| 1 | # gnulib-common.m4 serial 67
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| 2 | dnl Copyright (C) 2007-2021 Free Software Foundation, Inc.
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| 3 | dnl This file is free software; the Free Software Foundation
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| 4 | dnl gives unlimited permission to copy and/or distribute it,
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| 5 | dnl with or without modifications, as long as this notice is preserved.
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| 6 |
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| 7 | AC_PREREQ([2.62])
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| 8 |
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| 9 | # gl_COMMON
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| 10 | # is expanded unconditionally through gnulib-tool magic.
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| 11 | AC_DEFUN([gl_COMMON], [
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| 12 | dnl Use AC_REQUIRE here, so that the code is expanded once only.
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| 13 | AC_REQUIRE([gl_00GNULIB])
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| 14 | AC_REQUIRE([gl_COMMON_BODY])
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| 15 | AC_REQUIRE([gl_ZZGNULIB])
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| 16 | ])
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| 17 | AC_DEFUN([gl_COMMON_BODY], [
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| 18 | AH_VERBATIM([_GL_GNUC_PREREQ],
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| 19 | [/* True if the compiler says it groks GNU C version MAJOR.MINOR. */
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| 20 | #if defined __GNUC__ && defined __GNUC_MINOR__
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| 21 | # define _GL_GNUC_PREREQ(major, minor) \
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| 22 | ((major) < __GNUC__ + ((minor) <= __GNUC_MINOR__))
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| 23 | #else
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| 24 | # define _GL_GNUC_PREREQ(major, minor) 0
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| 25 | #endif
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| 26 | ])
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| 27 | AH_VERBATIM([_Noreturn],
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| 28 | [/* The _Noreturn keyword of C11. */
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| 29 | #ifndef _Noreturn
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| 30 | # if (defined __cplusplus \
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| 31 | && ((201103 <= __cplusplus && !(__GNUC__ == 4 && __GNUC_MINOR__ == 7)) \
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| 32 | || (defined _MSC_VER && 1900 <= _MSC_VER)) \
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| 33 | && 0)
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| 34 | /* [[noreturn]] is not practically usable, because with it the syntax
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| 35 | extern _Noreturn void func (...);
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| 36 | would not be valid; such a declaration would only be valid with 'extern'
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| 37 | and '_Noreturn' swapped, or without the 'extern' keyword. However, some
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| 38 | AIX system header files and several gnulib header files use precisely
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| 39 | this syntax with 'extern'. */
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| 40 | # define _Noreturn [[noreturn]]
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| 41 | # elif ((!defined __cplusplus || defined __clang__) \
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| 42 | && (201112 <= (defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) \
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| 43 | || (!defined __STRICT_ANSI__ \
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| 44 | && (_GL_GNUC_PREREQ (4, 7) \
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| 45 | || (defined __apple_build_version__ \
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| 46 | ? 6000000 <= __apple_build_version__ \
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| 47 | : 3 < __clang_major__ + (5 <= __clang_minor__))))))
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| 48 | /* _Noreturn works as-is. */
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| 49 | # elif _GL_GNUC_PREREQ (2, 8) || defined __clang__ || 0x5110 <= __SUNPRO_C
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| 50 | # define _Noreturn __attribute__ ((__noreturn__))
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| 51 | # elif 1200 <= (defined _MSC_VER ? _MSC_VER : 0)
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| 52 | # define _Noreturn __declspec (noreturn)
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| 53 | # else
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| 54 | # define _Noreturn
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| 55 | # endif
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| 56 | #endif
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| 57 | ])
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| 58 | AH_VERBATIM([isoc99_inline],
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| 59 | [/* Work around a bug in Apple GCC 4.0.1 build 5465: In C99 mode, it supports
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| 60 | the ISO C 99 semantics of 'extern inline' (unlike the GNU C semantics of
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| 61 | earlier versions), but does not display it by setting __GNUC_STDC_INLINE__.
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| 62 | __APPLE__ && __MACH__ test for Mac OS X.
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| 63 | __APPLE_CC__ tests for the Apple compiler and its version.
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| 64 | __STDC_VERSION__ tests for the C99 mode. */
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| 65 | #if defined __APPLE__ && defined __MACH__ && __APPLE_CC__ >= 5465 && !defined __cplusplus && __STDC_VERSION__ >= 199901L && !defined __GNUC_STDC_INLINE__
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| 66 | # define __GNUC_STDC_INLINE__ 1
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| 67 | #endif])
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| 68 | AH_VERBATIM([attribute],
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| 69 | [/* Attributes. */
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| 70 | #if (defined __has_attribute \
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| 71 | && (!defined __clang_minor__ \
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| 72 | || 3 < __clang_major__ + (5 <= __clang_minor__)))
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| 73 | # define _GL_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__)
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| 74 | #else
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| 75 | # define _GL_HAS_ATTRIBUTE(attr) _GL_ATTR_##attr
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| 76 | # define _GL_ATTR_alloc_size _GL_GNUC_PREREQ (4, 3)
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| 77 | # define _GL_ATTR_always_inline _GL_GNUC_PREREQ (3, 2)
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| 78 | # define _GL_ATTR_artificial _GL_GNUC_PREREQ (4, 3)
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| 79 | # define _GL_ATTR_cold _GL_GNUC_PREREQ (4, 3)
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| 80 | # define _GL_ATTR_const _GL_GNUC_PREREQ (2, 95)
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| 81 | # define _GL_ATTR_deprecated _GL_GNUC_PREREQ (3, 1)
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| 82 | # define _GL_ATTR_diagnose_if 0
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| 83 | # define _GL_ATTR_error _GL_GNUC_PREREQ (4, 3)
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| 84 | # define _GL_ATTR_externally_visible _GL_GNUC_PREREQ (4, 1)
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| 85 | # define _GL_ATTR_fallthrough _GL_GNUC_PREREQ (7, 0)
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| 86 | # define _GL_ATTR_format _GL_GNUC_PREREQ (2, 7)
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| 87 | # define _GL_ATTR_leaf _GL_GNUC_PREREQ (4, 6)
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| 88 | # define _GL_ATTR_malloc _GL_GNUC_PREREQ (3, 0)
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| 89 | # ifdef _ICC
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| 90 | # define _GL_ATTR_may_alias 0
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| 91 | # else
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| 92 | # define _GL_ATTR_may_alias _GL_GNUC_PREREQ (3, 3)
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| 93 | # endif
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| 94 | # define _GL_ATTR_noinline _GL_GNUC_PREREQ (3, 1)
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| 95 | # define _GL_ATTR_nonnull _GL_GNUC_PREREQ (3, 3)
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| 96 | # define _GL_ATTR_nonstring _GL_GNUC_PREREQ (8, 0)
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| 97 | # define _GL_ATTR_nothrow _GL_GNUC_PREREQ (3, 3)
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| 98 | # define _GL_ATTR_packed _GL_GNUC_PREREQ (2, 7)
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| 99 | # define _GL_ATTR_pure _GL_GNUC_PREREQ (2, 96)
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| 100 | # define _GL_ATTR_returns_nonnull _GL_GNUC_PREREQ (4, 9)
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| 101 | # define _GL_ATTR_sentinel _GL_GNUC_PREREQ (4, 0)
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| 102 | # define _GL_ATTR_unused _GL_GNUC_PREREQ (2, 7)
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| 103 | # define _GL_ATTR_warn_unused_result _GL_GNUC_PREREQ (3, 4)
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| 104 | #endif
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| 105 |
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| 106 | #ifdef __has_c_attribute
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| 107 | # define _GL_HAS_C_ATTRIBUTE(attr) __has_c_attribute (__##attr##__)
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| 108 | #else
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| 109 | # define _GL_HAS_C_ATTRIBUTE(attr) 0
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| 110 | #endif
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| 111 |
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| 112 | ]dnl There is no _GL_ATTRIBUTE_ALIGNED; use stdalign's _Alignas instead.
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| 113 | [
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| 114 | #if _GL_HAS_ATTRIBUTE (alloc_size)
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| 115 | # define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
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| 116 | #else
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| 117 | # define _GL_ATTRIBUTE_ALLOC_SIZE(args)
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| 118 | #endif
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| 119 |
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| 120 | #if _GL_HAS_ATTRIBUTE (always_inline)
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| 121 | # define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
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| 122 | #else
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| 123 | # define _GL_ATTRIBUTE_ALWAYS_INLINE
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| 124 | #endif
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| 125 |
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| 126 | #if _GL_HAS_ATTRIBUTE (artificial)
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| 127 | # define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__))
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| 128 | #else
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| 129 | # define _GL_ATTRIBUTE_ARTIFICIAL
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| 130 | #endif
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| 131 |
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| 132 | /* Avoid __attribute__ ((cold)) on MinGW; see thread starting at
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| 133 | <https://lists.gnu.org/r/emacs-devel/2019-04/msg01152.html>.
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| 134 | Also, Oracle Studio 12.6 requires 'cold' not '__cold__'. */
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| 135 | #if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__
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| 136 | # ifndef __SUNPRO_C
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| 137 | # define _GL_ATTRIBUTE_COLD __attribute__ ((__cold__))
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| 138 | # else
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| 139 | # define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
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| 140 | # endif
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| 141 | #else
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| 142 | # define _GL_ATTRIBUTE_COLD
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| 143 | #endif
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| 144 |
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| 145 | #if _GL_HAS_ATTRIBUTE (const)
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| 146 | # define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
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| 147 | #else
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| 148 | # define _GL_ATTRIBUTE_CONST
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| 149 | #endif
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| 150 |
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| 151 | /* _GL_ATTRIBUTE_DEALLOC (F, I) is for functions returning pointers
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| 152 | that can be freed by passing them as the Ith argument to the
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| 153 | function F. _GL_ATTRIBUTE_DEALLOC_FREE is for functions that
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| 154 | return pointers that can be freed via 'free'; it can be used
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| 155 | only after including stdlib.h. These macros cannot be used on
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| 156 | inline functions. */
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| 157 | #if _GL_GNUC_PREREQ (11, 0)
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| 158 | # define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i)))
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| 159 | #else
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| 160 | # define _GL_ATTRIBUTE_DEALLOC(f, i)
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| 161 | #endif
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| 162 | #define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (free, 1)
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| 163 |
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| 164 | #if _GL_HAS_C_ATTRIBUTE (deprecated)
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| 165 | # define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]]
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| 166 | #elif _GL_HAS_ATTRIBUTE (deprecated)
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| 167 | # define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
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| 168 | #else
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| 169 | # define _GL_ATTRIBUTE_DEPRECATED
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| 170 | #endif
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| 171 |
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| 172 | #if _GL_HAS_ATTRIBUTE (error)
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| 173 | # define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg)))
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| 174 | # define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg)))
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| 175 | #elif _GL_HAS_ATTRIBUTE (diagnose_if)
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| 176 | # define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__diagnose_if__ (1, msg, "error")))
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| 177 | # define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__diagnose_if__ (1, msg, "warning")))
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| 178 | #else
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| 179 | # define _GL_ATTRIBUTE_ERROR(msg)
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| 180 | # define _GL_ATTRIBUTE_WARNING(msg)
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| 181 | #endif
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| 182 |
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| 183 | #if _GL_HAS_ATTRIBUTE (externally_visible)
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| 184 | # define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((externally_visible))
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| 185 | #else
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| 186 | # define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
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| 187 | #endif
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| 188 |
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| 189 | /* FALLTHROUGH is special, because it always expands to something. */
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| 190 | #if _GL_HAS_C_ATTRIBUTE (fallthrough)
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| 191 | # define _GL_ATTRIBUTE_FALLTHROUGH [[__fallthrough__]]
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| 192 | #elif _GL_HAS_ATTRIBUTE (fallthrough)
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| 193 | # define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__))
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| 194 | #else
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| 195 | # define _GL_ATTRIBUTE_FALLTHROUGH ((void) 0)
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| 196 | #endif
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| 197 |
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| 198 | #if _GL_HAS_ATTRIBUTE (format)
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| 199 | # define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
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| 200 | #else
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| 201 | # define _GL_ATTRIBUTE_FORMAT(spec)
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| 202 | #endif
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| 203 |
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| 204 | #if _GL_HAS_ATTRIBUTE (leaf)
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| 205 | # define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__))
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| 206 | #else
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| 207 | # define _GL_ATTRIBUTE_LEAF
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| 208 | #endif
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| 209 |
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| 210 | #if _GL_HAS_ATTRIBUTE (malloc)
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| 211 | # define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
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| 212 | #else
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| 213 | # define _GL_ATTRIBUTE_MALLOC
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| 214 | #endif
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| 215 |
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| 216 | /* Oracle Studio 12.6 mishandles may_alias despite __has_attribute OK. */
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| 217 | #if _GL_HAS_ATTRIBUTE (may_alias) && !defined __SUNPRO_C
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| 218 | # define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
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| 219 | #else
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| 220 | # define _GL_ATTRIBUTE_MAY_ALIAS
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| 221 | #endif
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| 222 |
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| 223 | #if _GL_HAS_C_ATTRIBUTE (maybe_unused)
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| 224 | # define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]]
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| 225 | #else
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| 226 | # define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED
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| 227 | #endif
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| 228 | /* Earlier spellings of this macro. */
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| 229 | #define _UNUSED_PARAMETER_ _GL_ATTRIBUTE_MAYBE_UNUSED
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| 230 |
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| 231 | #if _GL_HAS_C_ATTRIBUTE (nodiscard)
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| 232 | # define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]]
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| 233 | #elif _GL_HAS_ATTRIBUTE (warn_unused_result)
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| 234 | # define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
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| 235 | #else
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| 236 | # define _GL_ATTRIBUTE_NODISCARD
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| 237 | #endif
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| 238 |
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| 239 | #if _GL_HAS_ATTRIBUTE (noinline)
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| 240 | # define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__))
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| 241 | #else
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| 242 | # define _GL_ATTRIBUTE_NOINLINE
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| 243 | #endif
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| 244 |
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| 245 | #if _GL_HAS_ATTRIBUTE (nonnull)
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| 246 | # define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args))
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| 247 | #else
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| 248 | # define _GL_ATTRIBUTE_NONNULL(args)
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| 249 | #endif
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| 250 |
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| 251 | #if _GL_HAS_ATTRIBUTE (nonstring)
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| 252 | # define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
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| 253 | #else
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| 254 | # define _GL_ATTRIBUTE_NONSTRING
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| 255 | #endif
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| 256 |
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| 257 | /* There is no _GL_ATTRIBUTE_NORETURN; use _Noreturn instead. */
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| 258 |
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| 259 | #if _GL_HAS_ATTRIBUTE (nothrow) && !defined __cplusplus
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| 260 | # define _GL_ATTRIBUTE_NOTHROW __attribute__ ((__nothrow__))
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| 261 | #else
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| 262 | # define _GL_ATTRIBUTE_NOTHROW
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| 263 | #endif
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| 264 |
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| 265 | #if _GL_HAS_ATTRIBUTE (packed)
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| 266 | # define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__))
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| 267 | #else
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| 268 | # define _GL_ATTRIBUTE_PACKED
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| 269 | #endif
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| 270 |
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| 271 | #if _GL_HAS_ATTRIBUTE (pure)
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| 272 | # define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
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| 273 | #else
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| 274 | # define _GL_ATTRIBUTE_PURE
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| 275 | #endif
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| 276 |
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| 277 | #if _GL_HAS_ATTRIBUTE (returns_nonnull)
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| 278 | # define _GL_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
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| 279 | #else
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| 280 | # define _GL_ATTRIBUTE_RETURNS_NONNULL
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| 281 | #endif
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| 282 |
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| 283 | #if _GL_HAS_ATTRIBUTE (sentinel)
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| 284 | # define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos))
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| 285 | #else
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| 286 | # define _GL_ATTRIBUTE_SENTINEL(pos)
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| 287 | #endif
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| 288 |
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| 289 | #if _GL_HAS_ATTRIBUTE (unused)
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| 290 | # define _GL_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
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| 291 | #else
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| 292 | # define _GL_ATTRIBUTE_UNUSED
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| 293 | #endif
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| 294 | /* Earlier spellings of this macro. */
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| 295 | #define _GL_UNUSED _GL_ATTRIBUTE_UNUSED
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| 296 |
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| 297 | ]dnl There is no _GL_ATTRIBUTE_VISIBILITY; see m4/visibility.m4 instead.
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| 298 | [
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| 299 | /* To support C++ as well as C, use _GL_UNUSED_LABEL with trailing ';'. */
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| 300 | #if !defined __cplusplus || _GL_GNUC_PREREQ (4, 5)
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| 301 | # define _GL_UNUSED_LABEL _GL_ATTRIBUTE_UNUSED
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| 302 | #else
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| 303 | # define _GL_UNUSED_LABEL
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| 304 | #endif
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| 305 | ])
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| 306 | AH_VERBATIM([async_safe],
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| 307 | [/* The _GL_ASYNC_SAFE marker should be attached to functions that are
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| 308 | signal handlers (for signals other than SIGABRT, SIGPIPE) or can be
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| 309 | invoked from such signal handlers. Such functions have some restrictions:
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| 310 | * All functions that it calls should be marked _GL_ASYNC_SAFE as well,
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| 311 | or should be listed as async-signal-safe in POSIX
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| 312 | <https://pubs.opengroup.org/onlinepubs/9699919799/functions/V2_chap02.html#tag_15_04>
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| 313 | section 2.4.3. Note that malloc(), sprintf(), and fwrite(), in
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| 314 | particular, are NOT async-signal-safe.
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| 315 | * All memory locations (variables and struct fields) that these functions
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| 316 | access must be marked 'volatile'. This holds for both read and write
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| 317 | accesses. Otherwise the compiler might optimize away stores to and
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| 318 | reads from such locations that occur in the program, depending on its
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| 319 | data flow analysis. For example, when the program contains a loop
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| 320 | that is intended to inspect a variable set from within a signal handler
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| 321 | while (!signal_occurred)
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| 322 | ;
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| 323 | the compiler is allowed to transform this into an endless loop if the
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| 324 | variable 'signal_occurred' is not declared 'volatile'.
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| 325 | Additionally, recall that:
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| 326 | * A signal handler should not modify errno (except if it is a handler
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| 327 | for a fatal signal and ends by raising the same signal again, thus
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| 328 | provoking the termination of the process). If it invokes a function
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| 329 | that may clobber errno, it needs to save and restore the value of
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| 330 | errno. */
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| 331 | #define _GL_ASYNC_SAFE
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| 332 | ])
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| 333 | AH_VERBATIM([micro_optimizations],
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| 334 | [/* _GL_CMP (n1, n2) performs a three-valued comparison on n1 vs. n2, where
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| 335 | n1 and n2 are expressions without side effects, that evaluate to real
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| 336 | numbers (excluding NaN).
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| 337 | It returns
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| 338 | 1 if n1 > n2
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| 339 | 0 if n1 == n2
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| 340 | -1 if n1 < n2
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| 341 | The naïve code (n1 > n2 ? 1 : n1 < n2 ? -1 : 0) produces a conditional
|
|---|
| 342 | jump with nearly all GCC versions up to GCC 10.
|
|---|
| 343 | This variant (n1 < n2 ? -1 : n1 > n2) produces a conditional with many
|
|---|
| 344 | GCC versions up to GCC 9.
|
|---|
| 345 | The better code (n1 > n2) - (n1 < n2) from Hacker's Delight § 2-9
|
|---|
| 346 | avoids conditional jumps in all GCC versions >= 3.4. */
|
|---|
| 347 | #define _GL_CMP(n1, n2) (((n1) > (n2)) - ((n1) < (n2)))
|
|---|
| 348 | ])
|
|---|
| 349 | dnl Hint which direction to take regarding cross-compilation guesses:
|
|---|
| 350 | dnl When a user installs a program on a platform they are not intimately
|
|---|
| 351 | dnl familiar with, --enable-cross-guesses=conservative is the appropriate
|
|---|
| 352 | dnl choice. It implements the "If we don't know, assume the worst" principle.
|
|---|
| 353 | dnl However, when an operating system developer (on a platform which is not
|
|---|
| 354 | dnl yet known to gnulib) builds packages for their platform, they want to
|
|---|
| 355 | dnl expose, not hide, possible platform bugs; in this case,
|
|---|
| 356 | dnl --enable-cross-guesses=risky is the appropriate choice.
|
|---|
| 357 | dnl Sets the variables
|
|---|
| 358 | dnl gl_cross_guess_normal (to be used when 'yes' is good and 'no' is bad),
|
|---|
| 359 | dnl gl_cross_guess_inverted (to be used when 'no' is good and 'yes' is bad).
|
|---|
| 360 | AC_ARG_ENABLE([cross-guesses],
|
|---|
| 361 | [AS_HELP_STRING([--enable-cross-guesses={conservative|risky}],
|
|---|
| 362 | [specify policy for cross-compilation guesses])],
|
|---|
| 363 | [if test "x$enableval" != xconservative && test "x$enableval" != xrisky; then
|
|---|
| 364 | AC_MSG_WARN([invalid argument supplied to --enable-cross-guesses])
|
|---|
| 365 | enableval=conservative
|
|---|
| 366 | fi
|
|---|
| 367 | gl_cross_guesses="$enableval"],
|
|---|
| 368 | [gl_cross_guesses=conservative])
|
|---|
| 369 | if test $gl_cross_guesses = risky; then
|
|---|
| 370 | gl_cross_guess_normal="guessing yes"
|
|---|
| 371 | gl_cross_guess_inverted="guessing no"
|
|---|
| 372 | else
|
|---|
| 373 | gl_cross_guess_normal="guessing no"
|
|---|
| 374 | gl_cross_guess_inverted="guessing yes"
|
|---|
| 375 | fi
|
|---|
| 376 | dnl Preparation for running test programs:
|
|---|
| 377 | dnl Tell glibc to write diagnostics from -D_FORTIFY_SOURCE=2 to stderr, not
|
|---|
| 378 | dnl to /dev/tty, so they can be redirected to log files. Such diagnostics
|
|---|
| 379 | dnl arise e.g., in the macros gl_PRINTF_DIRECTIVE_N, gl_SNPRINTF_DIRECTIVE_N.
|
|---|
| 380 | LIBC_FATAL_STDERR_=1
|
|---|
| 381 | export LIBC_FATAL_STDERR_
|
|---|
| 382 | ])
|
|---|
| 383 |
|
|---|
| 384 | # gl_MODULE_INDICATOR_INIT_VARIABLE([variablename])
|
|---|
| 385 | # gl_MODULE_INDICATOR_INIT_VARIABLE([variablename], [initialvalue])
|
|---|
| 386 | # initializes the shell variable that indicates the presence of the given module
|
|---|
| 387 | # as a C preprocessor expression.
|
|---|
| 388 | AC_DEFUN([gl_MODULE_INDICATOR_INIT_VARIABLE],
|
|---|
| 389 | [
|
|---|
| 390 | GL_MODULE_INDICATOR_PREFIX[]_[$1]=m4_if([$2], , [0], [$2])
|
|---|
| 391 | AC_SUBST(GL_MODULE_INDICATOR_PREFIX[]_[$1])
|
|---|
| 392 | ])
|
|---|
| 393 |
|
|---|
| 394 | # gl_MODULE_INDICATOR_CONDITION
|
|---|
| 395 | # expands to a C preprocessor expression that evaluates to 1 or 0, depending
|
|---|
| 396 | # whether a gnulib module that has been requested shall be considered present
|
|---|
| 397 | # or not.
|
|---|
| 398 | m4_define([gl_MODULE_INDICATOR_CONDITION], [1])
|
|---|
| 399 |
|
|---|
| 400 | # gl_MODULE_INDICATOR_SET_VARIABLE([modulename])
|
|---|
| 401 | # sets the shell variable that indicates the presence of the given module to
|
|---|
| 402 | # a C preprocessor expression that will evaluate to 1.
|
|---|
| 403 | AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE],
|
|---|
| 404 | [
|
|---|
| 405 | gl_MODULE_INDICATOR_SET_VARIABLE_AUX(
|
|---|
| 406 | [GL_MODULE_INDICATOR_PREFIX[]_GNULIB_[]m4_translit([[$1]],
|
|---|
| 407 | [abcdefghijklmnopqrstuvwxyz./-],
|
|---|
| 408 | [ABCDEFGHIJKLMNOPQRSTUVWXYZ___])],
|
|---|
| 409 | [gl_MODULE_INDICATOR_CONDITION])
|
|---|
| 410 | ])
|
|---|
| 411 |
|
|---|
| 412 | # gl_MODULE_INDICATOR_SET_VARIABLE_AUX([variable])
|
|---|
| 413 | # modifies the shell variable to include the gl_MODULE_INDICATOR_CONDITION.
|
|---|
| 414 | # The shell variable's value is a C preprocessor expression that evaluates
|
|---|
| 415 | # to 0 or 1.
|
|---|
| 416 | AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX],
|
|---|
| 417 | [
|
|---|
| 418 | m4_if(m4_defn([gl_MODULE_INDICATOR_CONDITION]), [1],
|
|---|
| 419 | [
|
|---|
| 420 | dnl Simplify the expression VALUE || 1 to 1.
|
|---|
| 421 | $1=1
|
|---|
| 422 | ],
|
|---|
| 423 | [gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([$1],
|
|---|
| 424 | [gl_MODULE_INDICATOR_CONDITION])])
|
|---|
| 425 | ])
|
|---|
| 426 |
|
|---|
| 427 | # gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR([variable], [condition])
|
|---|
| 428 | # modifies the shell variable to include the given condition. The shell
|
|---|
| 429 | # variable's value is a C preprocessor expression that evaluates to 0 or 1.
|
|---|
| 430 | AC_DEFUN([gl_MODULE_INDICATOR_SET_VARIABLE_AUX_OR],
|
|---|
| 431 | [
|
|---|
| 432 | dnl Simplify the expression 1 || CONDITION to 1.
|
|---|
| 433 | if test "$[]$1" != 1; then
|
|---|
| 434 | dnl Simplify the expression 0 || CONDITION to CONDITION.
|
|---|
| 435 | if test "$[]$1" = 0; then
|
|---|
| 436 | $1=$2
|
|---|
| 437 | else
|
|---|
| 438 | $1="($[]$1 || $2)"
|
|---|
| 439 | fi
|
|---|
| 440 | fi
|
|---|
| 441 | ])
|
|---|
| 442 |
|
|---|
| 443 | # gl_MODULE_INDICATOR([modulename])
|
|---|
| 444 | # defines a C macro indicating the presence of the given module
|
|---|
| 445 | # in a location where it can be used.
|
|---|
| 446 | # | Value | Value |
|
|---|
| 447 | # | in lib/ | in tests/ |
|
|---|
| 448 | # --------------------------------------------+---------+-----------+
|
|---|
| 449 | # Module present among main modules: | 1 | 1 |
|
|---|
| 450 | # --------------------------------------------+---------+-----------+
|
|---|
| 451 | # Module present among tests-related modules: | 0 | 1 |
|
|---|
| 452 | # --------------------------------------------+---------+-----------+
|
|---|
| 453 | # Module not present at all: | 0 | 0 |
|
|---|
| 454 | # --------------------------------------------+---------+-----------+
|
|---|
| 455 | AC_DEFUN([gl_MODULE_INDICATOR],
|
|---|
| 456 | [
|
|---|
| 457 | AC_DEFINE_UNQUOTED([GNULIB_]m4_translit([[$1]],
|
|---|
| 458 | [abcdefghijklmnopqrstuvwxyz./-],
|
|---|
| 459 | [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]),
|
|---|
| 460 | [gl_MODULE_INDICATOR_CONDITION],
|
|---|
| 461 | [Define to a C preprocessor expression that evaluates to 1 or 0,
|
|---|
| 462 | depending whether the gnulib module $1 shall be considered present.])
|
|---|
| 463 | ])
|
|---|
| 464 |
|
|---|
| 465 | # gl_MODULE_INDICATOR_FOR_TESTS([modulename])
|
|---|
| 466 | # defines a C macro indicating the presence of the given module
|
|---|
| 467 | # in lib or tests. This is useful to determine whether the module
|
|---|
| 468 | # should be tested.
|
|---|
| 469 | # | Value | Value |
|
|---|
| 470 | # | in lib/ | in tests/ |
|
|---|
| 471 | # --------------------------------------------+---------+-----------+
|
|---|
| 472 | # Module present among main modules: | 1 | 1 |
|
|---|
| 473 | # --------------------------------------------+---------+-----------+
|
|---|
| 474 | # Module present among tests-related modules: | 1 | 1 |
|
|---|
| 475 | # --------------------------------------------+---------+-----------+
|
|---|
| 476 | # Module not present at all: | 0 | 0 |
|
|---|
| 477 | # --------------------------------------------+---------+-----------+
|
|---|
| 478 | AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS],
|
|---|
| 479 | [
|
|---|
| 480 | AC_DEFINE([GNULIB_TEST_]m4_translit([[$1]],
|
|---|
| 481 | [abcdefghijklmnopqrstuvwxyz./-],
|
|---|
| 482 | [ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1],
|
|---|
| 483 | [Define to 1 when the gnulib module $1 should be tested.])
|
|---|
| 484 | ])
|
|---|
| 485 |
|
|---|
| 486 | # gl_ASSERT_NO_GNULIB_POSIXCHECK
|
|---|
| 487 | # asserts that there will never be a need to #define GNULIB_POSIXCHECK.
|
|---|
| 488 | # and thereby enables an optimization of configure and config.h.
|
|---|
| 489 | # Used by Emacs.
|
|---|
| 490 | AC_DEFUN([gl_ASSERT_NO_GNULIB_POSIXCHECK],
|
|---|
| 491 | [
|
|---|
| 492 | dnl Override gl_WARN_ON_USE_PREPARE.
|
|---|
| 493 | dnl But hide this definition from 'aclocal'.
|
|---|
| 494 | AC_DEFUN([gl_W][ARN_ON_USE_PREPARE], [])
|
|---|
| 495 | ])
|
|---|
| 496 |
|
|---|
| 497 | # gl_ASSERT_NO_GNULIB_TESTS
|
|---|
| 498 | # asserts that there will be no gnulib tests in the scope of the configure.ac
|
|---|
| 499 | # and thereby enables an optimization of config.h.
|
|---|
| 500 | # Used by Emacs.
|
|---|
| 501 | AC_DEFUN([gl_ASSERT_NO_GNULIB_TESTS],
|
|---|
| 502 | [
|
|---|
| 503 | dnl Override gl_MODULE_INDICATOR_FOR_TESTS.
|
|---|
| 504 | AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], [])
|
|---|
| 505 | ])
|
|---|
| 506 |
|
|---|
| 507 | # Test whether <features.h> exists.
|
|---|
| 508 | # Set HAVE_FEATURES_H.
|
|---|
| 509 | AC_DEFUN([gl_FEATURES_H],
|
|---|
| 510 | [
|
|---|
| 511 | AC_CHECK_HEADERS_ONCE([features.h])
|
|---|
| 512 | if test $ac_cv_header_features_h = yes; then
|
|---|
| 513 | HAVE_FEATURES_H=1
|
|---|
| 514 | else
|
|---|
| 515 | HAVE_FEATURES_H=0
|
|---|
| 516 | fi
|
|---|
| 517 | AC_SUBST([HAVE_FEATURES_H])
|
|---|
| 518 | ])
|
|---|
| 519 |
|
|---|
| 520 | # gl_PROG_CC_C99
|
|---|
| 521 | # Modifies the value of the shell variable CC in an attempt to make $CC
|
|---|
| 522 | # understand ISO C99 source code.
|
|---|
| 523 | AC_DEFUN([gl_PROG_CC_C99],
|
|---|
| 524 | [
|
|---|
| 525 | dnl Just use AC_PROG_CC_C99.
|
|---|
| 526 | dnl When AC_PROG_CC_C99 and AC_PROG_CC_STDC are used together, the substituted
|
|---|
| 527 | dnl value of CC will contain the C99 enabling options twice. But this is only
|
|---|
| 528 | dnl a cosmetic problem.
|
|---|
| 529 | dnl With Autoconf >= 2.70, use AC_PROG_CC since it implies AC_PROG_CC_C99;
|
|---|
| 530 | dnl this avoids a "warning: The macro `AC_PROG_CC_C99' is obsolete."
|
|---|
| 531 | m4_version_prereq([2.70],
|
|---|
| 532 | [AC_REQUIRE([AC_PROG_CC])],
|
|---|
| 533 | [AC_REQUIRE([AC_PROG_CC_C99])])
|
|---|
| 534 | ])
|
|---|
| 535 |
|
|---|
| 536 | # gl_PROG_AR_RANLIB
|
|---|
| 537 | # Determines the values for AR, ARFLAGS, RANLIB that fit with the compiler.
|
|---|
| 538 | # The user can set the variables AR, ARFLAGS, RANLIB if he wants to override
|
|---|
| 539 | # the values.
|
|---|
| 540 | AC_DEFUN([gl_PROG_AR_RANLIB],
|
|---|
| 541 | [
|
|---|
| 542 | dnl Minix 3 comes with two toolchains: The Amsterdam Compiler Kit compiler
|
|---|
| 543 | dnl as "cc", and GCC as "gcc". They have different object file formats and
|
|---|
| 544 | dnl library formats. In particular, the GNU binutils programs ar and ranlib
|
|---|
| 545 | dnl produce libraries that work only with gcc, not with cc.
|
|---|
| 546 | AC_REQUIRE([AC_PROG_CC])
|
|---|
| 547 | dnl The '][' hides this use from 'aclocal'.
|
|---|
| 548 | AC_BEFORE([$0], [A][M_PROG_AR])
|
|---|
| 549 | AC_CACHE_CHECK([for Minix Amsterdam compiler], [gl_cv_c_amsterdam_compiler],
|
|---|
| 550 | [
|
|---|
| 551 | AC_EGREP_CPP([Amsterdam],
|
|---|
| 552 | [
|
|---|
| 553 | #ifdef __ACK__
|
|---|
| 554 | Amsterdam
|
|---|
| 555 | #endif
|
|---|
| 556 | ],
|
|---|
| 557 | [gl_cv_c_amsterdam_compiler=yes],
|
|---|
| 558 | [gl_cv_c_amsterdam_compiler=no])
|
|---|
| 559 | ])
|
|---|
| 560 |
|
|---|
| 561 | dnl Don't compete with AM_PROG_AR's decision about AR/ARFLAGS if we are not
|
|---|
| 562 | dnl building with __ACK__.
|
|---|
| 563 | if test $gl_cv_c_amsterdam_compiler = yes; then
|
|---|
| 564 | if test -z "$AR"; then
|
|---|
| 565 | AR='cc -c.a'
|
|---|
| 566 | fi
|
|---|
| 567 | if test -z "$ARFLAGS"; then
|
|---|
| 568 | ARFLAGS='-o'
|
|---|
| 569 | fi
|
|---|
| 570 | else
|
|---|
| 571 | dnl AM_PROG_AR was added in automake v1.11.2. AM_PROG_AR does not AC_SUBST
|
|---|
| 572 | dnl ARFLAGS variable (it is filed into Makefile.in directly by automake
|
|---|
| 573 | dnl script on-demand, if not specified by ./configure of course).
|
|---|
| 574 | dnl Don't AC_REQUIRE the AM_PROG_AR otherwise the code for __ACK__ above
|
|---|
| 575 | dnl will be ignored. Also, pay attention to call AM_PROG_AR in else block
|
|---|
| 576 | dnl because AM_PROG_AR is written so it could re-set AR variable even for
|
|---|
| 577 | dnl __ACK__. It may seem like its easier to avoid calling the macro here,
|
|---|
| 578 | dnl but we need to AC_SUBST both AR/ARFLAGS (thus those must have some good
|
|---|
| 579 | dnl default value and automake should usually know them).
|
|---|
| 580 | dnl
|
|---|
| 581 | dnl The '][' hides this use from 'aclocal'.
|
|---|
| 582 | m4_ifdef([A][M_PROG_AR], [A][M_PROG_AR], [:])
|
|---|
| 583 | fi
|
|---|
| 584 |
|
|---|
| 585 | dnl In case the code above has not helped with setting AR/ARFLAGS, use
|
|---|
| 586 | dnl Automake-documented default values for AR and ARFLAGS, but prefer
|
|---|
| 587 | dnl ${host}-ar over ar (useful for cross-compiling).
|
|---|
| 588 | AC_CHECK_TOOL([AR], [ar], [ar])
|
|---|
| 589 | if test -z "$ARFLAGS"; then
|
|---|
| 590 | ARFLAGS='cr'
|
|---|
| 591 | fi
|
|---|
| 592 |
|
|---|
| 593 | AC_SUBST([AR])
|
|---|
| 594 | AC_SUBST([ARFLAGS])
|
|---|
| 595 | if test -z "$RANLIB"; then
|
|---|
| 596 | if test $gl_cv_c_amsterdam_compiler = yes; then
|
|---|
| 597 | RANLIB=':'
|
|---|
| 598 | else
|
|---|
| 599 | dnl Use the ranlib program if it is available.
|
|---|
| 600 | AC_PROG_RANLIB
|
|---|
| 601 | fi
|
|---|
| 602 | fi
|
|---|
| 603 | AC_SUBST([RANLIB])
|
|---|
| 604 | ])
|
|---|
| 605 |
|
|---|
| 606 | # AC_C_RESTRICT
|
|---|
| 607 | # This definition is copied from post-2.70 Autoconf and overrides the
|
|---|
| 608 | # AC_C_RESTRICT macro from autoconf 2.60..2.70.
|
|---|
| 609 | m4_version_prereq([2.70.1], [], [
|
|---|
| 610 | AC_DEFUN([AC_C_RESTRICT],
|
|---|
| 611 | [AC_CACHE_CHECK([for C/C++ restrict keyword], [ac_cv_c_restrict],
|
|---|
| 612 | [ac_cv_c_restrict=no
|
|---|
| 613 | # Put '__restrict__' first, to avoid problems with glibc and non-GCC; see:
|
|---|
| 614 | # https://lists.gnu.org/archive/html/bug-autoconf/2016-02/msg00006.html
|
|---|
| 615 | # Put 'restrict' last, because C++ lacks it.
|
|---|
| 616 | for ac_kw in __restrict__ __restrict _Restrict restrict; do
|
|---|
| 617 | AC_COMPILE_IFELSE(
|
|---|
| 618 | [AC_LANG_PROGRAM(
|
|---|
| 619 | [[typedef int *int_ptr;
|
|---|
| 620 | int foo (int_ptr $ac_kw ip) { return ip[0]; }
|
|---|
| 621 | int bar (int [$ac_kw]); /* Catch GCC bug 14050. */
|
|---|
| 622 | int bar (int ip[$ac_kw]) { return ip[0]; }
|
|---|
| 623 | ]],
|
|---|
| 624 | [[int s[1];
|
|---|
| 625 | int *$ac_kw t = s;
|
|---|
| 626 | t[0] = 0;
|
|---|
| 627 | return foo (t) + bar (t);
|
|---|
| 628 | ]])],
|
|---|
| 629 | [ac_cv_c_restrict=$ac_kw])
|
|---|
| 630 | test "$ac_cv_c_restrict" != no && break
|
|---|
| 631 | done
|
|---|
| 632 | ])
|
|---|
| 633 | AH_VERBATIM([restrict],
|
|---|
| 634 | [/* Define to the equivalent of the C99 'restrict' keyword, or to
|
|---|
| 635 | nothing if this is not supported. Do not define if restrict is
|
|---|
| 636 | supported only directly. */
|
|---|
| 637 | #undef restrict
|
|---|
| 638 | /* Work around a bug in older versions of Sun C++, which did not
|
|---|
| 639 | #define __restrict__ or support _Restrict or __restrict__
|
|---|
| 640 | even though the corresponding Sun C compiler ended up with
|
|---|
| 641 | "#define restrict _Restrict" or "#define restrict __restrict__"
|
|---|
| 642 | in the previous line. This workaround can be removed once
|
|---|
| 643 | we assume Oracle Developer Studio 12.5 (2016) or later. */
|
|---|
| 644 | #if defined __SUNPRO_CC && !defined __RESTRICT && !defined __restrict__
|
|---|
| 645 | # define _Restrict
|
|---|
| 646 | # define __restrict__
|
|---|
| 647 | #endif])
|
|---|
| 648 | case $ac_cv_c_restrict in
|
|---|
| 649 | restrict) ;;
|
|---|
| 650 | no) AC_DEFINE([restrict], []) ;;
|
|---|
| 651 | *) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;;
|
|---|
| 652 | esac
|
|---|
| 653 | ])# AC_C_RESTRICT
|
|---|
| 654 | ])
|
|---|
| 655 |
|
|---|
| 656 | # gl_BIGENDIAN
|
|---|
| 657 | # is like AC_C_BIGENDIAN, except that it can be AC_REQUIREd.
|
|---|
| 658 | # Note that AC_REQUIRE([AC_C_BIGENDIAN]) does not work reliably because some
|
|---|
| 659 | # macros invoke AC_C_BIGENDIAN with arguments.
|
|---|
| 660 | AC_DEFUN([gl_BIGENDIAN],
|
|---|
| 661 | [
|
|---|
| 662 | AC_C_BIGENDIAN
|
|---|
| 663 | ])
|
|---|
| 664 |
|
|---|
| 665 | # A temporary file descriptor.
|
|---|
| 666 | # Must be less than 10, because dash 0.5.8 does not support redirections
|
|---|
| 667 | # with multi-digit file descriptors.
|
|---|
| 668 | m4_define([GL_TMP_FD], 9)
|
|---|
| 669 |
|
|---|
| 670 | # gl_SILENT(command)
|
|---|
| 671 | # executes command, but without the normal configure output.
|
|---|
| 672 | # This is useful when you want to invoke AC_CACHE_CHECK (or AC_CHECK_FUNC etc.)
|
|---|
| 673 | # inside another AC_CACHE_CHECK.
|
|---|
| 674 | AC_DEFUN([gl_SILENT],
|
|---|
| 675 | [
|
|---|
| 676 | exec GL_TMP_FD>&AS_MESSAGE_FD AS_MESSAGE_FD>/dev/null
|
|---|
| 677 | $1
|
|---|
| 678 | exec AS_MESSAGE_FD>&GL_TMP_FD GL_TMP_FD>&-
|
|---|
| 679 | ])
|
|---|
| 680 |
|
|---|
| 681 | # gl_CACHE_VAL_SILENT(cache-id, command-to-set-it)
|
|---|
| 682 | # is like AC_CACHE_VAL(cache-id, command-to-set-it), except that it does not
|
|---|
| 683 | # output a spurious "(cached)" mark in the midst of other configure output.
|
|---|
| 684 | # This macro should be used instead of AC_CACHE_VAL when it is not surrounded
|
|---|
| 685 | # by an AC_MSG_CHECKING/AC_MSG_RESULT pair.
|
|---|
| 686 | AC_DEFUN([gl_CACHE_VAL_SILENT],
|
|---|
| 687 | [
|
|---|
| 688 | gl_SILENT([
|
|---|
| 689 | AC_CACHE_VAL([$1], [$2])
|
|---|
| 690 | ])
|
|---|
| 691 | ])
|
|---|
| 692 |
|
|---|
| 693 | # gl_CC_ALLOW_WARNINGS
|
|---|
| 694 | # sets and substitutes a variable GL_CFLAG_ALLOW_WARNINGS, to a $(CC) option
|
|---|
| 695 | # that reverts a preceding '-Werror' option, if available.
|
|---|
| 696 | # This is expected to be '-Wno-error' on gcc, clang (except clang/MSVC), xlclang
|
|---|
| 697 | # and empty otherwise.
|
|---|
| 698 | AC_DEFUN([gl_CC_ALLOW_WARNINGS],
|
|---|
| 699 | [
|
|---|
| 700 | AC_REQUIRE([AC_PROG_CC])
|
|---|
| 701 | AC_CACHE_CHECK([for C compiler option to allow warnings],
|
|---|
| 702 | [gl_cv_cc_wallow],
|
|---|
| 703 | [rm -f conftest*
|
|---|
| 704 | echo 'int dummy;' > conftest.c
|
|---|
| 705 | AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c 2>conftest1.err]) >/dev/null
|
|---|
| 706 | AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -Wno-error -c conftest.c 2>conftest2.err]) >/dev/null
|
|---|
| 707 | dnl Test the number of error output lines, because AIX xlc accepts the
|
|---|
| 708 | dnl option '-Wno-error', just to produce a warning
|
|---|
| 709 | dnl "Option -Wno-error was incorrectly specified. The option will be ignored."
|
|---|
| 710 | dnl afterwards.
|
|---|
| 711 | if test $? = 0 && test `wc -l < conftest1.err` = `wc -l < conftest2.err`; then
|
|---|
| 712 | gl_cv_cc_wallow='-Wno-error'
|
|---|
| 713 | else
|
|---|
| 714 | gl_cv_cc_wallow=none
|
|---|
| 715 | fi
|
|---|
| 716 | rm -f conftest*
|
|---|
| 717 | ])
|
|---|
| 718 | case "$gl_cv_cc_wallow" in
|
|---|
| 719 | none) GL_CFLAG_ALLOW_WARNINGS='' ;;
|
|---|
| 720 | *) GL_CFLAG_ALLOW_WARNINGS="$gl_cv_cc_wallow" ;;
|
|---|
| 721 | esac
|
|---|
| 722 | AC_SUBST([GL_CFLAG_ALLOW_WARNINGS])
|
|---|
| 723 | ])
|
|---|
| 724 |
|
|---|
| 725 | # gl_CXX_ALLOW_WARNINGS
|
|---|
| 726 | # sets and substitutes a variable GL_CXXFLAG_ALLOW_WARNINGS, to a $(CC) option
|
|---|
| 727 | # that reverts a preceding '-Werror' option, if available.
|
|---|
| 728 | AC_DEFUN([gl_CXX_ALLOW_WARNINGS],
|
|---|
| 729 | [
|
|---|
| 730 | dnl Requires AC_PROG_CXX or gl_PROG_ANSI_CXX.
|
|---|
| 731 | if test -n "$CXX" && test "$CXX" != no; then
|
|---|
| 732 | AC_CACHE_CHECK([for C++ compiler option to allow warnings],
|
|---|
| 733 | [gl_cv_cxx_wallow],
|
|---|
| 734 | [rm -f conftest*
|
|---|
| 735 | echo 'int dummy;' > conftest.cc
|
|---|
| 736 | AC_TRY_COMMAND([${CXX-c++} $CXXFLAGS $CPPFLAGS -c conftest.cc 2>conftest1.err]) >/dev/null
|
|---|
| 737 | AC_TRY_COMMAND([${CXX-c++} $CXXFLAGS $CPPFLAGS -Wno-error -c conftest.cc 2>conftest2.err]) >/dev/null
|
|---|
| 738 | dnl Test the number of error output lines, because AIX xlC accepts the
|
|---|
| 739 | dnl option '-Wno-error', just to produce a warning
|
|---|
| 740 | dnl "Option -Wno-error was incorrectly specified. The option will be ignored."
|
|---|
| 741 | dnl afterwards.
|
|---|
| 742 | if test $? = 0 && test `wc -l < conftest1.err` = `wc -l < conftest2.err`; then
|
|---|
| 743 | gl_cv_cxx_wallow='-Wno-error'
|
|---|
| 744 | else
|
|---|
| 745 | gl_cv_cxx_wallow=none
|
|---|
| 746 | fi
|
|---|
| 747 | rm -f conftest*
|
|---|
| 748 | ])
|
|---|
| 749 | case "$gl_cv_cxx_wallow" in
|
|---|
| 750 | none) GL_CXXFLAG_ALLOW_WARNINGS='' ;;
|
|---|
| 751 | *) GL_CXXFLAG_ALLOW_WARNINGS="$gl_cv_cxx_wallow" ;;
|
|---|
| 752 | esac
|
|---|
| 753 | else
|
|---|
| 754 | GL_CXXFLAG_ALLOW_WARNINGS=''
|
|---|
| 755 | fi
|
|---|
| 756 | AC_SUBST([GL_CXXFLAG_ALLOW_WARNINGS])
|
|---|
| 757 | ])
|
|---|
| 758 |
|
|---|
| 759 | dnl Expands to some code for use in .c programs that, on native Windows, defines
|
|---|
| 760 | dnl the Microsoft deprecated alias function names to the underscore-prefixed
|
|---|
| 761 | dnl actual function names. With this macro, these function names are available
|
|---|
| 762 | dnl without linking with '-loldnames' and without generating warnings.
|
|---|
| 763 | dnl Usage: Use it after all system header files are included.
|
|---|
| 764 | dnl #include <...>
|
|---|
| 765 | dnl #include <...>
|
|---|
| 766 | dnl ]GL_MDA_DEFINES[
|
|---|
| 767 | dnl ...
|
|---|
| 768 | AC_DEFUN([GL_MDA_DEFINES],[
|
|---|
| 769 | AC_REQUIRE([_GL_MDA_DEFINES])
|
|---|
| 770 | [$gl_mda_defines]
|
|---|
| 771 | ])
|
|---|
| 772 | AC_DEFUN([_GL_MDA_DEFINES],
|
|---|
| 773 | [gl_mda_defines='
|
|---|
| 774 | #if defined _WIN32 && !defined __CYGWIN__
|
|---|
| 775 | #define access _access
|
|---|
| 776 | #define chdir _chdir
|
|---|
| 777 | #define chmod _chmod
|
|---|
| 778 | #define close _close
|
|---|
| 779 | #define creat _creat
|
|---|
| 780 | #define dup _dup
|
|---|
| 781 | #define dup2 _dup2
|
|---|
| 782 | #define ecvt _ecvt
|
|---|
| 783 | #define execl _execl
|
|---|
| 784 | #define execle _execle
|
|---|
| 785 | #define execlp _execlp
|
|---|
| 786 | #define execv _execv
|
|---|
| 787 | #define execve _execve
|
|---|
| 788 | #define execvp _execvp
|
|---|
| 789 | #define execvpe _execvpe
|
|---|
| 790 | #define fcloseall _fcloseall
|
|---|
| 791 | #define fcvt _fcvt
|
|---|
| 792 | #define fdopen _fdopen
|
|---|
| 793 | #define fileno _fileno
|
|---|
| 794 | #define gcvt _gcvt
|
|---|
| 795 | #define getcwd _getcwd
|
|---|
| 796 | #define getpid _getpid
|
|---|
| 797 | #define getw _getw
|
|---|
| 798 | #define isatty _isatty
|
|---|
| 799 | #define j0 _j0
|
|---|
| 800 | #define j1 _j1
|
|---|
| 801 | #define jn _jn
|
|---|
| 802 | #define lfind _lfind
|
|---|
| 803 | #define lsearch _lsearch
|
|---|
| 804 | #define lseek _lseek
|
|---|
| 805 | #define memccpy _memccpy
|
|---|
| 806 | #define mkdir _mkdir
|
|---|
| 807 | #define mktemp _mktemp
|
|---|
| 808 | #define open _open
|
|---|
| 809 | #define putenv _putenv
|
|---|
| 810 | #define putw _putw
|
|---|
| 811 | #define read _read
|
|---|
| 812 | #define rmdir _rmdir
|
|---|
| 813 | #define strdup _strdup
|
|---|
| 814 | #define swab _swab
|
|---|
| 815 | #define tempnam _tempnam
|
|---|
| 816 | #define tzset _tzset
|
|---|
| 817 | #define umask _umask
|
|---|
| 818 | #define unlink _unlink
|
|---|
| 819 | #define utime _utime
|
|---|
| 820 | #define wcsdup _wcsdup
|
|---|
| 821 | #define write _write
|
|---|
| 822 | #define y0 _y0
|
|---|
| 823 | #define y1 _y1
|
|---|
| 824 | #define yn _yn
|
|---|
| 825 | #endif
|
|---|
| 826 | '
|
|---|
| 827 | ])
|
|---|
