With more than one compilation process, it can happen, that linking fails because the embedded V library is not yet completely compiled. Reproducible: Always
Please provide a failed build.log as example to assit the maintainer. Assigned to maintainer.
As you wish, I am attaching a build.log and an emerge--info. On my quad-core box, it is easiest to reproduce, with some other system load.
Created attachment 202190 [details] Log of the failed build search for /usr/lib/gcc/x86_64-pc-linux-gnu/4.3.4/../../../../x86_64-pc-linux-gnu/bin/ld: cannot find -lVx
Created attachment 202192 [details] output of emerge --info
-j1 forced in ebuild. *Please keep the bug open as long as the workaround is in place!* Using serial make is not a fix, but just a way to avoid users hitting the problem.
Created attachment 377274 [details] ponyprog-2.07c-r1.ebuild Revbumped ebuild: - EAPI 5 - epatch_user - this bug is fixed via adjusted *-build.patch(will be attached later)
Created attachment 377276 [details, diff] ponyprog-2.07c-build.patch Modified *-build.patch to fix parallel make issue
Fixed in CVS, thanks Sergey!