sources target and pc-files

[Mike Frysinger]

the misc/Makefile.in has sources depend on pc-files.  i can't see why this 
would 
be needed.  could you clarify ?

the issue is that if you run:
        ./configure --enable-pc-files
        make sources
        make
        make install
you get a build failure due to no .pc files being in misc/

this is because the misc/gen-pkgconfig script is run when processing the pc-
files target, and it only generates .pc files for libraries that have been 
compiled in ../lib/*.  since we haven't compiled anything yet, there is 
nothing in ../lib/, so no .pc files are created, and then the Makefile does 
"touch pc-files" to prevent running it again.

possible solutions:
 - don't have "sources" depend on "pc-files" (i don't see why it does now)
        - con: .pc files still don't get regenerated when $version or libs 
change
 - don't have the pc-files target `touch address@hidden
        - con: .pc files will always get refreshed (but maybe that's fine)
                - easy enough to add a `cmp` to the gen-pkgconfig to avoid this

i'm leaning towards the latter solution ...
-mike

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