[Gltt-devel] Compiling gltt under RedHat 7.0

[Christophe T. <ch....@co...>]

Hello folks.

I'd like to comment on the tweak to compile gltt under RH 7.0, since I
ran into the problem myself.

Gerard had to make the following change to compile under RH7.0:

diff GLTTGlyphPolygonizer.C /usr/local/src/gltt-2.5/
184c184,185
<   typedef void CALLBACK (*glu_callback)(CALLBACKARG);
---
>   typedef void (*glu_callback)();
>   //  typedef void CALLBACK (*glu_callback)(CALLBACKARG);

As you may know, RedHat has made a highly controversial move by
shipping a new version of gcc (actually the snapshot of a work in
progress) with the 7.0 distribution. It is labeled "2.96". This had
the sad effect, among other things, to break a lot of C++ code
around. However, given the large base of RedHat users, we may want
that those who want can compile gltt effortlessly, while at the same
time keeping people using another compiler happy. The problem would
have surfaced at one time or another anyway, with the upcoming of the
new gcc compiler. So, I would (humbly) suggest to alter the
conditional around CALLBACKARG, as shown by the patch at the end of
this message.

Best regards,

PS: I'm heading to Asia for two weeks, so I may not respond to my
emails soon.

-- 
Christophe Tronche	ch....@co...
marchFIRST (France)	http://tronche.com/

======================================================================
--- gltt-2.5/GLTTGlyphPolygonizer.C     Sun Nov 21 02:04:43 1999
+++ gltt-2.5-new/GLTTGlyphPolygonizer.C Thu Nov  2 00:03:56 2000
@@ -107,7 +107,7 @@
 #endif
 
 // IMHO, the (...) vs. (void) warning is due to GNU-C/C++.
-#if defined(__GNUC__) || defined(_GNUG_)
+#if (defined(__GNUC__) || defined(_GNUG_)) && !__GNUC_PREREQ(2,96)
  #define CALLBACKARG ...
 #else
  #define CALLBACKARG void