--- /dev/null
+##### http://autoconf-archive.cryp.to/acx_pthread.html\r
+#\r
+# SYNOPSIS\r
+#\r
+# ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]])\r
+#\r
+# DESCRIPTION\r
+#\r
+# This macro figures out how to build C programs using POSIX threads.\r
+# It sets the PTHREAD_LIBS output variable to the threads library and\r
+# linker flags, and the PTHREAD_CFLAGS output variable to any special\r
+# C compiler flags that are needed. (The user can also force certain\r
+# compiler flags/libs to be tested by setting these environment\r
+# variables.)\r
+#\r
+# Also sets PTHREAD_CC to any special C compiler that is needed for\r
+# multi-threaded programs (defaults to the value of CC otherwise).\r
+# (This is necessary on AIX to use the special cc_r compiler alias.)\r
+#\r
+# NOTE: You are assumed to not only compile your program with these\r
+# flags, but also link it with them as well. e.g. you should link\r
+# with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS\r
+# $LIBS\r
+#\r
+# If you are only building threads programs, you may wish to use\r
+# these variables in your default LIBS, CFLAGS, and CC:\r
+#\r
+# LIBS="$PTHREAD_LIBS $LIBS"\r
+# CFLAGS="$CFLAGS $PTHREAD_CFLAGS"\r
+# CC="$PTHREAD_CC"\r
+#\r
+# In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute\r
+# constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to\r
+# that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).\r
+#\r
+# ACTION-IF-FOUND is a list of shell commands to run if a threads\r
+# library is found, and ACTION-IF-NOT-FOUND is a list of commands to\r
+# run it if it is not found. If ACTION-IF-FOUND is not specified, the\r
+# default action will define HAVE_PTHREAD.\r
+#\r
+# Please let the authors know if this macro fails on any platform, or\r
+# if you have any other suggestions or comments. This macro was based\r
+# on work by SGJ on autoconf scripts for FFTW (http://www.fftw.org/)\r
+# (with help from M. Frigo), as well as ac_pthread and hb_pthread\r
+# macros posted by Alejandro Forero Cuervo to the autoconf macro\r
+# repository. We are also grateful for the helpful feedback of\r
+# numerous users.\r
+#\r
+# LAST MODIFICATION\r
+#\r
+# 2006-05-29\r
+#\r
+# COPYLEFT\r
+#\r
+# Copyright (c) 2006 Steven G. Johnson <stevenj@alum.mit.edu>\r
+#\r
+# This program is free software; you can redistribute it and/or\r
+# modify it under the terms of the GNU General Public License as\r
+# published by the Free Software Foundation; either version 2 of the\r
+# License, or (at your option) any later version.\r
+#\r
+# This program is distributed in the hope that it will be useful, but\r
+# WITHOUT ANY WARRANTY; without even the implied warranty of\r
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\r
+# General Public License for more details.\r
+#\r
+# You should have received a copy of the GNU General Public License\r
+# along with this program; if not, write to the Free Software\r
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA\r
+# 02111-1307, USA.\r
+#\r
+# As a special exception, the respective Autoconf Macro's copyright\r
+# owner gives unlimited permission to copy, distribute and modify the\r
+# configure scripts that are the output of Autoconf when processing\r
+# the Macro. You need not follow the terms of the GNU General Public\r
+# License when using or distributing such scripts, even though\r
+# portions of the text of the Macro appear in them. The GNU General\r
+# Public License (GPL) does govern all other use of the material that\r
+# constitutes the Autoconf Macro.\r
+#\r
+# This special exception to the GPL applies to versions of the\r
+# Autoconf Macro released by the Autoconf Macro Archive. When you\r
+# make and distribute a modified version of the Autoconf Macro, you\r
+# may extend this special exception to the GPL to apply to your\r
+# modified version as well.\r
+\r
+AC_DEFUN([ACX_PTHREAD], [\r
+AC_REQUIRE([AC_CANONICAL_HOST])\r
+AC_LANG_SAVE\r
+AC_LANG_C\r
+acx_pthread_ok=no\r
+\r
+# We used to check for pthread.h first, but this fails if pthread.h\r
+# requires special compiler flags (e.g. on True64 or Sequent).\r
+# It gets checked for in the link test anyway.\r
+\r
+# First of all, check if the user has set any of the PTHREAD_LIBS,\r
+# etcetera environment variables, and if threads linking works using\r
+# them:\r
+if test x"$PTHREAD_LIBS$PTHREAD_CFLAGS" != x; then\r
+ save_CFLAGS="$CFLAGS"\r
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"\r
+ save_LIBS="$LIBS"\r
+ LIBS="$PTHREAD_LIBS $LIBS"\r
+ AC_MSG_CHECKING([for pthread_join in LIBS=$PTHREAD_LIBS with CFLAGS=$PTHREAD_CFLAGS])\r
+ AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes)\r
+ AC_MSG_RESULT($acx_pthread_ok)\r
+ if test x"$acx_pthread_ok" = xno; then\r
+ PTHREAD_LIBS=""\r
+ PTHREAD_CFLAGS=""\r
+ fi\r
+ LIBS="$save_LIBS"\r
+ CFLAGS="$save_CFLAGS"\r
+fi\r
+\r
+# We must check for the threads library under a number of different\r
+# names; the ordering is very important because some systems\r
+# (e.g. DEC) have both -lpthread and -lpthreads, where one of the\r
+# libraries is broken (non-POSIX).\r
+\r
+# Create a list of thread flags to try. Items starting with a "-" are\r
+# C compiler flags, and other items are library names, except for "none"\r
+# which indicates that we try without any flags at all, and "pthread-config"\r
+# which is a program returning the flags for the Pth emulation library.\r
+\r
+acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"\r
+\r
+# The ordering *is* (sometimes) important. Some notes on the\r
+# individual items follow:\r
+\r
+# pthreads: AIX (must check this before -lpthread)\r
+# none: in case threads are in libc; should be tried before -Kthread and\r
+# other compiler flags to prevent continual compiler warnings\r
+# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h)\r
+# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)\r
+# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)\r
+# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads)\r
+# -pthreads: Solaris/gcc\r
+# -mthreads: Mingw32/gcc, Lynx/gcc\r
+# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it\r
+# doesn't hurt to check since this sometimes defines pthreads too;\r
+# also defines -D_REENTRANT)\r
+# ... -mt is also the pthreads flag for HP/aCC\r
+# pthread: Linux, etcetera\r
+# --thread-safe: KAI C++\r
+# pthread-config: use pthread-config program (for GNU Pth library)\r
+\r
+case "${host_cpu}-${host_os}" in\r
+ *solaris*)\r
+\r
+ # On Solaris (at least, for some versions), libc contains stubbed\r
+ # (non-functional) versions of the pthreads routines, so link-based\r
+ # tests will erroneously succeed. (We need to link with -pthreads/-mt/\r
+ # -lpthread.) (The stubs are missing pthread_cleanup_push, or rather\r
+ # a function called by this macro, so we could check for that, but\r
+ # who knows whether they'll stub that too in a future libc.) So,\r
+ # we'll just look for -pthreads and -lpthread first:\r
+\r
+ acx_pthread_flags="-pthreads pthread -mt -pthread $acx_pthread_flags"\r
+ ;;\r
+esac\r
+\r
+if test x"$acx_pthread_ok" = xno; then\r
+for flag in $acx_pthread_flags; do\r
+\r
+ case $flag in\r
+ none)\r
+ AC_MSG_CHECKING([whether pthreads work without any flags])\r
+ ;;\r
+\r
+ -*)\r
+ AC_MSG_CHECKING([whether pthreads work with $flag])\r
+ PTHREAD_CFLAGS="$flag"\r
+ ;;\r
+\r
+ pthread-config)\r
+ AC_CHECK_PROG(acx_pthread_config, pthread-config, yes, no)\r
+ if test x"$acx_pthread_config" = xno; then continue; fi\r
+ PTHREAD_CFLAGS="`pthread-config --cflags`"\r
+ PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"\r
+ ;;\r
+\r
+ *)\r
+ AC_MSG_CHECKING([for the pthreads library -l$flag])\r
+ PTHREAD_LIBS="-l$flag"\r
+ ;;\r
+ esac\r
+\r
+ save_LIBS="$LIBS"\r
+ save_CFLAGS="$CFLAGS"\r
+ LIBS="$PTHREAD_LIBS $LIBS"\r
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"\r
+\r
+ # Check for various functions. We must include pthread.h,\r
+ # since some functions may be macros. (On the Sequent, we\r
+ # need a special flag -Kthread to make this header compile.)\r
+ # We check for pthread_join because it is in -lpthread on IRIX\r
+ # while pthread_create is in libc. We check for pthread_attr_init\r
+ # due to DEC craziness with -lpthreads. We check for\r
+ # pthread_cleanup_push because it is one of the few pthread\r
+ # functions on Solaris that doesn't have a non-functional libc stub.\r
+ # We try pthread_create on general principles.\r
+ AC_TRY_LINK([#include <pthread.h>],\r
+ [pthread_t th; pthread_join(th, 0);\r
+ pthread_attr_init(0); pthread_cleanup_push(0, 0);\r
+ pthread_create(0,0,0,0); pthread_cleanup_pop(0); ],\r
+ [acx_pthread_ok=yes])\r
+\r
+ LIBS="$save_LIBS"\r
+ CFLAGS="$save_CFLAGS"\r
+\r
+ AC_MSG_RESULT($acx_pthread_ok)\r
+ if test "x$acx_pthread_ok" = xyes; then\r
+ break;\r
+ fi\r
+\r
+ PTHREAD_LIBS=""\r
+ PTHREAD_CFLAGS=""\r
+done\r
+fi\r
+\r
+# Various other checks:\r
+if test "x$acx_pthread_ok" = xyes; then\r
+ save_LIBS="$LIBS"\r
+ LIBS="$PTHREAD_LIBS $LIBS"\r
+ save_CFLAGS="$CFLAGS"\r
+ CFLAGS="$CFLAGS $PTHREAD_CFLAGS"\r
+\r
+ # Detect AIX lossage: JOINABLE attribute is called UNDETACHED.\r
+ AC_MSG_CHECKING([for joinable pthread attribute])\r
+ attr_name=unknown\r
+ for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do\r
+ AC_TRY_LINK([#include <pthread.h>], [int attr=$attr; return attr;],\r
+ [attr_name=$attr; break])\r
+ done\r
+ AC_MSG_RESULT($attr_name)\r
+ if test "$attr_name" != PTHREAD_CREATE_JOINABLE; then\r
+ AC_DEFINE_UNQUOTED(PTHREAD_CREATE_JOINABLE, $attr_name,\r
+ [Define to necessary symbol if this constant\r
+ uses a non-standard name on your system.])\r
+ fi\r
+\r
+ AC_MSG_CHECKING([if more special flags are required for pthreads])\r
+ flag=no\r
+ case "${host_cpu}-${host_os}" in\r
+ *-aix* | *-freebsd*) flag="-D_THREAD_SAFE";;\r
+ *-osf* | *-hpux*) flag="-D_REENTRANT";;\r
+ *solaris*)\r
+ if test "$GCC" = "yes"; then\r
+ flag="-D_REENTRANT"\r
+ else\r
+ flag="-mt -D_REENTRANT"\r
+ fi\r
+ ;;\r
+ esac\r
+ AC_MSG_RESULT(${flag})\r
+ if test "x$flag" != xno; then\r
+ PTHREAD_CFLAGS="$flag $PTHREAD_CFLAGS"\r
+ fi\r
+\r
+ LIBS="$save_LIBS"\r
+ CFLAGS="$save_CFLAGS"\r
+\r
+ # More AIX lossage: must compile with xlc_r or cc_r\r
+ if test x"$GCC" != xyes; then\r
+ AC_CHECK_PROGS(PTHREAD_CC, xlc_r cc_r, ${CC})\r
+ else\r
+ PTHREAD_CC=$CC\r
+ fi\r
+else\r
+ PTHREAD_CC="$CC"\r
+fi\r
+\r
+AC_SUBST(PTHREAD_LIBS)\r
+AC_SUBST(PTHREAD_CFLAGS)\r
+AC_SUBST(PTHREAD_CC)\r
+\r
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:\r
+if test x"$acx_pthread_ok" = xyes; then\r
+ ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1])\r
+ :\r
+else\r
+ acx_pthread_ok=no\r
+ $2\r
+fi\r
+AC_LANG_RESTORE\r
+])dnl ACX_PTHREAD\r
projects / shibboleth / resolver.git / blobdiff