dnl else. If for any reason you need to force a recheck, just change
dnl MAYBE_WARN in an ignorable way (like adding whitespace)
-MAYBE_WARN="-Wall -Wextra \
+MAYBE_WARN="-Wall -Wextra -Wundef \
-Wsign-compare -Werror-implicit-function-declaration \
-Wpointer-arith -Wwrite-strings -Wstrict-prototypes \
-Wmissing-prototypes -Wmissing-declarations -Wnested-externs \
endif
warn_c_args = []
-foreach a : ['-Wall', '-Wextra', '-Wsign-compare',
+foreach a : ['-Wall', '-Wextra', '-Wsign-compare', '-Wundef',
'-Werror-implicit-function-declaration', '-Wpointer-arith',
'-Wwrite-strings', '-Wstrict-prototypes', '-Wmissing-prototypes',
'-Wmissing-declarations', '-Wnested-externs', '-Wpacked',