[Libreoffice] gnumake / dependencies 20%+ speedup ...
caolanm at redhat.com
Mon Sep 5 05:34:40 PDT 2011
On Mon, 2011-09-05 at 12:38 +0100, Michael Meeks wrote:
> I attach an updated cleanup.pl - that leaves the dummy rules, but
> removes duplicates in them
Hmm, these dependencies and the pseudo-rules are initially spit out by
gcc's -MP so...
a) I'd have expected gcc to list each dependency only once in the first
place per .c/.cxx file anyway.
b) And then I'd have expected it to then only emit one dummy rule per
dependency for those.
workdir/unxlngx6/Dep/CxxObject/sc/source/filter/excel/xepage.d I see
that for path/to/CxxObject/sc/source/filter/excel/xepage.o there is
already core/sc/inc/scdllapi.h listed twice as a dependency for
sc/source/filter/excel/xepage.o and correspondingly two pseudo rules for
Each pseudo-rule I *assume* is spat out by gcc on a one-to-one basis for
each dependency. So I wonder why gcc for e.g. xepage lists scdllapi.h
When we combine them together into the final library .d then we'd still
need dup-removal between the various constituent .d files alright.
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