Re: [png-mng-implement] libpng-config is SYSROOT-unaware.

[John B. <jb...@fr...>]

From: Glenn Randers-Pehrson [mailto:gl...@gm...] 
>The bugtrack reporter also supplied a patch, which merely changes the
>--prefix output from ${prefix} to ${SYSROOT}${prefix}.  That looks
>harmless enough, but I don't see how that would help the
>application builder find the right libraries (e.g., libz) to use in
>the build.  I'd think the -L and -I info might also need to
>account for $SYSROOT.

That is in the patch too.  I have doubts about the wisdom of installing a system file with a floating, potentially undefined, environment variable.  It seems to me that /usr/bin/libpng-config should not depend on the setting of $SYSROOT in the user's environment.

What I'm not sure about are the real requirements for SYSROOT.  OpenEmbedded mailing lists have this thread from over two years ago:

http://projects.linuxtogo.org/pipermail/openembedded-devel/2007-September/003037.html

OE is using pkg-config and libpng.pc; not libpng-config.

I have to ask whether the cross-compilation requirement for libpng-config, as opposed to libpng.pc, is really worth the risk of imposing an embedded environment variable on everyone.

John Bowler <jb...@ac...>