dnl -*- mode: autoconf -*- # AX_C_FLOAT_WORDS_BIGENDIAN ([ACTION-IF-TRUE], [ACTION-IF-FALSE], # [ACTION-IF-UNKNOWN]) # # Checks the ordering of words within a multi-word float. This check # is necessary because on some systems (e.g. certain ARM systems), the # float word ordering can be different from the byte ordering. In a # multi-word float context, "big-endian" implies that the word containing # the sign bit is found in the memory location with the lowest address. # This implemenation was inspired by the AC_C_BIGENDIAN macro in autoconf. # ------------------------------------------------------------------------- AC_DEFUN([AX_C_FLOAT_WORDS_BIGENDIAN], [AC_CACHE_CHECK(whether float word ordering is bigendian, ax_cv_c_float_words_bigendian, [ # The endianess is detected by first compiling C code that contains a special # double float value, then grepping the resulting object file for certain # strings of ascii values. The double is specially crafted to have a # binary representation that corresponds with a simple string. In this # implementation, the string "noonsees" was selected because the individual # word values ("noon" and "sees") are palindromes, thus making this test # byte-order agnostic. If grep finds the string "noonsees" in the object # file, the target platform stores float words in big-endian order. If grep # finds "seesnoon", float words are in little-endian order. If neither value # is found, the user is instructed to specify the ordering. ax_cv_c_float_words_bigendian=unknown AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ double d = 90904234967036810337470478905505011476211692735615632014797120844053488865816695273723469097858056257517020191247487429516932130503560650002327564517570778480236724525140520121371739201496540132640109977779420565776568942592.0; ]])], [ if strings - conftest.$ac_objext | grep noonsees >/dev/null ; then ax_cv_c_float_words_bigendian=yes fi if strings - conftest.$ac_objext | grep seesnoon >/dev/null ; then if test "$ax_cv_c_float_words_bigendian" = unknown; then ax_cv_c_float_words_bigendian=no else ax_cv_c_float_words_bigendian=unknown fi fi ])]) case $ax_cv_c_float_words_bigendian in yes) m4_default([$1], [AC_DEFINE([FLOAT_WORDS_BIGENDIAN], 1, [Define to 1 if your system stores words within floats with the most significant word first])]) ;; no) $2 ;; *) m4_default([$3], [AC_MSG_ERROR([ Unknown float word ordering. You need to manually preset ax_cv_c_float_words_bigendian=no (or yes) according to your system. ])]) ;; esac ]) # AX_C_FLOAT_WORDS_BIGENDIAN ##### http://autoconf-archive.cryp.to/acx_pthread.html # # SYNOPSIS # # ACX_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 link it with them as well. e.g. you should link # with $PTHREAD_CC $CFLAGS $PTHREAD_CFLAGS $LDFLAGS ... $PTHREAD_LIBS # $LIBS # # If you are only building threads programs, you may wish to use # these variables in your default LIBS, CFLAGS, and CC: # # LIBS="$PTHREAD_LIBS $LIBS" # CFLAGS="$CFLAGS $PTHREAD_CFLAGS" # CC="$PTHREAD_CC" # # In addition, if the PTHREAD_CREATE_JOINABLE thread-attribute # constant has a nonstandard name, defines PTHREAD_CREATE_JOINABLE to # that name (e.g. PTHREAD_CREATE_UNDETACHED on AIX). # # 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. # # LAST MODIFICATION # # 2006-05-29 # # COPYLEFT # # Copyright (c) 2006 Steven G. Johnson # # 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 2 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, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA # 02111-1307, USA. # # 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 Macro 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. 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="$save_CFLAGS" fi # We must check for the threads library under a number of different # names; the ordering is very important because some systems # (e.g. DEC) have both -lpthread and -lpthreads, where one of the # libraries is broken (non-POSIX). # Create a list of thread flags to try. Items starting with a "-" are # C compiler flags, and other items are library names, except for "none" # which indicates that we try without any flags at all, and "pthread-config" # which is a program returning the flags for the Pth emulation library. acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config" # The ordering *is* (sometimes) important. Some notes on the # individual items follow: # pthreads: AIX (must check this before -lpthread) # none: in case threads are in libc; should be tried before -Kthread and # other compiler flags to prevent continual compiler warnings # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads) # -pthreads: Solaris/gcc # -mthreads: Mingw32/gcc, Lynx/gcc # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it # doesn't hurt to check since this sometimes defines pthreads too; # also defines -D_REENTRANT) # ... -mt is also the pthreads flag for HP/aCC # pthread: Linux, etcetera # --thread-safe: KAI C++ # pthread-config: use pthread-config program (for GNU Pth library) case "${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 -pthreads/-mt/ # -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="-pthreads pthread -mt -pthread $acx_pthread_flags" ;; esac if test x"$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 $PTHREAD_CFLAGS" # Check for various functions. We must include pthread.h, # since some functions may be macros. (On the Sequent, we # need a special flag -Kthread to make this header compile.) # We check for pthread_join because it is in -lpthread on IRIX # while pthread_create is in libc. We check for pthread_attr_init # due to DEC craziness with -lpthreads. We check for # pthread_cleanup_push because it is one of the few pthread # functions on Solaris that doesn't have a non-functional libc stub. # We try pthread_create on general principles. AC_TRY_LINK([#include ], [pthread_t th; pthread_join(th, 0); pthread_attr_init(0); pthread_cleanup_push(0, 0); pthread_create(0,0,0,0); pthread_cleanup_pop(0); ], [acx_pthread_ok=yes]) LIBS="$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 $PTHREAD_CFLAGS" # Detect AIX lossage: JOINABLE attribute is called UNDETACHED. AC_MSG_CHECKING([for joinable pthread attribute]) attr_name=unknown for attr in PTHREAD_CREATE_JOINABLE PTHREAD_CREATE_UNDETACHED; do AC_TRY_LINK([#include ], [int attr=$attr; return 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="$save_CFLAGS" # More AIX lossage: must compile with xlc_r or cc_r if test x"$GCC" != xyes; then AC_CHECK_PROGS(PTHREAD_CC, xlc_r cc_r, ${CC}) else PTHREAD_CC=$CC fi 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 $2 fi AC_LANG_RESTORE ])dnl ACX_PTHREAD ##### http://autoconf-archive.cryp.to/ax_lang_compiler_ms.html # # SYNOPSIS # # AX_LANG_COMPILER_MS # # DESCRIPTION # # Check whether the compiler for the current language is Microsoft. # # This macro is modeled after _AC_LANG_COMPILER_GNU in the GNU # Autoconf implementation. # # LAST MODIFICATION # # 2004-11-15 # # COPYLEFT # # Copyright (c) 2004 Braden McDaniel # # Copying and distribution of this file, with or without # modification, are permitted in any medium without royalty provided # the copyright notice and this notice are preserved. AC_DEFUN([AX_LANG_COMPILER_MS], [AC_CACHE_CHECK([whether we are using the Microsoft _AC_LANG compiler], [ax_cv_[]_AC_LANG_ABBREV[]_compiler_ms], [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[#ifndef _MSC_VER choke me #endif ]])], [ax_compiler_ms=yes], [ax_compiler_ms=no]) ax_cv_[]_AC_LANG_ABBREV[]_compiler_ms=$ax_compiler_ms ])]) ##### http://autoconf-archive.cryp.to/ax_check_gl.html # # SYNOPSIS # # AX_CHECK_GL # # DESCRIPTION # # Check for an OpenGL implementation. If GL is found, the required # compiler and linker flags are included in the output variables # "GL_CFLAGS" and "GL_LIBS", respectively. This macro adds the # configure option "--with-apple-opengl-framework", which users can # use to indicate that Apple's OpenGL framework should be used on Mac # OS X. If Apple's OpenGL framework is used, the symbol # "HAVE_APPLE_OPENGL_FRAMEWORK" is defined. If no GL implementation # is found, "no_gl" is set to "yes". # # LAST MODIFICATION # # 2004-11-15 # # COPYLEFT # # Copyright (c) 2004 Braden McDaniel # # Copying and distribution of this file, with or without # modification, are permitted in any medium without royalty provided # the copyright notice and this notice are preserved. 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} ${ax_save_LIBS}" AC_LINK_IFELSE( [AC_LANG_PROGRAM([[ # if HAVE_WINDOWS_H && defined(_WIN32) # include # endif # include ]], [[glBegin(0)]])], [ax_cv_check_gl_libgl="${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