pkg-config-lite

[LRN]

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On 19.03.2012 22:51, Oliver Lange wrote:
> 
> Howdy,
> 
> pkg-config 0.26 without glib dependency:
> 
> http://sourceforge.net/projects/pkgconfiglite/
> 
> Maybe you want to check this out. It shows how little code from
> glib is required by pkg-config. It has no dependencies (other than
> libc).
> 
> Changes are minor and maybe you'd like to take over?
> 
It sounds cool, but pkg-config-0.26 (or was it 0.25?) actually REMOVED
a built-in copy of glib-1.2 that was used to avoid circular dependency
and to make pkg-config self-contained.
It barely worked on Windows - i was able to fix it up by transplanting
quite a bit of mangled glib-2.x source code into it, but that just
shows that pkg-config IS dependent on glib-2, and tapping that
dependency can bring benefits (again, if the dependency is not used
extensively at the moment, it's because the transition is still fresh
enough).

That is, making pkg-config self-contained that way most likely goes in
a direction opposite the one pkg-config is moving in.

Circular dependency between pkg-config and glib is easy to avoid
(assuming that ${prefix} is set to prefix, usually "/mingw"):
save_exec_prefix=${exec_prefix}
save_libdir=${libdir}
save_includedir=${includedir}
save_IFS=$IFS
IFS=$(echo -en "\n\b")
for l in $(cat /mingw/lib/pkgconfig/libffi.pc | sed -n -e
'/\(exec_prefix\|libdir\|includedir\)=/p' -e
's/Libs:\(.\+\)/LIBFFI_LIBS="\1"/ p' -e
's/Cflags:\(.\+\)/LIBFFI_CFLAGS="\1"/ p')
do
  eval $l
done
IFS=$save_IFS
<configure glib>
exec_prefix=${save_exec_prefix}
libdir=${save_libdir}
includedir=${save_includedir}

That is, glib only needs pkg-config to find libffi, and this one time
we can just point the proverbial finger...
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