configure: Enable -Wvla if available.

configure

@@ -13695,6 +13695,31 @@ $as_echo "$ac_cv_cflags__Wunused_but_set_parameter" >&6; }
 if test "x$ac_cv_cflags__Wunused_but_set_parameter" = xyes; then :
   EXTRACFLAGS="$EXTRACFLAGS -Wunused-but-set-parameter"
 fi
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -Wvla" >&5
+$as_echo_n "checking whether the compiler supports -Wvla... " >&6; }
+if ${ac_cv_cflags__Wvla+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_wine_try_cflags_saved=$CFLAGS
+CFLAGS="$CFLAGS -Wvla"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+int main(int argc, char **argv) { return 0; }
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_cflags__Wvla=yes
+else
+  ac_cv_cflags__Wvla=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+CFLAGS=$ac_wine_try_cflags_saved
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cflags__Wvla" >&5
+$as_echo "$ac_cv_cflags__Wvla" >&6; }
+if test "x$ac_cv_cflags__Wvla" = xyes; then :
+  EXTRACFLAGS="$EXTRACFLAGS -Wvla"
+fi
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the compiler supports -Wwrite-strings" >&5
 $as_echo_n "checking whether the compiler supports -Wwrite-strings... " >&6; }
 if ${ac_cv_cflags__Wwrite_strings+:} false; then :

configure.ac

@@ -1780,6 +1780,7 @@ then
   WINE_TRY_CFLAGS([-Wstrict-prototypes])
   WINE_TRY_CFLAGS([-Wtype-limits])
   WINE_TRY_CFLAGS([-Wunused-but-set-parameter])
+  WINE_TRY_CFLAGS([-Wvla])
   WINE_TRY_CFLAGS([-Wwrite-strings])
 
   dnl Check for noisy string.h