On my ~x86 machine, after upgrading libtool from 1.5.26 to 2.2.4 (both of which are in the 1.5 slot), guile needed to be rebuilt due to linking errors (note that it might have been something else that caused the linking error, but I'm not sure what, only that I just rebuilt libtool this morning). However, it comes out with the following error:
libtoolize: AC_CONFIG_MACRO_DIR([m4]) conflicts with ACLOCAL_AMFLAGS=-I guile-config.
Since last rebuilding guile, I have also upgraded automake:1.10 from 1.10.1 to 1.10.1-r1.
I have the following USE flags enabled for guild: deprecated nls regex threads
same bug on ~amd64
*** This bug has been marked as a duplicate of bug 212723 ***