[Bug c/44598] -Wunused-variable miss 'static const char x[] = ;'

[dimhen at gmail dot com]

--- Comment #5 from dimhen at gmail dot com  2010-07-18 12:40 ---
'functions as designed'


-- 

dimhen at gmail dot com changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution||WONTFIX


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44598

[Bug c/44598] -Wunused-variable miss 'static const char x[] = ;'

[jakub at gcc dot gnu dot org]

--- Comment #4 from jakub at gcc dot gnu dot org  2010-06-21 06:11 ---
FYI, this has nothing to do with the new -Wunused-but-set-* warnings, the
initialization in the definition isn't counted as set.
This is something the old -Wunused-variable warning reports/doesn't report.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44598

[Bug c/44598] -Wunused-variable miss 'static const char x[] = ;'

[dimhen at gmail dot com]

--- Comment #2 from dimhen at gmail dot com  2010-06-20 07:32 ---
(In reply to comment #1)
Well...

1) so, gcc miss 'set-but-not-used' warning in testcase?
2) in testcase there are no more code to which 'x' may be inlined. Yes?
3) change test to
static const char x[] = ;
static const char const * b = ;

changes nothing in diagnistics
4) add -O3 -Wextra changes nothing in diagnistics


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44598

[Bug c/44598] -Wunused-variable miss 'static const char x[] = ;'

[manu at gcc dot gnu dot org]

--- Comment #3 from manu at gcc dot gnu dot org  2010-06-20 21:30 ---
I think we do not warn on purpose because unused global static const strings
are used often for storing version, metadata and stuff that may only be
conditionally compiled after preprocessing. I would argue we should not warn
for either case then.


-- 

manu at gcc dot gnu dot org changed:

   What|Removed |Added

 CC||manu at gcc dot gnu dot org,
   ||jakub at redhat dot com
 Status|UNCONFIRMED |NEW
 Ever Confirmed|0   |1
   Last reconfirmed|-00-00 00:00:00 |2010-06-20 21:30:30
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44598

[Bug c/44598] -Wunused-variable miss 'static const char x[] = ;'

[pinskia at gcc dot gnu dot org]

--- Comment #1 from pinskia at gcc dot gnu dot org  2010-06-20 00:37 ---
Well I think this is on purpose really.  In the array case, we can inline the
value while in the other case, b itself is not const so it can be changed; that
is be assigned to in normal code.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44598