update documentation for make targets

diff --git a/doc/building b/doc/building
index 8481dd426555479dbe97823557dfc2a41c5b4fb3..020aa0deea1b7767a8568e71c364ea853e338b01 100644 (file)
--- a/doc/building
+++ b/doc/building
@@ -57,7 +57,10 @@ server:
        ./client-saved to prevent clashes with a running `make server`
 
 test:
-       build and run unittests
+       build and run tests
+
+unittest:
+       build and run tests that require no X server
 
 gdb, cachegrind, callgrind:
        build the binary suited for given tool and launch