I built libtool on AIXv7.1, POWER7 using xlc compiler. The configure and make completed without error, but "make check" produced 4 errors. ==================================== 4 of 102 tests failed (4 tests were not run) See ./test-suite.log Please report to bug-libtool@gnu.org ==================================== I used the following configure command: LDFLAGS="-L/usr/local/lib" LIBS="-lmass" CXX=CC=xlc_r CFLAGS="-O2 -qtune=auto -qarch=auto -qcache=auto -I/usr/local/include" ./configure Here as requested in the error message, is the test-suite.log file. Jez Wain