check_add_cflags -Wimplicit-function-declaration
check_add_cflags -Wuninitialized
check_add_cflags -Wunused-variable
- check_add_cflags -Wunused-but-set-variable
+ check_add_cflags -Wunused-but-set-variable
enabled extra_warnings || check_add_cflags -Wno-unused-function
fi