-Wno-unused -Wunused-value -Wunused-function \
-Wno-switch -Wno-char-subscripts -Wmissing-prototypes \
-Wdeclaration-after-statement -Wempty-body -Wmissing-parameter-type \
--Wold-style-declaration"
+-Wold-style-declaration -Wold-style-definition"
# Enable -Wno-format by default when using gcc on mingw since many
# GCC versions complain about %I64.