tests: factor duplicate expected warnings

[bison.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index e6ef8baf91a3877b0e255816fc3a76f2a42d9228..df5670cd5d7167b4f6762c270e1577550028671f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -91,7 +91,7 @@ if test "$enable_gcc_warnings" = yes; then
   # -fno-color-diagnostics: Clang's use of colors in the error
   # messages is confusing the tests looking at the compiler's output
   # (e.g., synclines.at).
-  warn_tests='-Wundef -pedantic -fno-color-diagnostics'
+  warn_tests='-Wundef -pedantic -Wsign-compare -fno-color-diagnostics'
 
   AC_LANG_PUSH([C])
   # Clang supports many of GCC's -W options, but only issues warnings