Automake flex output naming

问题

If if use, for example

foo_SOURCES = bar.l

then, automake generates via flex file bar.c. But, if I provide prefix AM_LFLAGS=-Psome_prefix, it generates lex.some_prefix.c, which is not known by other compilation rules, so it fails with bar.c: No such file or directory. Where is my mistake and how can I work around it? I really need prefix.

回答1:

I think the only way around this is to write your own rule for the .l->.c translation. Something like:

x_SOURCES = lex.some_prefix.c
lex.some_prefix.c: lex.l
    ... rule here

You may also need a tweak to ensure you distribute the .l file.

来源：https://stackoverflow.com/questions/12569547/automake-flex-output-naming