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| author | H. Peter Anvin <hpa@zytor.com> | 2009-03-01 13:57:40 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-03-01 13:57:40 -0800 |
| commit | 1fb908c0dbf5bdde4d4aaaf78b48b6520d52de4c (patch) | |
| tree | f4850a76f97b9bdfa7885f56bba70e2285a045c4 | |
| parent | 16a856cd851858f80b1ef407d77f92df309e5909 (diff) | |
| download | nasm-1fb908c0dbf5bdde4d4aaaf78b48b6520d52de4c.tar.gz nasm-1fb908c0dbf5bdde4d4aaaf78b48b6520d52de4c.tar.bz2 nasm-1fb908c0dbf5bdde4d4aaaf78b48b6520d52de4c.zip | |
autoconf: detect the broken bool in OpenWatcom 1.8
OpenWatcom 1.8 has a C99 mode, which implements _Bool and
<stdbool.h>. Unfortunately the implementation is broken, and doesn't
let _Bool be implicitly converted to integer (as required by the C99
spec). Detect this case in autoconf.
| -rw-r--r-- | aclocal.m4 | 24 | ||||
| -rw-r--r-- | compiler.h | 2 | ||||
| -rw-r--r-- | configure.in | 1 |
3 files changed, 26 insertions, 1 deletions
@@ -13,3 +13,27 @@ AC_DEFUN(PA_ADD_CFLAGS, AC_MSG_RESULT([no]) CFLAGS="$pa_add_cflags__old_cflags")]) +dnl -------------------------------------------------------------------------- +dnl PA_WORKING_STDBOOL +dnl +dnl See if we have a working <stdbool.h> and bool support; in particular, +dnl OpenWatcom 1.8 has a broken _Bool type that we don't want to use. +dnl -------------------------------------------------------------------------- +AC_DEFUN(PA_WORKING_BOOL, +[AC_MSG_CHECKING([if $CC has a working bool type]) + AC_COMPILE_IFELSE( + [ +#ifndef __cplusplus +#include <stdbool.h> +#endif +int foo(bool x, int y) +{ + return x+y; +} + ], + [AC_MSG_RESULT([yes]) + AC_DEFINE(HAVE_WORKING_BOOL, 1, + [Define to 1 if your compiler has a correct implementation of bool])], + [AC_MSG_RESULT([no])]) +]) + @@ -78,7 +78,7 @@ int vsnprintf(char *, size_t, const char *, va_list); #endif #ifndef __cplusplus /* C++ has false, true, bool as keywords */ -# ifdef HAVE_STDBOOL_H +# if defined(HAVE_STDBOOL_H) && defined(HAVE_WORKING_BOOL) # include <stdbool.h> # else /* This is sort of dangerous, since casts will behave different than diff --git a/configure.in b/configure.in index 0d53653..b47675b 100644 --- a/configure.in +++ b/configure.in @@ -97,6 +97,7 @@ AC_C_CONST AC_C_INLINE AC_C_RESTRICT AC_TYPE_SIZE_T +PA_WORKING_BOOL AC_C_BIGENDIAN(AC_DEFINE(WORDS_BIGENDIAN),AC_DEFINE(WORDS_LITTLEENDIAN)) AH_TEMPLATE(WORDS_BIGENDIAN, [Define to 1 if your processor stores words with the most significant |