You receive this bug because this package does not respect my system's CC (x86_64-pc-linux-gnu-gcc) and calls directly /usr/bin/gcc(or similar) The possible solutions to fix this issue are: 1)Fix the buildsystem, if you can; 2)inherit toolchain-funcs and use tc-export CC 3)inherit toolchain-funcs and use emake CC="$(tc-getCC)" From the build log: gcc -I./src -I./epsobj -march=native -O2 -g0 -pipe -DX11 -DUNIX -DNONAG -Wall -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -fno-builtin -fno-common -Wcast-qual -Wwrite-strings -g -o ./epsobj/xnodll.o -c ./src/xnodll.c
+ 06 Sep 2013; Sergey Popov <pinkbyte@gentoo.org> +epstool-3.08-r1.ebuild: + Revision bump: EAPI 5, epatch_user, respect CC, wrt bug #475256. Thanks to + Agostino Sarubbo for discovering this issue