ncurses: <stdbool.h>

[Ralf S. Engelschall]

NCurses determines the presence of the <stdbool.h> header during its
own build time but the result is used in a public header <curses.h>.
It cannot be assumed that the application building against this public
header <curses.h> also uses the same compiler NCurses was built with.
Hence the public header <curses.h> has to perform an own in-place check
for <stdbool.h>. This way NCurses can be build with OpenPKG's GCC 3.x
while an application could build against the provided <curses.h> with an
arbitrary C compiler (usually a non-GCC 3.x vendor compiler!).

The following patch we are using in the OpenPKG "ncurses" package (see
http://www.openpkg.org/product/packages/?package=ncurses) for over 2
years now with perfect portability results on _all_ major Unix platforms
(OpenPKG is a cross-platform software distribution).

Index: include/curses.h.in
--- include/curses.h.in.orig    2004-02-22 09:36:58.000000000 +0100
+++ include/curses.h.in 2004-02-22 09:37:14.000000000 +0100
@@ -61,7 +61,11 @@
  * User-definable tweak to disable the include of <stdbool.h>.
  */
 #ifndef NCURSES_ENABLE_STDBOOL_H
-#define NCURSES_ENABLE_STDBOOL_H @cf_cv_header_stdbool_h@
+#if defined(__STDC__) && (__STDC_VERSION__ >= 199901L) && !defined(__osf__)
+#define NCURSES_ENABLE_STDBOOL_H 1
+#else
+#define NCURSES_ENABLE_STDBOOL_H 0
+#endif
 #endif

                                       Ralf S. Engelschall
                                       address@hidden
                                       www.engelschall.com