silence format-signness warnings in gcc5

diff --git a/configure.ac b/configure.ac
index 3f7ec24943d9dbd1eb82acfff91995bfdad06fc9..7334b9378bd65280b4be5535514501aa6fac484e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -306,6 +306,7 @@ if test "$gl_gcc_warnings" = yes; then
   nw="$nw -Woverlength-strings"     # We use some in tests/
   nw="$nw -Wvla"                    # There is no point to avoid C99 variable length arrays
   nw="$nw -Wformat-nonliteral"      # Incompatible with gettext _()
+  nw="$nw -Wformat-signedness"      # Too many to handle
   nw="$nw -Wstrict-overflow"
   nw="$nw -Wmissing-noreturn"
   nw="$nw -Winline"                 # Too compiler dependent