Hi,

I've just started using distcc but "slightly" different then usual which uncovered an issue in makepkg i think.
I've set up distcc with zeroconf as that allows me to just use it without providing the hosts. To do that, i've added a profile.d file with the following contents:

export CC=/usr/lib/distcc/gcc
export CXX=/usr/lib/distcc/g++

Now if i compile something with cmake it cleanly picks up the CC and CXX lines and "automagically" starts using distcc.
But if i build a package using makepkg it's not using distcc at all. In makepkg i did set distcc:

BUILDENV=(distcc color !ccache check !sign)

but i did not set DISTCC_HOSTS as that should (like said) use zeroconf now.

While looking at the options in makepkg i find it strange that i can provide distcc and ccache in there specifically. I'd just yank those out and do whatever is provided in the CC and CXX environment variables. It would probably also simplify the makepkg script in that regard. Also, following whatever is in CC and CXX makes it future proof if someone starts to use some other distributed compilation package (icecc, for instance).

Please do test this before you change it. I did add:
export CC=/usr/lib/distcc/gcc
export CXX=/usr/lib/distcc/g++

to makepkg.conf and while that did use g++ from that path during makepkg, it did not actually trigger distcc (probably due to the fakeroot? don't know). It did trigger distcc when running cmake on that particular test project manually (i used Dolphin as test).