-# We cannot rely on BUILT_SOURCES here as other built sources are relying
-# on vppapigen, so make can start compiling lex.c before gram.h is created.
-# This way we introduce new dependency by running C preprocessor.
-
-tools/vppapigen/lex_e.c: tools/vppapigen/lex.c tools/vppapigen/gram.y