[Bug c/13029] New: static consts and -Wunused-variable

[mrs at apple dot com]

It was broken, then fixed in 3.3, then broken in 3.4...  The doc suggests this should not be a 
warning.

bash-2.05a$ cat /tmp/t.c
static const int kUnloadAndDeleteClient = 'N';
bash-2.05a$ ./xgcc -Wunused-variable -B./ /tmp/t.c -c -v
Reading specs from ./specs
Configured with: ../gcc-3.3/configure --enable-checking : (reconfigured) ../gcc-3.3/configure --
enable-checking : (reconfigured)  : (reconfigured)  : (reconfigured)  : (reconfigured)  : 
(reconfigured)  : (reconfigured) 
Thread model: single
gcc version 3.3.3 20031028 (prerelease)
 ./cc1 -quiet -v -iprefix ./../lib/gcc-lib/powerpc-apple-darwin6.3/3.3.3/ -isystem ./include -
D__GNUC__=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=3 -D__DYNAMIC__ /tmp/t.c -
fPIC -quiet -dumpbase t.c -auxbase t -Wunused-variable -version -o /var/tmp//ccmGfsFV.s
GNU C version 3.3.3 20031028 (prerelease) (powerpc-apple-darwin6.3)
        compiled by GNU C version 3.3 20030304 (Apple Computer, Inc. build 1435).
GGC heuristics: --param ggc-min-expand=51 --param ggc-min-heapsize=40960
ignoring nonexistent directory "../lib/gcc-lib/powerpc-apple-darwin6.3/3.3.3/include"
ignoring nonexistent directory "../lib/gcc-lib/powerpc-apple-darwin6.3/3.3.3/../../../../powerpc-
apple-darwin6.3/include"
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory "/usr/local/lib/gcc-lib/powerpc-apple-darwin6.3/3.3.3/include"
ignoring nonexistent directory "/usr/local/powerpc-apple-darwin6.3/include"
#include "..." search starts here:
#include <...> search starts here:
 include
 /usr/include
End of search list.
 as -o t.o /var/tmp//ccmGfsFV.s
bash-2.05a$ pushd +1
/Volumes/mrs3/net/gcc-darwin/gcc /tmp ~ /tmp /Volumes/mrs3/net/tot-34/gcc-darwin/gcc /
Volumes/mrs3/net/tot-preimport/gcc-darwin/gcc /tmp /Volumes/mrs3/net/gcc-3.3-obj/gcc
bash-2.05a$ ./xgcc -Wunused-variable -B./ /tmp/t.c -c -v
Reading specs from ./specs
Configured with: ../gcc/configure --enable-shared : (reconfigured)  : (reconfigured)  : 
(reconfigured) ../gcc/configure --enable-shared : (reconfigured)  : (reconfigured)  : (reconfigured)  
: (reconfigured)  : (reconfigured)  : (reconfigured)  : (reconfigured)  : (reconfigured)  : (reconfigured)  
: (reconfigured)  : (reconfigured)  : (reconfigured)  : (reconfigured)  : (reconfigured)  : (reconfigured)  
: (reconfigured)  : (reconfigured)  : (reconfigured) 
Thread model: posix
gcc version 3.4 20031112 (experimental)
 ./cc1 -quiet -v -iprefix /Volumes/mrs3/net/gcc-darwin/gcc/../lib/gcc/powerpc-apple-
darwin6.3/3.4/ -isystem ./include -D__DYNAMIC__ /tmp/t.c -fPIC -quiet -dumpbase t.c -auxbase 
t -Wunused-variable -version -o /var/tmp//ccQqVQU4.s
ignoring nonexistent directory "/Volumes/mrs3/net/gcc-darwin/gcc/../lib/gcc/powerpc-apple-
darwin6.3/3.4/include"
ignoring nonexistent directory "/Volumes/mrs3/net/gcc-darwin/gcc/../lib/gcc/powerpc-apple-
darwin6.3/3.4/../../../../powerpc-apple-darwin6.3/include"
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory "/usr/local/lib/gcc/powerpc-apple-darwin6.3/3.4/include"
ignoring nonexistent directory "/usr/local/lib/../powerpc-apple-darwin6.3/include"
#include "..." search starts here:
#include <...> search starts here:
 ./include
 /usr/include
End of search list.
GNU C version 3.4 20031112 (experimental) (powerpc-apple-darwin6.3)
        compiled by GNU C version 3.3 20030304 (Apple Computer, Inc. build 1435).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
/tmp/t.c:1: warning: 'kUnloadAndDeleteClient' defined but not used
 as -arch ppc -o t.o /var/tmp//ccQqVQU4.s

-- 
           Summary: static consts and -Wunused-variable
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: mrs at apple dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: powerpc-apple-darwin6.3
  GCC host triplet: powerpc-apple-darwin6.3
GCC target triplet: powerpc-apple-darwin6.3


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13029