[thirdparty/cups.git] / config-scripts / cups-threads.m4

dnl
dnl Threading stuff for CUPS.
dnl
dnl Copyright © 2020-2024 by OpenPrinting.
dnl Copyright © 2007-2017 by Apple Inc.
dnl Copyright © 1997-2005 by Easy Software Products, all rights reserved.
dnl
dnl Licensed under Apache License v2.0.  See the file "LICENSE" for more information.
dnl

have_pthread="no"
PTHREAD_FLAGS=""
AC_SUBST([PTHREAD_FLAGS])

AC_CHECK_HEADER([pthread.h], [
    AC_DEFINE([HAVE_PTHREAD_H], [1], [Do we have the <pthread.h> header?])
])

AS_IF([test x$ac_cv_header_pthread_h = xyes], [
    dnl Check various threading options for the platforms we support
    for flag in -lpthreads -lpthread -pthread; do
	AC_MSG_CHECKING([for pthread_create using $flag])
	SAVELIBS="$LIBS"
	LIBS="$flag $LIBS"
	AC_LINK_IFELSE([
	    AC_LANG_PROGRAM([[#include <pthread.h>]], [[
		pthread_create(0, 0, 0, 0);
	    ]])
	], [
	    have_pthread="yes"
	], [
	    LIBS="$SAVELIBS"
	])
	AC_MSG_RESULT([$have_pthread])

	AS_IF([test $have_pthread = yes], [
	    PTHREAD_FLAGS="-D_THREAD_SAFE -D_REENTRANT"

	    # Solaris requires -D_POSIX_PTHREAD_SEMANTICS to be POSIX-
	    # compliant... :(
	    AS_IF([test $host_os_name = sunos -o $host_os_name = solaris], [
		PTHREAD_FLAGS="$PTHREAD_FLAGS -D_POSIX_PTHREAD_SEMANTICS"
	    ])
	    break
	])
    done
])

AS_IF([test $have_pthread = no], [
    AC_MSG_ERROR([CUPS requires threading support.])
])
Commit	Line	Data
	1	dnl
	2	dnl Threading stuff for CUPS.
	3	dnl
	4	dnl Copyright © 2020-2024 by OpenPrinting.
	5	dnl Copyright © 2007-2017 by Apple Inc.
	6	dnl Copyright © 1997-2005 by Easy Software Products, all rights reserved.
	7	dnl
	8	dnl Licensed under Apache License v2.0. See the file "LICENSE" for more information.
	9	dnl
	10
	11	have_pthread="no"
	12	PTHREAD_FLAGS=""
	13	AC_SUBST([PTHREAD_FLAGS])
	14
	15	AC_CHECK_HEADER([pthread.h], [
	16	AC_DEFINE([HAVE_PTHREAD_H], [1], [Do we have the <pthread.h> header?])
	17	])
	18
	19	AS_IF([test x$ac_cv_header_pthread_h = xyes], [
	20	dnl Check various threading options for the platforms we support
	21	for flag in -lpthreads -lpthread -pthread; do
	22	AC_MSG_CHECKING([for pthread_create using $flag])
	23	SAVELIBS="$LIBS"
	24	LIBS="$flag $LIBS"
	25	AC_LINK_IFELSE([
	26	AC_LANG_PROGRAM([[#include <pthread.h>]], [[
	27	pthread_create(0, 0, 0, 0);
	28	]])
	29	], [
	30	have_pthread="yes"
	31	], [
	32	LIBS="$SAVELIBS"
	33	])
	34	AC_MSG_RESULT([$have_pthread])
	35
	36	AS_IF([test $have_pthread = yes], [
	37	PTHREAD_FLAGS="-D_THREAD_SAFE -D_REENTRANT"
	38
	39	# Solaris requires -D_POSIX_PTHREAD_SEMANTICS to be POSIX-
	40	# compliant... :(
	41	AS_IF([test $host_os_name = sunos -o $host_os_name = solaris], [
	42	PTHREAD_FLAGS="$PTHREAD_FLAGS -D_POSIX_PTHREAD_SEMANTICS"
	43	])
	44	break
	45	])
	46	done
	47	])
	48
	49	AS_IF([test $have_pthread = no], [
	50	AC_MSG_ERROR([CUPS requires threading support.])
	51	])