diff options
Diffstat (limited to 'm4/limits-h.m4')
| -rw-r--r-- | m4/limits-h.m4 | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/m4/limits-h.m4 b/m4/limits-h.m4 index 443f91b4d..70dbb7dcf 100644 --- a/m4/limits-h.m4 +++ b/m4/limits-h.m4 @@ -1,6 +1,6 @@ dnl Check whether limits.h has needed features. -dnl Copyright 2016-2017 Free Software Foundation, Inc. +dnl Copyright 2016-2021 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. @@ -11,14 +11,18 @@ AC_DEFUN_ONCE([gl_LIMITS_H], [ gl_CHECK_NEXT_HEADERS([limits.h]) - AC_CACHE_CHECK([whether limits.h has ULLONG_WIDTH etc.], + AC_CACHE_CHECK([whether limits.h has LLONG_MAX, WORD_BIT, ULLONG_WIDTH etc.], [gl_cv_header_limits_width], [AC_COMPILE_IFELSE( - [AC_LANG_PROGRAM([[#ifndef __STDC_WANT_IEC_60559_BFP_EXT__ - #define __STDC_WANT_IEC_60559_BFP_EXT__ 1 - #endif - #include <limits.h> - int ullw = ULLONG_WIDTH;]])], + [AC_LANG_PROGRAM( + [[#ifndef __STDC_WANT_IEC_60559_BFP_EXT__ + #define __STDC_WANT_IEC_60559_BFP_EXT__ 1 + #endif + #include <limits.h> + long long llm = LLONG_MAX; + int wb = WORD_BIT; + int ullw = ULLONG_WIDTH; + ]])], [gl_cv_header_limits_width=yes], [gl_cv_header_limits_width=no])]) if test "$gl_cv_header_limits_width" = yes; then @@ -29,3 +33,11 @@ AC_DEFUN_ONCE([gl_LIMITS_H], AC_SUBST([LIMITS_H]) AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"]) ]) + +dnl Unconditionally enables the replacement of <limits.h>. +AC_DEFUN([gl_REPLACE_LIMITS_H], +[ + AC_REQUIRE([gl_LIMITS_H]) + LIMITS_H='limits.h' + AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"]) +]) |