The original report from RMS stated:
"GCC 4 when compiling Emacs gives annoying warnings about
mismatched signs of pointer target types. To turn this
off is not trivial, since the -Wno-pointer-sign option
itself causes a diagnostic from older GCC versions.
It makes compilation fail."
Evidently changing Emacs is not an acceptable option.
After discussion with the SC and the original contributor
of the -Wpointer-sign patch, the SC agreed that
the best solution would be for -Wpointer-sign not to be
enabled by default, but only if -Wall or --pedantic is present.
Since the SC promised this fix to RMS, it needs to be considered
a release blocker for 4.1.
(I don't know about 4.0.3, probably best to do it there too).
--
Summary: -Wpointer-sign creates problems for Emacs
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jbuck at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25892
