diff options
Diffstat (limited to 'gl/m4/threadlib.m4')
| -rw-r--r-- | gl/m4/threadlib.m4 | 136 |
1 files changed, 80 insertions, 56 deletions
diff --git a/gl/m4/threadlib.m4 b/gl/m4/threadlib.m4 index 05cc4ffa..26bdeb58 100644 --- a/gl/m4/threadlib.m4 +++ b/gl/m4/threadlib.m4 @@ -1,5 +1,5 @@ -# threadlib.m4 serial 5 (gettext-0.18) -dnl Copyright (C) 2005-2010 Free Software Foundation, Inc. +# threadlib.m4 serial 10 (gettext-0.18.2) +dnl Copyright (C) 2005-2013 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -9,8 +9,13 @@ dnl From Bruno Haible. dnl gl_THREADLIB dnl ------------ dnl Tests for a multithreading library to be used. +dnl If the configure.ac contains a definition of the gl_THREADLIB_DEFAULT_NO +dnl (it must be placed before the invocation of gl_THREADLIB_EARLY!), then the +dnl default is 'no', otherwise it is system dependent. In both cases, the user +dnl can change the choice through the options --enable-threads=choice or +dnl --disable-threads. dnl Defines at most one of the macros USE_POSIX_THREADS, USE_SOLARIS_THREADS, -dnl USE_PTH_THREADS, USE_WIN32_THREADS +dnl USE_PTH_THREADS, USE_WINDOWS_THREADS dnl Sets the variables LIBTHREAD and LTLIBTHREAD to the linker options for use dnl in a Makefile (LIBTHREAD for use without libtool, LTLIBTHREAD for use with dnl libtool). @@ -44,10 +49,12 @@ AC_DEFUN([gl_THREADLIB_EARLY_BODY], [AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])], [AC_REQUIRE([AC_GNU_SOURCE])]) dnl Check for multithreading. - m4_divert_text([DEFAULTS], [gl_use_threads_default=]) + m4_ifdef([gl_THREADLIB_DEFAULT_NO], + [m4_divert_text([DEFAULTS], [gl_use_threads_default=no])], + [m4_divert_text([DEFAULTS], [gl_use_threads_default=])]) AC_ARG_ENABLE([threads], -AC_HELP_STRING([--enable-threads={posix|solaris|pth|win32}], [specify multithreading API]) -AC_HELP_STRING([--disable-threads], [build without multithread safety]), +AC_HELP_STRING([--enable-threads={posix|solaris|pth|windows}], [specify multithreading API])m4_ifdef([gl_THREADLIB_DEFAULT_NO], [], [ +AC_HELP_STRING([--disable-threads], [build without multithread safety])]), [gl_use_threads=$enableval], [if test -n "$gl_use_threads_default"; then gl_use_threads="$gl_use_threads_default" @@ -80,7 +87,7 @@ changequote([,])dnl # groks <pthread.h>. cc also understands the flag -pthread, but # we don't use it because 1. gcc-2.95 doesn't understand -pthread, # 2. putting a flag into CPPFLAGS that has an effect on the linker - # causes the AC_TRY_LINK test below to succeed unexpectedly, + # causes the AC_LINK_IFELSE test below to succeed unexpectedly, # leading to wrong values of LIBTHREAD and LTLIBTHREAD. CPPFLAGS="$CPPFLAGS -D_REENTRANT" ;; @@ -111,18 +118,25 @@ AC_DEFUN([gl_THREADLIB_BODY], [gl_cv_have_weak], [gl_cv_have_weak=no dnl First, test whether the compiler accepts it syntactically. - AC_TRY_LINK([extern void xyzzy (); -#pragma weak xyzzy], [xyzzy();], [gl_cv_have_weak=maybe]) + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[extern void xyzzy (); +#pragma weak xyzzy]], + [[xyzzy();]])], + [gl_cv_have_weak=maybe]) if test $gl_cv_have_weak = maybe; then dnl Second, test whether it actually works. On Cygwin 1.7.2, with dnl gcc 4.3, symbols declared weak always evaluate to the address 0. - AC_TRY_RUN([ + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ #include <stdio.h> #pragma weak fputs int main () { return (fputs == NULL); -}], [gl_cv_have_weak=yes], [gl_cv_have_weak=no], +}]])], + [gl_cv_have_weak=yes], + [gl_cv_have_weak=no], [dnl When cross-compiling, assume that only ELF platforms support dnl weak symbols. AC_EGREP_CPP([Extensible Linking Format], @@ -148,9 +162,11 @@ int main () # Test whether both pthread_mutex_lock and pthread_mutexattr_init exist # in libc. IRIX 6.5 has the first one in both libc and libpthread, but # the second one only in libpthread, and lock.c needs it. - AC_TRY_LINK([#include <pthread.h>], - [pthread_mutex_lock((pthread_mutex_t*)0); - pthread_mutexattr_init((pthread_mutexattr_t*)0);], + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include <pthread.h>]], + [[pthread_mutex_lock((pthread_mutex_t*)0); + pthread_mutexattr_init((pthread_mutexattr_t*)0);]])], [gl_have_pthread=yes]) # Test for libpthread by looking for pthread_kill. (Not pthread_self, # since it is defined as a macro on OSF/1.) @@ -203,9 +219,13 @@ int main () gl_have_solaristhread= gl_save_LIBS="$LIBS" LIBS="$LIBS -lthread" - AC_TRY_LINK([#include <thread.h> -#include <synch.h>], - [thr_self();], + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[ +#include <thread.h> +#include <synch.h> + ]], + [[thr_self();]])], [gl_have_solaristhread=yes]) LIBS="$gl_save_LIBS" if test -n "$gl_have_solaristhread"; then @@ -230,8 +250,10 @@ int main () AC_LIB_LINKFLAGS([pth]) gl_have_pth= gl_save_LIBS="$LIBS" - LIBS="$LIBS -lpth" - AC_TRY_LINK([#include <pth.h>], [pth_self();], [gl_have_pth=yes]) + LIBS="$LIBS $LIBPTH" + AC_LINK_IFELSE( + [AC_LANG_PROGRAM([[#include <pth.h>]], [[pth_self();]])], + [gl_have_pth=yes]) LIBS="$gl_save_LIBS" if test -n "$gl_have_pth"; then gl_threads_api=pth @@ -254,17 +276,19 @@ int main () fi fi if test -z "$gl_have_pthread"; then - if test "$gl_use_threads" = yes || test "$gl_use_threads" = win32; then - if { case "$host_os" in - mingw*) true;; - *) false;; - esac - }; then - gl_threads_api=win32 - AC_DEFINE([USE_WIN32_THREADS], [1], - [Define if the Win32 multithreading API can be used.]) - fi - fi + case "$gl_use_threads" in + yes | windows | win32) # The 'win32' is for backward compatibility. + if { case "$host_os" in + mingw*) true;; + *) false;; + esac + }; then + gl_threads_api=windows + AC_DEFINE([USE_WINDOWS_THREADS], [1], + [Define if the native Windows multithreading API can be used.]) + fi + ;; + esac fi fi AC_MSG_CHECKING([for multithread API to use]) @@ -295,50 +319,50 @@ AC_DEFUN([gl_DISABLE_THREADS], [ dnl Survey of platforms: dnl -dnl Platform Available Compiler Supports test-lock -dnl flavours option weak result -dnl --------------- --------- --------- -------- --------- -dnl Linux 2.4/glibc posix -lpthread Y OK +dnl Platform Available Compiler Supports test-lock +dnl flavours option weak result +dnl --------------- --------- --------- -------- --------- +dnl Linux 2.4/glibc posix -lpthread Y OK dnl -dnl GNU Hurd/glibc posix +dnl GNU Hurd/glibc posix dnl -dnl FreeBSD 5.3 posix -lc_r Y -dnl posix -lkse ? Y -dnl posix -lpthread ? Y -dnl posix -lthr Y +dnl FreeBSD 5.3 posix -lc_r Y +dnl posix -lkse ? Y +dnl posix -lpthread ? Y +dnl posix -lthr Y dnl -dnl FreeBSD 5.2 posix -lc_r Y -dnl posix -lkse Y -dnl posix -lthr Y +dnl FreeBSD 5.2 posix -lc_r Y +dnl posix -lkse Y +dnl posix -lthr Y dnl -dnl FreeBSD 4.0,4.10 posix -lc_r Y OK +dnl FreeBSD 4.0,4.10 posix -lc_r Y OK dnl -dnl NetBSD 1.6 -- +dnl NetBSD 1.6 -- dnl -dnl OpenBSD 3.4 posix -lpthread Y OK +dnl OpenBSD 3.4 posix -lpthread Y OK dnl -dnl MacOS X 10.[123] posix -lpthread Y OK +dnl Mac OS X 10.[123] posix -lpthread Y OK dnl -dnl Solaris 7,8,9 posix -lpthread Y Sol 7,8: 0.0; Sol 9: OK -dnl solaris -lthread Y Sol 7,8: 0.0; Sol 9: OK +dnl Solaris 7,8,9 posix -lpthread Y Sol 7,8: 0.0; Sol 9: OK +dnl solaris -lthread Y Sol 7,8: 0.0; Sol 9: OK dnl -dnl HP-UX 11 posix -lpthread N (cc) OK +dnl HP-UX 11 posix -lpthread N (cc) OK dnl Y (gcc) dnl -dnl IRIX 6.5 posix -lpthread Y 0.5 +dnl IRIX 6.5 posix -lpthread Y 0.5 dnl -dnl AIX 4.3,5.1 posix -lpthread N AIX 4: 0.5; AIX 5: OK +dnl AIX 4.3,5.1 posix -lpthread N AIX 4: 0.5; AIX 5: OK dnl -dnl OSF/1 4.0,5.1 posix -pthread (cc) N OK +dnl OSF/1 4.0,5.1 posix -pthread (cc) N OK dnl -lpthread (gcc) Y dnl -dnl Cygwin posix -lpthread Y OK +dnl Cygwin posix -lpthread Y OK dnl -dnl Any of the above pth -lpth 0.0 +dnl Any of the above pth -lpth 0.0 dnl -dnl Mingw win32 N OK +dnl Mingw windows N OK dnl -dnl BeOS 5 -- +dnl BeOS 5 -- dnl dnl The test-lock result shows what happens if in test-lock.c EXPLICIT_YIELD is dnl turned off: |