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dnl Detection of the Pthread implementation flags and libraries
dnl Diego Pettenò <flameeyes-aBrp7R+bbdUdnm+yROfE0A@public.gmane.org> 2006-11-03
dnl
dnl CC_PTHREAD_FLAGS([ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl This macro checks for the Pthread flags to use to build
dnl with support for PTHREAD_LIBS and PTHREAD_CFLAGS variables
dnl used in FreeBSD ports.
dnl
dnl This macro is released as public domain, but please mail
dnl to flameeyes@gmail.com if you want to add support for a
dnl new case, or if you're going to use it, so that there will
dnl always be a version available.
AC_DEFUN([CC_PTHREAD_FLAGS], [
AC_REQUIRE([CC_CHECK_WERROR])
AC_ARG_VAR([PTHREAD_CFLAGS], [C compiler flags for Pthread support])
AC_ARG_VAR([PTHREAD_LIBS], [linker flags for Pthread support])
dnl if PTHREAD_* are not set, default to -pthread (GCC)
if test "${PTHREAD_CFLAGS-unset}" = "unset"; then
case $host in
*-hpux11*) PTHREAD_CFLAGS="" ;;
*-darwin*) PTHREAD_CFLAGS="" ;;
*) PTHREAD_CFLAGS="-pthread" ;;
esac
fi
if test "${PTHREAD_LIBS-unset}" = "unset"; then
case $host in
*-hpux11*) PTHREAD_LIBS="-lpthread" ;;
*-darwin*) PTHREAD_LIBS="" ;;
*) PTHREAD_LIBS="-pthread" ;;
esac
fi
AC_CACHE_CHECK([if $CC supports Pthread],
AS_TR_SH([cc_cv_pthreads]),
[ac_save_CFLAGS="$CFLAGS"
ac_save_LIBS="$LIBS"
CFLAGS="$CFLAGS $cc_cv_werror $PTHREAD_CFLAGS"
LIBS="$LIBS $PTHREAD_LIBS"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[#include <pthread.h>]],
[[pthread_create(NULL, NULL, NULL, NULL);]]
)],
[cc_cv_pthreads=yes],
[cc_cv_pthreads=no])
CFLAGS="$ac_save_CFLAGS"
LIBS="$ac_save_LIBS"
])
AC_SUBST([PTHREAD_LIBS])
AC_SUBST([PTHREAD_CFLAGS])
if test x$cc_cv_pthreads = xyes; then
ifelse([$1], , [:], [$1])
else
ifelse([$2], , [:], [$2])
fi
])
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