diff options
Diffstat (limited to 'm4/stdint.m4')
-rw-r--r-- | m4/stdint.m4 | 154 |
1 files changed, 73 insertions, 81 deletions
diff --git a/m4/stdint.m4 b/m4/stdint.m4 index 4ac854d51..a785b44ed 100644 --- a/m4/stdint.m4 +++ b/m4/stdint.m4 @@ -1,5 +1,5 @@ -# stdint.m4 serial 50 -dnl Copyright (C) 2001-2017 Free Software Foundation, Inc. +# stdint.m4 serial 58 +dnl Copyright (C) 2001-2021 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. @@ -7,28 +7,22 @@ dnl with or without modifications, as long as this notice is preserved. dnl From Paul Eggert and Bruno Haible. dnl Test whether <stdint.h> is supported or must be substituted. +AC_PREREQ([2.61]) + AC_DEFUN_ONCE([gl_STDINT_H], [ AC_PREREQ([2.59])dnl + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles AC_REQUIRE([gl_LIMITS_H]) AC_REQUIRE([gt_TYPE_WINT_T]) - dnl Check for long long int and unsigned long long int. - AC_REQUIRE([AC_TYPE_LONG_LONG_INT]) - if test $ac_cv_type_long_long_int = yes; then - HAVE_LONG_LONG_INT=1 - else - HAVE_LONG_LONG_INT=0 - fi - AC_SUBST([HAVE_LONG_LONG_INT]) - AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT]) - if test $ac_cv_type_unsigned_long_long_int = yes; then - HAVE_UNSIGNED_LONG_LONG_INT=1 - else - HAVE_UNSIGNED_LONG_LONG_INT=0 - fi - AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT]) + dnl For backward compatibility. Some packages may still be testing these + dnl macros. + AC_DEFINE([HAVE_LONG_LONG_INT], [1], + [Define to 1 if the system has the type 'long long int'.]) + AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], [1], + [Define to 1 if the system has the type 'unsigned long long int'.]) dnl Check for <wchar.h>, in the same way as gl_WCHAR_H does. AC_CHECK_HEADERS_ONCE([wchar.h]) @@ -40,7 +34,7 @@ AC_DEFUN_ONCE([gl_STDINT_H], AC_SUBST([HAVE_WCHAR_H]) dnl Check for <inttypes.h>. - dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h. + AC_CHECK_HEADERS_ONCE([inttypes.h]) if test $ac_cv_header_inttypes_h = yes; then HAVE_INTTYPES_H=1 else @@ -49,7 +43,7 @@ AC_DEFUN_ONCE([gl_STDINT_H], AC_SUBST([HAVE_INTTYPES_H]) dnl Check for <sys/types.h>. - dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h. + AC_CHECK_HEADERS_ONCE([sys/types.h]) if test $ac_cv_header_sys_types_h = yes; then HAVE_SYS_TYPES_H=1 else @@ -158,7 +152,7 @@ uintmax_t j = UINTMAX_MAX; /* Check that SIZE_MAX has the correct type, if possible. */ #if 201112 <= __STDC_VERSION__ int k = _Generic (SIZE_MAX, size_t: 0); -#elif (2 <= __GNUC__ || defined __IBM__TYPEOF__ \ +#elif (2 <= __GNUC__ || 4 <= __clang_major__ || defined __IBM__TYPEOF__ \ || (0x5110 <= __SUNPRO_C && !__STDC__)) extern size_t k; extern __typeof__ (SIZE_MAX) k; @@ -288,8 +282,12 @@ static const char *macro_values[] = ]])], [gl_cv_header_working_stdint_h=yes], [], - [dnl When cross-compiling, assume it works. - gl_cv_header_working_stdint_h=yes + [case "$host_os" in + # Guess yes on native Windows. + mingw*) gl_cv_header_working_stdint_h="guessing yes" ;; + # In general, assume it works. + *) gl_cv_header_working_stdint_h="guessing yes" ;; + esac ]) ]) ]) @@ -299,15 +297,17 @@ static const char *macro_values[] = HAVE_SYS_BITYPES_H=0 HAVE_SYS_INTTYPES_H=0 STDINT_H=stdint.h - if test "$gl_cv_header_working_stdint_h" = yes; then - HAVE_C99_STDINT_H=1 - dnl Now see whether the system <stdint.h> works without - dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined. - AC_CACHE_CHECK([whether stdint.h predates C++11], - [gl_cv_header_stdint_predates_cxx11_h], - [gl_cv_header_stdint_predates_cxx11_h=yes - AC_COMPILE_IFELSE([ - AC_LANG_PROGRAM([[ + case "$gl_cv_header_working_stdint_h" in + *yes) + HAVE_C99_STDINT_H=1 + dnl Now see whether the system <stdint.h> works without + dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined. + dnl If not, there would be problems when stdint.h is included from C++. + AC_CACHE_CHECK([whether stdint.h works without ISO C predefines], + [gl_cv_header_stdint_without_STDC_macros], + [gl_cv_header_stdint_without_STDC_macros=no + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM([[ #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */ #include <stdint.h> ] @@ -315,49 +315,51 @@ gl_STDINT_INCLUDES [ intmax_t im = INTMAX_MAX; int32_t i32 = INT32_C (0x7fffffff); - ]])], - [gl_cv_header_stdint_predates_cxx11_h=no])]) + ]])], + [gl_cv_header_stdint_without_STDC_macros=yes]) + ]) - if test "$gl_cv_header_stdint_predates_cxx11_h" = yes; then - AC_DEFINE([__STDC_CONSTANT_MACROS], [1], - [Define to 1 if the system <stdint.h> predates C++11.]) - AC_DEFINE([__STDC_LIMIT_MACROS], [1], - [Define to 1 if the system <stdint.h> predates C++11.]) - fi - AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.], - [gl_cv_header_stdint_width], - [gl_cv_header_stdint_width=no - AC_COMPILE_IFELSE( - [AC_LANG_PROGRAM([[ - /* Work if build is not clean. */ - #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 - #ifndef __STDC_WANT_IEC_60559_BFP_EXT__ - #define __STDC_WANT_IEC_60559_BFP_EXT__ 1 - #endif - #include <stdint.h> - ]gl_STDINT_INCLUDES[ - int iw = UINTMAX_WIDTH; - ]])], - [gl_cv_header_stdint_width=yes])]) - if test "$gl_cv_header_stdint_width" = yes; then - STDINT_H= - fi - else - dnl Check for <sys/inttypes.h>, and for - dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5). - AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h]) - if test $ac_cv_header_sys_inttypes_h = yes; then - HAVE_SYS_INTTYPES_H=1 - fi - if test $ac_cv_header_sys_bitypes_h = yes; then - HAVE_SYS_BITYPES_H=1 - fi - gl_STDINT_TYPE_PROPERTIES - fi + if test $gl_cv_header_stdint_without_STDC_macros = no; then + AC_DEFINE([__STDC_CONSTANT_MACROS], [1], + [Define to 1 if the system <stdint.h> predates C++11.]) + AC_DEFINE([__STDC_LIMIT_MACROS], [1], + [Define to 1 if the system <stdint.h> predates C++11.]) + fi + AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.], + [gl_cv_header_stdint_width], + [gl_cv_header_stdint_width=no + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM([[ + /* Work if build is not clean. */ + #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 + #ifndef __STDC_WANT_IEC_60559_BFP_EXT__ + #define __STDC_WANT_IEC_60559_BFP_EXT__ 1 + #endif + #include <stdint.h> + ]gl_STDINT_INCLUDES[ + int iw = UINTMAX_WIDTH; + ]])], + [gl_cv_header_stdint_width=yes])]) + if test "$gl_cv_header_stdint_width" = yes; then + STDINT_H= + fi + ;; + *) + dnl Check for <sys/inttypes.h>, and for + dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5). + AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h]) + if test $ac_cv_header_sys_inttypes_h = yes; then + HAVE_SYS_INTTYPES_H=1 + fi + if test $ac_cv_header_sys_bitypes_h = yes; then + HAVE_SYS_BITYPES_H=1 + fi + gl_STDINT_TYPE_PROPERTIES + ;; + esac dnl The substitute stdint.h needs the substitute limit.h's _GL_INTEGER_WIDTH. - LIMITS_H=limits.h - AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"]) + gl_REPLACE_LIMITS_H AC_SUBST([HAVE_C99_STDINT_H]) AC_SUBST([HAVE_SYS_BITYPES_H]) @@ -491,13 +493,9 @@ AC_DEFUN([gl_INTEGER_TYPE_SUFFIX], dnl gl_STDINT_INCLUDES AC_DEFUN([gl_STDINT_INCLUDES], [[ - /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be - included before <wchar.h>. */ #include <stddef.h> #include <signal.h> #if HAVE_WCHAR_H - # include <stdio.h> - # include <time.h> # include <wchar.h> #endif ]]) @@ -533,9 +531,3 @@ AC_DEFUN([gl_STDINT_TYPE_PROPERTIES], BITSIZEOF_WINT_T=32 fi ]) - -dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in. -dnl Remove this when we can assume autoconf >= 2.61. -m4_ifdef([AC_COMPUTE_INT], [], [ - AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])]) -]) |