build: enable -Wshadow by default

Signed-off-by: Øyvind Harboe <oyvind.harboe@zylin.com>

diff --git a/configure.in b/configure.in
index d93b21ad7b2cc7582958f93f5df2329206d488d1..7f31e1deacd533c256d3fe04bd3c50304b624941 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -1090,7 +1090,7 @@ fi
 AC_DEFINE([_GNU_SOURCE],[1],[Use GNU C library extensions (e.g. stdndup).])
 
 # set default gcc warnings
-GCC_WARNINGS="-Wall -Wstrict-prototypes -Wformat-security"
+GCC_WARNINGS="-Wall -Wstrict-prototypes -Wformat-security -Wshadow"
 if test "${gcc_wextra}" = yes; then
   GCC_WARNINGS="${GCC_WARNINGS} -Wextra -Wno-unused-parameter"
   GCC_WARNINGS="${GCC_WARNINGS} -Wbad-function-cast"