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# inttypes.m4 serial 37
dnl Copyright (C) 2006-2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl From Derek Price, Bruno Haible.
dnl Test whether <inttypes.h> is supported or must be substituted.
AC_DEFUN_ONCE([gl_INTTYPES_H],
[
AC_REQUIRE([gl_INTTYPES_INCOMPLETE])
gl_INTTYPES_PRI_SCN
])
AC_DEFUN_ONCE([gl_INTTYPES_INCOMPLETE],
[
AC_REQUIRE([gl_STDINT_H])
AC_CHECK_HEADERS_ONCE([inttypes.h])
dnl Override <inttypes.h> always, so that the portability warnings work.
AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
gl_CHECK_NEXT_HEADERS([inttypes.h])
AC_REQUIRE([gl_MULTIARCH])
dnl Check for declarations of anything we want to poison if the
dnl corresponding gnulib module is not in use.
gl_WARN_ON_USE_PREPARE([[#include <inttypes.h>
]], [imaxabs imaxdiv strtoimax strtoumax])
AC_REQUIRE([AC_C_RESTRICT])
])
# Ensure that the PRI* and SCN* macros are defined appropriately.
AC_DEFUN([gl_INTTYPES_PRI_SCN],
[
PRIPTR_PREFIX=
if $GL_GENERATE_STDINT_H; then
dnl Using the gnulib <stdint.h>. It defines intptr_t to 'long' or
dnl 'long long', depending on _WIN64.
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[
#ifdef _WIN64
LLP64
#endif
]])
],
[PRIPTR_PREFIX='"l"'],
[PRIPTR_PREFIX='"ll"'])
else
dnl Using the system's <stdint.h>.
for glpfx in '' l ll I64; do
case $glpfx in
'') gltype1='int';;
l) gltype1='long int';;
ll) gltype1='long long int';;
I64) gltype1='__int64';;
esac
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[#include <stdint.h>
extern intptr_t foo;
extern $gltype1 foo;]])],
[PRIPTR_PREFIX='"'$glpfx'"'])
test -n "$PRIPTR_PREFIX" && break
done
fi
AC_SUBST([PRIPTR_PREFIX])
gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
[INT32_MAX_LT_INTMAX_MAX],
[defined INT32_MAX && defined INTMAX_MAX],
[INT32_MAX < INTMAX_MAX],
[sizeof (int) < sizeof (long long int)])
if test $APPLE_UNIVERSAL_BUILD = 0; then
gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
[INT64_MAX_EQ_LONG_MAX],
[defined INT64_MAX],
[INT64_MAX == LONG_MAX],
[sizeof (long long int) == sizeof (long int)])
else
INT64_MAX_EQ_LONG_MAX=-1
fi
gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
[UINT32_MAX_LT_UINTMAX_MAX],
[defined UINT32_MAX && defined UINTMAX_MAX],
[UINT32_MAX < UINTMAX_MAX],
[sizeof (unsigned int) < sizeof (unsigned long long int)])
if test $APPLE_UNIVERSAL_BUILD = 0; then
gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(
[UINT64_MAX_EQ_ULONG_MAX],
[defined UINT64_MAX],
[UINT64_MAX == ULONG_MAX],
[sizeof (unsigned long long int) == sizeof (unsigned long int)])
else
UINT64_MAX_EQ_ULONG_MAX=-1
fi
])
# Define the symbol $1 to be 1 if the condition is true, 0 otherwise.
# If $2 is true, the condition is $3; otherwise if long long int is supported
# approximate the condition with $4; otherwise, assume the condition is false.
# The condition should work on all C99 platforms; the approximations should be
# good enough to work on all practical pre-C99 platforms.
# $2 is evaluated by the C preprocessor, $3 and $4 as compile-time constants.
AC_DEFUN([gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION],
[
AC_CACHE_CHECK([whether $3],
[gl_cv_test_$1],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[[/* Work also in C++ mode. */
#define __STDC_LIMIT_MACROS 1
/* Work if build is not clean. */
#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H
#include <limits.h>
#if HAVE_STDINT_H
#include <stdint.h>
#endif
#if $2
#define CONDITION ($3)
#else
#define CONDITION ($4)
#endif
int test[CONDITION ? 1 : -1];]])],
[gl_cv_test_$1=yes],
[gl_cv_test_$1=no])])
if test $gl_cv_test_$1 = yes; then
$1=1;
else
$1=0;
fi
AC_SUBST([$1])
])
# gl_INTTYPES_MODULE_INDICATOR([modulename])
# sets the shell variable that indicates the presence of the given module
# to a C preprocessor expression that will evaluate to 1.
# This macro invocation must not occur in macros that are AC_REQUIREd.
AC_DEFUN([gl_INTTYPES_MODULE_INDICATOR],
[
dnl Ensure to expand the default settings once only.
gl_INTTYPES_H_REQUIRE_DEFAULTS
gl_MODULE_INDICATOR_SET_VARIABLE([$1])
])
# Initializes the default values for AC_SUBSTed shell variables.
# This macro must not be AC_REQUIREd. It must only be invoked, and only
# outside of macros or in macros that are not AC_REQUIREd.
AC_DEFUN([gl_INTTYPES_H_REQUIRE_DEFAULTS],
[
m4_defun(GL_MODULE_INDICATOR_PREFIX[_INTTYPES_H_MODULE_INDICATOR_DEFAULTS], [
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_IMAXABS])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_IMAXDIV])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOIMAX])
gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_STRTOUMAX])
])
m4_require(GL_MODULE_INDICATOR_PREFIX[_INTTYPES_H_MODULE_INDICATOR_DEFAULTS])
AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])
])
AC_DEFUN([gl_INTTYPES_H_DEFAULTS],
[
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_DECL_IMAXABS=1; AC_SUBST([HAVE_DECL_IMAXABS])
HAVE_DECL_IMAXDIV=1; AC_SUBST([HAVE_DECL_IMAXDIV])
HAVE_DECL_STRTOIMAX=1; AC_SUBST([HAVE_DECL_STRTOIMAX])
HAVE_DECL_STRTOUMAX=1; AC_SUBST([HAVE_DECL_STRTOUMAX])
HAVE_IMAXDIV_T=1; AC_SUBST([HAVE_IMAXDIV_T])
HAVE_IMAXABS=1; AC_SUBST([HAVE_IMAXABS])
HAVE_IMAXDIV=1; AC_SUBST([HAVE_IMAXDIV])
REPLACE_IMAXABS=0; AC_SUBST([REPLACE_IMAXABS])
REPLACE_IMAXDIV=0; AC_SUBST([REPLACE_IMAXDIV])
REPLACE_STRTOIMAX=0; AC_SUBST([REPLACE_STRTOIMAX])
REPLACE_STRTOUMAX=0; AC_SUBST([REPLACE_STRTOUMAX])
INT32_MAX_LT_INTMAX_MAX=1; AC_SUBST([INT32_MAX_LT_INTMAX_MAX])
INT64_MAX_EQ_LONG_MAX='defined _LP64'; AC_SUBST([INT64_MAX_EQ_LONG_MAX])
PRIPTR_PREFIX=__PRIPTR_PREFIX; AC_SUBST([PRIPTR_PREFIX])
UINT32_MAX_LT_UINTMAX_MAX=1; AC_SUBST([UINT32_MAX_LT_UINTMAX_MAX])
UINT64_MAX_EQ_ULONG_MAX='defined _LP64'; AC_SUBST([UINT64_MAX_EQ_ULONG_MAX])
])
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