diff --git a/configure.ac b/configure.ac
index b7bd0009..0d11c2c5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -287,9 +287,12 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wbad-function-cast], [CWFLAGS="$CWFLAGS -Wbad-function-cast"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wcast-align], [CWFLAGS="$CWFLAGS -Wcast-align"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wcast-qual], [CWFLAGS="$CWFLAGS -Wcast-qual"])
+AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wduplicated-branches], [CWFLAGS="$CWFLAGS -Wduplicated-branches"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wduplicated-cond], [CWFLAGS="$CWFLAGS -Wduplicated-cond"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wfloat-equal], [CWFLAGS="$CWFLAGS -Wfloat-equal"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wformat=2], [CWFLAGS="$CWFLAGS -Wformat=2"])
+AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wlogical-op], [CWFLAGS="$CWFLAGS -Wlogical-op"])
+AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wmisleading-indentation], [CWFLAGS="$CWFLAGS -Wmisleading-indentation"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wmissing-declarations], [CWFLAGS="$CWFLAGS -Wmissing-declarations"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wmissing-prototypes], [CWFLAGS="$CWFLAGS -Wmissing-prototypes"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wnested-externs], [CWFLAGS="$CWFLAGS -Wnested-externs"])
@@ -300,6 +303,7 @@ AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wnull-dereference], [CWFLAGS="$CWFLAGS -Wnull-d
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wold-style-declaration], [CWFLAGS="$CWFLAGS -Wold-style-declaration"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wpointer-arith], [CWFLAGS="$CWFLAGS -Wpointer-arith"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wredundant-decls], [CWFLAGS="$CWFLAGS -Wredundant-decls"])
+AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wrestrict], [CWFLAGS="$CWFLAGS -Wrestrict"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wshorten-64-to-32], [CWFLAGS="$CWFLAGS -Wshorten-64-to-32"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wstrict-prototypes], [CWFLAGS="$CWFLAGS -Wstrict-prototypes"])
 AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wswitch-enum], [CWFLAGS="$CWFLAGS -Wswitch-enum"])