Install this package:
emerge -a sci-physics/gosam
If the package is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask sci-physics/gosam
Or alternatively:
emerge --autounmask-write -a sci-physics/gosam
<pkgmetadata> <maintainer type="person"> <email>alexander@neuwirth-informatik.de</email> <name>Alexander Puck Neuwirth</name> </maintainer> <maintainer type="project"> <email>sci-physics@gentoo.org</email> <name>Gentoo Physics Project</name> </maintainer> <longdescription> GoSam is a general one-loop evaluator for matrix elements. The program produces Fortran 90 code from a given process description by evaluating Feynman diagrams and translating the associated one-loop diagrams into code suitable for the evaluation with Ninja, Golem95 and/or Samurai. </longdescription> <upstream> <remote-id type="github">gudrunhe/gosam</remote-id> </upstream> </pkgmetadata>