Merge commit '984e50e7'

* commit '984e50e7':
  build: Add -Wpedantic and -Wextra to extra warning flags
Merged-by: Clément Bœsch <u@pkh.me>

configure

@@ -6125,8 +6125,12 @@ check_cflags -Wmissing-prototypes
 check_cflags -Wno-pointer-to-int-cast
 check_cflags -Wstrict-prototypes
 check_cflags -Wempty-body
-enabled extra_warnings && check_cflags -Winline
-enabled extra_warnings && check_cflags -Wcast-qual
+
+if enabled extra_warnings; then
+    check_cflags -Wcast-qual
+    check_cflags -Wextra
+    check_cflags -Wpedantic
+fi
 
 check_disable_warning(){
     warning_flag=-W${1#-Wno-}