Turn on more compiler warnings

* configure.ac: Enable gcc -Wwrite-strings.

diff --git a/configure.ac b/configure.ac
index 3a392aa20b669790bf8a32394adc441ef3ef1cb9..483694c136082d055fd9a5ece972b90296bad82e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -172,6 +172,7 @@ in the compilation directory.])
 fi
 
 gl_WARN_ADD([-Wall])
+gl_WARN_ADD([-Wwrite-strings])
 if test "x$opsys" = "xsunos4"
 then
        # SunOS 4.x header files don't declare int functions.