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Last change
on this file was 3529, checked in by bird, 3 years ago |
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Imported grep 3.7 from grep-3.7.tar.gz (sha256: c22b0cf2d4f6bbe599c902387e8058990e1eee99aef333a203829e5fd3dbb342), applying minimal auto-props.
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File size:
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| 1 | dnl Check whether limits.h has needed features.
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| 2 |
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| 3 | dnl Copyright 2016-2021 Free Software Foundation, Inc.
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| 4 | dnl This file is free software; the Free Software Foundation
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| 5 | dnl gives unlimited permission to copy and/or distribute it,
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| 6 | dnl with or without modifications, as long as this notice is preserved.
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| 7 |
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| 8 | dnl From Paul Eggert.
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| 9 |
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| 10 | AC_DEFUN_ONCE([gl_LIMITS_H],
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| 11 | [
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| 12 | gl_CHECK_NEXT_HEADERS([limits.h])
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| 13 |
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| 14 | AC_CACHE_CHECK([whether limits.h has WORD_BIT, BOOL_WIDTH etc.],
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| 15 | [gl_cv_header_limits_width],
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| 16 | [AC_COMPILE_IFELSE(
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| 17 | [AC_LANG_PROGRAM(
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| 18 | [[#ifndef __STDC_WANT_IEC_60559_BFP_EXT__
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| 19 | #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
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| 20 | #endif
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| 21 | #include <limits.h>
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| 22 | long long llm = LLONG_MAX;
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| 23 | int wb = WORD_BIT;
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| 24 | int ullw = ULLONG_WIDTH;
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| 25 | int bw = BOOL_WIDTH;
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| 26 | ]])],
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| 27 | [gl_cv_header_limits_width=yes],
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| 28 | [gl_cv_header_limits_width=no])])
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| 29 | if test "$gl_cv_header_limits_width" = yes; then
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| 30 | LIMITS_H=
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| 31 | else
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| 32 | LIMITS_H=limits.h
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| 33 | fi
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| 34 | AC_SUBST([LIMITS_H])
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| 35 | AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"])
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| 36 | ])
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| 37 |
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| 38 | dnl Unconditionally enables the replacement of <limits.h>.
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| 39 | AC_DEFUN([gl_REPLACE_LIMITS_H],
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| 40 | [
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| 41 | AC_REQUIRE([gl_LIMITS_H])
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| 42 | LIMITS_H='limits.h'
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| 43 | AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"])
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| 44 | ])
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