protobuf-c tries to test protoc_c as part of its build.
Created attachment 381758 [details, diff] Patch for protobuf-c-1.0.0_rc2.ebuild This disables tests with a USE flag
The testing is being performed in the compile phase, not the test phase.
should be all set now in the tree; thanks for the report! Commit message: Fix cross-compiling http://sources.gentoo.org/dev-libs/protobuf-c/files/protobuf-c-1.1.0-no-build-tests.patch?rev=1.1 http://sources.gentoo.org/dev-libs/protobuf-c/protobuf-c-1.1.0.ebuild?r1=1.1&r2=1.2