Cannot compile DDD 3.2.1 (PannedGE.C:88: non-lvalue in unary `&')

[Andreas Zeller]

Hi!

Ilko Iliev <iliev@caretec.at> writes:

> I try to build ddd-3.2.1 on Linux RedHat 7.0
> 
> #./configure
> #make
> 
> c++  -DHAVE_CONFIG_H -DNDEBUG -O2 -g -W -Wall -trigraphs  -c -I. -I. -I./.. 
> -isystem /usr/X11R6/include -o PannedGE.o PannedGE.C
> PannedGE.C: In function `void __static_initialization_and_destruction_0
> (int, int)':
> PannedGE.C:88: non-lvalue in unary `&'
> make[1]: *** [PannedGE.o] Error 1
> make[1]: Leaving directory `/root/ddd-3.2.1/ddd'
> make: *** [all] Error 1
> 
> 
> What is wrong?

GCC 2.96 is.  This is fixed in the current GCC snapshot, but not
yet part of an official release.

In the meantime, try the following patch.  As soon as anyone confirms
this is working, I'll place it on the DDD Web page.

Index: PannedGE.C
===================================================================
RCS file: /cvsroot/ddd/ddd/ddd/PannedGE.C,v
retrieving revision 1.17
diff -c -2 -r1.17 PannedGE.C
*** PannedGE.C  1999/08/19 11:27:45     1.17
--- PannedGE.C  2000/11/30 09:23:15
***************
*** 86,90 ****
  // Class record initialization
  
! PannedGraphEditClassRec pannedGraphEditClassRec = {
    {    /* core fields */
      /* superclass               */  portholeWidgetClass,
--- 86,97 ----
  // Class record initialization
  
! // Use `struct _PannedGraphEditClassRec' here instead of 
! // the more appropriate `PannedGraphEditClassRec' due to a bug in GCC 2.96.
! // GCC 2.96 message is:
! // PannedGE.C: In function `void __static_initialization_and_destruction_0
! // (int, int)':
! // PannedGE.C:88: non-lvalue in unary `&'
! 
! struct _PannedGraphEditClassRec pannedGraphEditClassRec = {
    {    /* core fields */
      /* superclass               */  portholeWidgetClass,
Index: PannedGEP.h
===================================================================
RCS file: /cvsroot/ddd/ddd/ddd/PannedGEP.h,v
retrieving revision 1.10
retrieving revision 1.11
diff -c -2 -r1.10 -r1.11
*** PannedGEP.h 1999/08/19 11:27:45     1.10
--- PannedGEP.h 2000/11/22 11:40:24     1.11
***************
*** 3,6 ****
--- 3,7 ----
  
  // Copyright (C) 1995 Technische Universitaet Braunschweig, Germany.
+ // Copyright (C) 2000 Universitaet Passau, Germany.
  // Written by Andreas Zeller <zeller@gnu.org>.
  // 
***************
*** 55,59 ****
  } PannedGraphEditClassPart;
  
! typedef struct _GraphEditClassRec {
      CoreClassPart              core_class;
      CompositeClassPart         composite_class;
--- 56,60 ----
  } PannedGraphEditClassPart;
  
! typedef struct _PannedGraphEditClassRec {
      CoreClassPart              core_class;
      CompositeClassPart         composite_class;

-- 
Andreas Zeller     Universitaet Passau
                   http://www.fmi.uni-passau.de/st/staff/zeller/