Re: PATCH: alternative wcwidth() implementation

[Peter Stephenson <pws@csr.com>]

On Tue, 22 Apr 2008 11:50:18 +0100
Peter Stephenson <pws@csr.com> wrote:
> I note we should supposedly be defining _XOPEN_SOURCE to get wcwidth(),
> at least with glibc, but apparently generally don't (though I did for the
> configure test).  I'm a bit frightened of changing this, but POSIX does
> suggest it's part of the XSI extension, so probably we ought to.
> Indeed, we do define _XOPEN_SOURCE_EXTENDED if needed for curses.h;
> probably the right thing to do is in the #else case, #define
> _XOPEN_SOURCE if MULTIBYTE_SUPPORT is present.

Let's try it.

Index: Src/system.h
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/system.h,v
retrieving revision 1.49
diff -u -r1.49 system.h
--- Src/system.h	14 Dec 2007 15:14:06 -0000	1.49
+++ Src/system.h	22 Apr 2008 16:13:20 -0000
@@ -53,7 +53,12 @@
 #endif
 
 #if defined(ZSH_CURSES_SOURCE) && defined(ZSH_CURSES_NEEDS_XOPEN)
-#define _XOPEN_SOURCE_EXTENDED 1
+# define _XOPEN_SOURCE_EXTENDED 1
+#else
+# ifdef MULTIBYTE_SUPPORT
+/* Needed for wcwidth() which is part of XSI */
+#  define _XOPEN_SOURCE 1
+# endif
 #endif
 
 /*

-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK                          Tel: +44 (0)1223 692070