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* [Bug c++/32364] New: Error from simple typedef/void combination
@ 2007-06-16 4:38 skunk at iskunk dot org
2007-06-16 4:53 ` [Bug c++/32364] " pinskia at gcc dot gnu dot org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: skunk at iskunk dot org @ 2007-06-16 4:38 UTC (permalink / raw)
To: gcc-bugs
Came across this head-scratcher in building Qt with GCC 4.2.0. Heavily
simplified version:
foo.cxx:
typedef void (*funcptr)(void);
typedef void GLvoid;
typedef GLvoid (*_GLUfuncptr)(GLvoid);
int foo(void) { return 1; }
$ g++ -c foo.cxx
foo.cxx:4: error: '<anonymous>' has incomplete type
foo.cxx:4: error: invalid use of 'GLvoid'
Compiles fine with 4.1.2 and 2.95.4.
--
Summary: Error from simple typedef/void combination
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: skunk at iskunk dot org
GCC build triplet: i386-unknown-freebsd4.8
GCC host triplet: i386-unknown-freebsd4.8
GCC target triplet: i386-unknown-freebsd4.8
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32364
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/32364] Error from simple typedef/void combination
2007-06-16 4:38 [Bug c++/32364] New: Error from simple typedef/void combination skunk at iskunk dot org
@ 2007-06-16 4:53 ` pinskia at gcc dot gnu dot org
2007-08-15 19:08 ` craig dot powers at gmail dot com
2007-08-15 19:13 ` craig dot powers at gmail dot com
2 siblings, 0 replies; 4+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2007-06-16 4:53 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from pinskia at gcc dot gnu dot org 2007-06-16 04:53 -------
This is actually invalid C++ which we did not reject before 4.2.0.
*** This bug has been marked as a duplicate of 9278 ***
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32364
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/32364] Error from simple typedef/void combination
2007-06-16 4:38 [Bug c++/32364] New: Error from simple typedef/void combination skunk at iskunk dot org
2007-06-16 4:53 ` [Bug c++/32364] " pinskia at gcc dot gnu dot org
@ 2007-08-15 19:08 ` craig dot powers at gmail dot com
2007-08-15 19:13 ` craig dot powers at gmail dot com
2 siblings, 0 replies; 4+ messages in thread
From: craig dot powers at gmail dot com @ 2007-08-15 19:08 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from craig dot powers at gmail dot com 2007-08-15 19:08 -------
(In reply to comment #0)
> Came across this head-scratcher in building Qt with GCC 4.2.0. Heavily
> simplified version:
>
> foo.cxx:
> typedef void (*funcptr)(void);
>
> typedef void GLvoid;
> typedef GLvoid (*_GLUfuncptr)(GLvoid);
>
> int foo(void) { return 1; }
>
> $ g++ -c foo.cxx
> foo.cxx:4: error: '<anonymous>' has incomplete type
> foo.cxx:4: error: invalid use of 'GLvoid'
>
> Compiles fine with 4.1.2 and 2.95.4.
>
You can patch GL/glu.h as e.g.
#ifdef __cplusplus
typedef void (*_GLUfuncptr)(void);
#else
typedef GLvoid (*_GLUfuncptr)(GLvoid);
#endif
I'm assuming that the line that now fails to compile in C++ is still valid C.
I'll admit, I don't really see the point to using a typedef for void.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32364
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c++/32364] Error from simple typedef/void combination
2007-06-16 4:38 [Bug c++/32364] New: Error from simple typedef/void combination skunk at iskunk dot org
2007-06-16 4:53 ` [Bug c++/32364] " pinskia at gcc dot gnu dot org
2007-08-15 19:08 ` craig dot powers at gmail dot com
@ 2007-08-15 19:13 ` craig dot powers at gmail dot com
2 siblings, 0 replies; 4+ messages in thread
From: craig dot powers at gmail dot com @ 2007-08-15 19:13 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from craig dot powers at gmail dot com 2007-08-15 19:13 -------
Looking at CVS for glu.h, the official patch is:
#ifdef __cplusplus
typedef GLvoid (*_GLUfuncptr)();
#else
...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32364
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2007-08-15 19:13 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2007-06-16 4:38 [Bug c++/32364] New: Error from simple typedef/void combination skunk at iskunk dot org
2007-06-16 4:53 ` [Bug c++/32364] " pinskia at gcc dot gnu dot org
2007-08-15 19:08 ` craig dot powers at gmail dot com
2007-08-15 19:13 ` craig dot powers at gmail dot com
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