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1# inttypes.m4 serial 26
2dnl Copyright (C) 2006-2012 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Derek Price, Bruno Haible.
8dnl Test whether <inttypes.h> is supported or must be substituted.
9
10AC_DEFUN([gl_INTTYPES_H],
11[
12  AC_REQUIRE([gl_INTTYPES_INCOMPLETE])
13  gl_INTTYPES_PRI_SCN
14])
15
16AC_DEFUN_ONCE([gl_INTTYPES_INCOMPLETE],
17[
18  AC_REQUIRE([gl_STDINT_H])
19  AC_CHECK_HEADERS_ONCE([inttypes.h])
20
21  dnl Override <inttypes.h> always, so that the portability warnings work.
22  AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
23  gl_CHECK_NEXT_HEADERS([inttypes.h])
24
25  AC_REQUIRE([gl_MULTIARCH])
26
27  dnl Check for declarations of anything we want to poison if the
28  dnl corresponding gnulib module is not in use.
29  gl_WARN_ON_USE_PREPARE([[#include <inttypes.h>
30    ]], [imaxabs imaxdiv strtoimax strtoumax])
31])
32
33# Ensure that the PRI* and SCN* macros are defined appropriately.
34AC_DEFUN([gl_INTTYPES_PRI_SCN],
35[
36  AC_REQUIRE([gt_INTTYPES_PRI])
37
38  PRIPTR_PREFIX=
39  if test -n "$STDINT_H"; then
40    dnl Using the gnulib <stdint.h>. It always defines intptr_t to 'long'.
41    PRIPTR_PREFIX='"l"'
42  else
43    dnl Using the system's <stdint.h>.
44    for glpfx in '' l ll I64; do
45      case $glpfx in
46        '')  gltype1='int';;
47        l)   gltype1='long int';;
48        ll)  gltype1='long long int';;
49        I64) gltype1='__int64';;
50      esac
51      AC_COMPILE_IFELSE(
52        [AC_LANG_PROGRAM([[#include <stdint.h>
53           extern intptr_t foo;
54           extern $gltype1 foo;]])],
55        [PRIPTR_PREFIX='"'$glpfx'"'])
56      test -n "$PRIPTR_PREFIX" && break
57    done
58  fi
59  AC_SUBST([PRIPTR_PREFIX])
60
61  gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
62    [INT32_MAX_LT_INTMAX_MAX],
63    [defined INT32_MAX && defined INTMAX_MAX],
64    [INT32_MAX < INTMAX_MAX],
65    [sizeof (int) < sizeof (long long int)])
66  if test $APPLE_UNIVERSAL_BUILD = 0; then
67    gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
68      [INT64_MAX_EQ_LONG_MAX],
69      [defined INT64_MAX],
70      [INT64_MAX == LONG_MAX],
71      [sizeof (long long int) == sizeof (long int)])
72  else
73    INT64_MAX_EQ_LONG_MAX=-1
74  fi
75  gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
76    [UINT32_MAX_LT_UINTMAX_MAX],
77    [defined UINT32_MAX && defined UINTMAX_MAX],
78    [UINT32_MAX < UINTMAX_MAX],
79    [sizeof (unsigned int) < sizeof (unsigned long long int)])
80  if test $APPLE_UNIVERSAL_BUILD = 0; then
81    gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
82      [UINT64_MAX_EQ_ULONG_MAX],
83      [defined UINT64_MAX],
84      [UINT64_MAX == ULONG_MAX],
85      [sizeof (unsigned long long int) == sizeof (unsigned long int)])
86  else
87    UINT64_MAX_EQ_ULONG_MAX=-1
88  fi
89])
90
91# Define the symbol $1 to be 1 if the condition is true, 0 otherwise.
92# If $2 is true, the condition is $3; otherwise if long long int is supported
93# approximate the condition with $4; otherwise, assume the condition is false.
94# The condition should work on all C99 platforms; the approximations should be
95# good enough to work on all practical pre-C99 platforms.
96# $2 is evaluated by the C preprocessor, $3 and $4 as compile-time constants.
97AC_DEFUN([gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION],
98[
99  AC_CACHE_CHECK([whether $3],
100    [gl_cv_test_$1],
101    [AC_COMPILE_IFELSE(
102       [AC_LANG_PROGRAM(
103          [[/* Work also in C++ mode.  */
104            #define __STDC_LIMIT_MACROS 1
105
106            /* Work if build is not clean.  */
107            #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H
108
109            #include <limits.h>
110            #if HAVE_STDINT_H
111             #include <stdint.h>
112            #endif
113
114            #if $2
115             #define CONDITION ($3)
116            #elif HAVE_LONG_LONG_INT
117             #define CONDITION ($4)
118            #else
119             #define CONDITION 0
120            #endif
121            int test[CONDITION ? 1 : -1];]])],
122       [gl_cv_test_$1=yes],
123       [gl_cv_test_$1=no])])
124  if test $gl_cv_test_$1 = yes; then
125    $1=1;
126  else
127    $1=0;
128  fi
129  AC_SUBST([$1])
130])
131
132AC_DEFUN([gl_INTTYPES_MODULE_INDICATOR],
133[
134  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
135  AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
136  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
137])
138
139AC_DEFUN([gl_INTTYPES_H_DEFAULTS],
140[
141  GNULIB_IMAXABS=0;      AC_SUBST([GNULIB_IMAXABS])
142  GNULIB_IMAXDIV=0;      AC_SUBST([GNULIB_IMAXDIV])
143  GNULIB_STRTOIMAX=0;    AC_SUBST([GNULIB_STRTOIMAX])
144  GNULIB_STRTOUMAX=0;    AC_SUBST([GNULIB_STRTOUMAX])
145  dnl Assume proper GNU behavior unless another module says otherwise.
146  HAVE_DECL_IMAXABS=1;   AC_SUBST([HAVE_DECL_IMAXABS])
147  HAVE_DECL_IMAXDIV=1;   AC_SUBST([HAVE_DECL_IMAXDIV])
148  HAVE_DECL_STRTOIMAX=1; AC_SUBST([HAVE_DECL_STRTOIMAX])
149  HAVE_DECL_STRTOUMAX=1; AC_SUBST([HAVE_DECL_STRTOUMAX])
150  REPLACE_STRTOIMAX=0;   AC_SUBST([REPLACE_STRTOIMAX])
151  INT32_MAX_LT_INTMAX_MAX=1;  AC_SUBST([INT32_MAX_LT_INTMAX_MAX])
152  INT64_MAX_EQ_LONG_MAX='defined _LP64';  AC_SUBST([INT64_MAX_EQ_LONG_MAX])
153  PRI_MACROS_BROKEN=0;   AC_SUBST([PRI_MACROS_BROKEN])
154  PRIPTR_PREFIX=__PRIPTR_PREFIX;  AC_SUBST([PRIPTR_PREFIX])
155  UINT32_MAX_LT_UINTMAX_MAX=1;  AC_SUBST([UINT32_MAX_LT_UINTMAX_MAX])
156  UINT64_MAX_EQ_ULONG_MAX='defined _LP64';  AC_SUBST([UINT64_MAX_EQ_ULONG_MAX])
157])
158