It generates false alarms in doc.c, regex.c, xdisp.c. See
<http://lists.gnu.org/archive/html/emacs-devel/2012-09/msg00040.html>.
2012-09-03 Paul Eggert <eggert@cs.ucla.edu>
+ * configure.ac (WARN_CFLAGS): Omit -Wjump-misses-init.
+ It generates false alarms in doc.c, regex.c, xdisp.c. See
+ <http://lists.gnu.org/archive/html/emacs-devel/2012-09/msg00040.html>.
+
Merge from gnulib, incorporating:
2012-08-29 stdbool: be more compatible with mixed C/C++ compiles
2011-11-30 manywarnings: update the list of "all" warnings
nw="$nw -Wswitch-default" # Too many warnings for now
nw="$nw -Wfloat-equal" # warns about high-quality code
nw="$nw -Winline" # OK to ignore 'inline'
+ nw="$nw -Wjump-misses-init" # We sometimes safely jump over init.
nw="$nw -Wsync-nand" # irrelevant here, and provokes ObjC warning
nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations