Don't use -Wabi compiler option

* configure.ac: Add -Wabi to the list of disabled warning
options.  For the details, see
http://lists.gnu.org/archive/html/emacs-devel/2018-08/msg00123.html.

diff --git a/configure.ac b/configure.ac
index c6101d635381da08307f4002bfaf04e8d69e186a..9542d441d74583848e526b7161cb3155b982d171 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -961,6 +961,7 @@ AS_IF([test $gl_gcc_warnings = no],
   nw="$nw -Wsync-nand"              # irrelevant here, and provokes ObjC warning
   nw="$nw -Wunsafe-loop-optimizations" # OK to suppress unsafe optimizations
   nw="$nw -Wbad-function-cast"      # These casts are no worse than others.
+  nw="$nw -Wabi"                    # Not useful, perceived as noise
 
   # Emacs doesn't care about shadowing; see
   # <https://lists.gnu.org/r/emacs-diffs/2011-11/msg00265.html>.