1 AC_DEFUN([GCC_STDINT_TYPES],
2 [AC_REQUIRE([AC_TYPE_INT8_T])
3 AC_REQUIRE([AC_TYPE_INT16_T])
4 AC_REQUIRE([AC_TYPE_INT32_T])
5 AC_REQUIRE([AC_TYPE_INT64_T])
6 AC_REQUIRE([AC_TYPE_INTMAX_T])
7 AC_REQUIRE([AC_TYPE_INTPTR_T])
8 AC_REQUIRE([AC_TYPE_UINT8_T])
9 AC_REQUIRE([AC_TYPE_UINT16_T])
10 AC_REQUIRE([AC_TYPE_UINT32_T])
11 AC_REQUIRE([AC_TYPE_UINT64_T])
12 AC_REQUIRE([AC_TYPE_UINTMAX_T])
13 AC_REQUIRE([AC_TYPE_UINTPTR_T])])
15 dnl @synopsis GCC_HEADER_STDINT [( HEADER-TO-GENERATE [, HEADERS-TO-CHECK])]
17 dnl the "ISO C9X: 7.18 Integer types <stdint.h>" section requires the
18 dnl existence of an include file <stdint.h> that defines a set of
19 dnl typedefs, especially uint8_t,int32_t,uintptr_t.
20 dnl Many older installations will not provide this file, but some will
21 dnl have the very same definitions in <inttypes.h>. In other environments
22 dnl we can use the inet-types in <sys/types.h> which would define the
23 dnl typedefs int8_t and u_int8_t respectivly.
25 dnl This macros will create a local "_stdint.h" or the headerfile given as
26 dnl an argument. In many cases that file will pick the definition from a
27 dnl "#include <stdint.h>" or "#include <inttypes.h>" statement, while
28 dnl in other environments it will provide the set of basic 'stdint's defined:
29 dnl int8_t,uint8_t,int16_t,uint16_t,int32_t,uint32_t,intptr_t,uintptr_t
30 dnl int_least32_t.. int_fast32_t.. intmax_t
31 dnl which may or may not rely on the definitions of other files.
33 dnl Sometimes the stdint.h or inttypes.h headers conflict with sys/types.h,
34 dnl so we test the headers together with sys/types.h and always include it
35 dnl into the generated header (to match the tests with the generated file).
36 dnl Hopefully this is not a big annoyance.
38 dnl If your installed header files require the stdint-types you will want to
39 dnl create an installable file mylib-int.h that all your other installable
40 dnl header may include. So, for a library package named "mylib", just use
41 dnl GCC_HEADER_STDINT(mylib-int.h)
42 dnl in configure.ac and install that header file in Makefile.am along with
43 dnl the other headers (mylib.h). The mylib-specific headers can simply
44 dnl use "#include <mylib-int.h>" to obtain the stdint-types.
46 dnl Remember, if the system already had a valid <stdint.h>, the generated
47 dnl file will include it directly. No need for fuzzy HAVE_STDINT_H things...
49 dnl @author Guido Draheim <guidod@gmx.de>, Paolo Bonzini <bonzini@gnu.org>
51 AC_DEFUN([GCC_HEADER_STDINT],
52 [m4_define(_GCC_STDINT_H, m4_ifval($1, $1, _stdint.h))
54 inttype_headers=`echo inttypes.h sys/inttypes.h $2 | sed -e 's/,/ /g'`
56 acx_cv_header_stdint=stddef.h
57 acx_cv_header_stdint_kind="(already complete)"
58 for i in stdint.h $inttype_headers; do
59 unset ac_cv_type_uintptr_t
60 unset ac_cv_type_uintmax_t
61 unset ac_cv_type_int_least32_t
62 unset ac_cv_type_int_fast32_t
63 unset ac_cv_type_uint64_t
64 _AS_ECHO_N([looking for a compliant stdint.h in $i, ])
65 AC_CHECK_TYPE(uintmax_t,[acx_cv_header_stdint=$i],continue,[#include <sys/types.h>
67 AC_CHECK_TYPE(uintptr_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h>
69 AC_CHECK_TYPE(int_least32_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h>
71 AC_CHECK_TYPE(int_fast32_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h>
73 AC_CHECK_TYPE(uint64_t,,[acx_cv_header_stdint_kind="(lacks uint64_t)"], [#include <sys/types.h>
77 if test "$acx_cv_header_stdint" = stddef.h; then
78 acx_cv_header_stdint_kind="(lacks uintmax_t)"
79 for i in stdint.h $inttype_headers; do
80 unset ac_cv_type_uintptr_t
81 unset ac_cv_type_uint32_t
82 unset ac_cv_type_uint64_t
83 _AS_ECHO_N([looking for an incomplete stdint.h in $i, ])
84 AC_CHECK_TYPE(uint32_t,[acx_cv_header_stdint=$i],continue,[#include <sys/types.h>
86 AC_CHECK_TYPE(uint64_t,,,[#include <sys/types.h>
88 AC_CHECK_TYPE(uintptr_t,,,[#include <sys/types.h>
93 if test "$acx_cv_header_stdint" = stddef.h; then
94 acx_cv_header_stdint_kind="(u_intXX_t style)"
95 for i in sys/types.h $inttype_headers; do
96 unset ac_cv_type_u_int32_t
97 unset ac_cv_type_u_int64_t
98 _AS_ECHO_N([looking for u_intXX_t types in $i, ])
99 AC_CHECK_TYPE(u_int32_t,[acx_cv_header_stdint=$i],continue,[#include <sys/types.h>
101 AC_CHECK_TYPE(u_int64_t,,,[#include <sys/types.h>
106 if test "$acx_cv_header_stdint" = stddef.h; then
107 acx_cv_header_stdint_kind="(using manual detection)"
110 test -z "$ac_cv_type_uintptr_t" && ac_cv_type_uintptr_t=no
111 test -z "$ac_cv_type_uint64_t" && ac_cv_type_uint64_t=no
112 test -z "$ac_cv_type_u_int64_t" && ac_cv_type_u_int64_t=no
113 test -z "$ac_cv_type_int_least32_t" && ac_cv_type_int_least32_t=no
114 test -z "$ac_cv_type_int_fast32_t" && ac_cv_type_int_fast32_t=no
116 # ----------------- Summarize what we found so far
118 AC_MSG_CHECKING([what to include in _GCC_STDINT_H])
120 case `AS_BASENAME(_GCC_STDINT_H)` in
121 stdint.h) AC_MSG_WARN([are you sure you want it there?]) ;;
122 inttypes.h) AC_MSG_WARN([are you sure you want it there?]) ;;
126 AC_MSG_RESULT($acx_cv_header_stdint $acx_cv_header_stdint_kind)
128 # ----------------- done included file, check C basic types --------
130 # Lacking an uintptr_t? Test size of void *
131 case "$acx_cv_header_stdint:$ac_cv_type_uintptr_t" in
132 stddef.h:* | *:no) AC_CHECK_SIZEOF(void *) ;;
135 # Lacking an uint64_t? Test size of long
136 case "$acx_cv_header_stdint:$ac_cv_type_uint64_t:$ac_cv_type_u_int64_t" in
137 stddef.h:*:* | *:no:no) AC_CHECK_SIZEOF(long) ;;
140 if test $acx_cv_header_stdint = stddef.h; then
141 # Lacking a good header? Test size of everything and deduce all types.
143 AC_CHECK_SIZEOF(short)
144 AC_CHECK_SIZEOF(char)
146 AC_MSG_CHECKING(for type equivalent to int8_t)
147 case "$ac_cv_sizeof_char" in
148 1) acx_cv_type_int8_t=char ;;
149 *) AC_MSG_ERROR([no 8-bit type, please report a bug])
151 AC_MSG_RESULT($acx_cv_type_int8_t)
153 AC_MSG_CHECKING(for type equivalent to int16_t)
154 case "$ac_cv_sizeof_int:$ac_cv_sizeof_short" in
155 2:*) acx_cv_type_int16_t=int ;;
156 *:2) acx_cv_type_int16_t=short ;;
157 *) AC_MSG_ERROR([no 16-bit type, please report a bug])
159 AC_MSG_RESULT($acx_cv_type_int16_t)
161 AC_MSG_CHECKING(for type equivalent to int32_t)
162 case "$ac_cv_sizeof_int:$ac_cv_sizeof_long" in
163 4:*) acx_cv_type_int32_t=int ;;
164 *:4) acx_cv_type_int32_t=long ;;
165 *) AC_MSG_ERROR([no 32-bit type, please report a bug])
167 AC_MSG_RESULT($acx_cv_type_int32_t)
170 # These tests are here to make the output prettier
172 if test "$ac_cv_type_uint64_t" != yes && test "$ac_cv_type_u_int64_t" != yes; then
173 case "$ac_cv_sizeof_long" in
174 8) acx_cv_type_int64_t=long ;;
176 AC_MSG_CHECKING(for type equivalent to int64_t)
177 AC_MSG_RESULT(${acx_cv_type_int64_t-'using preprocessor symbols'})
180 # Now we can use the above types
182 if test "$ac_cv_type_uintptr_t" != yes; then
183 AC_MSG_CHECKING(for type equivalent to intptr_t)
184 case $ac_cv_sizeof_void_p in
185 2) acx_cv_type_intptr_t=int16_t ;;
186 4) acx_cv_type_intptr_t=int32_t ;;
187 8) acx_cv_type_intptr_t=int64_t ;;
188 *) AC_MSG_ERROR([no equivalent for intptr_t, please report a bug])
190 AC_MSG_RESULT($acx_cv_type_intptr_t)
193 # ----------------- done all checks, emit header -------------
194 AC_CONFIG_COMMANDS(_GCC_STDINT_H, [
195 if test "$GCC" = yes; then
196 echo "/* generated for " `$CC --version | sed 1q` "*/" > tmp-stdint.h
198 echo "/* generated for $CC */" > tmp-stdint.h
201 sed 's/^ *//' >> tmp-stdint.h <<EOF
203 #ifndef GCC_GENERATED_STDINT_H
204 #define GCC_GENERATED_STDINT_H 1
206 #include <sys/types.h>
209 if test "$acx_cv_header_stdint" != stdint.h; then
210 echo "#include <stddef.h>" >> tmp-stdint.h
212 if test "$acx_cv_header_stdint" != stddef.h; then
213 echo "#include <$acx_cv_header_stdint>" >> tmp-stdint.h
216 sed 's/^ *//' >> tmp-stdint.h <<EOF
217 /* glibc uses these symbols as guards to prevent redefinitions. */
218 #ifdef __int8_t_defined
223 #ifdef __uint32_t_defined
229 # ----------------- done header, emit basic int types -------------
230 if test "$acx_cv_header_stdint" = stddef.h; then
231 sed 's/^ *//' >> tmp-stdint.h <<EOF
235 #ifndef __uint8_t_defined
236 #define __uint8_t_defined
238 typedef unsigned $acx_cv_type_int8_t uint8_t;
245 #ifndef __uint16_t_defined
246 #define __uint16_t_defined
248 typedef unsigned $acx_cv_type_int16_t uint16_t;
255 #ifndef __uint32_t_defined
256 #define __uint32_t_defined
258 typedef unsigned $acx_cv_type_int32_t uint32_t;
265 #ifndef __int8_t_defined
266 #define __int8_t_defined
268 typedef $acx_cv_type_int8_t int8_t;
275 #ifndef __int16_t_defined
276 #define __int16_t_defined
278 typedef $acx_cv_type_int16_t int16_t;
285 #ifndef __int32_t_defined
286 #define __int32_t_defined
288 typedef $acx_cv_type_int32_t int32_t;
293 elif test "$ac_cv_type_u_int32_t" = yes; then
294 sed 's/^ *//' >> tmp-stdint.h <<EOF
296 /* int8_t int16_t int32_t defined by inet code, we do the u_intXX types */
309 #ifndef __uint8_t_defined
310 #define __uint8_t_defined
312 typedef u_int8_t uint8_t;
319 #ifndef __uint16_t_defined
320 #define __uint16_t_defined
322 typedef u_int16_t uint16_t;
329 #ifndef __uint32_t_defined
330 #define __uint32_t_defined
332 typedef u_int32_t uint32_t;
338 sed 's/^ *//' >> tmp-stdint.h <<EOF
340 /* Some systems have guard macros to prevent redefinitions, define them. */
362 # ------------- done basic int types, emit int64_t types ------------
363 if test "$ac_cv_type_uint64_t" = yes; then
364 sed 's/^ *//' >> tmp-stdint.h <<EOF
366 /* system headers have good uint64_t and int64_t */
374 elif test "$ac_cv_type_u_int64_t" = yes; then
375 sed 's/^ *//' >> tmp-stdint.h <<EOF
377 /* system headers have an u_int64_t (and int64_t) */
383 #ifndef __uint64_t_defined
384 #define __uint64_t_defined
386 typedef u_int64_t uint64_t;
391 elif test -n "$acx_cv_type_int64_t"; then
392 sed 's/^ *//' >> tmp-stdint.h <<EOF
394 /* architecture has a 64-bit type, $acx_cv_type_int64_t */
398 typedef $acx_cv_type_int64_t int64_t;
403 #ifndef __uint64_t_defined
404 #define __uint64_t_defined
406 typedef unsigned $acx_cv_type_int64_t uint64_t;
412 sed 's/^ *//' >> tmp-stdint.h <<EOF
414 /* some common heuristics for int64_t, using compiler-specific tests */
415 #if defined __STDC_VERSION__ && (__STDC_VERSION__-0) >= 199901L
418 #ifndef __int64_t_defined
420 typedef long long int64_t;
427 typedef unsigned long long uint64_t;
431 #elif defined __GNUC__ && defined (__STDC__) && __STDC__-0
432 /* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and
433 does not implement __extension__. But that compiler doesn't define
435 # if __GNUC__ < 2 || (__NeXT__ && !__GNUC_MINOR__)
436 # define __extension__
442 __extension__ typedef long long int64_t;
448 __extension__ typedef unsigned long long uint64_t;
452 #elif !defined __STRICT_ANSI__
453 # if defined _MSC_VER || defined __WATCOMC__ || defined __BORLANDC__
458 typedef __int64 int64_t;
464 typedef unsigned __int64 uint64_t;
467 # endif /* compiler */
469 #endif /* ANSI version */
473 # ------------- done int64_t types, emit intptr types ------------
474 if test "$ac_cv_type_uintptr_t" != yes; then
475 sed 's/^ *//' >> tmp-stdint.h <<EOF
477 /* Define intptr_t based on sizeof(void*) = $ac_cv_sizeof_void_p */
478 #ifndef __uintptr_t_defined
480 typedef u$acx_cv_type_intptr_t uintptr_t;
483 #ifndef __intptr_t_defined
485 typedef $acx_cv_type_intptr_t intptr_t;
491 # ------------- done intptr types, emit int_least types ------------
492 if test "$ac_cv_type_int_least32_t" != yes; then
493 sed 's/^ *//' >> tmp-stdint.h <<EOF
495 /* Define int_least types */
496 typedef int8_t int_least8_t;
497 typedef int16_t int_least16_t;
498 typedef int32_t int_least32_t;
500 typedef int64_t int_least64_t;
503 typedef uint8_t uint_least8_t;
504 typedef uint16_t uint_least16_t;
505 typedef uint32_t uint_least32_t;
507 typedef uint64_t uint_least64_t;
512 # ------------- done intptr types, emit int_fast types ------------
513 if test "$ac_cv_type_int_fast32_t" != yes; then
514 dnl NOTE: The following code assumes that sizeof (int) > 1.
515 dnl Fix when strange machines are reported.
516 sed 's/^ *//' >> tmp-stdint.h <<EOF
518 /* Define int_fast types. short is often slow */
519 typedef int8_t int_fast8_t;
520 typedef int int_fast16_t;
521 typedef int32_t int_fast32_t;
523 typedef int64_t int_fast64_t;
526 typedef uint8_t uint_fast8_t;
527 typedef unsigned int uint_fast16_t;
528 typedef uint32_t uint_fast32_t;
530 typedef uint64_t uint_fast64_t;
535 if test "$ac_cv_type_uintmax_t" != yes; then
536 sed 's/^ *//' >> tmp-stdint.h <<EOF
538 /* Define intmax based on what we found */
541 typedef int64_t intmax_t;
543 typedef long intmax_t;
548 typedef uint64_t uintmax_t;
550 typedef unsigned long uintmax_t;
556 sed 's/^ *//' >> tmp-stdint.h <<EOF
558 #endif /* GCC_GENERATED_STDINT_H */
561 if test -r ]_GCC_STDINT_H[ && cmp -s tmp-stdint.h ]_GCC_STDINT_H[; then
564 mv -f tmp-stdint.h ]_GCC_STDINT_H[
570 acx_cv_header_stdint="$acx_cv_header_stdint"
571 acx_cv_type_int8_t="$acx_cv_type_int8_t"
572 acx_cv_type_int16_t="$acx_cv_type_int16_t"
573 acx_cv_type_int32_t="$acx_cv_type_int32_t"
574 acx_cv_type_int64_t="$acx_cv_type_int64_t"
575 acx_cv_type_intptr_t="$acx_cv_type_intptr_t"
576 ac_cv_type_uintmax_t="$ac_cv_type_uintmax_t"
577 ac_cv_type_uintptr_t="$ac_cv_type_uintptr_t"
578 ac_cv_type_uint64_t="$ac_cv_type_uint64_t"
579 ac_cv_type_u_int64_t="$ac_cv_type_u_int64_t"
580 ac_cv_type_u_int32_t="$ac_cv_type_u_int32_t"
581 ac_cv_type_int_least32_t="$ac_cv_type_int_least32_t"
582 ac_cv_type_int_fast32_t="$ac_cv_type_int_fast32_t"
583 ac_cv_sizeof_void_p="$ac_cv_sizeof_void_p"