Your keyword was dropped
~sparc restored. There is no ChangeLog entry explaining why ~sparc was dropped in the first place, and the package builds and installs. One test is good, one won't compile because gcc-4.1 complains of a syntax error here: tests/Objects/objects1.cpp: sparc-unknown-linux-gnu-g++ -DHAVE_CONFIG_H -I../.. -O2 -mcpu=ultrasparc3 -pipe -D__GLX_ALIGN64 -Wall -Werror -DNDEBUG -MT objects1.o -MD -MP -MF .deps/objects1.Tpo -c -o objects1.o objects1.cpp cc1plus: warnings being treated as errors objects1.cpp: In function ‘int main(int, char**)’: objects1.cpp:30: warning: dereferencing type-punned pointer will break strict-aliasing rules objects1.cpp:42: warning: dereferencing type-punned pointer will break strict-aliasing rules This is caused by the -Werror CFLAG, and if you remove it, all the tests in test/Object pass. So, reassigning to the maintainer for resolution of how to treat the faulty syntax (or for removing -Werror).
tests fixed in portage. Thanks