build: Add more default errors

Newer gcc has `-Wincompatible-pointer-types`, hooray!
Add a few others that we pass today.

Closes: #618
Approved by: jlebon

diff --git a/configure.ac b/configure.ac
index cb1cc9808612aea7b0705800ce294103b422ae14..ff27b0a06dac36c7d75e6adfb750073a209f7dc1 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -29,6 +29,9 @@ CC_CHECK_FLAGS_APPEND([WARN_CFLAGS], [CFLAGS], [\
         -Werror=return-type \
         -Werror=overflow \
         -Werror=int-conversion \
+        -Werror=parenthesis \
+        -Werror=incompatible-pointer-types \
+        -Werror=misleading-indentation \
        -Werror=missing-include-dirs -Werror=aggregate-return \
        -Werror=declaration-after-statement \
 ])