Hi,
I am using some '.am' include file(s) for each directory for features like:
* global: Provide '.h' files dependencies checking etc.
* subdirectories: Compile different types of .c files with different options.
(library part vs. non-UNIX code vs. library clients etc.)
Therefore I need to 'append' ('+=') to some "primaries"/options from included
'.am' filse although I cannot predict such "primary"/option is already defined
('=' or ':=') by our parent Makefile.am.
Currently I use empty pre-defines of all "primaries"/options used across the
project in one 'Makefile-head.am' to solve it. Unfortunately it creates big and
slow 'Makefile.in's scattered across the directories.
* Solution #0: It is not an option to optimize empty "primaries" out of
'Makefile.in's as they should remain overridable from make(1) command-line
even if set unconditionally as empty. I expect it would be possible to safely
omit them if even the corresponding 'EXTRA_$&' variable would be empty/unset.
* Solution #1: Introduce some 'AUTOMAKE_OPTIONS' item to permit '+=' without
preceding '=' or ':='.
Or did I miss something? Thanks for advice. Willing to possibly code it.
Regards,
Jan Kratochvil
--
Jan Kratochvil; Captive: free r/w NTFS Filesystem; http://www.jankratochvil.net/
