sci-libs/dsdp comes with some headers but they aren't installed: equery f dsdp * Searching for dsdp ... * Contents of sci-libs/dsdp-5.8: /usr /usr/lib /usr/lib/debug /usr/lib/debug/usr /usr/lib/debug/usr/lib64 /usr/lib/debug/usr/lib64/libdsdp.so.5.debug /usr/lib64 /usr/lib64/libdsdp.so -> libdsdp.so.5 /usr/lib64/libdsdp.so.5 /usr/share /usr/share/doc /usr/share/doc/dsdp-5.8 After fixing cvxopt configuration I discovered that the compilation of the dsdp extension (controlled by a +dsdp useflag) is failing because of missing headers in bug #399029
fixed in cvs. thanks.