libgweather renamed some files, see:
This causes problems when a package includes these files like:
while after the rename, "weather.h" would be "gweather-weather.h".
Downgrading from evolution-3.6.2-r1 to evolution-3.4.4 - fails because libgweather still has a newer version with the files renamed.
I grepped the gentoo tree for all dependencies on libgweather, then checked the packages for the problem.
Packages depending on libgweather:
Of these, only gnome-extra/gnome-clocks was unaffected.
Patches for the 4 affected packages are in this bug.
Changed the restriction on gnome-base/dconf, since it does not build with >v0.14, see bug #452648.
Bug #430856 - gnome-base/gnome-panel-184.108.40.206 - clock.c:55:40: fatal error: libgweather/gweather-prefs.h: No such file or directory
Bug #434612 - (eds-3.6) [TRACKER] gnome-extra/evolution-data-server-3.6 and dev-libs/libgweather-3.6
Steps to Reproduce:
1. emerge =mail-client/evolution-3.6.2-r1
2. emerge =mail-client/evolution-3.4.4
Compiling mail-client/evolution-3.4.4 fails with:
In file included from e-weather-source.c:21:0:
e-weather-source.h:28:33: fatal error: libgweather/weather.h: No such file or directory
mail-client/evolution-3.4.4 should depend on libgweather below v3.5, the change was between 3.4 and 3.5
Created attachment 336628 [details, diff]
Created attachment 336630 [details, diff]
Created attachment 336632 [details, diff]
Created attachment 336634 [details, diff]
Created attachment 336636 [details, diff]
Created attachment 336638 [details]
output of `emerge --info`
Created attachment 336640 [details]
output of `equery uses` for all the packages
This should be fixed if people doesn't mix different versions: if you use 3.6 or 3.8 versions for packages with that versions, it shouldn't be a problem