After a good build of gcc-4.5.1 I did $ make check-target-libstdc++-v3 and I get only one failure: Setting LD_LIBRARY_PATH to :/disk3/extsrc/gcc_build/gcc:/disk3/extsrc/gcc_build/x86_64-unknown-linux-gnu/./libstdc++-v3/../libgomp/.libs:/disk3/extsrc/gcc_build/x86_64-unknown-linux-gnu/./libstdc++-v3/src/.libs::/disk3/extsrc/gcc_build/gcc:/disk3/extsrc/gcc_build/x86_64-unknown-linux-gnu/./libstdc++-v3/../libgomp/.libs:/disk3/extsrc/gcc_build/x86_64-unknown-linux-gnu/./libstdc++-v3/src/.libs:/disk3/extsrc/gcc_build/./gmp/.libs:/disk3/extsrc/gcc_build/./prev-gmp/.libs:/disk3/extsrc/gcc_build/./mpfr/.libs:/disk3/extsrc/gcc_build/./prev-mpfr/.libs:/disk3/extsrc/gcc_build/./mpc/.libs:/disk3/extsrc/gcc_build/./prev-mpc/.libs:/disk3/extsrc/gcc_build/x86_64-unknown-linux-gnu/libstdc++-v3/.libs:/disk3/extsrc/gcc_build/x86_64-unknown-linux-gnu/libmudflap/.libs:/disk3/extsrc/gcc_build/x86_64-unknown-linux-gnu/libssp/.libs:/disk3/extsrc/gcc_build/x86_64-unknown-linux-gnu/libgomp/.libs:/disk3/extsrc/gcc_build/./gcc:/disk3/extsrc/gcc_build/./prev-gcc 4.exe: /disk3/extsrc/gcc-4.5.1/libstdc++-v3/testsuite/22_locale/time_get/get_date/wchar_t/4.cc:54: void test01(): Assertion `errorstate == ios_base::eofbit' failed. FAIL: 22_locale/time_get/get_date/wchar_t/4.cc execution test I am investigating but wonder if anyone has experienced that failure and has a solution. I am finding several undocumented factors (including LD_LIBRARY_PATH and some configuration options that are not easily found) that have an influence on successfully testing libstdc++ and plan to propose doc changes. Thanks. -Tom Thomas M. Browder, Jr. Niceville, Florida USA