diff options
Diffstat (limited to 'gl/m4/stdbool.m4')
-rw-r--r-- | gl/m4/stdbool.m4 | 140 |
1 files changed, 70 insertions, 70 deletions
diff --git a/gl/m4/stdbool.m4 b/gl/m4/stdbool.m4 index 57c804a8..3d672d74 100644 --- a/gl/m4/stdbool.m4 +++ b/gl/m4/stdbool.m4 | |||
@@ -1,6 +1,6 @@ | |||
1 | # Check for stdbool.h that conforms to C99. | 1 | # Check for stdbool.h that conforms to C99. |
2 | 2 | ||
3 | dnl Copyright (C) 2002-2006, 2009 Free Software Foundation, Inc. | 3 | dnl Copyright (C) 2002-2006, 2009-2010 Free Software Foundation, Inc. |
4 | dnl This file is free software; the Free Software Foundation | 4 | dnl This file is free software; the Free Software Foundation |
5 | dnl gives unlimited permission to copy and/or distribute it, | 5 | dnl gives unlimited permission to copy and/or distribute it, |
6 | dnl with or without modifications, as long as this notice is preserved. | 6 | dnl with or without modifications, as long as this notice is preserved. |
@@ -38,77 +38,77 @@ AC_DEFUN([AC_HEADER_STDBOOL], | |||
38 | [AC_CACHE_CHECK([for stdbool.h that conforms to C99], | 38 | [AC_CACHE_CHECK([for stdbool.h that conforms to C99], |
39 | [ac_cv_header_stdbool_h], | 39 | [ac_cv_header_stdbool_h], |
40 | [AC_TRY_COMPILE( | 40 | [AC_TRY_COMPILE( |
41 | [ | 41 | [ |
42 | #include <stdbool.h> | 42 | #include <stdbool.h> |
43 | #ifndef bool | 43 | #ifndef bool |
44 | "error: bool is not defined" | 44 | "error: bool is not defined" |
45 | #endif | 45 | #endif |
46 | #ifndef false | 46 | #ifndef false |
47 | "error: false is not defined" | 47 | "error: false is not defined" |
48 | #endif | 48 | #endif |
49 | #if false | 49 | #if false |
50 | "error: false is not 0" | 50 | "error: false is not 0" |
51 | #endif | 51 | #endif |
52 | #ifndef true | 52 | #ifndef true |
53 | "error: true is not defined" | 53 | "error: true is not defined" |
54 | #endif | 54 | #endif |
55 | #if true != 1 | 55 | #if true != 1 |
56 | "error: true is not 1" | 56 | "error: true is not 1" |
57 | #endif | 57 | #endif |
58 | #ifndef __bool_true_false_are_defined | 58 | #ifndef __bool_true_false_are_defined |
59 | "error: __bool_true_false_are_defined is not defined" | 59 | "error: __bool_true_false_are_defined is not defined" |
60 | #endif | 60 | #endif |
61 | 61 | ||
62 | struct s { _Bool s: 1; _Bool t; } s; | 62 | struct s { _Bool s: 1; _Bool t; } s; |
63 | 63 | ||
64 | char a[true == 1 ? 1 : -1]; | 64 | char a[true == 1 ? 1 : -1]; |
65 | char b[false == 0 ? 1 : -1]; | 65 | char b[false == 0 ? 1 : -1]; |
66 | char c[__bool_true_false_are_defined == 1 ? 1 : -1]; | 66 | char c[__bool_true_false_are_defined == 1 ? 1 : -1]; |
67 | char d[(bool) 0.5 == true ? 1 : -1]; | 67 | char d[(bool) 0.5 == true ? 1 : -1]; |
68 | bool e = &s; | 68 | bool e = &s; |
69 | char f[(_Bool) 0.0 == false ? 1 : -1]; | 69 | char f[(_Bool) 0.0 == false ? 1 : -1]; |
70 | char g[true]; | 70 | char g[true]; |
71 | char h[sizeof (_Bool)]; | 71 | char h[sizeof (_Bool)]; |
72 | char i[sizeof s.t]; | 72 | char i[sizeof s.t]; |
73 | enum { j = false, k = true, l = false * true, m = true * 256 }; | 73 | enum { j = false, k = true, l = false * true, m = true * 256 }; |
74 | _Bool n[m]; | 74 | _Bool n[m]; |
75 | char o[sizeof n == m * sizeof n[0] ? 1 : -1]; | 75 | char o[sizeof n == m * sizeof n[0] ? 1 : -1]; |
76 | char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1]; | 76 | char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1]; |
77 | #if defined __xlc__ || defined __GNUC__ | 77 | #if defined __xlc__ || defined __GNUC__ |
78 | /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0 | 78 | /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0 |
79 | reported by James Lemley on 2005-10-05; see | 79 | reported by James Lemley on 2005-10-05; see |
80 | http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html | 80 | http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html |
81 | This test is not quite right, since xlc is allowed to | 81 | This test is not quite right, since xlc is allowed to |
82 | reject this program, as the initializer for xlcbug is | 82 | reject this program, as the initializer for xlcbug is |
83 | not one of the forms that C requires support for. | 83 | not one of the forms that C requires support for. |
84 | However, doing the test right would require a run-time | 84 | However, doing the test right would require a run-time |
85 | test, and that would make cross-compilation harder. | 85 | test, and that would make cross-compilation harder. |
86 | Let us hope that IBM fixes the xlc bug, and also adds | 86 | Let us hope that IBM fixes the xlc bug, and also adds |
87 | support for this kind of constant expression. In the | 87 | support for this kind of constant expression. In the |
88 | meantime, this test will reject xlc, which is OK, since | 88 | meantime, this test will reject xlc, which is OK, since |
89 | our stdbool.h substitute should suffice. We also test | 89 | our stdbool.h substitute should suffice. We also test |
90 | this with GCC, where it should work, to detect more | 90 | this with GCC, where it should work, to detect more |
91 | quickly whether someone messes up the test in the | 91 | quickly whether someone messes up the test in the |
92 | future. */ | 92 | future. */ |
93 | char digs[] = "0123456789"; | 93 | char digs[] = "0123456789"; |
94 | int xlcbug = 1 / (&(digs + 5)[-2 + (bool) 1] == &digs[4] ? 1 : -1); | 94 | int xlcbug = 1 / (&(digs + 5)[-2 + (bool) 1] == &digs[4] ? 1 : -1); |
95 | #endif | 95 | #endif |
96 | /* Catch a bug in an HP-UX C compiler. See | 96 | /* Catch a bug in an HP-UX C compiler. See |
97 | http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html | 97 | http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html |
98 | http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html | 98 | http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html |
99 | */ | 99 | */ |
100 | _Bool q = true; | 100 | _Bool q = true; |
101 | _Bool *pq = &q; | 101 | _Bool *pq = &q; |
102 | ], | 102 | ], |
103 | [ | 103 | [ |
104 | *pq |= q; | 104 | *pq |= q; |
105 | *pq |= ! q; | 105 | *pq |= ! q; |
106 | /* Refer to every declared value, to avoid compiler optimizations. */ | 106 | /* Refer to every declared value, to avoid compiler optimizations. */ |
107 | return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l | 107 | return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l |
108 | + !m + !n + !o + !p + !q + !pq); | 108 | + !m + !n + !o + !p + !q + !pq); |
109 | ], | 109 | ], |
110 | [ac_cv_header_stdbool_h=yes], | 110 | [ac_cv_header_stdbool_h=yes], |
111 | [ac_cv_header_stdbool_h=no])]) | 111 | [ac_cv_header_stdbool_h=no])]) |
112 | AC_CHECK_TYPES([_Bool]) | 112 | AC_CHECK_TYPES([_Bool]) |
113 | if test $ac_cv_header_stdbool_h = yes; then | 113 | if test $ac_cv_header_stdbool_h = yes; then |
114 | AC_DEFINE([HAVE_STDBOOL_H], [1], [Define to 1 if stdbool.h conforms to C99.]) | 114 | AC_DEFINE([HAVE_STDBOOL_H], [1], [Define to 1 if stdbool.h conforms to C99.]) |