1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/toolkit/crashreporter/google-breakpad/m4/ax_pthread.m4 Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,283 @@
1.4 +# ===========================================================================
1.5 +# http://www.nongnu.org/autoconf-archive/ax_pthread.html
1.6 +# ===========================================================================
1.7 +#
1.8 +# SYNOPSIS
1.9 +#
1.10 +# AX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])
1.11 +#
1.12 +# DESCRIPTION
1.13 +#
1.14 +# This macro figures out how to build C programs using POSIX threads. It
1.15 +# sets the PTHREAD_LIBS output variable to the threads library and linker
1.16 +# flags, and the PTHREAD_CFLAGS output variable to any special C compiler
1.17 +# flags that are needed. (The user can also force certain compiler
1.18 +# flags/libs to be tested by setting these environment variables.)
1.19 +#
1.20 +# Also sets PTHREAD_CC to any special C compiler that is needed for
1.21 +# multi-threaded programs (defaults to the value of CC otherwise). (This
1.22 +# is necessary on AIX to use the special cc_r compiler alias.)
1.23 +#
1.24 +# NOTE: You are assumed to not only compile your program with these flags,
1.25 +# but also link it with them as well. e.g. you should link with
1.26 +# $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
1.27 +#
1.28 +# If you are only building threads programs, you may wish to use these
1.29 +# variables in your default LIBS, CFLAGS, and CC:
1.30 +#
1.31 +# LIBS="$PTHREAD_LIBS $LIBS"
1.32 +# CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
1.33 +# CC="$PTHREAD_CC"
1.34 +#
1.35 +# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
1.36 +# has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to that name
1.37 +# (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
1.38 +#
1.39 +# ACTION-IF-FOUND is a list of shell commands to run if a threads library
1.40 +# is found, and ACTION-IF-NOT-FOUND is a list of commands to run it if it
1.41 +# is not found. If ACTION-IF-FOUND is not specified, the default action
1.42 +# will define HAVE_PTHREAD.
1.43 +#
1.44 +# Please let the authors know if this macro fails on any platform, or if
1.45 +# you have any other suggestions or comments. This macro was based on work
1.46 +# by SGJ on autoconf scripts for FFTW (http://www.fftw.org/) (with help
1.47 +# from M. Frigo), as well as ac_pthread and hb_pthread macros posted by
1.48 +# Alejandro Forero Cuervo to the autoconf macro repository. We are also
1.49 +# grateful for the helpful feedback of numerous users.
1.50 +#
1.51 +# LICENSE
1.52 +#
1.53 +# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
1.54 +#
1.55 +# This program is free software: you can redistribute it and/or modify it
1.56 +# under the terms of the GNU General Public License as published by the
1.57 +# Free Software Foundation, either version 3 of the License, or (at your
1.58 +# option) any later version.
1.59 +#
1.60 +# This program is distributed in the hope that it will be useful, but
1.61 +# WITHOUT ANY WARRANTY; without even the implied warranty of
1.62 +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
1.63 +# Public License for more details.
1.64 +#
1.65 +# You should have received a copy of the GNU General Public License along
1.66 +# with this program. If not, see <http://www.gnu.org/licenses/>.
1.67 +#
1.68 +# As a special exception, the respective Autoconf Macro's copyright owner
1.69 +# gives unlimited permission to copy, distribute and modify the configure
1.70 +# scripts that are the output of Autoconf when processing the Macro. You
1.71 +# need not follow the terms of the GNU General Public License when using
1.72 +# or distributing such scripts, even though portions of the text of the
1.73 +# Macro appear in them. The GNU General Public License (GPL) does govern
1.74 +# all other use of the material that constitutes the Autoconf Macro.
1.75 +#
1.76 +# This special exception to the GPL applies to versions of the Autoconf
1.77 +# Macro released by the Autoconf Archive. When you make and distribute a
1.78 +# modified version of the Autoconf Macro, you may extend this special
1.79 +# exception to the GPL to apply to your modified version as well.
1.80 +
1.81 +#serial 6
1.82 +
1.83 +AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
1.84 +AC_DEFUN([AX_PTHREAD], [
1.85 +AC_REQUIRE([AC_CANONICAL_HOST])
1.86 +AC_LANG_SAVE
1.87 +AC_LANG_C
1.88 +ax_pthread_ok=no
1.89 +
1.90 +# We used to check for pthread.h first, but this fails if pthread.h
1.91 +# requires special compiler flags (e.g. on True64 or Sequent).
1.92 +# It gets checked for in the link test anyway.
1.93 +
1.94 +# First of all, check if the user has set any of the PTHREAD_LIBS,
1.95 +# etcetera environment variables, and if threads linking works using
1.96 +# them:
1.97 +if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then
1.98 + save_CFLAGS="$CFLAGS"
1.99 + CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
1.100 + save_LIBS="$LIBS"
1.101 + LIBS="$PTHREAD_LIBS $LIBS"
1.102 + AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])
1.103 + AC_TRY_LINK_FUNC(pthread_join, ax_pthread_ok=yes)
1.104 + AC_MSG_RESULT($ax_pthread_ok)
1.105 + if test x"$ax_pthread_ok" = xno; then
1.106 + PTHREAD_LIBS=""
1.107 + PTHREAD_CFLAGS=""
1.108 + fi
1.109 + LIBS="$save_LIBS"
1.110 + CFLAGS="$save_CFLAGS"
1.111 +fi
1.112 +
1.113 +# We must check for the threads library under a number of different
1.114 +# names; the ordering is very important because some systems
1.115 +# (e.g. DEC) have both -lpthread and -lpthreads, where one of the
1.116 +# libraries is broken (non-POSIX).
1.117 +
1.118 +# Create a list of thread flags to try. Items starting with a "-" are
1.119 +# C compiler flags, and other items are library names, except for "none"
1.120 +# which indicates that we try without any flags at all, and "pthread-config"
1.121 +# which is a program returning the flags for the Pth emulation library.
1.122 +
1.123 +ax_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
1.124 +
1.125 +# The ordering *is* (sometimes) important. Some notes on the
1.126 +# individual items follow:
1.127 +
1.128 +# pthreads: AIX (must check this before -lpthread)
1.129 +# none: in case threads are in libc; should be tried before -Kthread and
1.130 +# other compiler flags to prevent continual compiler warnings
1.131 +# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)
1.132 +# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
1.133 +# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
1.134 +# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)
1.135 +# -pthreads: Solaris/gcc
1.136 +# -mthreads: Mingw32/gcc, Lynx/gcc
1.137 +# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
1.138 +# doesn't hurt to check since this sometimes defines pthreads too;
1.139 +# also defines -D_REENTRANT)
1.140 +# ... -mt is also the pthreads flag for HP/aCC
1.141 +# pthread: Linux, etcetera
1.142 +# --thread-safe: KAI C++
1.143 +# pthread-config: use pthread-config program (for GNU Pth library)
1.144 +
1.145 +case "${host_cpu}-${host_os}" in
1.146 + *solaris*)
1.147 +
1.148 + # On Solaris (at least, for some versions), libc contains stubbed
1.149 + # (non-functional) versions of the pthreads routines, so link-based
1.150 + # tests will erroneously succeed. (We need to link with -pthreads/-mt/
1.151 + # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather
1.152 + # a function called by this macro, so we could check for that, but
1.153 + # who knows whether they'll stub that too in a future libc.) So,
1.154 + # we'll just look for -pthreads and -lpthread first:
1.155 +
1.156 + ax_pthread_flags="-pthreads pthread -mt -pthread $ax_pthread_flags"
1.157 + ;;
1.158 +
1.159 + *-darwin*)
1.160 + acx_pthread_flags="-pthread $acx_pthread_flags"
1.161 + ;;
1.162 +esac
1.163 +
1.164 +if test x"$ax_pthread_ok" = xno; then
1.165 +for flag in $ax_pthread_flags; do
1.166 +
1.167 + case $flag in
1.168 + none)
1.169 + AC_MSG_CHECKING([whether pthreads work without any flags])
1.170 + ;;
1.171 +
1.172 + -*)
1.173 + AC_MSG_CHECKING([whether pthreads work with $flag])
1.174 + PTHREAD_CFLAGS="$flag"
1.175 + ;;
1.176 +
1.177 + pthread-config)
1.178 + AC_CHECK_PROG(ax_pthread_config, pthread-config, yes, no)
1.179 + if test x"$ax_pthread_config" = xno; then continue; fi
1.180 + PTHREAD_CFLAGS="`pthread-config --cflags`"
1.181 + PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
1.182 + ;;
1.183 +
1.184 + *)
1.185 + AC_MSG_CHECKING([for the pthreads library -l$flag])
1.186 + PTHREAD_LIBS="-l$flag"
1.187 + ;;
1.188 + esac
1.189 +
1.190 + save_LIBS="$LIBS"
1.191 + save_CFLAGS="$CFLAGS"
1.192 + LIBS="$PTHREAD_LIBS $LIBS"
1.193 + CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
1.194 +
1.195 + # Check for various functions. We must include pthread.h,
1.196 + # since some functions may be macros. (On the Sequent, we
1.197 + # need a special flag -Kthread to make this header compile.)
1.198 + # We check for pthread_join because it is in -lpthread on IRIX
1.199 + # while pthread_create is in libc. We check for pthread_attr_init
1.200 + # due to DEC craziness with -lpthreads. We check for
1.201 + # pthread_cleanup_push because it is one of the few pthread
1.202 + # functions on Solaris that doesn't have a non-functional libc stub.
1.203 + # We try pthread_create on general principles.
1.204 + AC_TRY_LINK([#include <pthread.h>
1.205 + static void routine(void* a) {a=0;}
1.206 + static void* start_routine(void* a) {return a;}],
1.207 + [pthread_t th; pthread_attr_t attr;
1.208 + pthread_join(th, 0);
1.209 + pthread_attr_init(&attr);
1.210 + pthread_cleanup_push(routine, 0);
1.211 + pthread_create(&th,0,start_routine,0);
1.212 + pthread_cleanup_pop(0); ],
1.213 + [ax_pthread_ok=yes])
1.214 +
1.215 + LIBS="$save_LIBS"
1.216 + CFLAGS="$save_CFLAGS"
1.217 +
1.218 + AC_MSG_RESULT($ax_pthread_ok)
1.219 + if test "x$ax_pthread_ok" = xyes; then
1.220 + break;
1.221 + fi
1.222 +
1.223 + PTHREAD_LIBS=""
1.224 + PTHREAD_CFLAGS=""
1.225 +done
1.226 +fi
1.227 +
1.228 +# Various other checks:
1.229 +if test "x$ax_pthread_ok" = xyes; then
1.230 + save_LIBS="$LIBS"
1.231 + LIBS="$PTHREAD_LIBS $LIBS"
1.232 + save_CFLAGS="$CFLAGS"
1.233 + CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
1.234 +
1.235 + # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
1.236 + AC_MSG_CHECKING([for joinable pthread attribute])
1.237 + attr_name=unknown
1.238 + for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
1.239 + AC_TRY_LINK([#include <pthread.h>], [int attr=$attr; return attr;],
1.240 + [attr_name=$attr; break])
1.241 + done
1.242 + AC_MSG_RESULT($attr_name)
1.243 + if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then
1.244 + AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,
1.245 + [Define to necessary symbol if this constant
1.246 + uses a non-standard name on your system.])
1.247 + fi
1.248 +
1.249 + AC_MSG_CHECKING([if more special flags are required for pthreads])
1.250 + flag=no
1.251 + case "${host_cpu}-${host_os}" in
1.252 + *-aix* | *-freebsd* | *-darwin*) flag="-D_THREAD_SAFE";;
1.253 + *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";;
1.254 + esac
1.255 + AC_MSG_RESULT(${flag})
1.256 + if test "x$flag" != xno; then
1.257 + PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"
1.258 + fi
1.259 +
1.260 + LIBS="$save_LIBS"
1.261 + CFLAGS="$save_CFLAGS"
1.262 +
1.263 + # More AIX lossage: must compile with xlc_r or cc_r
1.264 + if test x"$GCC" != xyes; then
1.265 + AC_CHECK_PROGS(PTHREAD_CC, xlc_r cc_r, ${CC})
1.266 + else
1.267 + PTHREAD_CC=$CC
1.268 + fi
1.269 +else
1.270 + PTHREAD_CC="$CC"
1.271 +fi
1.272 +
1.273 +AC_SUBST(PTHREAD_LIBS)
1.274 +AC_SUBST(PTHREAD_CFLAGS)
1.275 +AC_SUBST(PTHREAD_CC)
1.276 +
1.277 +# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
1.278 +if test x"$ax_pthread_ok" = xyes; then
1.279 + ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])
1.280 + :
1.281 +else
1.282 + ax_pthread_ok=no
1.283 + $2
1.284 +fi
1.285 +AC_LANG_RESTORE
1.286 +])dnl AX_PTHREAD
1.287 \ No newline at end of file
