gcc: construct use for warning was too recent.

diff --git a/configure.ac b/configure.ac
index c8236539ae867d5b57ee99953314853e8bc69241..2a9d655213cae2d15ab01b5197da5621ca16f440 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -45,7 +45,7 @@ AC_INIT(configure.ac)
 
     if test "$gccvernum" -ge "400"; then
             dnl gcc 4.0 or later
-            CFLAGS="$CFLAGS -Wextra -Werror=implicit-function-declaration"
+            CFLAGS="$CFLAGS -Wextra -Werror-implicit-function-declaration"
     else
             CFLAGS="$CFLAGS -W"
     fi