configure: Add -Wstrict-prototypes to CFLAGS if available.

diff --git a/configure b/configure
index 22735e7..f5a285e 100755 (executable)
--- a/configure
+++ b/configure
@@ -2992,6 +2992,7 @@ check_cflags -Wwrite-strings
 check_cflags -Wtype-limits
 check_cflags -Wundef
 check_cflags -Wmissing-prototypes
+check_cflags -Wstrict-prototypes
 enabled extra_warnings && check_cflags -Winline
 
 # add some linker flags