According to ACE-INSTALL.html there are two ways of building ACE, autoconf based and "traditional" GNU Make. The ebuild is using autoconf based build, but there is a line "emake static_libs=1" that is supposed to work only with GNU Make building. I'm attaching a proposed patch to allow use-based building of static libraries. Reproducible: Always
Created attachment 272297 [details, diff] Enable USE-based building of static libraries
Fixed in 5.8.3, thanks for your contribution commit 4f788f7b6020b41878554db4c696bba407e271fb Author: Sergey Popov <pinkbyte@gentoo.org> Date: Fri Aug 14 13:36:44 2015 +0300 dev-libs/ace: version bump, enable proper building of static libraries Gentoo-Bug: 305029 Gentoo-Bug: 366231 Package-Manager: portage-2.2.20