Peter,

There was indeed a PATH problem, xlC wan't being found.  Once corrected I ran the make check and this produced different errors.  I then ran make clean, reran the ./configure switching off all compiler optimization, and finally make check. Switching off compiler optimization didn't make any difference, make check failed on the same tests.

Attached is testsuite.log (as opposed to yesterday's test-suite.log).  For info, test 75 core dumped.

Jez