diff options
Diffstat (limited to 'build')
| -rw-r--r-- | build/ax-pthread.m4 | 283 | ||||
| -rw-r--r-- | build/configure.ac.pthread | 251 |
2 files changed, 251 insertions, 283 deletions
diff --git a/build/ax-pthread.m4 b/build/ax-pthread.m4 deleted file mode 100644 index bdae4771..00000000 --- a/build/ax-pthread.m4 +++ /dev/null @@ -1,283 +0,0 @@ -# =========================================================================== -# http://www.gnu.org/software/autoconf-archive/ax_pthread.html -# =========================================================================== -# -# SYNOPSIS -# -# AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) -# -# DESCRIPTION -# -# This macro figures out how to build C programs using POSIX threads. It -# sets the PTHREAD_LIBS output variable to the threads library and linker -# flags, and the PTHREAD_CFLAGS output variable to any special C compiler -# 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.) -# -# 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 -# $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS -# -# If you are only building threads programs, you may wish to use these -# variables in your default LIBS, CFLAGS, and CC: -# -# LIBS="$PTHREAD_LIBS $LIBS" -# CFLAGS="$CFLAGS $PTHREAD_CFLAGS" -# CC="$PTHREAD_CC" -# -# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant -# has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to that name -# (e.g. PTHREAD_CREATE_UNDETACHED on AIX). -# -# ACTION-IF-FOUND is a list of shell commands to run if a threads library -# is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it -# is not found. If ACTION-IF-FOUND is not specified, the default action -# will define HAVE_PTHREAD. -# -# Please let the authors know if this macro fails on any platform, or if -# you have any other suggestions or comments. This macro was based on work -# by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help -# from M. Frigo), as well as ac_pthread and hb_pthread macros posted by -# Alejandro Forero Cuervo to the autoconf macro repository. We are also -# grateful for the helpful feedback of numerous users. -# -# LICENSE -# -# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu> -# -# 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 -# Free Software Foundation, either version 3 of the License, or (at your -# option) any later version. -# -# This program is distributed in the hope that it will be useful, but -# WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General -# 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/>. -# -# As a special exception, the respective Autoconf Macro's copyright owner -# gives unlimited permission to copy, distribute and modify the configure -# scripts that are the output of Autoconf when processing the Macro. You -# need not follow the terms of the GNU General Public License when using -# or distributing such scripts, even though portions of the text of the -# Macro appear in them. The GNU General Public License (GPL) does govern -# all other use of the material that constitutes the Autoconf Macro. -# -# This special exception to the GPL applies to versions of the Autoconf -# Macro released by the Autoconf Archive. When you make and distribute a -# modified version of the Autoconf Macro, you may extend this special -# exception to the GPL to apply to your modified version as well. - -#serial 7 - -AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD]) -AC_DEFUN([AX_PTHREAD], [ -AC_REQUIRE([AC_CANONICAL_HOST]) -AC_LANG_SAVE -AC_LANG_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). -# It gets checked for in the link test anyway. - -# First of all, check if the user has set any of the PTHREAD_LIBS, -# etcetera environment variables, and if threads linking works using -# them: -if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then - save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS $PTHREAD_CFLAGS" - save_LIBS="$LIBS" - LIBS="$PTHREAD_LIBS $LIBS" - AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS]) - AC_TRY_LINK_FUNC(pthread_join, ax_pthread_ok=yes) - AC_MSG_RESULT($ax_pthread_ok) - if test x"$ax_pthread_ok" = xno; then - PTHREAD_LIBS="" - PTHREAD_CFLAGS="" - fi - LIBS="$save_LIBS" - CFLAGS="$save_CFLAGS" -fi - -# We must check for the threads library under a number of different -# names; the ordering is very important because some systems -# (e.g. DEC) have both -lpthread and -lpthreads, where one of the -# libraries is broken (non-POSIX). - -# Create a list of thread flags to try. Items starting with a "-" are -# C compiler flags, and other items are library names, except for "none" -# which indicates that we try without any flags at all, and "pthread-config" -# which is a program returning the flags for the Pth emulation library. - -ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config" - -# The ordering *is* (sometimes) important. Some notes on the -# individual items follow: - -# pthreads: AIX (must check this before -lpthread) -# none: in case threads are in libc; should be tried before -Kthread and -# other compiler flags to prevent continual compiler warnings -# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) -# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) -# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) -# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads) -# -pthreads: Solaris/gcc -# -mthreads: Mingw32/gcc, Lynx/gcc -# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it -# doesn't hurt to check since this sometimes defines pthreads too; -# also defines -D_REENTRANT) -# ... -mt is also the pthreads flag for HP/aCC -# pthread: Linux, etcetera -# --thread-safe: KAI C++ -# pthread-config: use pthread-config program (for GNU Pth library) - -case "${host_cpu}-${host_os}" in - *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. (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" - ;; - - *-darwin*) - acx_pthread_flags="-pthread $acx_pthread_flags" - ;; -esac - -if test x"$ax_pthread_ok" = xno; then -for flag in $ax_pthread_flags; do - - case $flag in - none) - AC_MSG_CHECKING([whether pthreads work without any flags]) - ;; - - -*) - AC_MSG_CHECKING([whether pthreads work with $flag]) - PTHREAD_CFLAGS="$flag" - ;; - - pthread-config) - AC_CHECK_PROG(ax_pthread_config, pthread-config, yes, no) - if test x"$ax_pthread_config" = xno; then continue; fi - PTHREAD_CFLAGS="`pthread-config --cflags`" - PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" - ;; - - *) - AC_MSG_CHECKING([for the pthreads library -l$flag]) - PTHREAD_LIBS="-l$flag" - ;; - esac - - save_LIBS="$LIBS" - save_CFLAGS="$CFLAGS" - LIBS="$PTHREAD_LIBS $LIBS" - CFLAGS="$CFLAGS $PTHREAD_CFLAGS" - - # Check for various functions. We must include pthread.h, - # since some functions may be macros. (On the Sequent, we - # need a special flag -Kthread to make this header compile.) - # We check for pthread_join because it is in -lpthread on IRIX - # while pthread_create is in libc. We check for pthread_attr_init - # due to DEC craziness with -lpthreads. We check for - # pthread_cleanup_push because it is one of the few pthread - # functions on Solaris that doesn't have a non-functional libc stub. - # We try pthread_create on general principles. - AC_TRY_LINK([#include <pthread.h> - static void routine(void* a) {a=0;} - static void* start_routine(void* a) {return a;}], - [pthread_t th; pthread_attr_t attr; - pthread_join(th, 0); - pthread_attr_init(&attr); - pthread_cleanup_push(routine, 0); - pthread_create(&th,0,start_routine,0); - pthread_cleanup_pop(0); ], - [ax_pthread_ok=yes]) - - LIBS="$save_LIBS" - CFLAGS="$save_CFLAGS" - - AC_MSG_RESULT($ax_pthread_ok) - if test "x$ax_pthread_ok" = xyes; then - break; - fi - - PTHREAD_LIBS="" - PTHREAD_CFLAGS="" -done -fi - -# Various other checks: -if test "x$ax_pthread_ok" = xyes; then - save_LIBS="$LIBS" - LIBS="$PTHREAD_LIBS $LIBS" - save_CFLAGS="$CFLAGS" - CFLAGS="$CFLAGS $PTHREAD_CFLAGS" - - # Detect AIX lossage: JOINABLE attribute is called UNDETACHED. - AC_MSG_CHECKING([for joinable pthread attribute]) - attr_name=unknown - for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do - AC_TRY_LINK([#include <pthread.h>], [int attr=$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_cpu}-${host_os}" in - *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";; - *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";; - esac - AC_MSG_RESULT(${flag}) - if test "x$flag" != xno; then - PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS" - fi - - LIBS="$save_LIBS" - CFLAGS="$save_CFLAGS" - - # More AIX lossage: must compile with xlc_r or cc_r - if test x"$GCC" != xyes; then - AC_CHECK_PROGS(PTHREAD_CC, xlc_r cc_r, ${CC}) - else - PTHREAD_CC=$CC - fi -else - PTHREAD_CC="$CC" -fi - -AC_SUBST(PTHREAD_LIBS) -AC_SUBST(PTHREAD_CFLAGS) -AC_SUBST(PTHREAD_CC) - -# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND: -if test x"$ax_pthread_ok" = xyes; then - ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1]) - : -else - ax_pthread_ok=no - $2 -fi -AC_LANG_RESTORE -])dnl AX_PTHREAD diff --git a/build/configure.ac.pthread b/build/configure.ac.pthread new file mode 100644 index 00000000..93c967a7 --- /dev/null +++ b/build/configure.ac.pthread @@ -0,0 +1,251 @@ +dnl Defines the macro CAIRO_CONFIGURE_PTHREAD to find a suitable +dnl pthread implementation. There are two levels of pthread conformance +dnl we are looking for: +dnl +dnl a) A minimal level denoted by -DCAIRO_HAS_PTHREAD=1: This level +dnl requires mutex and recursive mutexattr support. If possible we try +dnl to use weakly linked stubs from libc over the real pthread library. +dnl This level is required by the cairo library proper. If the user +dnl invokes configure with dnlenable-pthread=yes or +dnl dnlenable-pthread=always then we avoid trying to use weak stubs. +dnl +dnl b) A full level denoted by -DCAIRO_HAS_REAL_PTHREAD=1: This level +dnl requires full support from a real pthread library, including thread +dnl creation, joins, thread attribtues, etc. This level is required by +dnl multithreaded applications using cairo, such as the test suite +dnl binaries and cairo utilities. +dnl +dnl Usage: +dnl CAIRO_ENABLE(pthread, pthread, <default yes|no|auto|always>, +dnl [CAIRO_CONFIGURE_PTHREAD]) +dnl +dnl This should be invoked near the end of configure.ac so that +dnl the pthread specific CFLAGS and LIBS end up at the front +dnl of CAIRO_CFLAGS and CAIRO_LIBS dnl this helps ensure that we +dnl really do get non-weak symbols from the actual pthread library +dnl rather than possible stubs in other libraries. +dnl +dnl The user can override the choices made by +dnl CAIRO_CONFIGURE_PTHREAD by using dnlenable-pthread=yes and +dnl giving PTHREAD_CFLAGS and PTHREAD_LIBS to configure. +dnl +dnl Sets environment variables: +dnl use_pthread="yes" | "no (<errmsg>)" +dnl have_pthread="yes" | "no (<errmsg)" +dnl have_real_pthread="yes" | "no (<errmsg)" +dnl pthread_{CFLAGS,LIBS,REQUIRES} +dnl real_pthread_{CFLAGS,LIBS} +dnl +dnl Autoconfigured defines in config.h (conditional): +dnl CAIRO_HAS_PTHREAD +dnl CAIRO_HAS_REAL_PTHREAD +dnl + +dnl ----------------------------------------------------------------------- +dnl A program to test all the pthread features we need to be able to +dnl compile libcairo itself. We could test the features independently, +dnl but we need all of them anyway. +m4_define([libcairo_pthread_program],[dnl +#define _GNU_SOURCE /* for PTHREAD_MUTEX_INITIALIZER under linux */ +#include <pthread.h> + +pthread_mutex_t test_mutex_initializer = PTHREAD_MUTEX_INITIALIZER; +int test_mutex (void) +{ + int x = 0; + pthread_mutex_t mutex; + x |= pthread_mutex_init (&mutex, NULL); + x |= pthread_mutex_lock (&mutex); + x |= pthread_mutex_unlock (&mutex); + x |= pthread_mutex_destroy (&mutex); + return 0; +} + +int test_mutex_attr (void) +{ + int x = 0; + pthread_mutexattr_t attr; + pthread_mutex_t mutex; + x |= pthread_mutexattr_init (&attr); + x |= pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE); + x |= pthread_mutex_init (&mutex, &attr); + x |= pthread_mutex_lock (&mutex); + x |= pthread_mutex_unlock (&mutex); + x |= pthread_mutex_destroy (&mutex); + x |= pthread_mutexattr_destroy (&attr); + return x; +}]) + +dnl ----------------------------------------------------------------------- +dnl A program to test all the features we want to be able to run the test +dnl suite or other thready cairo applications that want real threads. +m4_define([testsuite_pthread_program],[dnl +libcairo_pthread_program + +pthread_once_t once_control = PTHREAD_ONCE_INIT; +void test_once_init (void) {} +int test_once (void) +{ + return pthread_once (&once_control, test_once_init); +} + +pthread_key_t test_specific_key; +int test_specific (void) +{ + int x = 0; + x |= pthread_key_create (&test_specific_key, NULL); + x |= pthread_setspecific (test_specific_key, NULL); + x |= pthread_getspecific (test_specific_key) != NULL; + return x; +} + +void cleaner (void *arg) { (void)arg; } + +void * +test_thread_main (void *arg) +{ + pthread_cleanup_push (cleaner, arg) + pthread_exit (arg); + pthread_cleanup_pop (1); + return arg; +} + +int +test_threads (void) +{ + int x = 0; + pthread_t thread; + pthread_attr_t attr; + void *arg = NULL; + x |= pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); + x |= pthread_create (&thread, &attr, test_thread_main, arg); + x |= pthread_equal (pthread_self(), thread); + x |= pthread_join (thread, &arg); + x |= pthread_attr_destroy (&attr); + return x; +}]) + +dnl ----------------------------------------------------------------------- + +dnl CAIRO_CHECK_PTHREAD(tag, cflags, libs, program, true-action, false-action) +dnl Set <tag>_{CFLAGS,LIBS} to {<cflags>,<libs>} if we can compile and link +dnl <program> with the given flags and libs. Execute <true-action> on +dnl success and <false-action> on failure. +AC_DEFUN([CAIRO_CHECK_PTHREAD],[dnl + CAIRO_CC_TRY_LINK_WITH_ENV_SILENT( + [CFLAGS="$2"; + LIBS="$3"], + [$4], + [$1_CFLAGS="$CFLAGS"; + $1_LIBS="$LIBS"; + $5], + [$1_CFLAGS=""; + $1_LIBS=""; + $6]) +]) + +dnl CAIRO_CONFIGURE_PTHREADS(): Look for pthreads. +dnl +dnl If the user specifies PTHREAD_CFLAGS and PTHREAD_LIBS then we use +dnl those. Otherwise we try CFLAGS=-D_REENTRANT and LIBS=-lpthread for +dnl full pthread support, and look for stubs in libc for the minimal +dnl pthread support. +dnl +dnl CFLAGS=-D_REENTRANT LIBS=-lpthread has been tested to work on: +dnl +dnl Solaris 9 (5.9) Sun C 5.8 Patch 121015-04 2007/01/10 +dnl OpenSolaris (5.11) Sun C 5.9 Patch 124868-08 2008/11/25 +dnl OpenSolaris (5.11) clang version 1.1 (trunk 90017) +dnl Tru64/OSF1 V5.1 Compaq C V6.5-003 +dnl Mac OS X 10.5.5 gcc 4.0.1 (Apple Inc. build 5465) +dnl Mac OS X 10.6 gcc 4.2.1 (Apple Inc. build 5659) +dnl FreeBSD 7.2 gcc 4.2 +dnl OpenBSD 4.5 gcc 3.3.5 (propolice) +dnl Debian Linux (Etch) gcc 4.3 +dnl +dnl Thread support is also in various libcs directly, so often using no +dnl flags at all works as well, but unfortunately Solaris 9 has +dnl practically _all_ of libpthread stubbed out in libc, so we cannot +dnl distinguish between a working libpthread and a stubbed out one by a +dnl link-only test. +dnl +dnl We also explicitly do not link to pthread-stubs or whatever other +dnl third-party stubs library, since that forces cairo clients to be +dnl extra careful when giving both libcairo and libpthread on the +dnl command line: the user would have to use "-lpthread -lcairo" rather +dnl than the more common "-lcairo -lpthread" to not accidentally use +dnl stubs pulled in by libcairo everywhere in the application. We +dnl might also need to have a way to teach pkg-config about library +dnl ordering constraints which aren't actual dependencies, and at this +dnl point it just starts doing my head in. +dnl +dnl If your unix-like doesn't work with the secret handshake +dnl -D_REENTRANT -lpthread and you can actually compile the rest of +dnl cairo just fine otherwise, please take a moment complain loudly +dnl to the cairo mailing list! +dnl +AC_DEFUN([CAIRO_CONFIGURE_PTHREAD],[dnl + dnl Try to use the user's PTHREAD_LIBS/CFLAGS + dnl if they're available. + if test "x$PTHREAD_CFLAGS" = "x"; then + PTHREAD_CFLAGS="-D_REENTRANT" + fi + if test "x$PTHREAD_LIBS" = "x"; then + PTHREAD_LIBS="-lpthread" + fi + + dnl First try to find the real pthreads. + CAIRO_CHECK_PTHREAD( + [real_pthread], [$PTHREAD_CFLAGS], [$PTHREAD_LIBS], + [testsuite_pthread_program], + [have_real_pthread=yes], + [have_real_pthread=no]) + if test "x$have_real_pthread" != "xyes"; then + dnl Give -pthread a go. + CAIRO_CHECK_PTHREAD( + [real_pthread], [-pthread], [], + [testsuite_pthread_program], + [have_real_pthread=yes], + [have_real_pthread="no (can't link with -lpthread or -pthread)"]) + fi + PTHREAD_CFLAGS= + PTHREAD_LIBS= + + dnl Check if we can use libc's stubs in libcairo. + dnl Only do this if the user hasn't explicitly enabled + dnl pthreads, but is relying on automatic configuration. + have_pthread="no" + if test "x$enable_pthread" != "xyes"; then + CAIRO_CHECK_PTHREAD( + [pthread], [-D_REENTRANT], [], + [libcairo_pthread_program], + [have_pthread=yes], + []) + fi + + dnl Default to using the real pthreads for libcairo. + if test "x$have_pthread" != "xyes"; then + have_pthread="$have_real_pthread"; + pthread_CFLAGS="$real_pthread_CFLAGS"; + pthread_LIBS="$real_pthread_LIBS"; + fi + + dnl Tell autoconf about the results. + if test "x$have_real_pthread" = "xyes"; then + AC_DEFINE([CAIRO_HAS_REAL_PTHREAD], 1, + [Define to 1 if we have full pthread support]) + fi + if test "x$have_pthread" = "xyes"; then + AC_DEFINE([CAIRO_HAS_PTHREAD], 1, + [Define to 1 f we have minimal pthread support]) + fi + + dnl Make sure we scored some pthreads. + if test "x$use_pthread" = "xyes" -a "x$have_pthread" != "xyes"; then + AC_MSG_ERROR([pthread requested but not found]) + fi + + dnl Set the output variables for CAIRO_ENABLE. + use_pthread="$have_pthread" + pthread_REQUIRES="" +]) |