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Diffstat (limited to 'src/3rdparty/libtiff/m4/acinclude.m4')
| -rw-r--r-- | src/3rdparty/libtiff/m4/acinclude.m4 | 669 |
1 files changed, 669 insertions, 0 deletions
diff --git a/src/3rdparty/libtiff/m4/acinclude.m4 b/src/3rdparty/libtiff/m4/acinclude.m4 new file mode 100644 index 0000000..a213cde --- /dev/null +++ b/src/3rdparty/libtiff/m4/acinclude.m4 @@ -0,0 +1,669 @@ +dnl --------------------------------------------------------------------------- +dnl Message output +dnl --------------------------------------------------------------------------- +AC_DEFUN([LOC_MSG],[echo "$1"]) + +dnl --------------------------------------------------------------------------- +dnl Available from the GNU Autoconf Macro Archive at: +dnl http://www.gnu.org/software/ac-archive/vl_prog_cc_warnings.html +dnl --------------------------------------------------------------------------- + +dnl @synopsis VL_PROG_CC_WARNINGS([ANSI]) +dnl +dnl Enables a reasonable set of warnings for the C compiler. +dnl Optionally, if the first argument is nonempty, turns on flags which +dnl enforce and/or enable proper ANSI C if such are known with the +dnl compiler used. +dnl +dnl Currently this macro knows about GCC, Solaris C compiler, Digital +dnl Unix C compiler, C for AIX Compiler, HP-UX C compiler, IRIX C +dnl compiler, NEC SX-5 (Super-UX 10) C compiler, and Cray J90 (Unicos +dnl 10.0.0.8) C compiler. +dnl +dnl @category C +dnl @author Ville Laurikari <vl@iki.fi> +dnl @version 2002-04-04 +dnl @license AllPermissive + +AC_DEFUN([VL_PROG_CC_WARNINGS], [ + ansi=$1 + if test -z "$ansi"; then + msg="for C compiler warning flags" + else + msg="for C compiler warning and ANSI conformance flags" + fi + AC_CACHE_CHECK($msg, vl_cv_prog_cc_warnings, [ + if test -n "$CC"; then + cat > conftest.c <<EOF +int main(int argc, char **argv) { return 0; } +EOF + + dnl GCC. -W option has been renamed in -wextra in latest gcc versions. + if test "$GCC" = "yes"; then + if test -z "$ansi"; then + vl_cv_prog_cc_warnings="-Wall -W" + else + vl_cv_prog_cc_warnings="-Wall -W -ansi -pedantic" + fi + + dnl Most compilers print some kind of a version string with some command + dnl line options (often "-V"). The version string should be checked + dnl before doing a test compilation run with compiler-specific flags. + dnl This is because some compilers (like the Cray compiler) only + dnl produce a warning message for unknown flags instead of returning + dnl an error, resulting in a false positive. Also, compilers may do + dnl erratic things when invoked with flags meant for a different + dnl compiler. + + dnl Solaris C compiler + elif $CC -V 2>&1 | grep -i "WorkShop" > /dev/null 2>&1 && + $CC -c -v -Xc conftest.c > /dev/null 2>&1 && + test -f conftest.o; then + if test -z "$ansi"; then + vl_cv_prog_cc_warnings="-v" + else + vl_cv_prog_cc_warnings="-v -Xc" + fi + + dnl Digital Unix C compiler + elif $CC -V 2>&1 | grep -i "Digital UNIX Compiler" > /dev/null 2>&1 && + $CC -c -verbose -w0 -warnprotos -std1 conftest.c > /dev/null 2>&1 && + test -f conftest.o; then + if test -z "$ansi"; then + vl_cv_prog_cc_warnings="-verbose -w0 -warnprotos" + else + vl_cv_prog_cc_warnings="-verbose -w0 -warnprotos -std1" + fi + + dnl C for AIX Compiler + elif $CC 2>&1 | grep -i "C for AIX Compiler" > /dev/null 2>&1 && + $CC -c -qlanglvl=ansi -qinfo=all conftest.c > /dev/null 2>&1 && + test -f conftest.o; then + if test -z "$ansi"; then + vl_cv_prog_cc_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd" + else + vl_cv_prog_cc_warnings="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd -qlanglvl=ansi" + fi + + dnl IRIX C compiler + elif $CC -version 2>&1 | grep -i "MIPSpro Compilers" > /dev/null 2>&1 && + $CC -c -fullwarn -ansi -ansiE conftest.c > /dev/null 2>&1 && + test -f conftest.o; then + if test -z "$ansi"; then + vl_cv_prog_cc_warnings="-fullwarn" + else + vl_cv_prog_cc_warnings="-fullwarn -ansi -ansiE" + fi + + dnl HP-UX C compiler + elif what $CC 2>&1 | grep -i "HP C Compiler" > /dev/null 2>&1 && + $CC -c -Aa +w1 conftest.c > /dev/null 2>&1 && + test -f conftest.o; then + if test -z "$ansi"; then + vl_cv_prog_cc_warnings="+w1" + else + vl_cv_prog_cc_warnings="+w1 -Aa" + fi + + dnl The NEC SX-5 (Super-UX 10) C compiler + elif $CC -V 2>&1 | grep "/SX" > /dev/null 2>&1 && + $CC -c -pvctl[,]fullmsg -Xc conftest.c > /dev/null 2>&1 && + test -f conftest.o; then + if test -z "$ansi"; then + vl_cv_prog_cc_warnings="-pvctl[,]fullmsg" + else + vl_cv_prog_cc_warnings="-pvctl[,]fullmsg -Xc" + fi + + dnl The Cray C compiler (Unicos) + elif $CC -V 2>&1 | grep -i "Cray" > /dev/null 2>&1 && + $CC -c -h msglevel 2 conftest.c > /dev/null 2>&1 && + test -f conftest.o; then + if test -z "$ansi"; then + vl_cv_prog_cc_warnings="-h msglevel 2" + else + vl_cv_prog_cc_warnings="-h msglevel 2 -h conform" + fi + + fi + rm -f conftest.* + fi + if test -n "$vl_cv_prog_cc_warnings"; then + CFLAGS="$CFLAGS $vl_cv_prog_cc_warnings" + else + vl_cv_prog_cc_warnings="unknown" + fi + ]) +])dnl + +dnl --------------------------------------------------------------------------- +dnl Available from the GNU Autoconf Macro Archive at: +dnl http://autoconf-archive.cryp.to/ax_lang_compiler_ms.html +dnl --------------------------------------------------------------------------- + +dnl @synopsis AX_LANG_COMPILER_MS +dnl +dnl Check whether the compiler for the current language is Microsoft. +dnl +dnl This macro is modeled after _AC_LANG_COMPILER_GNU in the GNU +dnl Autoconf implementation. +dnl +dnl @category InstalledPackages +dnl @author Braden McDaniel <braden@endoframe.com> +dnl @version 2004-11-15 +dnl @license AllPermissive + +AC_DEFUN([AX_LANG_COMPILER_MS], +[AC_CACHE_CHECK([whether we are using the Microsoft _AC_LANG compiler], + [ax_cv_[]_AC_LANG_ABBREV[]_compiler_ms], +[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[#ifndef _MSC_VER + choke me +#endif +]])], + [ax_compiler_ms=yes], + [ax_compiler_ms=no]) +ax_cv_[]_AC_LANG_ABBREV[]_compiler_ms=$ax_compiler_ms +])]) + +dnl --------------------------------------------------------------------------- +dnl Available from the GNU Autoconf Macro Archive at: +dnl http://www.gnu.org/software/ac-archive/ax_check_gl.html +dnl --------------------------------------------------------------------------- + +dnl @synopsis AX_CHECK_GL +dnl +dnl Check for an OpenGL implementation. If GL is found, the required +dnl compiler and linker flags are included in the output variables +dnl "GL_CFLAGS" and "GL_LIBS", respectively. This macro adds the +dnl configure option "--with-apple-opengl-framework", which users can +dnl use to indicate that Apple's OpenGL framework should be used on Mac +dnl OS X. If Apple's OpenGL framework is used, the symbol +dnl "HAVE_APPLE_OPENGL_FRAMEWORK" is defined. If no GL implementation +dnl is found, "no_gl" is set to "yes". +dnl +dnl @category InstalledPackages +dnl @author Braden McDaniel <braden@endoframe.com> +dnl @version 2004-11-15 +dnl @license AllPermissive + +AC_DEFUN([AX_CHECK_GL], +[AC_REQUIRE([AC_PATH_X])dnl +AC_REQUIRE([ACX_PTHREAD])dnl + +# +# There isn't a reliable way to know we should use the Apple OpenGL framework +# without a configure option. A Mac OS X user may have installed an +# alternative GL implementation (e.g., Mesa), which may or may not depend on X. +# +AC_ARG_WITH([apple-opengl-framework], + [AC_HELP_STRING([--with-apple-opengl-framework], + [use Apple OpenGL framework (Mac OS X only)])]) +if test "X$with_apple_opengl_framework" = "Xyes"; then + AC_DEFINE([HAVE_APPLE_OPENGL_FRAMEWORK], [1], + [Use the Apple OpenGL framework.]) + GL_LIBS="-framework OpenGL" +else + AC_LANG_PUSH(C) + + AX_LANG_COMPILER_MS + if test X$ax_compiler_ms = Xno; then + GL_CFLAGS="${PTHREAD_CFLAGS}" + GL_LIBS="${PTHREAD_LIBS} -lm" + fi + + # + # Use x_includes and x_libraries if they have been set (presumably by + # AC_PATH_X). + # + if test "X$no_x" != "Xyes"; then + if test -n "$x_includes"; then + GL_CFLAGS="-I${x_includes} ${GL_CFLAGS}" + fi + if test -n "$x_libraries"; then + GL_LIBS="-L${x_libraries} -lX11 ${GL_LIBS}" + fi + fi + + AC_CHECK_HEADERS([windows.h]) + + AC_CACHE_CHECK([for OpenGL library], [ax_cv_check_gl_libgl], + [ax_cv_check_gl_libgl="no" + ax_save_CPPFLAGS="${CPPFLAGS}" + CPPFLAGS="${GL_CFLAGS} ${CPPFLAGS}" + ax_save_LIBS="${LIBS}" + LIBS="" + ax_check_libs="-lopengl32 -lGL" + for ax_lib in ${ax_check_libs}; do + if test X$ax_compiler_ms = Xyes; then + ax_try_lib=`echo $ax_lib | sed -e 's/^-l//' -e 's/$/.lib/'` + else + ax_try_lib="${ax_lib}" + fi + LIBS="${ax_try_lib} ${GL_LIBS} ${ax_save_LIBS}" + AC_LINK_IFELSE( + [AC_LANG_PROGRAM([[ +# if HAVE_WINDOWS_H && defined(_WIN32) +# include <windows.h> +# endif +# include <GL/gl.h>]], + [[glBegin(0)]])], + [ax_cv_check_gl_libgl="${ax_try_lib}"; break]) + done + LIBS=${ax_save_LIBS} + CPPFLAGS=${ax_save_CPPFLAGS}]) + + if test "X${ax_cv_check_gl_libgl}" = "Xno"; then + no_gl="yes" + GL_CFLAGS="" + GL_LIBS="" + else + GL_LIBS="${ax_cv_check_gl_libgl} ${GL_LIBS}" + fi + AC_LANG_POP(C) +fi + +AC_SUBST([GL_CFLAGS]) +AC_SUBST([GL_LIBS]) +])dnl + +dnl --------------------------------------------------------------------------- +dnl Available from the GNU Autoconf Macro Archive at: +dnl http://www.gnu.org/software/ac-archive/ax_check_glu.html +dnl --------------------------------------------------------------------------- + +dnl @synopsis AX_CHECK_GLU +dnl +dnl Check for GLU. If GLU is found, the required preprocessor and +dnl linker flags are included in the output variables "GLU_CFLAGS" and +dnl "GLU_LIBS", respectively. This macro adds the configure option +dnl "--with-apple-opengl-framework", which users can use to indicate +dnl that Apple's OpenGL framework should be used on Mac OS X. If +dnl Apple's OpenGL framework is used, the symbol +dnl "HAVE_APPLE_OPENGL_FRAMEWORK" is defined. If no GLU implementation +dnl is found, "no_glu" is set to "yes". +dnl +dnl @category InstalledPackages +dnl @author Braden McDaniel <braden@endoframe.com> +dnl @version 2004-11-15 +dnl @license AllPermissive + +AC_DEFUN([AX_CHECK_GLU], +[AC_REQUIRE([AX_CHECK_GL])dnl +AC_REQUIRE([AC_PROG_CXX])dnl +GLU_CFLAGS="${GL_CFLAGS}" +if test "X${with_apple_opengl_framework}" != "Xyes"; then + AC_CACHE_CHECK([for OpenGL Utility library], [ax_cv_check_glu_libglu], + [ax_cv_check_glu_libglu="no" + ax_save_CPPFLAGS="${CPPFLAGS}" + CPPFLAGS="${GL_CFLAGS} ${CPPFLAGS}" + ax_save_LIBS="${LIBS}" + LIBS="" + ax_check_libs="-lglu32 -lGLU" + for ax_lib in ${ax_check_libs}; do + if test X$ax_compiler_ms = Xyes; then + ax_try_lib=`echo $ax_lib | sed -e 's/^-l//' -e 's/$/.lib/'` + else + ax_try_lib="${ax_lib}" + fi + LIBS="${ax_try_lib} ${GL_LIBS} ${ax_save_LIBS}" + # + # libGLU typically links with libstdc++ on POSIX platforms. However, + # setting the language to C++ means that test program source is named + # "conftest.cc"; and Microsoft cl doesn't know what to do with such a + # file. + # + AC_LANG_PUSH([C++]) + if test X$ax_compiler_ms = Xyes; then + AC_LANG_PUSH([C]) + fi + AC_LINK_IFELSE( + [AC_LANG_PROGRAM([[ +# if HAVE_WINDOWS_H && defined(_WIN32) +# include <windows.h> +# endif +# include <GL/glu.h>]], + [[gluBeginCurve(0)]])], + [ax_cv_check_glu_libglu="${ax_try_lib}"; break]) + if test X$ax_compiler_ms = Xyes; then + AC_LANG_POP([C]) + fi + AC_LANG_POP([C++]) + done + LIBS=${ax_save_LIBS} + CPPFLAGS=${ax_save_CPPFLAGS}]) + if test "X${ax_cv_check_glu_libglu}" = "Xno"; then + no_glu="yes" + GLU_CFLAGS="" + GLU_LIBS="" + else + GLU_LIBS="${ax_cv_check_glu_libglu} ${GL_LIBS}" + fi +fi +AC_SUBST([GLU_CFLAGS]) +AC_SUBST([GLU_LIBS]) +]) + +dnl --------------------------------------------------------------------------- +dnl Available from the GNU Autoconf Macro Archive at: +dnl http://www.gnu.org/software/ac-archive/ax_check_glut.html +dnl --------------------------------------------------------------------------- + +dnl @synopsis AX_CHECK_GLUT +dnl +dnl Check for GLUT. If GLUT is found, the required compiler and linker +dnl flags are included in the output variables "GLUT_CFLAGS" and +dnl "GLUT_LIBS", respectively. This macro adds the configure option +dnl "--with-apple-opengl-framework", which users can use to indicate +dnl that Apple's OpenGL framework should be used on Mac OS X. If +dnl Apple's OpenGL framework is used, the symbol +dnl "HAVE_APPLE_OPENGL_FRAMEWORK" is defined. If GLUT is not found, +dnl "no_glut" is set to "yes". +dnl +dnl @category InstalledPackages +dnl @author Braden McDaniel <braden@endoframe.com> +dnl @version 2004-11-15 +dnl @license AllPermissive + +AC_DEFUN([AX_CHECK_GLUT], +[AC_REQUIRE([AX_CHECK_GLU])dnl +AC_REQUIRE([AC_PATH_XTRA])dnl + +if test "X$with_apple_opengl_framework" = "Xyes"; then + GLUT_CFLAGS="${GLU_CFLAGS}" + GLUT_LIBS="-framework GLUT -lobjc ${GL_LIBS}" +else + GLUT_CFLAGS=${GLU_CFLAGS} + GLUT_LIBS=${GLU_LIBS} + + # + # If X is present, assume GLUT depends on it. + # + if test "X${no_x}" != "Xyes"; then + GLUT_LIBS="${X_PRE_LIBS} -lXmu -lXi ${X_EXTRA_LIBS} ${GLUT_LIBS}" + fi + + AC_LANG_PUSH(C) + + ax_save_CPPFLAGS="${CPPFLAGS}" + CPPFLAGS="${GLUT_CFLAGS} ${CPPFLAGS}" + + AC_CACHE_CHECK([for GLUT library], [ax_cv_check_glut_libglut], + [ax_cv_check_glut_libglut="no" + ax_save_LIBS="${LIBS}" + LIBS="" + ax_check_libs="-lglut32 -lglut" + for ax_lib in ${ax_check_libs}; do + if test X$ax_compiler_ms = Xyes; then + ax_try_lib=`echo $ax_lib | sed -e 's/^-l//' -e 's/$/.lib/'` + else + ax_try_lib="${ax_lib}" + fi + LIBS="${ax_try_lib} ${GLUT_LIBS} ${ax_save_LIBS}" + AC_LINK_IFELSE( + [AC_LANG_PROGRAM([[ +# if HAVE_WINDOWS_H && defined(_WIN32) +# include <windows.h> +# endif +# include <GL/glut.h>]], + [[glutMainLoop()]])], + [ax_cv_check_glut_libglut="${ax_try_lib}"; break]) + + done + LIBS=${ax_save_LIBS} + ]) + CPPFLAGS="${ax_save_CPPFLAGS}" + AC_LANG_POP(C) + + if test "X${ax_cv_check_glut_libglut}" = "Xno"; then + no_glut="yes" + GLUT_CFLAGS="" + GLUT_LIBS="" + else + GLUT_LIBS="${ax_cv_check_glut_libglut} ${GLUT_LIBS}" + fi +fi + +AC_SUBST([GLUT_CFLAGS]) +AC_SUBST([GLUT_LIBS]) +])dnl + +dnl --------------------------------------------------------------------------- +dnl Available from the GNU Autoconf Macro Archive at: +dnl http://www.gnu.org/software/ac-archive/acx_pthread.html +dnl --------------------------------------------------------------------------- + +dnl @synopsis ACX_PTHREAD([ACTION-IF-FOUND[, ACTION-IF-NOT-FOUND]]) +dnl +dnl This macro figures out how to build C programs using POSIX threads. +dnl It sets the PTHREAD_LIBS output variable to the threads library and +dnl linker flags, and the PTHREAD_CFLAGS output variable to any special +dnl C compiler flags that are needed. (The user can also force certain +dnl compiler flags/libs to be tested by setting these environment +dnl variables.) +dnl +dnl Also sets PTHREAD_CC to any special C compiler that is needed for +dnl multi-threaded programs (defaults to the value of CC otherwise). +dnl (This is necessary on AIX to use the special cc_r compiler alias.) +dnl +dnl NOTE: You are assumed to not only compile your program with these +dnl flags, but also link it with them as well. e.g. you should link +dnl with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS +dnl $LIBS +dnl +dnl If you are only building threads programs, you may wish to use +dnl these variables in your default LIBS, CFLAGS, and CC: +dnl +dnl LIBS="$PTHREAD_LIBS $LIBS" +dnl CFLAGS="$CFLAGS $PTHREAD_CFLAGS" +dnl CC="$PTHREAD_CC" +dnl +dnl In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute +dnl constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to +dnl that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX). +dnl +dnl ACTION-IF-FOUND is a list of shell commands to run if a threads +dnl library is found, and ACTION-IF-NOT-FOUND is a list of commands to +dnl run it if it is not found. If ACTION-IF-FOUND is not specified, the +dnl default action will define HAVE_PTHREAD. +dnl +dnl Please let the authors know if this macro fails on any platform, or +dnl if you have any other suggestions or comments. This macro was based +dnl on work by SGJ on autoconf scripts for FFTW (www.fftw.org) (with +dnl help from M. Frigo), as well as ac_pthread and hb_pthread macros +dnl posted by Alejandro Forero Cuervo to the autoconf macro repository. +dnl We are also grateful for the helpful feedback of numerous users. +dnl +dnl @category InstalledPackages +dnl @author Steven G. Johnson <stevenj@alum.mit.edu> +dnl @version 2005-01-14 +dnl @license GPLWithACException + +AC_DEFUN([ACX_PTHREAD], [ +AC_REQUIRE([AC_CANONICAL_HOST]) +AC_LANG_SAVE +AC_LANG_C +acx_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=$PTHREAD_CFLAGS]) + AC_TRY_LINK_FUNC(pthread_join, acx_pthread_ok=yes) + AC_MSG_RESULT($acx_pthread_ok) + if test x"$acx_pthread_ok" = xno; then + PTHREAD_LIBS="" + PTHREAD_CFLAGS="" + fi + LIBS="$save_LIBS" + CFLAGS="$save_CFLAGS" +fi + +# We must check for the threads library under a number of different +# names; the ordering is very important because some systems +# (e.g. DEC) have both -lpthread and -lpthreads, where one of the +# libraries is broken (non-POSIX). + +# Create a list of thread flags to try. Items starting with a "-" are +# C compiler flags, and other items are library names, except for "none" +# which indicates that we try without any flags at all, and "pthread-config" +# which is a program returning the flags for the Pth emulation library. + +acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config" + +# The ordering *is* (sometimes) important. Some notes on the +# individual items follow: + +# pthreads: AIX (must check this before -lpthread) +# none: in case threads are in libc; should be tried before -Kthread and +# other compiler flags to prevent continual compiler warnings +# -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) +# -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) +# lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) +# -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads) +# -pthreads: Solaris/gcc +# -mthreads: Mingw32/gcc, Lynx/gcc +# -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it +# doesn't hurt to check since this sometimes defines pthreads too; +# also defines -D_REENTRANT) +# pthread: Linux, etcetera +# --thread-safe: KAI C++ +# pthread-config: use pthread-config program (for GNU Pth library) + +case "${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 -pthread or + # -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: + + acx_pthread_flags="-pthread -pthreads pthread -mt $acx_pthread_flags" + ;; +esac + +if test x"$acx_pthread_ok" = xno; then +for flag in $acx_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(acx_pthread_config, pthread-config, yes, no) + if test x"$acx_pthread_config" = xno; then continue; fi + PTHREAD_CFLAGS="`pthread-config --cflags`" + PTHREAD_LIBS="`pthread-config --ldflags` `pthread-config --libs`" + ;; + + *) + AC_MSG_CHECKING([for the pthreads library -l$flag]) + PTHREAD_LIBS="-l$flag" + ;; + esac + + save_LIBS="$LIBS" + save_CFLAGS="$CFLAGS" + LIBS="$PTHREAD_LIBS $LIBS" + CFLAGS="$CFLAGS $PTHREAD_CFLAGS" + + # Check for various functions. We must include pthread.h, + # since some functions may be macros. (On the Sequent, we + # need a special flag -Kthread to make this header compile.) + # We check for pthread_join because it is in -lpthread on IRIX + # while pthread_create is in libc. We check for pthread_attr_init + # due to DEC craziness with -lpthreads. We check for + # pthread_cleanup_push because it is one of the few pthread + # functions on Solaris that doesn't have a non-functional libc stub. + # We try pthread_create on general principles. + AC_TRY_LINK([#include <pthread.h>], + [pthread_t th; pthread_join(th, 0); + pthread_attr_init(0); pthread_cleanup_push(0, 0); + pthread_create(0,0,0,0); pthread_cleanup_pop(0); ], + [acx_pthread_ok=yes]) + + LIBS="$save_LIBS" + CFLAGS="$save_CFLAGS" + + AC_MSG_RESULT($acx_pthread_ok) + if test "x$acx_pthread_ok" = xyes; then + break; + fi + + PTHREAD_LIBS="" + PTHREAD_CFLAGS="" +done +fi + +# Various other checks: +if test "x$acx_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;], + [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 cc_r + AC_CHECK_PROG(PTHREAD_CC, cc_r, cc_r, ${CC}) +else + PTHREAD_CC="$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"$acx_pthread_ok" = xyes; then + ifelse([$1],,AC_DEFINE(HAVE_PTHREAD,1,[Define if you have POSIX threads libraries and header files.]),[$1]) + : +else + acx_pthread_ok=no + $2 +fi +AC_LANG_RESTORE +])dnl ACX_PTHREAD |