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libiconv 1.16

    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: ])