dnl @synopsis AX_CREATE_STDINT_H [( HEADER-TO-GENERATE [, HEDERS-TO-CHECK])] dnl dnl the "ISO C9X: 7.18 Integer types " section requires the dnl existence of an include file that defines a set of dnl typedefs, especially uint8_t,int32_t,uintptr_t. dnl Many older installations will not provide this file, but some will dnl have the very same definitions in . In other enviroments dnl we can use the inet-types in which would define the dnl typedefs int8_t and u_int8_t respectivly. dnl dnl This macros will create a local "_stdint.h" or the headerfile given as dnl an argument. In many cases that file will just "#include " dnl or "#include ", while in other environments it will provide dnl the set of basic 'stdint's definitions/typedefs: dnl int8_t,uint8_t,int16_t,uint16_t,int32_t,uint32_t,intptr_t,uintptr_t dnl int_least32_t.. int_fast32_t.. intmax_t dnl which may or may not rely on the definitions of other files, dnl or using the AC_COMPILE_CHECK_SIZEOF macro to determine the actual dnl sizeof each type. dnl dnl if your header files require the stdint-types you will want to create an dnl installable file mylib-int.h that all your other installable header dnl may include. So if you have a library package named "mylib", just use dnl AX_CREATE_STDINT_H(mylib-int.h) dnl in configure.ac and go to install that very header file in Makefile.am dnl along with the other headers (mylib.h) - and the mylib-specific headers dnl can simply use "#include " to obtain the stdint-types. dnl dnl Remember, if the system already had a valid , the generated dnl file will include it directly. No need for fuzzy HAVE_STDINT_H things... dnl dnl @, (status: used on new platforms) (see http://ac-archive.sf.net/gstdint/) dnl @version $Id: acinclude.m4,v 1.4 2003/06/12 21:33:06 srw Exp $ dnl @author Guido Draheim AC_DEFUN([AX_CREATE_STDINT_H], [# ------ AX CREATE STDINT H ------------------------------------- AC_MSG_CHECKING([for stdint types]) ac_stdint_h=`echo ifelse($1, , _stdint.h, $1)` # try to shortcircuit - if the default include path of the compiler # can find a "stdint.h" header then we assume that all compilers can. AC_CACHE_VAL([ac_cv_header_stdint_t],[ old_CXXFLAGS="$CXXFLAGS" ; CXXFLAGS="" old_CPPFLAGS="$CPPFLAGS" ; CPPFLAGS="" old_CFLAGS="$CFLAGS" ; CFLAGS="" AC_TRY_COMPILE([#include ],[int_least32_t v = 0;], [ac_cv_stdint_result="(assuming C99 compatible system)" ac_cv_header_stdint_t="stdint.h"; ], [ac_cv_header_stdint_t=""]) CXXFLAGS="$old_CXXFLAGS" CPPFLAGS="$old_CPPFLAGS" CFLAGS="$old_CFLAGS" ]) v="... $ac_cv_header_stdint_h" if test "$ac_stdint_h" = "stdint.h" ; then AC_MSG_RESULT([(are you sure you want them in ./stdint.h?)]) elif test "$ac_stdint_h" = "inttypes.h" ; then AC_MSG_RESULT([(are you sure you want them in ./inttypes.h?)]) elif test "_$ac_cv_header_stdint_t" = "_" ; then AC_MSG_RESULT([(putting them into $ac_stdint_h)$v]) else ac_cv_header_stdint="$ac_cv_header_stdint_t" AC_MSG_RESULT([$ac_cv_header_stdint (shortcircuit)]) fi if test "_$ac_cv_header_stdint_t" = "_" ; then # can not shortcircuit.. dnl .....intro message done, now do a few system checks..... dnl btw, all CHECK_TYPE macros do automatically "DEFINE" a type, therefore dnl we use the autoconf implementation detail _AC CHECK_TYPE_NEW instead inttype_headers=`echo $2 | sed -e 's/,/ /g'` ac_cv_stdint_result="(no helpful system typedefs seen)" AC_CACHE_CHECK([for stdint uintptr_t], [ac_cv_header_stdint_x],[ ac_cv_header_stdint_x="" # the 1997 typedefs (inttypes.h) AC_MSG_RESULT([(..)]) for i in stdint.h inttypes.h sys/inttypes.h $inttype_headers ; do unset ac_cv_type_uintptr_t unset ac_cv_type_uint64_t _AC_CHECK_TYPE_NEW(uintptr_t,[ac_cv_header_stdint_x=$i],dnl continue,[#include <$i>]) AC_CHECK_TYPE(uint64_t,[and64="/uint64_t"],[and64=""],[#include<$i>]) ac_cv_stdint_result="(seen uintptr_t$and64 in $i)" break; done AC_MSG_CHECKING([for stdint uintptr_t]) ]) if test "_$ac_cv_header_stdint_x" = "_" ; then AC_CACHE_CHECK([for stdint uint32_t], [ac_cv_header_stdint_o],[ ac_cv_header_stdint_o="" # the 1995 typedefs (sys/inttypes.h) AC_MSG_RESULT([(..)]) for i in inttypes.h sys/inttypes.h stdint.h $inttype_headers ; do unset ac_cv_type_uint32_t unset ac_cv_type_uint64_t AC_CHECK_TYPE(uint32_t,[ac_cv_header_stdint_o=$i],dnl continue,[#include <$i>]) AC_CHECK_TYPE(uint64_t,[and64="/uint64_t"],[and64=""],[#include<$i>]) ac_cv_stdint_result="(seen uint32_t$and64 in $i)" break; done AC_MSG_CHECKING([for stdint uint32_t]) ]) fi if test "_$ac_cv_header_stdint_x" = "_" ; then if test "_$ac_cv_header_stdint_o" = "_" ; then AC_CACHE_CHECK([for stdint u_int32_t], [ac_cv_header_stdint_u],[ ac_cv_header_stdint_u="" # the BSD typedefs (sys/types.h) AC_MSG_RESULT([(..)]) for i in sys/types.h inttypes.h sys/inttypes.h $inttype_headers ; do unset ac_cv_type_u_int32_t unset ac_cv_type_u_int64_t AC_CHECK_TYPE(u_int32_t,[ac_cv_header_stdint_u=$i],dnl continue,[#include <$i>]) AC_CHECK_TYPE(u_int64_t,[and64="/u_int64_t"],[and64=""],[#include<$i>]) ac_cv_stdint_result="(seen u_int32_t$and64 in $i)" break; done AC_MSG_CHECKING([for stdint u_int32_t]) ]) fi fi dnl if there was no good C99 header file, do some typedef checks... if test "_$ac_cv_header_stdint_x" = "_" ; then AC_MSG_CHECKING([for stdint datatype model]) AC_MSG_RESULT([(..)]) AC_COMPILE_CHECK_SIZEOF(char) AC_COMPILE_CHECK_SIZEOF(short) AC_COMPILE_CHECK_SIZEOF(int) AC_COMPILE_CHECK_SIZEOF(long) AC_COMPILE_CHECK_SIZEOF(void*) ac_cv_stdint_char_model="" ac_cv_stdint_char_model="$ac_cv_stdint_char_model$ac_cv_sizeof_char" ac_cv_stdint_char_model="$ac_cv_stdint_char_model$ac_cv_sizeof_short" ac_cv_stdint_char_model="$ac_cv_stdint_char_model$ac_cv_sizeof_int" ac_cv_stdint_long_model="" ac_cv_stdint_long_model="$ac_cv_stdint_long_model$ac_cv_sizeof_int" ac_cv_stdint_long_model="$ac_cv_stdint_long_model$ac_cv_sizeof_long" ac_cv_stdint_long_model="$ac_cv_stdint_long_model$ac_cv_sizeof_voidp" name="$ac_cv_stdint_long_model" case "$ac_cv_stdint_char_model/$ac_cv_stdint_long_model" in 122/242) name="$name, IP16 (standard 16bit machine)" ;; 122/244) name="$name, LP32 (standard 32bit mac/win)" ;; 122/*) name="$name (unusual int16 model)" ;; 124/444) name="$name, ILP32 (standard 32bit unixish)" ;; 124/488) name="$name, LP64 (standard 64bit unixish)" ;; 124/448) name="$name, LLP64 (unusual 64bit unixish)" ;; 124/*) name="$name (unusual int32 model)" ;; 128/888) name="$name, ILP64 (unusual 64bit numeric)" ;; 128/*) name="$name (unusual int64 model)" ;; 222/*|444/*) name="$name (unusual dsptype)" ;; *) name="$name (very unusal model)" ;; esac AC_MSG_RESULT([combined for stdint datatype model... $name]) fi if test "_$ac_cv_header_stdint_x" != "_" ; then ac_cv_header_stdint="$ac_cv_header_stdint_x" elif test "_$ac_cv_header_stdint_o" != "_" ; then ac_cv_header_stdint="$ac_cv_header_stdint_o" elif test "_$ac_cv_header_stdint_u" != "_" ; then ac_cv_header_stdint="$ac_cv_header_stdint_u" else ac_cv_header_stdint="stddef.h" fi AC_MSG_CHECKING([for extra inttypes in chosen header]) AC_MSG_RESULT([($ac_cv_header_stdint)]) dnl see if int_least and int_fast types are present in _this_ header. unset ac_cv_type_int_least32_t unset ac_cv_type_int_fast32_t AC_CHECK_TYPE(int_least32_t,,,[#include <$ac_cv_header_stdint>]) AC_CHECK_TYPE(int_fast32_t,,,[#include<$ac_cv_header_stdint>]) AC_CHECK_TYPE(intmax_t,,,[#include <$ac_cv_header_stdint>]) fi # shortcircut to system "stdint.h" # ------------------ PREPARE VARIABLES ------------------------------ if test "$GCC" = "yes" ; then ac_cv_stdint_message="using gnu compiler "`$CC --version | head -1` else ac_cv_stdint_message="using $CC" fi AC_MSG_RESULT([make use of $ac_cv_header_stdint in $ac_stdint_h dnl $ac_cv_stdint_result]) # ----------------- DONE inttypes.h checks START header ------------- AC_CONFIG_COMMANDS([$ac_stdint_h],[ AC_MSG_NOTICE(creating $ac_stdint_h : $_ac_stdint_h) ac_stdint=$tmp/_stdint.h echo "#ifndef" $_ac_stdint_h >$ac_stdint echo "#define" $_ac_stdint_h "1" >>$ac_stdint echo "#ifndef" _GENERATED_STDINT_H >>$ac_stdint echo "#define" _GENERATED_STDINT_H '"'$PACKAGE $VERSION'"' >>$ac_stdint echo "/* generated $ac_cv_stdint_message */" >>$ac_stdint if test "_$ac_cv_header_stdint_t" != "_" ; then echo "#define _STDINT_HAVE_STDINT_H" "1" >>$ac_stdint fi cat >>$ac_stdint < #else #include /* .................... configured part ............................ */ STDINT_EOF echo "/* whether we have a C99 compatible stdint header file */" >>$ac_stdint if test "_$ac_cv_header_stdint_x" != "_" ; then ac_header="$ac_cv_header_stdint_x" echo "#define _STDINT_HEADER_INTPTR" '"'"$ac_header"'"' >>$ac_stdint else echo "/* #undef _STDINT_HEADER_INTPTR */" >>$ac_stdint fi echo "/* whether we have a C96 compatible inttypes header file */" >>$ac_stdint if test "_$ac_cv_header_stdint_o" != "_" ; then ac_header="$ac_cv_header_stdint_o" echo "#define _STDINT_HEADER_UINT32" '"'"$ac_header"'"' >>$ac_stdint else echo "/* #undef _STDINT_HEADER_UINT32 */" >>$ac_stdint fi echo "/* whether we have a BSD compatible inet types header */" >>$ac_stdint if test "_$ac_cv_header_stdint_u" != "_" ; then ac_header="$ac_cv_header_stdint_u" echo "#define _STDINT_HEADER_U_INT32" '"'"$ac_header"'"' >>$ac_stdint else echo "/* #undef _STDINT_HEADER_U_INT32 */" >>$ac_stdint fi echo "" >>$ac_stdint if test "_$ac_header" != "_" ; then if test "$ac_header" != "stddef.h" ; then echo "#include <$ac_header>" >>$ac_stdint echo "" >>$ac_stdint fi fi echo "/* which 64bit typedef has been found */" >>$ac_stdint if test "$ac_cv_type_uint64_t" = "yes" ; then echo "#define _STDINT_HAVE_UINT64_T" "1" >>$ac_stdint else echo "/* #undef _STDINT_HAVE_UINT64_T */" >>$ac_stdint fi if test "$ac_cv_type_u_int64_t" = "yes" ; then echo "#define _STDINT_HAVE_U_INT64_T" "1" >>$ac_stdint else echo "/* #undef _STDINT_HAVE_U_INT64_T */" >>$ac_stdint fi echo "" >>$ac_stdint echo "/* which type model has been detected */" >>$ac_stdint if test "_$ac_cv_stdint_char_model" != "_" ; then echo "#define _STDINT_CHAR_MODEL" "$ac_cv_stdint_char_model" >>$ac_stdint echo "#define _STDINT_LONG_MODEL" "$ac_cv_stdint_long_model" >>$ac_stdint else echo "/* #undef _STDINT_CHAR_MODEL // skipped */" >>$ac_stdint echo "/* #undef _STDINT_LONG_MODEL // skipped */" >>$ac_stdint fi echo "" >>$ac_stdint echo "/* whether int_least types were detected */" >>$ac_stdint if test "$ac_cv_type_int_least32_t" = "yes"; then echo "#define _STDINT_HAVE_INT_LEAST32_T" "1" >>$ac_stdint else echo "/* #undef _STDINT_HAVE_INT_LEAST32_T */" >>$ac_stdint fi echo "/* whether int_fast types were detected */" >>$ac_stdint if test "$ac_cv_type_int_fast32_t" = "yes"; then echo "#define _STDINT_HAVE_INT_FAST32_T" "1" >>$ac_stdint else echo "/* #undef _STDINT_HAVE_INT_FAST32_T */" >>$ac_stdint fi echo "/* whether intmax_t type was detected */" >>$ac_stdint if test "$ac_cv_type_intmax_t" = "yes"; then echo "#define _STDINT_HAVE_INTMAX_T" "1" >>$ac_stdint else echo "/* #undef _STDINT_HAVE_INTMAX_T */" >>$ac_stdint fi echo "" >>$ac_stdint cat >>$ac_stdint <= 199901L #define _HAVE_UINT64_T typedef long long int64_t; typedef unsigned long long uint64_t; #elif !defined __STRICT_ANSI__ #if defined _MSC_VER || defined __WATCOMC__ || defined __BORLANDC__ #define _HAVE_UINT64_T typedef __int64 int64_t; typedef unsigned __int64 uint64_t; #elif defined __GNUC__ || defined __MWERKS__ || defined __ELF__ /* note: all ELF-systems seem to have loff-support which needs 64-bit */ #if !defined _NO_LONGLONG #define _HAVE_UINT64_T typedef long long int64_t; typedef unsigned long long uint64_t; #endif #elif defined __alpha || (defined __mips && defined _ABIN32) #if !defined _NO_LONGLONG typedef long int64_t; typedef unsigned long uint64_t; #endif /* compiler/cpu type to define int64_t */ #endif #endif #endif #if defined _STDINT_HAVE_U_INT_TYPES /* int8_t int16_t int32_t defined by inet code, redeclare the u_intXX types */ typedef u_int8_t uint8_t; typedef u_int16_t uint16_t; typedef u_int32_t uint32_t; /* glibc compatibility */ #ifndef __int8_t_defined #define __int8_t_defined #endif #endif #ifdef _STDINT_NEED_INT_MODEL_T /* we must guess all the basic types. Apart from byte-adressable system, */ /* there a few 32-bit-only dsp-systems that we guard with BYTE_MODEL 8-} */ /* (btw, those nibble-addressable systems are way off, or so we assume) */ dnl /* have a look at "64bit and data size neutrality" at */ dnl /* http://unix.org/version2/whatsnew/login_64bit.html */ dnl /* (the shorthand "ILP" types always have a "P" part) */ #if defined _STDINT_BYTE_MODEL #if _STDINT_LONG_MODEL+0 == 242 /* 2:4:2 = IP16 = a normal 16-bit system */ typedef unsigned char uint8_t; typedef unsigned short uint16_t; typedef unsigned long uint32_t; #ifndef __int8_t_defined #define __int8_t_defined typedef char int8_t; typedef short int16_t; typedef long int32_t; #endif #elif _STDINT_LONG_MODEL+0 == 244 || _STDINT_LONG_MODEL == 444 /* 2:4:4 = LP32 = a 32-bit system derived from a 16-bit */ /* 4:4:4 = ILP32 = a normal 32-bit system */ typedef unsigned char uint8_t; typedef unsigned short uint16_t; typedef unsigned int uint32_t; #ifndef __int8_t_defined #define __int8_t_defined typedef char int8_t; typedef short int16_t; typedef int int32_t; #endif #elif _STDINT_LONG_MODEL+0 == 484 || _STDINT_LONG_MODEL+0 == 488 /* 4:8:4 = IP32 = a 32-bit system prepared for 64-bit */ /* 4:8:8 = LP64 = a normal 64-bit system */ typedef unsigned char uint8_t; typedef unsigned short uint16_t; typedef unsigned int uint32_t; #ifndef __int8_t_defined #define __int8_t_defined typedef char int8_t; typedef short int16_t; typedef int int32_t; #endif /* this system has a "long" of 64bit */ #ifndef _HAVE_UINT64_T #define _HAVE_UINT64_T typedef unsigned long uint64_t; typedef long int64_t; #endif #elif _STDINT_LONG_MODEL+0 == 448 /* LLP64 a 64-bit system derived from a 32-bit system */ typedef unsigned char uint8_t; typedef unsigned short uint16_t; typedef unsigned int uint32_t; #ifndef __int8_t_defined #define __int8_t_defined typedef char int8_t; typedef short int16_t; typedef int int32_t; #endif /* assuming the system has a "long long" */ #ifndef _HAVE_UINT64_T #define _HAVE_UINT64_T typedef unsigned long long uint64_t; typedef long long int64_t; #endif #else #define _STDINT_NO_INT32_T #endif #else #define _STDINT_NO_INT8_T #define _STDINT_NO_INT32_T #endif #endif /* * quote from SunOS-5.8 sys/inttypes.h: * Use at your own risk. As of February 1996, the committee is squarely * behind the fixed sized types; the "least" and "fast" types are still being * discussed. The probability that the "fast" types may be removed before * the standard is finalized is high enough that they are not currently * implemented. */ #if defined _STDINT_NEED_INT_LEAST_T typedef int8_t int_least8_t; typedef int16_t int_least16_t; typedef int32_t int_least32_t; #ifdef _HAVE_UINT64_T typedef int64_t int_least64_t; #endif typedef uint8_t uint_least8_t; typedef uint16_t uint_least16_t; typedef uint32_t uint_least32_t; #ifdef _HAVE_UINT64_T typedef uint64_t uint_least64_t; #endif /* least types */ #endif #if defined _STDINT_NEED_INT_FAST_T typedef int8_t int_fast8_t; typedef int int_fast16_t; typedef int32_t int_fast32_t; #ifdef _HAVE_UINT64_T typedef int64_t int_fast64_t; #endif typedef uint8_t uint_fast8_t; typedef unsigned uint_fast16_t; typedef uint32_t uint_fast32_t; #ifdef _HAVE_UINT64_T typedef uint64_t uint_fast64_t; #endif /* fast types */ #endif #ifdef _STDINT_NEED_INTMAX_T #ifdef _HAVE_UINT64_T typedef int64_t intmax_t; typedef uint64_t uintmax_t; #else typedef long intmax_t; typedef unsigned long uintmax_t; #endif #endif #ifdef _STDINT_NEED_INTPTR_T #ifndef __intptr_t_defined #define __intptr_t_defined /* we encourage using "long" to store pointer values, never use "int" ! */ #if _STDINT_LONG_MODEL+0 == 242 || _STDINT_LONG_MODEL+0 == 484 typedef unsinged int uintptr_t; typedef int intptr_t; #elif _STDINT_LONG_MODEL+0 == 244 || _STDINT_LONG_MODEL+0 == 444 typedef unsigned long uintptr_t; typedef long intptr_t; #elif _STDINT_LONG_MODEL+0 == 448 && defined _HAVE_UINT64_T typedef uint64_t uintptr_t; typedef int64_t intptr_t; #else /* matches typical system types ILP32 and LP64 - but not IP16 or LLP64 */ typedef unsigned long uintptr_t; typedef long intptr_t; #endif #endif #endif /* shortcircuit*/ #endif /* once */ #endif #endif STDINT_EOF if cmp -s $ac_stdint_h $ac_stdint 2>/dev/null; then AC_MSG_NOTICE([$ac_stdint_h is unchanged]) else ac_dir=`AS_DIRNAME(["$ac_stdint_h"])` AS_MKDIR_P(["$ac_dir"]) rm -f $ac_stdint_h mv $ac_stdint $ac_stdint_h fi ],[# variables for create stdint.h replacement PACKAGE="$PACKAGE" VERSION="$VERSION" ac_stdint_h="$ac_stdint_h" _ac_stdint_h=AS_TR_CPP(_$PACKAGE-$ac_stdint_h) ac_cv_stdint_message="$ac_cv_stdint_message" ac_cv_header_stdint_t="$ac_cv_header_stdint_t" ac_cv_header_stdint_x="$ac_cv_header_stdint_x" ac_cv_header_stdint_o="$ac_cv_header_stdint_o" ac_cv_header_stdint_u="$ac_cv_header_stdint_u" ac_cv_type_uint64_t="$ac_cv_type_uint64_t" ac_cv_type_u_int64_t="$ac_cv_type_u_int64_t" ac_cv_stdint_char_model="$ac_cv_stdint_char_model" ac_cv_stdint_long_model="$ac_cv_stdint_long_model" ac_cv_type_int_least32_t="$ac_cv_type_int_least32_t" ac_cv_type_int_fast32_t="$ac_cv_type_int_fast32_t" ac_cv_type_intmax_t="$ac_cv_type_intmax_t" ]) ]) dnl Available from the GNU Autoconf Macro Archive at: dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_compile_check_sizeof.html dnl AC_DEFUN([AC_COMPILE_CHECK_SIZEOF], [changequote(<<, >>)dnl dnl The name to #define. define(<>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl dnl The cache variable name. define(<>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl changequote([, ])dnl AC_MSG_CHECKING(size of $1) AC_CACHE_VAL(AC_CV_NAME, [for ac_size in 4 8 1 2 16 $2 ; do # List sizes in rough order of prevalence. AC_TRY_COMPILE([#include "confdefs.h" #include $2 ], [switch (0) case 0: case (sizeof ($1) == $ac_size):;], AC_CV_NAME=$ac_size) if test x$AC_CV_NAME != x ; then break; fi done ]) if test x$AC_CV_NAME = x ; then AC_MSG_ERROR([cannot determine a size for $1]) fi AC_MSG_RESULT($AC_CV_NAME) AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME, [The number of bytes in type $1]) undefine([AC_TYPE_NAME])dnl undefine([AC_CV_NAME])dnl ]) dnl Available from the GNU Autoconf Macro Archive at: dnl http://www.gnu.org/software/ac-archive/htmldoc/acx_pthread.html dnl AC_DEFUN([ACX_PTHREAD], [ AC_REQUIRE([AC_CANONICAL_HOST]) AC_LANG_SAVE AC_LANG_C acx_pthread_ok=no # We used to check for pthread.h first, but this fails if pthread.h # requires special compiler flags (e.g. on True64 or Sequent). # It gets checked for in the link test anyway. # First of all, check if the user has set any of the PTHREAD_LIBS, # etcetera environment variables, and if threads linking works using # them: if test x"$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="$save_CFLAGS" fi # We must check for the threads library under a number of different # names; the ordering is very important because some systems # (e.g. DEC) have both -lpthread and -lpthreads, where one of the # libraries is broken (non-POSIX). # Create a list of thread flags to try. Items starting with a "-" are # C compiler flags, and other items are library names, except for "none" # which indicates that we try without any flags at all. acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt" # The ordering *is* (sometimes) important. Some notes on the # individual items follow: # pthreads: AIX (must check this before -lpthread) # none: in case threads are in libc; should be tried before -Kthread and # other compiler flags to prevent continual compiler warnings # -Kthread: Sequent (threads in libc, but -Kthread needed for pthread.h) # -kthread: FreeBSD kernel threads (preferred to -pthread since SMP-able) # lthread: LinuxThreads port on FreeBSD (also preferred to -pthread) # -pthread: Linux/gcc (kernel threads), BSD/gcc (userland threads) # -pthreads: Solaris/gcc # -mthreads: Mingw32/gcc, Lynx/gcc # -mt: Sun Workshop C (may only link SunOS threads [-lthread], but it # doesn't hurt to check since this sometimes defines pthreads too; # also defines -D_REENTRANT) # pthread: Linux, etcetera # --thread-safe: KAI C++ case "${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" ;; *) 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 $PTHREAD_CFLAGS" # Detect AIX lossage: threads are created detached by default # and the JOINABLE attribute has a nonstandard name (UNDETACHED). AC_MSG_CHECKING([for joinable pthread attribute]) AC_TRY_LINK([#include ], [int attr=PTHREAD_CREATE_JOINABLE;], ok=PTHREAD_CREATE_JOINABLE, ok=unknown) if test x"$ok" = xunknown; then AC_TRY_LINK([#include ], [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