The proposed solution is in the tracker. If this is an autotools based package, and '--disable-silent-rules' doesn't work, you can try to add MAKEOPTS+=" V=1"
+ 30 Nov 2012; Sébastien Fabbro <bicatali@gentoo.org> -gwyddion-2.28.ebuild, + gwyddion-2.29.ebuild: + Verbose build log (bug #443084) +