Mozilla build detects the kernel version somewhere and uses a file in /var/tmp/portage/mozilla-1.4/work/mozilla/security/coreconf/ On linux 2.4 this is Linux2.4.mk, linux 2.5 uses Linux2.5.mk, but there is no Linux2.6.mk file needed to succesfully build mozilla with this detected kernel version. I didn't retry this since mozilla takes very very long to build. However i copied the Linux2.5.mk to Linux2.6.mk and ran ebuild mozilla-1.4.ebuild compile followed by ebuild mozilla-1.4 install and finally ebuild mozilla-1.4 qmerge to end up with a working mozilla :) Reproducible: Didn't try Steps to Reproduce:
Fixed in CVS