• Masahiro Yamada's avatar
    kbuild: add %.lex.c and %.tab.[ch] to 'targets' automatically · b23d1a24
    Masahiro Yamada authored
    Files generated by if_changed* must be added to 'targets' to include
    *.cmd files.  Otherwise, they would be regenerated every time.
    
    The build system automatically adds objects to 'targets' where
    appropriate, such as obj-y, extra-y, etc. but does nothing for
    intermediate files.  So, each Makefile needs to add them by itself.
    
    There are some common cases where objects are generated by chained
    rules.  Lexers and parsers are compiled like follows:
    
       %.lex.o <- %.lex.c <- %.l
       %.tab.o <- %.tab.c <- %.y
    
    They are common patterns, so it is reasonable to take care of them
    in the core Makefile instead of requiring each Makefile to do so.
    
    At this moment, you cannot delete 'target += zconf.lex.c' in the
    Kconfig Makefile because zconf.lex.c is included from zconf.tab.c
    instead of being compiled separately.  It should be deleted after
    Kconfig is more refactored.
    Signed-off-by: 's avatarMasahiro Yamada <yamada.masahiro@socionext.com>
    Acked-by: 's avatarFrank Rowand <frowand.list@gmail.com>
    b23d1a24
Makefile 956 Bytes