source: trunk/libs/newlib/src/config/stdint.m4 @ 581

Last change on this file since 581 was 444, checked in by satin@…, 7 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
File size: 16.3 KB
Line 
1AC_DEFUN([GCC_STDINT_TYPES],
2[AC_REQUIRE([AC_TYPE_INT8_T])
3AC_REQUIRE([AC_TYPE_INT16_T])
4AC_REQUIRE([AC_TYPE_INT32_T])
5AC_REQUIRE([AC_TYPE_INT64_T])
6AC_REQUIRE([AC_TYPE_INTMAX_T])
7AC_REQUIRE([AC_TYPE_INTPTR_T])
8AC_REQUIRE([AC_TYPE_UINT8_T])
9AC_REQUIRE([AC_TYPE_UINT16_T])
10AC_REQUIRE([AC_TYPE_UINT32_T])
11AC_REQUIRE([AC_TYPE_UINT64_T])
12AC_REQUIRE([AC_TYPE_UINTMAX_T])
13AC_REQUIRE([AC_TYPE_UINTPTR_T])])
14
15dnl @synopsis GCC_HEADER_STDINT [( HEADER-TO-GENERATE [, HEADERS-TO-CHECK])]
16dnl
17dnl the "ISO C9X: 7.18 Integer types <stdint.h>" section requires the
18dnl existence of an include file <stdint.h> that defines a set of
19dnl typedefs, especially uint8_t,int32_t,uintptr_t.
20dnl Many older installations will not provide this file, but some will
21dnl have the very same definitions in <inttypes.h>. In other environments
22dnl we can use the inet-types in <sys/types.h> which would define the
23dnl typedefs int8_t and u_int8_t respectivly.
24dnl
25dnl This macros will create a local "_stdint.h" or the headerfile given as
26dnl an argument. In many cases that file will pick the definition from a
27dnl "#include <stdint.h>" or "#include <inttypes.h>" statement, while
28dnl in other environments it will provide the set of basic 'stdint's defined:
29dnl int8_t,uint8_t,int16_t,uint16_t,int32_t,uint32_t,intptr_t,uintptr_t
30dnl int_least32_t.. int_fast32_t.. intmax_t
31dnl which may or may not rely on the definitions of other files.
32dnl
33dnl Sometimes the stdint.h or inttypes.h headers conflict with sys/types.h,
34dnl so we test the headers together with sys/types.h and always include it
35dnl into the generated header (to match the tests with the generated file).
36dnl Hopefully this is not a big annoyance.
37dnl
38dnl If your installed header files require the stdint-types you will want to
39dnl create an installable file mylib-int.h that all your other installable
40dnl header may include. So, for a library package named "mylib", just use
41dnl      GCC_HEADER_STDINT(mylib-int.h)
42dnl in configure.ac and install that header file in Makefile.am along with
43dnl the other headers (mylib.h).  The mylib-specific headers can simply
44dnl use "#include <mylib-int.h>" to obtain the stdint-types.
45dnl
46dnl Remember, if the system already had a valid <stdint.h>, the generated
47dnl file will include it directly. No need for fuzzy HAVE_STDINT_H things...
48dnl
49dnl @author  Guido Draheim <guidod@gmx.de>, Paolo Bonzini <bonzini@gnu.org>
50
51AC_DEFUN([GCC_HEADER_STDINT],
52[m4_define(_GCC_STDINT_H, m4_ifval($1, $1, _stdint.h))
53
54inttype_headers=`echo inttypes.h sys/inttypes.h $2 | sed -e 's/,/ /g'`
55
56acx_cv_header_stdint=stddef.h
57acx_cv_header_stdint_kind="(already complete)"
58for 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>
66#include <$i>])
67  AC_CHECK_TYPE(uintptr_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h>
68#include <$i>])
69  AC_CHECK_TYPE(int_least32_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h>
70#include <$i>])
71  AC_CHECK_TYPE(int_fast32_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h>
72#include <$i>])
73  AC_CHECK_TYPE(uint64_t,,[acx_cv_header_stdint_kind="(lacks uint64_t)"], [#include <sys/types.h>
74#include <$i>])
75  break
76done
77if test "$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>
85#include <$i>])
86    AC_CHECK_TYPE(uint64_t,,,[#include <sys/types.h>
87#include <$i>])
88    AC_CHECK_TYPE(uintptr_t,,,[#include <sys/types.h>
89#include <$i>])
90    break
91  done
92fi
93if test "$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>
100#include <$i>])
101    AC_CHECK_TYPE(u_int64_t,,,[#include <sys/types.h>
102#include <$i>])
103    break
104  done
105fi
106if test "$acx_cv_header_stdint" = stddef.h; then
107  acx_cv_header_stdint_kind="(using manual detection)"
108fi
109
110test -z "$ac_cv_type_uintptr_t" && ac_cv_type_uintptr_t=no
111test -z "$ac_cv_type_uint64_t" && ac_cv_type_uint64_t=no
112test -z "$ac_cv_type_u_int64_t" && ac_cv_type_u_int64_t=no
113test -z "$ac_cv_type_int_least32_t" && ac_cv_type_int_least32_t=no
114test -z "$ac_cv_type_int_fast32_t" && ac_cv_type_int_fast32_t=no
115
116# ----------------- Summarize what we found so far
117
118AC_MSG_CHECKING([what to include in _GCC_STDINT_H])
119
120case `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?]) ;;
123  *) ;;
124esac
125
126AC_MSG_RESULT($acx_cv_header_stdint $acx_cv_header_stdint_kind)
127
128# ----------------- done included file, check C basic types --------
129
130# Lacking an uintptr_t?  Test size of void *
131case "$acx_cv_header_stdint:$ac_cv_type_uintptr_t" in
132  stddef.h:* | *:no) AC_CHECK_SIZEOF(void *) ;;
133esac
134
135# Lacking an uint64_t?  Test size of long
136case "$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) ;;
138esac
139
140if test $acx_cv_header_stdint = stddef.h; then
141  # Lacking a good header?  Test size of everything and deduce all types.
142  AC_CHECK_SIZEOF(int)
143  AC_CHECK_SIZEOF(short)
144  AC_CHECK_SIZEOF(char)
145
146  AC_MSG_CHECKING(for type equivalent to int8_t)
147  case "$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])
150  esac
151  AC_MSG_RESULT($acx_cv_type_int8_t)
152
153  AC_MSG_CHECKING(for type equivalent to int16_t)
154  case "$ac_cv_sizeof_int:$ac_cv_sizeof_short" in
155    2:*) acx_cv_type_int16_t=int ;;
156    *:2) acx_cv_type_int16_t=short ;;
157    *) AC_MSG_ERROR([no 16-bit type, please report a bug])
158  esac
159  AC_MSG_RESULT($acx_cv_type_int16_t)
160
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])
166  esac
167  AC_MSG_RESULT($acx_cv_type_int32_t)
168fi
169
170# These tests are here to make the output prettier
171
172if test "$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 ;;
175  esac
176  AC_MSG_CHECKING(for type equivalent to int64_t)
177  AC_MSG_RESULT(${acx_cv_type_int64_t-'using preprocessor symbols'})
178fi
179
180# Now we can use the above types
181
182if test "$ac_cv_type_uintptr_t" != yes; then
183  AC_MSG_CHECKING(for type equivalent to intptr_t)
184  case $ac_cv_sizeof_void_p in
185    2) acx_cv_type_intptr_t=int16_t ;;
186    4) acx_cv_type_intptr_t=int32_t ;;
187    8) acx_cv_type_intptr_t=int64_t ;;
188    *) AC_MSG_ERROR([no equivalent for intptr_t, please report a bug])
189  esac
190  AC_MSG_RESULT($acx_cv_type_intptr_t)
191fi
192
193# ----------------- done all checks, emit header -------------
194AC_CONFIG_COMMANDS(_GCC_STDINT_H, [
195if test "$GCC" = yes; then
196  echo "/* generated for " `$CC --version | sed 1q` "*/" > tmp-stdint.h
197else
198  echo "/* generated for $CC */" > tmp-stdint.h
199fi
200
201sed 's/^ *//' >> tmp-stdint.h <<EOF
202
203  #ifndef GCC_GENERATED_STDINT_H
204  #define GCC_GENERATED_STDINT_H 1
205
206  #include <sys/types.h>
207EOF
208
209if test "$acx_cv_header_stdint" != stdint.h; then
210  echo "#include <stddef.h>" >> tmp-stdint.h
211fi
212if test "$acx_cv_header_stdint" != stddef.h; then
213  echo "#include <$acx_cv_header_stdint>" >> tmp-stdint.h
214fi
215
216sed 's/^ *//' >> tmp-stdint.h <<EOF
217  /* glibc uses these symbols as guards to prevent redefinitions.  */
218  #ifdef __int8_t_defined
219  #define _INT8_T
220  #define _INT16_T
221  #define _INT32_T
222  #endif
223  #ifdef __uint32_t_defined
224  #define _UINT32_T
225  #endif
226
227EOF
228
229# ----------------- done header, emit basic int types -------------
230if test "$acx_cv_header_stdint" = stddef.h; then
231  sed 's/^ *//' >> tmp-stdint.h <<EOF
232
233    #ifndef _UINT8_T
234    #define _UINT8_T
235    #ifndef __uint8_t_defined
236    #define __uint8_t_defined
237    #ifndef uint8_t
238    typedef unsigned $acx_cv_type_int8_t uint8_t;
239    #endif
240    #endif
241    #endif
242
243    #ifndef _UINT16_T
244    #define _UINT16_T
245    #ifndef __uint16_t_defined
246    #define __uint16_t_defined
247    #ifndef uint16_t
248    typedef unsigned $acx_cv_type_int16_t uint16_t;
249    #endif
250    #endif
251    #endif
252
253    #ifndef _UINT32_T
254    #define _UINT32_T
255    #ifndef __uint32_t_defined
256    #define __uint32_t_defined
257    #ifndef uint32_t
258    typedef unsigned $acx_cv_type_int32_t uint32_t;
259    #endif
260    #endif
261    #endif
262
263    #ifndef _INT8_T
264    #define _INT8_T
265    #ifndef __int8_t_defined
266    #define __int8_t_defined
267    #ifndef int8_t
268    typedef $acx_cv_type_int8_t int8_t;
269    #endif
270    #endif
271    #endif
272
273    #ifndef _INT16_T
274    #define _INT16_T
275    #ifndef __int16_t_defined
276    #define __int16_t_defined
277    #ifndef int16_t
278    typedef $acx_cv_type_int16_t int16_t;
279    #endif
280    #endif
281    #endif
282
283    #ifndef _INT32_T
284    #define _INT32_T
285    #ifndef __int32_t_defined
286    #define __int32_t_defined
287    #ifndef int32_t
288    typedef $acx_cv_type_int32_t int32_t;
289    #endif
290    #endif
291    #endif
292EOF
293elif test "$ac_cv_type_u_int32_t" = yes; then
294  sed 's/^ *//' >> tmp-stdint.h <<EOF
295
296    /* int8_t int16_t int32_t defined by inet code, we do the u_intXX types */
297    #ifndef _INT8_T
298    #define _INT8_T
299    #endif
300    #ifndef _INT16_T
301    #define _INT16_T
302    #endif
303    #ifndef _INT32_T
304    #define _INT32_T
305    #endif
306
307    #ifndef _UINT8_T
308    #define _UINT8_T
309    #ifndef __uint8_t_defined
310    #define __uint8_t_defined
311    #ifndef uint8_t
312    typedef u_int8_t uint8_t;
313    #endif
314    #endif
315    #endif
316
317    #ifndef _UINT16_T
318    #define _UINT16_T
319    #ifndef __uint16_t_defined
320    #define __uint16_t_defined
321    #ifndef uint16_t
322    typedef u_int16_t uint16_t;
323    #endif
324    #endif
325    #endif
326
327    #ifndef _UINT32_T
328    #define _UINT32_T
329    #ifndef __uint32_t_defined
330    #define __uint32_t_defined
331    #ifndef uint32_t
332    typedef u_int32_t uint32_t;
333    #endif
334    #endif
335    #endif
336EOF
337else
338  sed 's/^ *//' >> tmp-stdint.h <<EOF
339
340    /* Some systems have guard macros to prevent redefinitions, define them.  */
341    #ifndef _INT8_T
342    #define _INT8_T
343    #endif
344    #ifndef _INT16_T
345    #define _INT16_T
346    #endif
347    #ifndef _INT32_T
348    #define _INT32_T
349    #endif
350    #ifndef _UINT8_T
351    #define _UINT8_T
352    #endif
353    #ifndef _UINT16_T
354    #define _UINT16_T
355    #endif
356    #ifndef _UINT32_T
357    #define _UINT32_T
358    #endif
359EOF
360fi
361
362# ------------- done basic int types, emit int64_t types ------------
363if test "$ac_cv_type_uint64_t" = yes; then
364  sed 's/^ *//' >> tmp-stdint.h <<EOF
365
366    /* system headers have good uint64_t and int64_t */
367    #ifndef _INT64_T
368    #define _INT64_T
369    #endif
370    #ifndef _UINT64_T
371    #define _UINT64_T
372    #endif
373EOF
374elif test "$ac_cv_type_u_int64_t" = yes; then
375  sed 's/^ *//' >> tmp-stdint.h <<EOF
376
377    /* system headers have an u_int64_t (and int64_t) */
378    #ifndef _INT64_T
379    #define _INT64_T
380    #endif
381    #ifndef _UINT64_T
382    #define _UINT64_T
383    #ifndef __uint64_t_defined
384    #define __uint64_t_defined
385    #ifndef uint64_t
386    typedef u_int64_t uint64_t;
387    #endif
388    #endif
389    #endif
390EOF
391elif test -n "$acx_cv_type_int64_t"; then
392  sed 's/^ *//' >> tmp-stdint.h <<EOF
393
394    /* architecture has a 64-bit type, $acx_cv_type_int64_t */
395    #ifndef _INT64_T
396    #define _INT64_T
397    #ifndef int64_t
398    typedef $acx_cv_type_int64_t int64_t;
399    #endif
400    #endif
401    #ifndef _UINT64_T
402    #define _UINT64_T
403    #ifndef __uint64_t_defined
404    #define __uint64_t_defined
405    #ifndef uint64_t
406    typedef unsigned $acx_cv_type_int64_t uint64_t;
407    #endif
408    #endif
409    #endif
410EOF
411else
412  sed 's/^ *//' >> tmp-stdint.h <<EOF
413
414    /* some common heuristics for int64_t, using compiler-specific tests */
415    #if defined __STDC_VERSION__ && (__STDC_VERSION__-0) >= 199901L
416    #ifndef _INT64_T
417    #define _INT64_T
418    #ifndef __int64_t_defined
419    #ifndef int64_t
420    typedef long long int64_t;
421    #endif
422    #endif
423    #endif
424    #ifndef _UINT64_T
425    #define _UINT64_T
426    #ifndef uint64_t
427    typedef unsigned long long uint64_t;
428    #endif
429    #endif
430
431    #elif defined __GNUC__ && defined (__STDC__) && __STDC__-0
432    /* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and
433       does not implement __extension__.  But that compiler doesn't define
434       __GNUC_MINOR__.  */
435    # if __GNUC__ < 2 || (__NeXT__ && !__GNUC_MINOR__)
436    # define __extension__
437    # endif
438
439    # ifndef _INT64_T
440    # define _INT64_T
441    # ifndef int64_t
442    __extension__ typedef long long int64_t;
443    # endif
444    # endif
445    # ifndef _UINT64_T
446    # define _UINT64_T
447    # ifndef uint64_t
448    __extension__ typedef unsigned long long uint64_t;
449    # endif
450    # endif
451
452    #elif !defined __STRICT_ANSI__
453    # if defined _MSC_VER || defined __WATCOMC__ || defined __BORLANDC__
454
455    #  ifndef _INT64_T
456    #  define _INT64_T
457    #  ifndef int64_t
458    typedef __int64 int64_t;
459    #  endif
460    #  endif
461    #  ifndef _UINT64_T
462    #  define _UINT64_T
463    #  ifndef uint64_t
464    typedef unsigned __int64 uint64_t;
465    #  endif
466    #  endif
467    # endif /* compiler */
468
469    #endif /* ANSI version */
470EOF
471fi
472
473# ------------- done int64_t types, emit intptr types ------------
474if test "$ac_cv_type_uintptr_t" != yes; then
475  sed 's/^ *//' >> tmp-stdint.h <<EOF
476
477    /* Define intptr_t based on sizeof(void*) = $ac_cv_sizeof_void_p */
478    #ifndef __uintptr_t_defined
479    #ifndef uintptr_t
480    typedef u$acx_cv_type_intptr_t uintptr_t;
481    #endif
482    #endif
483    #ifndef __intptr_t_defined
484    #ifndef intptr_t
485    typedef $acx_cv_type_intptr_t  intptr_t;
486    #endif
487    #endif
488EOF
489fi
490
491# ------------- done intptr types, emit int_least types ------------
492if test "$ac_cv_type_int_least32_t" != yes; then
493  sed 's/^ *//' >> tmp-stdint.h <<EOF
494
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;
499    #ifdef _INT64_T
500    typedef int64_t    int_least64_t;
501    #endif
502
503    typedef uint8_t    uint_least8_t;
504    typedef uint16_t   uint_least16_t;
505    typedef uint32_t   uint_least32_t;
506    #ifdef _UINT64_T
507    typedef uint64_t   uint_least64_t;
508    #endif
509EOF
510fi
511
512# ------------- done intptr types, emit int_fast types ------------
513if test "$ac_cv_type_int_fast32_t" != yes; then
514  dnl NOTE: The following code assumes that sizeof (int) > 1.
515  dnl Fix when strange machines are reported.
516  sed 's/^ *//' >> tmp-stdint.h <<EOF
517
518    /* Define int_fast types.  short is often slow */
519    typedef int8_t       int_fast8_t;
520    typedef int          int_fast16_t;
521    typedef int32_t      int_fast32_t;
522    #ifdef _INT64_T
523    typedef int64_t      int_fast64_t;
524    #endif
525
526    typedef uint8_t      uint_fast8_t;
527    typedef unsigned int uint_fast16_t;
528    typedef uint32_t     uint_fast32_t;
529    #ifdef _UINT64_T
530    typedef uint64_t     uint_fast64_t;
531    #endif
532EOF
533fi
534
535if test "$ac_cv_type_uintmax_t" != yes; then
536  sed 's/^ *//' >> tmp-stdint.h <<EOF
537
538    /* Define intmax based on what we found */
539    #ifndef intmax_t
540    #ifdef _INT64_T
541    typedef int64_t       intmax_t;
542    #else
543    typedef long          intmax_t;
544    #endif
545    #endif
546    #ifndef uintmax_t
547    #ifdef _UINT64_T
548    typedef uint64_t      uintmax_t;
549    #else
550    typedef unsigned long uintmax_t;
551    #endif
552    #endif
553EOF
554fi
555
556sed 's/^ *//' >> tmp-stdint.h <<EOF
557
558  #endif /* GCC_GENERATED_STDINT_H */
559EOF
560
561if test -r ]_GCC_STDINT_H[ && cmp -s tmp-stdint.h ]_GCC_STDINT_H[; then
562  rm -f tmp-stdint.h
563else
564  mv -f tmp-stdint.h ]_GCC_STDINT_H[
565fi
566
567], [
568GCC="$GCC"
569CC="$CC"
570acx_cv_header_stdint="$acx_cv_header_stdint"
571acx_cv_type_int8_t="$acx_cv_type_int8_t"
572acx_cv_type_int16_t="$acx_cv_type_int16_t"
573acx_cv_type_int32_t="$acx_cv_type_int32_t"
574acx_cv_type_int64_t="$acx_cv_type_int64_t"
575acx_cv_type_intptr_t="$acx_cv_type_intptr_t"
576ac_cv_type_uintmax_t="$ac_cv_type_uintmax_t"
577ac_cv_type_uintptr_t="$ac_cv_type_uintptr_t"
578ac_cv_type_uint64_t="$ac_cv_type_uint64_t"
579ac_cv_type_u_int64_t="$ac_cv_type_u_int64_t"
580ac_cv_type_u_int32_t="$ac_cv_type_u_int32_t"
581ac_cv_type_int_least32_t="$ac_cv_type_int_least32_t"
582ac_cv_type_int_fast32_t="$ac_cv_type_int_fast32_t"
583ac_cv_sizeof_void_p="$ac_cv_sizeof_void_p"
584])
585
586])
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