a $ genlop -it marble gives : ... Install date: Fri Oct 11 01:46:46 2013 USE="plasma -debug -designer-plugin -gps -+kde -python -shapefile -test -zip" CFLAGS="-O2 -march=native -pipe CXXFLAGS="-O2 -march=native -pipe LDFLAGS="-Wl,-O1 -Wl,--as-needed" CFLAGS and CXXFLAGS lacks a trailing "
https://github.com/gentoo-perl/genlop/pull/5 This pull request seems to have solved the issue with the missing \".
Fixed in 0.30.10