1fb908c0db
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.
39 lines
1.2 KiB
Text
39 lines
1.2 KiB
Text
dnl --------------------------------------------------------------------------
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dnl PA_ADD_CFLAGS()
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dnl
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dnl Attempt to add the given option to CFLAGS, if it doesn't break compilation
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dnl --------------------------------------------------------------------------
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AC_DEFUN(PA_ADD_CFLAGS,
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[AC_MSG_CHECKING([if $CC accepts $1])
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pa_add_cflags__old_cflags="$CFLAGS"
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CFLAGS="$CFLAGS $1"
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AC_TRY_LINK([#include <stdio.h>],
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[printf("Hello, World!\n");],
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AC_MSG_RESULT([yes]),
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AC_MSG_RESULT([no])
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CFLAGS="$pa_add_cflags__old_cflags")])
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dnl --------------------------------------------------------------------------
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dnl PA_WORKING_STDBOOL
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dnl
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dnl See if we have a working <stdbool.h> and bool support; in particular,
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dnl OpenWatcom 1.8 has a broken _Bool type that we don't want to use.
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dnl --------------------------------------------------------------------------
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AC_DEFUN(PA_WORKING_BOOL,
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[AC_MSG_CHECKING([if $CC has a working bool type])
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AC_COMPILE_IFELSE(
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[
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#ifndef __cplusplus
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#include <stdbool.h>
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#endif
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int foo(bool x, int y)
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{
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return x+y;
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}
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],
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[AC_MSG_RESULT([yes])
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AC_DEFINE(HAVE_WORKING_BOOL, 1,
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[Define to 1 if your compiler has a correct implementation of bool])],
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[AC_MSG_RESULT([no])])
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])
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