Hi, Runing one test can be done with GCC and the following process: $ make clean $ export CC="gcc -fprofile-arcs -ftest-coverage"; ./config enable-unit-test $ make depend $ make $ make TESTS="test_cms" test $ make TESTS=test_heartbeat test However, on AIX, I'm using xlC, which does not provide the -fprofile-arcs -ftest-coverage options. So, it seems that I only can run ALL the tests. Is there another solution for running one test that does not depend on GCC ? If not, shouldn't the unit testing of OpenSSL use a GCC-independent mechanism so that running one test is possible without GCC ? Where is the page explaining how to unit test in details ? I haven't been able to find it, only hints on the Web, and general ideas on OpenSSL wiki pages but no details. Thanks Cordialement, Tony Reix Bull - ATOS IBM Coop Architect & Technical Leader Office : +33 (0) 4 76 29 72 67 1 rue de Provence - 38432 ?chirolles - France www.atos.net<https://mail.ad.bull.net/owa/redir.aspx?C=PvphmPvCZkGrAgHVnWGsdMcDKgzl_dEIsM6rX0g4u4v8V81YffzBGkWrtQeAXNovd3ttkJL8JIc.&URL=http%3a%2f%2fwww.atos.net%2f> -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20160203/86d70a04/attachment.html>