-Wmissing-parameter-type dnl
-Wshadow dnl
-Wno-gnu-folding-constant dnl
+ -Wsuggest-attribute=format dnl
+ -Wformat=2 dnl
dnl GCC enables this with -Wall in C++, and that generates a
dnl lot of warnings that have on average a low value to fix.
-Wno-sign-compare dnl