I updated the ebuild, patch and submitted it into sci overlay for testing.
http://git.overlays.gentoo.org/gitweb/?p=proj/sci.git;a=tree;f=dev-libs/libf2c;h=1fdeca7713a4136dcb63f5bc9a638414e3e03ea5;hb=25d4470fc06403b96309f588010764e6d0b3a776
dev-libs/libf2c is already in the tree, so if it is lacking a maintainer, then it should be assigned to maintainer-needed@g.o . However, the metadata.xml says that sci@g.o is the maintainer. is it not? then change the metadata.xml...
Now in main tree. Thanks!