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[build-aux] Update Boost & check macros to latest serials

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This commit is contained in:
fanquake 2016-03-19 15:24:00 +08:00
parent f034bced26
commit cf5c786fc3
8 changed files with 379 additions and 203 deletions
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20
build-aux/m4/ax_boost_base.m4
View file

@ -33,7 +33,7 @@
# and this notice are preserved. This file is offered as-is, without any # and this notice are preserved. This file is offered as-is, without any
# warranty. # warranty.
#serial 23 #serial 26
AC_DEFUN([AX_BOOST_BASE], AC_DEFUN([AX_BOOST_BASE],
[ [
@ -95,8 +95,8 @@ if test "x$want_boost" = "xyes"; then
x86_64) x86_64)
libsubdirs="lib64 libx32 lib lib64" libsubdirs="lib64 libx32 lib lib64"
;; ;;
ppc64|s390x|sparc64|aarch64) ppc64|s390x|sparc64|aarch64|ppc64le)
libsubdirs="lib64 lib lib64" libsubdirs="lib64 lib lib64 ppc64le"
;; ;;
esac esac
@ -170,7 +170,7 @@ if test "x$want_boost" = "xyes"; then
AC_MSG_RESULT(yes) AC_MSG_RESULT(yes)
succeeded=yes succeeded=yes
found_system=yes found_system=yes
],[: ],[
]) ])
AC_LANG_POP([C++]) AC_LANG_POP([C++])
@ -179,6 +179,10 @@ if test "x$want_boost" = "xyes"; then
dnl if we found no boost with system layout we search for boost libraries dnl if we found no boost with system layout we search for boost libraries
dnl built and installed without the --layout=system option or for a staged(not installed) version dnl built and installed without the --layout=system option or for a staged(not installed) version
if test "x$succeeded" != "xyes"; then if test "x$succeeded" != "xyes"; then
CPPFLAGS="$CPPFLAGS_SAVED"
LDFLAGS="$LDFLAGS_SAVED"
BOOST_CPPFLAGS=
BOOST_LDFLAGS=
_version=0 _version=0
if test "$ac_boost_path" != ""; then if test "$ac_boost_path" != ""; then
if test -d "$ac_boost_path" && test -r "$ac_boost_path"; then if test -d "$ac_boost_path" && test -r "$ac_boost_path"; then
@ -191,6 +195,12 @@ if test "x$want_boost" = "xyes"; then
VERSION_UNDERSCORE=`echo $_version | sed 's/\./_/'` VERSION_UNDERSCORE=`echo $_version | sed 's/\./_/'`
BOOST_CPPFLAGS="-I$ac_boost_path/include/boost-$VERSION_UNDERSCORE" BOOST_CPPFLAGS="-I$ac_boost_path/include/boost-$VERSION_UNDERSCORE"
done done
dnl if nothing found search for layout used in Windows distributions
if test -z "$BOOST_CPPFLAGS"; then
if test -d "$ac_boost_path/boost" && test -r "$ac_boost_path/boost"; then
BOOST_CPPFLAGS="-I$ac_boost_path"
fi
fi
fi fi
else else
if test "$cross_compiling" != yes; then if test "$cross_compiling" != yes; then
@ -253,7 +263,7 @@ if test "x$want_boost" = "xyes"; then
AC_MSG_RESULT(yes) AC_MSG_RESULT(yes)
succeeded=yes succeeded=yes
found_system=yes found_system=yes
],[: ],[
]) ])
AC_LANG_POP([C++]) AC_LANG_POP([C++])
fi fi

7
build-aux/m4/ax_boost_program_options.m4
View file

@ -29,7 +29,7 @@
# and this notice are preserved. This file is offered as-is, without any # and this notice are preserved. This file is offered as-is, without any
# warranty. # warranty.
#serial 22 #serial 24
AC_DEFUN([AX_BOOST_PROGRAM_OPTIONS], AC_DEFUN([AX_BOOST_PROGRAM_OPTIONS],
[ [
@ -63,9 +63,9 @@ AC_DEFUN([AX_BOOST_PROGRAM_OPTIONS],
AC_CACHE_CHECK([whether the Boost::Program_Options library is available], AC_CACHE_CHECK([whether the Boost::Program_Options library is available],
ax_cv_boost_program_options, ax_cv_boost_program_options,
[AC_LANG_PUSH(C++) [AC_LANG_PUSH(C++)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/program_options.hpp> AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/program_options/errors.hpp>
]], ]],
[[boost::program_options::options_description generic("Generic options"); [[boost::program_options::error err("Error message");
return 0;]])], return 0;]])],
ax_cv_boost_program_options=yes, ax_cv_boost_program_options=no) ax_cv_boost_program_options=yes, ax_cv_boost_program_options=no)
AC_LANG_POP([C++]) AC_LANG_POP([C++])
@ -74,7 +74,6 @@ AC_DEFUN([AX_BOOST_PROGRAM_OPTIONS],
AC_DEFINE(HAVE_BOOST_PROGRAM_OPTIONS,,[define if the Boost::PROGRAM_OPTIONS library is available]) AC_DEFINE(HAVE_BOOST_PROGRAM_OPTIONS,,[define if the Boost::PROGRAM_OPTIONS library is available])
BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'` BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
if test "x$ax_boost_user_program_options_lib" = "x"; then if test "x$ax_boost_user_program_options_lib" = "x"; then
ax_lib=
for libextension in `ls $BOOSTLIBDIR/libboost_program_options*.so* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.so.*$;\1;'` `ls $BOOSTLIBDIR/libboost_program_options*.dylib* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.dylib.*$;\1;'` `ls $BOOSTLIBDIR/libboost_program_options*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.a.*$;\1;'` ; do for libextension in `ls $BOOSTLIBDIR/libboost_program_options*.so* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.so.*$;\1;'` `ls $BOOSTLIBDIR/libboost_program_options*.dylib* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.dylib.*$;\1;'` `ls $BOOSTLIBDIR/libboost_program_options*.a* 2>/dev/null | sed 's,.*/,,' | sed -e 's;^lib\(boost_program_options.*\)\.a.*$;\1;'` ; do
ax_lib=${libextension} ax_lib=${libextension}
AC_CHECK_LIB($ax_lib, exit, AC_CHECK_LIB($ax_lib, exit,

5
build-aux/m4/ax_boost_system.m4
View file

@ -31,7 +31,7 @@
# and this notice are preserved. This file is offered as-is, without any # and this notice are preserved. This file is offered as-is, without any
# warranty. # warranty.
#serial 17 #serial 18
AC_DEFUN([AX_BOOST_SYSTEM], AC_DEFUN([AX_BOOST_SYSTEM],
[ [
@ -68,9 +68,10 @@ AC_DEFUN([AX_BOOST_SYSTEM],
ax_cv_boost_system, ax_cv_boost_system,
[AC_LANG_PUSH([C++]) [AC_LANG_PUSH([C++])
CXXFLAGS_SAVE=$CXXFLAGS CXXFLAGS_SAVE=$CXXFLAGS
CXXFLAGS=
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/system/error_code.hpp>]], AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <boost/system/error_code.hpp>]],
[[boost::system::system_category]])], [[boost::system::error_category *a = 0;]])],
ax_cv_boost_system=yes, ax_cv_boost_system=no) ax_cv_boost_system=yes, ax_cv_boost_system=no)
CXXFLAGS=$CXXFLAGS_SAVE CXXFLAGS=$CXXFLAGS_SAVE
AC_LANG_POP([C++]) AC_LANG_POP([C++])

12
build-aux/m4/ax_check_compile_flag.m4
View file

@ -4,7 +4,7 @@
# #
# SYNOPSIS # SYNOPSIS
# #
# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS]) # AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
# #
# DESCRIPTION # DESCRIPTION
# #
@ -19,6 +19,8 @@
# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to # the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to
# force the compiler to issue an error when a bad flag is given. # force the compiler to issue an error when a bad flag is given.
# #
# INPUT gives an alternative input source to AC_COMPILE_IFELSE.
#
# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG. # macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
# #
@ -53,19 +55,19 @@
# modified version of the Autoconf Macro, you may extend this special # modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well. # exception to the GPL to apply to your modified version as well.
#serial 2 #serial 4
AC_DEFUN([AX_CHECK_COMPILE_FLAG], AC_DEFUN([AX_CHECK_COMPILE_FLAG],
[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX [AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
[AS_VAR_SET(CACHEVAR,[yes])], [AS_VAR_SET(CACHEVAR,[yes])],
[AS_VAR_SET(CACHEVAR,[no])]) [AS_VAR_SET(CACHEVAR,[no])])
_AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes], AS_VAR_IF(CACHEVAR,yes,
[m4_default([$2], :)], [m4_default([$2], :)],
[m4_default([$3], :)]) [m4_default([$3], :)])
AS_VAR_POPDEF([CACHEVAR])dnl AS_VAR_POPDEF([CACHEVAR])dnl

13
build-aux/m4/ax_check_link_flag.m4
View file

@ -4,7 +4,7 @@
# #
# SYNOPSIS # SYNOPSIS
# #
# AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS]) # AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
# #
# DESCRIPTION # DESCRIPTION
# #
@ -19,6 +19,8 @@
# EXTRA-FLAGS FLAG". This can for example be used to force the linker to # EXTRA-FLAGS FLAG". This can for example be used to force the linker to
# issue an error when a bad flag is given. # issue an error when a bad flag is given.
# #
# INPUT gives an alternative input source to AC_LINK_IFELSE.
#
# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
# macro in sync with AX_CHECK_{PREPROC,COMPILE}_FLAG. # macro in sync with AX_CHECK_{PREPROC,COMPILE}_FLAG.
# #
@ -53,18 +55,19 @@
# modified version of the Autoconf Macro, you may extend this special # modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well. # exception to the GPL to apply to your modified version as well.
#serial 2 #serial 4
AC_DEFUN([AX_CHECK_LINK_FLAG], AC_DEFUN([AX_CHECK_LINK_FLAG],
[AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl [AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl
AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [ AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [
ax_check_save_flags=$LDFLAGS ax_check_save_flags=$LDFLAGS
LDFLAGS="$LDFLAGS $4 $1" LDFLAGS="$LDFLAGS $4 $1"
AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_LINK_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
[AS_VAR_SET(CACHEVAR,[yes])], [AS_VAR_SET(CACHEVAR,[yes])],
[AS_VAR_SET(CACHEVAR,[no])]) [AS_VAR_SET(CACHEVAR,[no])])
LDFLAGS=$ax_check_save_flags]) LDFLAGS=$ax_check_save_flags])
AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes], AS_VAR_IF(CACHEVAR,yes,
[m4_default([$2], :)], [m4_default([$2], :)],
[m4_default([$3], :)]) [m4_default([$3], :)])
AS_VAR_POPDEF([CACHEVAR])dnl AS_VAR_POPDEF([CACHEVAR])dnl

12
build-aux/m4/ax_check_preproc_flag.m4
View file

@ -4,7 +4,7 @@
# #
# SYNOPSIS # SYNOPSIS
# #
# AX_CHECK_PREPROC_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS]) # AX_CHECK_PREPROC_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
# #
# DESCRIPTION # DESCRIPTION
# #
@ -19,6 +19,8 @@
# "CPPFLAGS EXTRA-FLAGS FLAG". This can for example be used to force the # "CPPFLAGS EXTRA-FLAGS FLAG". This can for example be used to force the
# preprocessor to issue an error when a bad flag is given. # preprocessor to issue an error when a bad flag is given.
# #
# INPUT gives an alternative input source to AC_PREPROC_IFELSE.
#
# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
# macro in sync with AX_CHECK_{COMPILE,LINK}_FLAG. # macro in sync with AX_CHECK_{COMPILE,LINK}_FLAG.
# #
@ -53,19 +55,19 @@
# modified version of the Autoconf Macro, you may extend this special # modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well. # exception to the GPL to apply to your modified version as well.
#serial 2 #serial 4
AC_DEFUN([AX_CHECK_PREPROC_FLAG], AC_DEFUN([AX_CHECK_PREPROC_FLAG],
[AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX [AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]cppflags_$4_$1])dnl AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]cppflags_$4_$1])dnl
AC_CACHE_CHECK([whether _AC_LANG preprocessor accepts $1], CACHEVAR, [ AC_CACHE_CHECK([whether _AC_LANG preprocessor accepts $1], CACHEVAR, [
ax_check_save_flags=$CPPFLAGS ax_check_save_flags=$CPPFLAGS
CPPFLAGS="$CPPFLAGS $4 $1" CPPFLAGS="$CPPFLAGS $4 $1"
AC_PREPROC_IFELSE([AC_LANG_PROGRAM()], AC_PREPROC_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
[AS_VAR_SET(CACHEVAR,[yes])], [AS_VAR_SET(CACHEVAR,[yes])],
[AS_VAR_SET(CACHEVAR,[no])]) [AS_VAR_SET(CACHEVAR,[no])])
CPPFLAGS=$ax_check_save_flags]) CPPFLAGS=$ax_check_save_flags])
AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes], AS_VAR_IF(CACHEVAR,yes,
[m4_default([$2], :)], [m4_default([$2], :)],
[m4_default([$3], :)]) [m4_default([$3], :)])
AS_VAR_POPDEF([CACHEVAR])dnl AS_VAR_POPDEF([CACHEVAR])dnl

8
build-aux/m4/ax_gcc_func_attribute.m4
View file

@ -31,6 +31,7 @@
# cold # cold
# const # const
# constructor # constructor
# constructor_priority for constructor attribute with priority
# deprecated # deprecated
# destructor # destructor
# dllexport # dllexport
@ -73,7 +74,7 @@
# and this notice are preserved. This file is offered as-is, without any # and this notice are preserved. This file is offered as-is, without any
# warranty. # warranty.
#serial 2 #serial 3
AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [ AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
AS_VAR_PUSHDEF([ac_var], [ax_cv_have_func_attribute_$1]) AS_VAR_PUSHDEF([ac_var], [ax_cv_have_func_attribute_$1])
@ -103,6 +104,9 @@ AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
[const], [ [const], [
int foo( void ) __attribute__(($1)); int foo( void ) __attribute__(($1));
], ],
[constructor_priority], [
int foo( void ) __attribute__((__constructor__(65535/2)));
],
[constructor], [ [constructor], [
int foo( void ) __attribute__(($1)); int foo( void ) __attribute__(($1));
], ],
@ -180,6 +184,8 @@ AC_DEFUN([AX_GCC_FUNC_ATTRIBUTE], [
[visibility], [ [visibility], [
int foo_def( void ) __attribute__(($1("default"))); int foo_def( void ) __attribute__(($1("default")));
int foo_hid( void ) __attribute__(($1("hidden"))); int foo_hid( void ) __attribute__(($1("hidden")));
int foo_int( void ) __attribute__(($1("internal")));
int foo_pro( void ) __attribute__(($1("protected")));
], ],
[warning], [ [warning], [
int foo( void ) __attribute__(($1(""))); int foo( void ) __attribute__(($1("")));

505
build-aux/m4/ax_pthread.m4
View file

@ -19,10 +19,10 @@
# is necessary on AIX to use the special cc_r compiler alias.) # 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, # NOTE: You are assumed to not only compile your program with these flags,
# but also link it with them as well. e.g. you should link with # but also to link with them as well. For example, you might link with
# $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS # $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
# #
# If you are only building threads programs, you may wish to use these # If you are only building threaded programs, you may wish to use these
# variables in your default LIBS, CFLAGS, and CC: # variables in your default LIBS, CFLAGS, and CC:
# #
# LIBS="$PTHREAD_LIBS $LIBS" # LIBS="$PTHREAD_LIBS $LIBS"
@ -30,8 +30,8 @@
# CC="$PTHREAD_CC" # CC="$PTHREAD_CC"
# #
# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant # In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
# has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to that name # has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
# (e.g. PTHREAD_CREATE_UNDETACHED on AIX). # that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
# #
# Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the # Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the
# PTHREAD_PRIO_INHERIT symbol is defined when compiling with # PTHREAD_PRIO_INHERIT symbol is defined when compiling with
@ -82,35 +82,40 @@
# modified version of the Autoconf Macro, you may extend this special # modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well. # exception to the GPL to apply to your modified version as well.
#serial 21 #serial 22
AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD]) AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
AC_DEFUN([AX_PTHREAD], [ AC_DEFUN([AX_PTHREAD], [
AC_REQUIRE([AC_CANONICAL_HOST]) AC_REQUIRE([AC_CANONICAL_HOST])
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_PROG_SED])
AC_LANG_PUSH([C]) AC_LANG_PUSH([C])
ax_pthread_ok=no ax_pthread_ok=no
# We used to check for pthread.h first, but this fails if pthread.h # We used to check for pthread.h first, but this fails if pthread.h
# requires special compiler flags (e.g. on True64 or Sequent). # requires special compiler flags (e.g. on Tru64 or Sequent).
# It gets checked for in the link test anyway. # It gets checked for in the link test anyway.
# First of all, check if the user has set any of the PTHREAD_LIBS, # First of all, check if the user has set any of the PTHREAD_LIBS,
# etcetera environment variables, and if threads linking works using # etcetera environment variables, and if threads linking works using
# them: # them:
if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then if test "x$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
save_CFLAGS="$CFLAGS" ax_pthread_save_CC="$CC"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS" ax_pthread_save_CFLAGS="$CFLAGS"
save_LIBS="$LIBS" ax_pthread_save_LIBS="$LIBS"
LIBS="$PTHREAD_LIBS $LIBS" AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS]) CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
AC_TRY_LINK_FUNC([pthread_join], [ax_pthread_ok=yes]) LIBS="$PTHREAD_LIBS $LIBS"
AC_MSG_RESULT([$ax_pthread_ok]) AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
if test x"$ax_pthread_ok" = xno; then AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes])
PTHREAD_LIBS="" AC_MSG_RESULT([$ax_pthread_ok])
PTHREAD_CFLAGS="" if test "x$ax_pthread_ok" = "xno"; then
fi PTHREAD_LIBS=""
LIBS="$save_LIBS" PTHREAD_CFLAGS=""
CFLAGS="$save_CFLAGS" fi
CC="$ax_pthread_save_CC"
CFLAGS="$ax_pthread_save_CFLAGS"
LIBS="$ax_pthread_save_LIBS"
fi fi
# We must check for the threads library under a number of different # We must check for the threads library under a number of different
@ -123,7 +128,7 @@ fi
# which indicates that we try without any flags at all, and "pthread-config" # 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. # 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 -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
# The ordering *is* (sometimes) important. Some notes on the # The ordering *is* (sometimes) important. Some notes on the
# individual items follow: # individual items follow:
@ -132,186 +137,334 @@ ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mt
# none: in case threads are in libc; should be tried before -Kthread and # none: in case threads are in libc; should be tried before -Kthread and
# other compiler flags to prevent continual compiler warnings # other compiler flags to prevent continual compiler warnings
# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) # (Note: HP C rejects this with "bad form for `-t' option")
# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads) # -pthreads: Solaris/gcc (Note: HP C also rejects)
# -pthreads: Solaris/gcc
# -mthreads: Mingw32/gcc, Lynx/gcc
# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
# doesn't hurt to check since this sometimes defines pthreads too; # doesn't hurt to check since this sometimes defines pthreads and
# also defines -D_REENTRANT) # -D_REENTRANT too), HP C (must be checked before -lpthread, which
# ... -mt is also the pthreads flag for HP/aCC # 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 # pthread: Linux, etcetera
# --thread-safe: KAI C++ # --thread-safe: KAI C++
# pthread-config: use pthread-config program (for GNU Pth library) # pthread-config: use pthread-config program (for GNU Pth library)
case ${host_os} in case $host_os in
solaris*)
# On Solaris (at least, for some versions), libc contains stubbed freebsd*)
# (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:
ax_pthread_flags="-pthreads pthread -mt -pthread $ax_pthread_flags" # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
;; # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
darwin*) ax_pthread_flags="-kthread lthread $ax_pthread_flags"
ax_pthread_flags="-pthread $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 $ax_pthread_flags"
;;
esac esac
# Clang doesn't consider unrecognized options an error unless we specify # GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
# -Werror. We throw in some extra Clang-specific options to ensure that
# this doesn't happen for GCC, which also accepts -Werror.
AC_MSG_CHECKING([if compiler needs -Werror to reject unknown flags]) AS_IF([test "x$GCC" = "xyes"],
save_CFLAGS="$CFLAGS" [ax_pthread_flags="-pthread -pthreads $ax_pthread_flags"])
ax_pthread_extra_flags="-Werror"
CFLAGS="$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"
if test x"$ax_pthread_ok" = xno; then # The presence of a feature test macro requesting re-entrant function
for flag in $ax_pthread_flags; do # definitions is, on some systems, a strong hint that pthreads support is
# correctly enabled
case $flag in case $host_os in
none) darwin* | hpux* | linux* | osf* | solaris*)
AC_MSG_CHECKING([whether pthreads work without any flags]) ax_pthread_check_macro="_REENTRANT"
;; ;;
-*) aix* | freebsd*)
AC_MSG_CHECKING([whether pthreads work with $flag]) ax_pthread_check_macro="_THREAD_SAFE"
PTHREAD_CFLAGS="$flag" ;;
;;
pthread-config) *)
AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no]) ax_pthread_check_macro="--"
if test x"$ax_pthread_config" = xno; then continue; fi ;;
PTHREAD_CFLAGS="`pthread-config --cflags`" esac
PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" AS_IF([test "x$ax_pthread_check_macro" = "x--"],
;; [ax_pthread_check_cond=0],
[ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])
*) # Are we compiling with Clang?
AC_MSG_CHECKING([for the pthreads library -l$flag])
PTHREAD_LIBS="-l$flag"
;;
esac
save_LIBS="$LIBS" AC_CACHE_CHECK([whether $CC is Clang],
save_CFLAGS="$CFLAGS" [ax_cv_PTHREAD_CLANG],
LIBS="$PTHREAD_LIBS $LIBS" [ax_cv_PTHREAD_CLANG=no
CFLAGS="$CFLAGS $PTHREAD_CFLAGS $ax_pthread_extra_flags" # Note that Autoconf sets GCC=yes for Clang as well as GCC
if test "x$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="$ax_cv_PTHREAD_CLANG"
# Check for various functions. We must include pthread.h, ax_pthread_clang_warning=no
# since some functions may be macros. (On the Sequent, we
# need a special flag -Kthread to make this header compile.)
# We check for pthread_join because it is in -lpthread on IRIX
# while pthread_create is in libc. We check for pthread_attr_init
# due to DEC craziness with -lpthreads. We check for
# pthread_cleanup_push because it is one of the few pthread
# functions on Solaris that doesn't have a non-functional libc stub.
# We try pthread_create on general principles.
AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
static void routine(void *a) { a = 0; }
static void *start_routine(void *a) { return a; }],
[pthread_t th; pthread_attr_t attr;
pthread_create(&th, 0, start_routine, 0);
pthread_join(th, 0);
pthread_attr_init(&attr);
pthread_cleanup_push(routine, 0);
pthread_cleanup_pop(0) /* ; */])],
[ax_pthread_ok=yes],
[])
LIBS="$save_LIBS" # Clang needs special handling, because older versions handle the -pthread
CFLAGS="$save_CFLAGS" # option in a rather... idiosyncratic way
AC_MSG_RESULT([$ax_pthread_ok]) if test "x$ax_pthread_clang" = "xyes"; then
if test "x$ax_pthread_ok" = xyes; then
break;
fi
PTHREAD_LIBS="" # Clang takes -pthread; it has never supported any other flag
PTHREAD_CFLAGS=""
# (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 done
fi fi
# Various other checks: # Various other checks:
if test "x$ax_pthread_ok" = xyes; then if test "x$ax_pthread_ok" = "xyes"; then
save_LIBS="$LIBS" ax_pthread_save_CFLAGS="$CFLAGS"
LIBS="$PTHREAD_LIBS $LIBS" ax_pthread_save_LIBS="$LIBS"
save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
CFLAGS="$CFLAGS $PTHREAD_CFLAGS" LIBS="$PTHREAD_LIBS $LIBS"
# Detect AIX lossage: JOINABLE attribute is called UNDETACHED. # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
AC_MSG_CHECKING([for joinable pthread attribute]) AC_CACHE_CHECK([for joinable pthread attribute],
attr_name=unknown [ax_cv_PTHREAD_JOINABLE_ATTR],
for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do [ax_cv_PTHREAD_JOINABLE_ATTR=unknown
AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>], for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
[int attr = $attr; return attr /* ; */])], AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
[attr_name=$attr; break], [int attr = $ax_pthread_attr; return attr /* ; */])],
[]) [ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break],
done [])
AC_MSG_RESULT([$attr_name]) done
if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then ])
AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE], [$attr_name], AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
[Define to necessary symbol if this constant test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
uses a non-standard name on your system.]) test "x$ax_pthread_joinable_attr_defined" != "xyes"],
fi [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_MSG_CHECKING([if more special flags are required for pthreads]) AC_CACHE_CHECK([whether more special flags are required for pthreads],
flag=no [ax_cv_PTHREAD_SPECIAL_FLAGS],
case ${host_os} in [ax_cv_PTHREAD_SPECIAL_FLAGS=no
aix* | freebsd* | darwin*) flag="-D_THREAD_SAFE";; case $host_os in
osf* | hpux*) flag="-D_REENTRANT";; solaris*)
solaris*) ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
if test "$GCC" = "yes"; then ;;
flag="-D_REENTRANT" esac
else ])
# TODO: What about Clang on Solaris? AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
flag="-mt -D_REENTRANT" test "x$ax_pthread_special_flags_added" != "xyes"],
fi [PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
;; ax_pthread_special_flags_added=yes])
esac
AC_MSG_RESULT([$flag])
if test "x$flag" != xno; then
PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
fi
AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT], AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
[ax_cv_PTHREAD_PRIO_INHERIT], [ [ax_cv_PTHREAD_PRIO_INHERIT],
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]], [AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
[[int i = PTHREAD_PRIO_INHERIT;]])], [[int i = PTHREAD_PRIO_INHERIT;]])],
[ax_cv_PTHREAD_PRIO_INHERIT=yes], [ax_cv_PTHREAD_PRIO_INHERIT=yes],
[ax_cv_PTHREAD_PRIO_INHERIT=no]) [ax_cv_PTHREAD_PRIO_INHERIT=no])
]) ])
AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes"], AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
[AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])]) test "x$ax_pthread_prio_inherit_defined" != "xyes"],
[AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])
ax_pthread_prio_inherit_defined=yes
])
LIBS="$save_LIBS" CFLAGS="$ax_pthread_save_CFLAGS"
CFLAGS="$save_CFLAGS" LIBS="$ax_pthread_save_LIBS"
# More AIX lossage: compile with *_r variant # More AIX lossage: compile with *_r variant
if test "x$GCC" != xyes; then if test "x$GCC" != "xyes"; then
case $host_os in case $host_os in
aix*) aix*)
AS_CASE(["x/$CC"], AS_CASE(["x/$CC"],
[x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6], [x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
[#handle absolute path differently from PATH based program lookup [#handle absolute path differently from PATH based program lookup
AS_CASE(["x$CC"], AS_CASE(["x$CC"],
[x/*], [x/*],
[AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])], [AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])],
[AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])]) [AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])
;; ;;
esac esac
fi fi
fi fi
test -n "$PTHREAD_CC" || PTHREAD_CC="$CC" test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
@ -321,12 +474,12 @@ AC_SUBST([PTHREAD_CFLAGS])
AC_SUBST([PTHREAD_CC]) AC_SUBST([PTHREAD_CC])
# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: # Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
if test x"$ax_pthread_ok" = xyes; then 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]) ifelse([$1],,[AC_DEFINE([HAVE_PTHREAD],[1],[Define if you have POSIX threads libraries and header files.])],[$1])
: :
else else
ax_pthread_ok=no ax_pthread_ok=no
$2 $2
fi fi
AC_LANG_POP AC_LANG_POP
])dnl AX_PTHREAD ])dnl AX_PTHREAD