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Diffstat (limited to 'm4/ax_check_gl.m4')
| -rw-r--r-- | m4/ax_check_gl.m4 | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/m4/ax_check_gl.m4 b/m4/ax_check_gl.m4 new file mode 100644 index 0000000..124760c --- /dev/null +++ b/m4/ax_check_gl.m4 @@ -0,0 +1,335 @@ +# Copied from +# http://ac-archive.sourceforge.net/ +# + +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 $PTHREAD_CFLAGS" + + # Detect AIX lossage: threads are created detached by default + # and the JOINABLE attribute has a nonstandard name (UNDETACHED). + AC_MSG_CHECKING([for joinable pthread attribute]) + AC_TRY_LINK([#include <pthread.h>], + [int attr=PTHREAD_CREATE_JOINABLE;], + ok=PTHREAD_CREATE_JOINABLE, ok=unknown) + if test x"$ok" = xunknown; then + AC_TRY_LINK([#include <pthread.h>], + [int attr=PTHREAD_CREATE_UNDETACHED;], + ok=PTHREAD_CREATE_UNDETACHED, ok=unknown) + fi + if test x"$ok" != xPTHREAD_CREATE_JOINABLE; then + AC_DEFINE(PTHREAD_CREATE_JOINABLE, $ok, + [Define to the necessary symbol if this constant + uses a non-standard name on your system.]) + fi + AC_MSG_RESULT(${ok}) + if test x"$ok" = xunknown; then + AC_MSG_WARN([we do not know how to create joinable pthreads]) + fi + + AC_MSG_CHECKING([if more special flags are required for pthreads]) + flag=no + case "${host_cpu}-${host_os}" in + *-aix* | *-freebsd*) flag="-D_THREAD_SAFE";; + *solaris* | *-osf* | *-hpux*) flag="-D_REENTRANT";; + esac + AC_MSG_RESULT(${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 + + + +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. +# libavg change: We just assume that libavg should always run using the mac +# OpenGL framework on OS X. +# +if test $target_vendor = apple; then + AC_DEFINE([HAVE_APPLE_OPENGL_FRAMEWORK], [1], + [Use the Apple OpenGL framework.]) + AC_MSG_NOTICE([Using Apple OpenGL framework]) + GL_CFLAGS="" + GL_LIBS="-framework OpenGL -framework AGL" +else + GL_CFLAGS="${PTHREAD_CFLAGS}" + GL_LIBS="${PTHREAD_LIBS} -lm" + + # + # Use x_includes and x_libraries if they have been set (presumably by + # AC_PATH_X). + # + if test "X$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 ${GL_LIBS}" + fi + fi + + AC_LANG_PUSH(C) + + AC_CHECK_HEADERS([windows.h]) + + AC_CACHE_CHECK([for OpenGL library], [ax_cv_check_gl_libgl], + [ax_cv_check_gl_libgl="no" + ax_save_CPPFLAGS="${CPPFLAGS}" + CPPFLAGS="${GL_CFLAGS} ${CPPFLAGS}" + ax_save_LIBS="${LIBS}" + LIBS="" + ax_check_libs="-lopengl32 -lGL" + for ax_lib in ${ax_check_libs}; do + if test "X$CC" = "Xcl"; 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} ${ax_save_LIBS}" + AC_TRY_LINK([ +# if HAVE_WINDOWS_H && defined(_WIN32) +# include <windows.h> +# endif +# include <GL/gl.h> +], + [glBegin(0)], + [ax_cv_check_gl_libgl="${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} ${GL_LIBS}" + fi + AC_LANG_POP(C) +fi + +AC_SUBST([GL_CFLAGS]) +AC_SUBST([GL_LIBS]) +])dnl + + +AC_DEFUN([AX_CHECK_GLU], +[AC_REQUIRE([AX_CHECK_GL])dnl +GLU_CFLAGS="${GL_CFLAGS}" +if test $target_vendor != apple; then + AC_CACHE_CHECK([for OpenGL Utility library], [ax_cv_check_glu_libglu], + [ax_cv_check_glu_libglu="no" + ax_save_CPPFLAGS="${CPPFLAGS}" + CPPFLAGS="${GL_CFLAGS} ${CPPFLAGS}" + ax_save_LIBS="${LIBS}" + LIBS="" + ax_check_libs="-lglu32 -lGLU" + for ax_lib in ${ax_check_libs}; do + if test "X$CC" = "Xcl"; 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} ${ax_save_LIBS}" + # + # libGLU typically links with libstdc++ on POSIX platforms. However, + # setting the language to C++ means that test program source is named + # "conftest.cc"; and Microsoft cl doesn't know what to do with such a + # file. + # + if test "X$CXX" != "Xcl"; then + AC_LANG_PUSH([C++]) + fi + AC_TRY_LINK([ +# if HAVE_WINDOWS_H && defined(_WIN32) +# include <windows.h> +# endif +# include <GL/glu.h> +], + [gluBeginCurve(0)], + [ax_cv_check_glu_libglu="${ax_try_lib}"; break]) + if test "X$CXX" != "Xcl"; then + AC_LANG_POP([C++]) + fi + done + LIBS=${ax_save_LIBS} + CPPFLAGS=${ax_save_CPPFLAGS}]) + if test "X${ax_cv_check_glu_libglu}" = "Xno"; then + no_gl="yes" + GLU_CFLAGS="" + GLU_LIBS="" + else + GLU_LIBS="${ax_cv_check_glu_libglu} ${GL_LIBS}" + fi +fi +AC_SUBST([GLU_CFLAGS]) +AC_SUBST([GLU_LIBS]) +]) + |