libpst: m4/ax_pthread.m4 comparison

comparison m4/ax_pthread.m4 @ 380:1e1970f93f94 stable-0-6-72

allow all 7 days in bydays recurring appointment, update for fedora python packaging

author	Carl Byington <carl@five-ten-sg.com>
date	Wed, 01 Aug 2018 08:15:34 -0700
parents
children

comparison

equal deleted inserted replaced

-:bbd198da4033
+:1e1970f93f94
+# ===========================================================================
+#        https://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 to link with them as well. For example, you might link with
+#   $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS $LIBS
+#
+#   If you are only building threaded programs, you may wish to use these
+#   variables in your default LIBS, CFLAGS, and CC:
+#
+#     LIBS="$PTHREAD_LIBS $LIBS"
+#     CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+#     CC="$PTHREAD_CC"
+#
+#   In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute constant
+#   has a nonstandard name, this macro defines PTHREAD_CREATE_JOINABLE to
+#   that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX).
+#
+#   Also HAVE_PTHREAD_PRIO_INHERIT is defined if pthread is found and the
+#   PTHREAD_PRIO_INHERIT symbol is defined when compiling with
+#   PTHREAD_CFLAGS.
+#
+#   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.
+#
+#   Updated for Autoconf 2.68 by Daniel Richard G.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+#   Copyright (c) 2011 Daniel Richard G. <skunk@iSKUNK.ORG>
+#
+#   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 <https://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 24
+AU_ALIAS([ACX_PTHREAD], [AX_PTHREAD])
+AC_DEFUN([AX_PTHREAD], [
+AC_REQUIRE([AC_CANONICAL_HOST])
+AC_REQUIRE([AC_PROG_CC])
+AC_REQUIRE([AC_PROG_SED])
+AC_LANG_PUSH([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 Tru64 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$PTHREAD_CFLAGS$PTHREAD_LIBS" != "x"; then
+ax_pthread_save_CC="$CC"
+ax_pthread_save_CFLAGS="$CFLAGS"
+ax_pthread_save_LIBS="$LIBS"
+AS_IF([test "x$PTHREAD_CC" != "x"], [CC="$PTHREAD_CC"])
+CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+LIBS="$PTHREAD_LIBS $LIBS"
+AC_MSG_CHECKING([for pthread_join using $CC $PTHREAD_CFLAGS $PTHREAD_LIBS])
+AC_LINK_IFELSE([AC_LANG_CALL([], [pthread_join])], [ax_pthread_ok=yes])
+AC_MSG_RESULT([$ax_pthread_ok])
+if test "x$ax_pthread_ok" = "xno"; then
+PTHREAD_LIBS=""
+PTHREAD_CFLAGS=""
+fi
+CC="$ax_pthread_save_CC"
+CFLAGS="$ax_pthread_save_CFLAGS"
+LIBS="$ax_pthread_save_LIBS"
+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 -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)
+# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads), Tru64
+#           (Note: HP C rejects this with "bad form for `-t' option")
+# -pthreads: Solaris/gcc (Note: HP C also rejects)
+# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it
+#      doesn't hurt to check since this sometimes defines pthreads and
+#      -D_REENTRANT too), HP C (must be checked before -lpthread, which
+#      is present but should not be used directly; and before -mthreads,
+#      because the compiler interprets this as "-mt" + "-hreads")
+# -mthreads: Mingw32/gcc, Lynx/gcc
+# pthread: Linux, etcetera
+# --thread-safe: KAI C++
+# pthread-config: use pthread-config program (for GNU Pth library)
+case $host_os in
+freebsd*)
+# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able)
+# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread)
+ax_pthread_flags="-kthread lthread $ax_pthread_flags"
+;;
+hpux*)
+# From the cc(1) man page: "[-mt] Sets various -D flags to enable
+# multi-threading and also sets -lpthread."
+ax_pthread_flags="-mt -pthread pthread $ax_pthread_flags"
+;;
+openedition*)
+# IBM z/OS requires a feature-test macro to be defined in order to
+# enable POSIX threads at all, so give the user a hint if this is
+# not set. (We don't define these ourselves, as they can affect
+# other portions of the system API in unpredictable ways.)
+AC_EGREP_CPP([AX_PTHREAD_ZOS_MISSING],
+[
+#            if !defined(_OPEN_THREADS) && !defined(_UNIX03_THREADS)
+AX_PTHREAD_ZOS_MISSING
+#            endif
+],
+[AC_MSG_WARN([IBM z/OS requires -D_OPEN_THREADS or -D_UNIX03_THREADS to enable pthreads support.])])
+;;
+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. (N.B.: 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 check first for the
+# standard Solaris way of linking pthreads (-mt -lpthread).
+ax_pthread_flags="-mt,pthread pthread $ax_pthread_flags"
+;;
+esac
+# GCC generally uses -pthread, or -pthreads on some platforms (e.g. SPARC)
+AS_IF([test "x$GCC" = "xyes"],
+[ax_pthread_flags="-pthread -pthreads $ax_pthread_flags"])
+# The presence of a feature test macro requesting re-entrant function
+# definitions is, on some systems, a strong hint that pthreads support is
+# correctly enabled
+case $host_os in
+darwin* | hpux* | linux* | osf* | solaris*)
+ax_pthread_check_macro="_REENTRANT"
+;;
+aix*)
+ax_pthread_check_macro="_THREAD_SAFE"
+;;
+*)
+ax_pthread_check_macro="--"
+;;
+esac
+AS_IF([test "x$ax_pthread_check_macro" = "x--"],
+[ax_pthread_check_cond=0],
+[ax_pthread_check_cond="!defined($ax_pthread_check_macro)"])
+# Are we compiling with Clang?
+AC_CACHE_CHECK([whether $CC is Clang],
+[ax_cv_PTHREAD_CLANG],
+[ax_cv_PTHREAD_CLANG=no
+# Note that Autoconf sets GCC=yes for Clang as well as GCC
+if test "x$GCC" = "xyes"; then
+AC_EGREP_CPP([AX_PTHREAD_CC_IS_CLANG],
+[/* Note: Clang 2.7 lacks __clang_[a-z]+__ */
+#            if defined(__clang__) && defined(__llvm__)
+AX_PTHREAD_CC_IS_CLANG
+#            endif
+],
+[ax_cv_PTHREAD_CLANG=yes])
+fi
+])
+ax_pthread_clang="$ax_cv_PTHREAD_CLANG"
+ax_pthread_clang_warning=no
+# Clang needs special handling, because older versions handle the -pthread
+# option in a rather... idiosyncratic way
+if test "x$ax_pthread_clang" = "xyes"; then
+# Clang takes -pthread; it has never supported any other flag
+# (Note 1: This will need to be revisited if a system that Clang
+# supports has POSIX threads in a separate library.  This tends not
+# to be the way of modern systems, but it's conceivable.)
+# (Note 2: On some systems, notably Darwin, -pthread is not needed
+# to get POSIX threads support; the API is always present and
+# active.  We could reasonably leave PTHREAD_CFLAGS empty.  But
+# -pthread does define _REENTRANT, and while the Darwin headers
+# ignore this macro, third-party headers might not.)
+PTHREAD_CFLAGS="-pthread"
+PTHREAD_LIBS=
+ax_pthread_ok=yes
+# However, older versions of Clang make a point of warning the user
+# that, in an invocation where only linking and no compilation is
+# taking place, the -pthread option has no effect ("argument unused
+# during compilation").  They expect -pthread to be passed in only
+# when source code is being compiled.
+#
+# Problem is, this is at odds with the way Automake and most other
+# C build frameworks function, which is that the same flags used in
+# compilation (CFLAGS) are also used in linking.  Many systems
+# supported by AX_PTHREAD require exactly this for POSIX threads
+# support, and in fact it is often not straightforward to specify a
+# flag that is used only in the compilation phase and not in
+# linking.  Such a scenario is extremely rare in practice.
+#
+# Even though use of the -pthread flag in linking would only print
+# a warning, this can be a nuisance for well-run software projects
+# that build with -Werror.  So if the active version of Clang has
+# this misfeature, we search for an option to squash it.
+AC_CACHE_CHECK([whether Clang needs flag to prevent "argument unused" warning when linking with -pthread],
+[ax_cv_PTHREAD_CLANG_NO_WARN_FLAG],
+[ax_cv_PTHREAD_CLANG_NO_WARN_FLAG=unknown
+# Create an alternate version of $ac_link that compiles and
+# links in two steps (.c -> .o, .o -> exe) instead of one
+# (.c -> exe), because the warning occurs only in the second
+# step
+ax_pthread_save_ac_link="$ac_link"
+ax_pthread_sed='s/conftest\.\$ac_ext/conftest.$ac_objext/g'
+ax_pthread_link_step=`$as_echo "$ac_link" | sed "$ax_pthread_sed"`
+ax_pthread_2step_ac_link="($ac_compile) && (echo ==== >&5) && ($ax_pthread_link_step)"
+ax_pthread_save_CFLAGS="$CFLAGS"
+for ax_pthread_try in '' -Qunused-arguments -Wno-unused-command-line-argument unknown; do
+AS_IF([test "x$ax_pthread_try" = "xunknown"], [break])
+CFLAGS="-Werror -Wunknown-warning-option $ax_pthread_try -pthread $ax_pthread_save_CFLAGS"
+ac_link="$ax_pthread_save_ac_link"
+AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
+[ac_link="$ax_pthread_2step_ac_link"
+AC_LINK_IFELSE([AC_LANG_SOURCE([[int main(void){return 0;}]])],
+[break])
+])
+done
+ac_link="$ax_pthread_save_ac_link"
+CFLAGS="$ax_pthread_save_CFLAGS"
+AS_IF([test "x$ax_pthread_try" = "x"], [ax_pthread_try=no])
+ax_cv_PTHREAD_CLANG_NO_WARN_FLAG="$ax_pthread_try"
+])
+case "$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG" in
+no | unknown) ;;
+*) PTHREAD_CFLAGS="$ax_cv_PTHREAD_CLANG_NO_WARN_FLAG $PTHREAD_CFLAGS" ;;
+esac
+fi # $ax_pthread_clang = yes
+if test "x$ax_pthread_ok" = "xno"; then
+for ax_pthread_try_flag in $ax_pthread_flags; do
+case $ax_pthread_try_flag in
+none)
+AC_MSG_CHECKING([whether pthreads work without any flags])
+;;
+-mt,pthread)
+AC_MSG_CHECKING([whether pthreads work with -mt -lpthread])
+PTHREAD_CFLAGS="-mt"
+PTHREAD_LIBS="-lpthread"
+;;
+-*)
+AC_MSG_CHECKING([whether pthreads work with $ax_pthread_try_flag])
+PTHREAD_CFLAGS="$ax_pthread_try_flag"
+;;
+pthread-config)
+AC_CHECK_PROG([ax_pthread_config], [pthread-config], [yes], [no])
+AS_IF([test "x$ax_pthread_config" = "xno"], [continue])
+PTHREAD_CFLAGS="`pthread-config --cflags`"
+PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`"
+;;
+*)
+AC_MSG_CHECKING([for the pthreads library -l$ax_pthread_try_flag])
+PTHREAD_LIBS="-l$ax_pthread_try_flag"
+;;
+esac
+ax_pthread_save_CFLAGS="$CFLAGS"
+ax_pthread_save_LIBS="$LIBS"
+CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+LIBS="$PTHREAD_LIBS $LIBS"
+# 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_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>
+#                       if $ax_pthread_check_cond
+#                        error "$ax_pthread_check_macro must be defined"
+#                       endif
+static void routine(void *a) { a = 0; }
+static void *start_routine(void *a) { return a; }],
+[pthread_t th; pthread_attr_t attr;
+pthread_create(&th, 0, start_routine, 0);
+pthread_join(th, 0);
+pthread_attr_init(&attr);
+pthread_cleanup_push(routine, 0);
+pthread_cleanup_pop(0) /* ; */])],
+[ax_pthread_ok=yes],
+[])
+CFLAGS="$ax_pthread_save_CFLAGS"
+LIBS="$ax_pthread_save_LIBS"
+AC_MSG_RESULT([$ax_pthread_ok])
+AS_IF([test "x$ax_pthread_ok" = "xyes"], [break])
+PTHREAD_LIBS=""
+PTHREAD_CFLAGS=""
+done
+fi
+# Various other checks:
+if test "x$ax_pthread_ok" = "xyes"; then
+ax_pthread_save_CFLAGS="$CFLAGS"
+ax_pthread_save_LIBS="$LIBS"
+CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+LIBS="$PTHREAD_LIBS $LIBS"
+# Detect AIX lossage: JOINABLE attribute is called UNDETACHED.
+AC_CACHE_CHECK([for joinable pthread attribute],
+[ax_cv_PTHREAD_JOINABLE_ATTR],
+[ax_cv_PTHREAD_JOINABLE_ATTR=unknown
+for ax_pthread_attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do
+AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <pthread.h>],
+[int attr = $ax_pthread_attr; return attr /* ; */])],
+[ax_cv_PTHREAD_JOINABLE_ATTR=$ax_pthread_attr; break],
+[])
+done
+])
+AS_IF([test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xunknown" && \
+test "x$ax_cv_PTHREAD_JOINABLE_ATTR" != "xPTHREAD_CREATE_JOINABLE" && \
+test "x$ax_pthread_joinable_attr_defined" != "xyes"],
+[AC_DEFINE_UNQUOTED([PTHREAD_CREATE_JOINABLE],
+[$ax_cv_PTHREAD_JOINABLE_ATTR],
+[Define to necessary symbol if this constant
+uses a non-standard name on your system.])
+ax_pthread_joinable_attr_defined=yes
+])
+AC_CACHE_CHECK([whether more special flags are required for pthreads],
+[ax_cv_PTHREAD_SPECIAL_FLAGS],
+[ax_cv_PTHREAD_SPECIAL_FLAGS=no
+case $host_os in
+solaris*)
+ax_cv_PTHREAD_SPECIAL_FLAGS="-D_POSIX_PTHREAD_SEMANTICS"
+;;
+esac
+])
+AS_IF([test "x$ax_cv_PTHREAD_SPECIAL_FLAGS" != "xno" && \
+test "x$ax_pthread_special_flags_added" != "xyes"],
+[PTHREAD_CFLAGS="$ax_cv_PTHREAD_SPECIAL_FLAGS $PTHREAD_CFLAGS"
+ax_pthread_special_flags_added=yes])
+AC_CACHE_CHECK([for PTHREAD_PRIO_INHERIT],
+[ax_cv_PTHREAD_PRIO_INHERIT],
+[AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <pthread.h>]],
+[[int i = PTHREAD_PRIO_INHERIT;]])],
+[ax_cv_PTHREAD_PRIO_INHERIT=yes],
+[ax_cv_PTHREAD_PRIO_INHERIT=no])
+])
+AS_IF([test "x$ax_cv_PTHREAD_PRIO_INHERIT" = "xyes" && \
+test "x$ax_pthread_prio_inherit_defined" != "xyes"],
+[AC_DEFINE([HAVE_PTHREAD_PRIO_INHERIT], [1], [Have PTHREAD_PRIO_INHERIT.])
+ax_pthread_prio_inherit_defined=yes
+])
+CFLAGS="$ax_pthread_save_CFLAGS"
+LIBS="$ax_pthread_save_LIBS"
+# More AIX lossage: compile with *_r variant
+if test "x$GCC" != "xyes"; then
+case $host_os in
+aix*)
+AS_CASE(["x/$CC"],
+[x*/c89|x*/c89_128|x*/c99|x*/c99_128|x*/cc|x*/cc128|x*/xlc|x*/xlc_v6|x*/xlc128|x*/xlc128_v6],
+[#handle absolute path differently from PATH based program lookup
+AS_CASE(["x$CC"],
+[x/*],
+[AS_IF([AS_EXECUTABLE_P([${CC}_r])],[PTHREAD_CC="${CC}_r"])],
+[AC_CHECK_PROGS([PTHREAD_CC],[${CC}_r],[$CC])])])
+;;
+esac
+fi
+fi
+test -n "$PTHREAD_CC" || PTHREAD_CC="$CC"
+AC_SUBST([PTHREAD_LIBS])
+AC_SUBST([PTHREAD_CFLAGS])
+AC_SUBST([PTHREAD_CC])
+# Finally, execute ACTION-IF-FOUND/ACTION-IF-NOT-FOUND:
+if test "x$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_POP
+])dnl AX_PTHREAD

Mercurial > libpst

comparison m4/ax_pthread.m4 @ 380:1e1970f93f94 stable-0-6-72