diff options
Diffstat (limited to 'm4/stdbool.m4')
| -rw-r--r-- | m4/stdbool.m4 | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/m4/stdbool.m4 b/m4/stdbool.m4 deleted file mode 100644 index 162f1dfc..00000000 --- a/m4/stdbool.m4 +++ /dev/null @@ -1,108 +0,0 @@ -# Check for stdbool.h that conforms to C99. - -dnl Copyright (C) 2002-2005 Free Software Foundation, Inc. -dnl This file is free software; the Free Software Foundation -dnl gives unlimited permission to copy and/or distribute it, -dnl with or without modifications, as long as this notice is preserved. - -# Prepare for substituting <stdbool.h> if it is not supported. - -AC_DEFUN([AM_STDBOOL_H], -[ - AC_REQUIRE([AC_HEADER_STDBOOL]) - - # Define two additional variables used in the Makefile substitution. - - if test "$ac_cv_header_stdbool_h" = yes; then - STDBOOL_H='' - else - STDBOOL_H='stdbool.h' - fi - AC_SUBST([STDBOOL_H]) - - if test "$ac_cv_type__Bool" = yes; then - HAVE__BOOL=1 - else - HAVE__BOOL=0 - fi - AC_SUBST([HAVE__BOOL]) -]) - -# AM_STDBOOL_H will be renamed to gl_STDBOOL_H in the future. -AC_DEFUN([gl_STDBOOL_H], [AM_STDBOOL_H]) - -# This macro is only needed in autoconf <= 2.59. Newer versions of autoconf -# have this macro built-in. - -AC_DEFUN([AC_HEADER_STDBOOL], - [AC_CACHE_CHECK([for stdbool.h that conforms to C99], - [ac_cv_header_stdbool_h], - [AC_TRY_COMPILE( - [ - #include <stdbool.h> - #ifndef bool - "error: bool is not defined" - #endif - #ifndef false - "error: false is not defined" - #endif - #if false - "error: false is not 0" - #endif - #ifndef true - "error: true is not defined" - #endif - #if true != 1 - "error: true is not 1" - #endif - #ifndef __bool_true_false_are_defined - "error: __bool_true_false_are_defined is not defined" - #endif - - struct s { _Bool s: 1; _Bool t; } s; - - char a[true == 1 ? 1 : -1]; - char b[false == 0 ? 1 : -1]; - char c[__bool_true_false_are_defined == 1 ? 1 : -1]; - char d[(bool) -0.5 == true ? 1 : -1]; - bool e = &s; - char f[(_Bool) -0.0 == false ? 1 : -1]; - char g[true]; - char h[sizeof (_Bool)]; - char i[sizeof s.t]; - enum { j = false, k = true, l = false * true, m = true * 256 }; - _Bool n[m]; - char o[sizeof n == m * sizeof n[0] ? 1 : -1]; - char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1]; - #if defined __xlc__ || __GNUC__ - /* Catch a bug in IBM AIX xlc compiler version 6.0.0.0 - reported by James Lemley on 2005-10-05; see - <http://lists.gnu.org/archive/html/bug-coreutils/2005-10/msg00086.html>. - This test is not quite right, since xlc is allowed to - reject this program, as the initializer for xlcbug is - not one of the forms that C requires support for. - However, doing the test right would require a run-time - test, and that would make cross-compilation harder. - Let us hope that IBM fixes the xlc bug, and also adds - support for this kind of constant expression. In the - meantime, this test will reject xlc, which is OK, since - our stdbool.h substitute should suffice. */ - char digs[] = "0123456789"; - int xlcbug = 1 / (&(digs + 5)[-2 + (bool) 1] == &digs[4] ? 1 : -1); - #endif - _Bool q = true; - _Bool *pq = &q; - ], - [ - *pq |= q; - *pq |= ! q; - /* Refer to every declared value, to avoid compiler optimizations. */ - return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l - + !m + !n + !o + !p + !q + !pq); - ], - [ac_cv_header_stdbool_h=yes], - [ac_cv_header_stdbool_h=no])]) - AC_CHECK_TYPES([_Bool]) - if test $ac_cv_header_stdbool_h = yes; then - AC_DEFINE(HAVE_STDBOOL_H, 1, [Define to 1 if stdbool.h conforms to C99.]) - fi]) |