build: Don't warn about 'long long'.

Various language bindings simply need this, so we have to allow
it even though it's a GCC extension.
(cherry picked from commit 0c0976496dafda4d172c5a7fc787d6a87d5bce8d)

diff --git a/configure.ac b/configure.ac
index f0384a5..55caf0a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -114,6 +114,8 @@ if test "$gl_gcc_warnings" = yes; then
   nw="$nw -Wunsafe-loop-optimizations" # just a warning that an optimization
                                     # was not possible, safe to ignore
   nw="$nw -Wpacked"                 # Allow attribute((packed)) on structs
+  nw="$nw -Wlong-long"              # Allow long long since it's required
+                                    # by Python, Ruby and xstrtoll.
 
   gl_MANYWARN_ALL_GCC([ws])
   gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])