By default, /usr/X11R6/lib/X11 /usr/X11/lib/X11 /usr/lib/X11 are added
if they exist at compile time
https://cgit.freedesktop.org/fontconfig/tree/configure.ac?id=b546940435ebfb0df575bc7a2350d1e913919c34#n502
We prefer isolation from base system

Remove the comment questioning about --add-default-font because we don't
add fonts for this reason and also because users can use a $FONTCONFIG
file.

aspell-en-dictionary, groonga-normalizer-mysql, file-msooxml, apache-antiloris are not shareable, they write files in other parts.

https://cgit.freedesktop.org/fontconfig/commit/?id=1ab5258f7c2abfafcd63a760ca08bf93591912da

fontconfig > 2.12.1 now requires gperf.

This reverts commit 38123b86.

fontconfig was not building any more on many machines (most testnode machines). Revert
until investigation is done.

https://patchwork.openembedded.org/patch/134994/

also revert "revert libXrender version because building cairo-1.10.2 failed."
also cleanup PKG_CONFIG_PATH.
also cleanup boost-lib recipe.

Use slapos provided libraries by defined include and rpath

This reverts commit 1ea46ea8.

Don't use squash because in this way we will lost the history.

Create components and software (automagically).
Some components are candidates to merge, some to remove.
Some components shall be stacks.