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Annotation of embedaddon/libiconv/srcm4/limits-h.m4, revision 1.1.1.1

1.1       misho       1: dnl Check whether limits.h has needed features.
                      2: 
                      3: dnl Copyright 2016-2019 Free Software Foundation, Inc.
                      4: dnl This file is free software; the Free Software Foundation
                      5: dnl gives unlimited permission to copy and/or distribute it,
                      6: dnl with or without modifications, as long as this notice is preserved.
                      7: 
                      8: dnl From Paul Eggert.
                      9: 
                     10: AC_DEFUN_ONCE([gl_LIMITS_H],
                     11: [
                     12:   gl_CHECK_NEXT_HEADERS([limits.h])
                     13: 
                     14:   AC_CACHE_CHECK([whether limits.h has LLONG_MAX, WORD_BIT, ULLONG_WIDTH etc.],
                     15:     [gl_cv_header_limits_width],
                     16:     [AC_COMPILE_IFELSE(
                     17:        [AC_LANG_PROGRAM(
                     18:           [[#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
                     19:              #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
                     20:             #endif
                     21:             #include <limits.h>
                     22:             long long llm = LLONG_MAX;
                     23:             int wb = WORD_BIT;
                     24:             int ullw = ULLONG_WIDTH;
                     25:           ]])],
                     26:        [gl_cv_header_limits_width=yes],
                     27:        [gl_cv_header_limits_width=no])])
                     28:   if test "$gl_cv_header_limits_width" = yes; then
                     29:     LIMITS_H=
                     30:   else
                     31:     LIMITS_H=limits.h
                     32:   fi
                     33:   AC_SUBST([LIMITS_H])
                     34:   AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"])
                     35: ])
                     36: 
                     37: dnl Unconditionally enables the replacement of <limits.h>.
                     38: AC_DEFUN([gl_REPLACE_LIMITS_H],
                     39: [
                     40:   AC_REQUIRE([gl_LIMITS_H])
                     41:   LIMITS_H='limits.h'
                     42:   AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"])
                     43: ])