_CPP([AX_PTHREAD_NEED_SPECIAL_FLAG],
[
# if !defined(_REENTRANT) && !defined(_THREAD_SAFE)
AX_PTHREAD_NEED_SPECIAL_FLAG
# endif
],
[case $host_os in
aix* | freebsd*)
ax_cv_PTHREAD_SPECIAL_FLAGS="-D_THREAD_SAFE"
;;
darwin* | hpux* | osf* | solaris*)
ax_cv_PTHREAD_SPECIAL_FLAGS="-D_REENTRANT"
;;
esac
])
])
AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
test "x$ax_pthread_special_flags_added" != "xyes"],
[PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
ax_pthread_special_flags_added=yes])
AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
[ax_cv_PTHREAD_PRIO_INHERIT], [
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
[[int i = PTHREAD_PRIO_INHERIT;]])],
[ax_cv_PTHREAD_PRIO_INHERIT=yes],
[ax_cv_PTHREAD_PRIO_INHERIT=no])
[ax_cv_PTHREAD_PRIO_INHERIT],
[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
[[int i = PTHREAD_PRIO_INHERIT;]])],
[ax_cv_PTHREAD_PRIO_INHERIT=yes],
[ax_cv_PTHREAD_PRIO_INHERIT=no])
])
AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes"],
[AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])])

196
configure vendored
Unescape View File

@ -7799,6 +7799,7 @@ if test "$enable_thread_safety" = yes -a "$PORTNAME" != "win32"; then :
# then
ac_ext=c
ac_cpp='$CPP $CPPFLAGS'
ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@ -7808,7 +7809,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
ax_pthread_ok=no
# We used to check for pthread.h first, but this fails if pthread.h
# requires special compiler flags (e.g. on True64 or Sequent).
# requires special compiler flags (e.g. on Tru64 or Sequent).
# It gets checked for in the link test anyway.
# First of all, check if the user has set any of the PTHREAD_LIBS,
@ -7819,8 +7820,8 @@ if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
save_LIBS="$LIBS"
LIBS="$PTHREAD_LIBS $LIBS"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS" >&5
$as_echo_n "checking for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS... " >&6; }
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS" >&5
$as_echo_n "checking for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS... " >&6; }
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@ -7864,7 +7865,7 @@ fi
# 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 -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mt -mthreads pthread --thread-safe pthread-config"
# The ordering *is* (sometimes) important. Some notes on the
# individual items follow:
@ -7875,46 +7876,80 @@ ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mt
# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
# -pthreads: Solaris/gcc
# -mthreads: Mingw32/gcc, Lynx/gcc
# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
# doesn't hurt to check since this sometimes defines pthreads too;
# also defines -D_REENTRANT)
# ... -mt is also the pthreads flag for HP/aCC
# 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)
# -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
case $host_os in
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 $ax_pthread_flags"
;;
openedition*)
# IBM z/OS requires a feature-test macro to be defined in order to
# enable POSIX threads at all, so give the user a hint if this is
# not set. (We don't define these ourselves, as they can affect
# other portions of the system API in unpredictable ways.)
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
# if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
AX_PTHREAD_ZOS_MISSING
# endif
_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
$EGREP "AX_PTHREAD_ZOS_MISSING" >/dev/null 2>&1; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&5
$as_echo "$as_me: WARNING: IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support." >&2;}
fi
rm -f conftest*
;;
solaris*)
# On Solaris (at least, for some versions), libc contains stubbed
# Newer versions of Solaris require the "-mt -lpthread" pair, and we
# check that first. On some older versions, libc contains stubbed
# (non-functional) versions of the pthreads routines, so link-based
# tests will erroneously succeed. (We need to link with -pthreads/-mt/
# -lpthread.) (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 just look for -pthreads and -lpthread first:
# who knows whether they'll stub that too in a future libc.) So
# we'll look for -pthreads and -lpthread shortly thereafter.
ax_pthread_flags="-pthreads pthread -mt -pthread $ax_pthread_flags"
;;
darwin*)
ax_pthread_flags="-pthread $ax_pthread_flags"
ax_pthread_flags="-mt,pthread -pthreads -pthread pthread $ax_pthread_flags"
;;
esac
# Clang doesn't consider unrecognized options an error unless we specify
# -Werror. We throw in some extra Clang-specific options to ensure that
# this doesn't happen for GCC, which also accepts -Werror.
# Older versions of Clang only give a warning instead of an error for an
# unrecognized option, unless we specify -Werror. (We throw in some extra
# Clang warning flags for good measure.)
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler needs -Werror to reject unknown flags" >&5
$as_echo_n "checking if compiler needs -Werror to reject unknown flags... " >&6; }
save_CFLAGS="$CFLAGS"
ax_pthread_extra_flags="-Werror"
CFLAGS="$CFLAGS $ax_pthread_extra_flags -Wunknown-warning-option -Wsizeof-array-argument"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler needs certain flags to reject unknown flags" >&5
$as_echo_n "checking if compiler needs certain flags to reject unknown flags... " >&6; }
if ${ax_cv_PTHREAD_REJECT_UNKNOWN+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_cv_PTHREAD_REJECT_UNKNOWN=unknown
save_CFLAGS="$CFLAGS"
ax_pthread_extra_flags="-Wunknown-warning-option -Wunused-command-line-argument"
CFLAGS="$CFLAGS $ax_pthread_extra_flags -Wfoobaz -foobaz"
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
int foo(void);
int
@ -7926,15 +7961,20 @@ foo()
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
ax_cv_PTHREAD_REJECT_UNKNOWN="-Werror $ax_pthread_extra_flags"
else
ax_pthread_extra_flags=
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
ax_cv_PTHREAD_REJECT_UNKNOWN=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
CFLAGS="$save_CFLAGS"
CFLAGS="$save_CFLAGS"
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_REJECT_UNKNOWN" >&5
$as_echo "$ax_cv_PTHREAD_REJECT_UNKNOWN" >&6; }
ax_pthread_extra_flags=
if test "x$ax_cv_PTHREAD_REJECT_UNKNOWN" != "xno"; then :
ax_pthread_extra_flags="$ax_cv_PTHREAD_REJECT_UNKNOWN"
fi
if test x"$ax_pthread_ok" = xno; then
for flag in $ax_pthread_flags; do
@ -7945,6 +7985,13 @@ for 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"
;;
-*)
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether pthreads work with $flag" >&5
$as_echo_n "checking whether pthreads work with $flag... " >&6; }
@ -8064,9 +8111,12 @@ if test "x$ax_pthread_ok" = xyes; then
# Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for joinable pthread attribute" >&5
$as_echo_n "checking for joinable pthread attribute... " >&6; }
attr_name=unknown
for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
if ${ax_cv_PTHREAD_JOINABLE_ATTR+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_cv_PTHREAD_JOINABLE_ATTR=unknown
for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <pthread.h>
int
@ -8078,49 +8128,69 @@ int attr = $attr; return attr /* ; */
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
attr_name=$attr; break
ax_cv_PTHREAD_JOINABLE_ATTR=$attr; break
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
done
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $attr_name" >&5
$as_echo "$attr_name" >&6; }
if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
done
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_JOINABLE_ATTR" >&5
$as_echo "$ax_cv_PTHREAD_JOINABLE_ATTR" >&6; }
if test "$ax_cv_PTHREAD_JOINABLE_ATTR" != unknown && \
test "$ax_cv_PTHREAD_JOINABLE_ATTR" != PTHREAD_CREATE_JOINABLE; then :
cat >>confdefs.h <<_ACEOF
#define PTHREAD_CREATE_JOINABLE $attr_name
#define PTHREAD_CREATE_JOINABLE $ax_cv_PTHREAD_JOINABLE_ATTR
_ACEOF
fi
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if more special flags are required for pthreads" >&5
$as_echo_n "checking if more special flags are required for pthreads... " >&6; }
flag=no
case ${host_os} in
aix* | freebsd* | darwin*) flag="-D_THREAD_SAFE";;
osf* | hpux*) flag="-D_REENTRANT";;
solaris*)
if test "$GCC" = "yes"; then
flag="-D_REENTRANT"
else
# TODO: What about Clang on Solaris?
flag="-mt -D_REENTRANT"
fi
;;
esac
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $flag" >&5
$as_echo "$flag" >&6; }
if test "x$flag" != xno; then
PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
fi
if ${ax_cv_PTHREAD_SPECIAL_FLAGS+:} false; then :
$as_echo_n "(cached) " >&6
else
ax_cv_PTHREAD_SPECIAL_FLAGS=no
ax_pthread_special_flags_added=no
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
# if !defined(_REENTRANT) && !defined(_THREAD_SAFE)
AX_PTHREAD_NEED_SPECIAL_FLAG
# endif
_ACEOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
$EGREP "AX_PTHREAD_NEED_SPECIAL_FLAG" >/dev/null 2>&1; then :
case $host_os in
aix* | freebsd*)
ax_cv_PTHREAD_SPECIAL_FLAGS="-D_THREAD_SAFE"
;;
darwin* | hpux* | osf* | solaris*)
ax_cv_PTHREAD_SPECIAL_FLAGS="-D_REENTRANT"
;;
esac
fi
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ax_cv_PTHREAD_SPECIAL_FLAGS" >&5
$as_echo "$ax_cv_PTHREAD_SPECIAL_FLAGS" >&6; }
if test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
test "x$ax_pthread_special_flags_added" != "xyes"; then :
PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
ax_pthread_special_flags_added=yes
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for PTHREAD_PRIO_INHERIT" >&5
$as_echo_n "checking for PTHREAD_PRIO_INHERIT... " >&6; }
if ${ax_cv_PTHREAD_PRIO_INHERIT+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <pthread.h>
int

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