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: ax_create_stdint_h.m4,v 1.2 2003/02/10 01:06:52 guidod 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 @synopsis AC_COMPILE_CHECK_SIZEOF(TYPE [, HEADERS [, EXTRA_SIZES...]]) dnl dnl This macro checks for the size of TYPE using compile checks, not dnl run checks. You can supply extra HEADERS to look into. the check dnl will cycle through 1 2 4 8 16 and any EXTRA_SIZES the user dnl supplies. If a match is found, it will #define SIZEOF_`TYPE' to dnl that value. Otherwise it will emit a configure time error dnl indicating the size of the type could not be determined. dnl dnl The trick is that C will not allow duplicate case labels. While dnl this is valid C code: dnl dnl switch (0) case 0: case 1:; dnl dnl The following is not: dnl dnl switch (0) case 0: case 0:; dnl dnl Thus, the AC_TRY_COMPILE will fail if the currently tried size dnl does not match. dnl dnl Here is an example skeleton configure.in script, demonstrating the dnl macro's usage: dnl dnl AC_PROG_CC dnl AC_CHECK_HEADERS(stddef.h unistd.h) dnl AC_TYPE_SIZE_T dnl AC_CHECK_TYPE(ssize_t, int) dnl dnl headers='#ifdef HAVE_STDDEF_H dnl #include dnl #endif dnl #ifdef HAVE_UNISTD_H dnl #include dnl #endif dnl ' dnl dnl AC_COMPILE_CHECK_SIZEOF(char) dnl AC_COMPILE_CHECK_SIZEOF(short) dnl AC_COMPILE_CHECK_SIZEOF(int) dnl AC_COMPILE_CHECK_SIZEOF(long) dnl AC_COMPILE_CHECK_SIZEOF(unsigned char *) dnl AC_COMPILE_CHECK_SIZEOF(void *) dnl AC_COMPILE_CHECK_SIZEOF(size_t, $headers) dnl AC_COMPILE_CHECK_SIZEOF(ssize_t, $headers) dnl AC_COMPILE_CHECK_SIZEOF(ptrdiff_t, $headers) dnl AC_COMPILE_CHECK_SIZEOF(off_t, $headers) dnl dnl @author Kaveh Ghazi dnl @version $Id: ac_compile_check_sizeof.m4,v 1.1.1.1 2001/07/26 00:46:24 guidod Exp $ 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 ])