sci-mathematics/4ti2-1.6, and 1.6.2 also, fails to emerge at aclocal. I succeeded to install 4ti2-1.6 once on February, and the ebuild file hasn't changed.
Created attachment 376452 [details] build log
Created attachment 376454 [details] aclocal.out
Created attachment 376456 [details] emerge --info
I just tried on Mavericks and it worked flawlessly. The supposedly missing file ltoptions.m4 comes with libtool which you have installed according to your emerge --info. Can you please check that you have /usr/share/aclocal/ltoptions.m4 ?
Yes, I have ${EPREFIX}/usr/share/aclocal/ltoptions.m4 . Though I still haven't succeeded to install with emerge(1), I have 4ti2 installed with ebuild(1). So, even though I cannot reproduce the success with ebuild(1) since then, I understand this bug is resolved WORKSFORME.
reopening
I just tried again (on MacOS 10.9) and everything works for me. I have no clue, if somebody from the prefix team could try to reproduce / fix this it would be of great help.
hope it's ok to close this bug as worksforme
should be fixed; see bug 529404 for details