t/README: Add a note about running commands under valgrind

The test suite runs valgrind with certain options activated. Add a
note saying how to run commands under the same conditions as the test
suite does.

Signed-off-by: Carlos Martín Nieto <cmn@elego.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/README b/t/README
index 78c9e6575c8a1f1060aada39dc5043eea807ac1c..d44a614ea32cf83915098e91ec7be603a13cb6d6 100644 (file)
--- a/t/README
+++ b/t/README
@@ -98,6 +98,13 @@ appropriately before running "make".
        not see any output, this option implies --verbose.  For
        convenience, it also implies --tee.
 
+       Note that valgrind is run with the option --leak-check=no,
+       as the git process is short-lived and some errors are not
+       interesting. In order to run a single command under the same
+       conditions manually, you should set GIT_VALGRIND to point to
+       the 't/valgrind/' directory and use the commands under
+       't/valgrind/bin/'.
+
 --tee::
        In addition to printing the test output to the terminal,
        write it to files named 't/test-results/$TEST_NAME.out'.