Add flexelint

src/Makefile.am

@@ -42,3 +42,8 @@ dist_man_MANS = \
 
 .rst.1:
 	$(AM_V_GEN) $(RST2MAN) $< $@
+
+.PHONY: flint
+
+flint:
+	flexelint $(AM_CFLAGS) -I .. flint.lnt *.c

src/flint.lnt

+-efile(537, tbl*)
+-efile(451, tbl*)
+-efile(766, vmod_compat.h)
+
+-e717	// do ... while(0)
+
+-ecall(835, dlopen)
+-e801	// goto
+-ecall(840, VSB_bcat)
+-e793	// significant characters in an external identifier
+
+// we can not change external interfaces / code
+-efile(766, *_if.c)
+-emacro(776, RUP2)	// macro is not for int
+
+// must always be included to ensure sanity
+-efile(766, config.h)