Use the compiler-provided booleans if available, otherwise emulate

Both C and C++ have "bool", "true" and "false" in lower case; C
requires <stdbool.h> for this, in C++ it is an inherent type built
into the compiler.  Use those instead of the old macros; emulate with
a simple typedef enum if unavailable.

1 files changed, 8 insertions, 0 deletions

diff --git a/compiler.h b/compiler.h
index 5f35490e..3b36e97a 100644
--- a/compiler.h
+++ b/compiler.h
@@ -60,4 +60,12 @@ int vsnprintf(char *, size_t, const char *, va_list);
 # endif
 #endif
 
+#ifndef __cplusplus		/* C++ has false, true, bool as keywords */
+# ifdef HAVE_STDBOOL_H
+#  include <stdbool.h>
+# else
+typedef enum { false, true } bool;
+# endif
+#endif
+
 #endif	/* NASM_COMPILER_H */