Hello Ludovic, Simon, * Ludovic Courtès wrote on Tue, Oct 28, 2008 at 05:48:12PM CET: > > Let me explain this. Suppose you have tests T1 and T2: > > * T1 uses code from foo.c and t1.c; > * T2 uses code from foo.c and t2.c. > > Running "make check" runs T1, then T2: > > * T1 is run, producing foo.gcda and t1.gcda; > * T2 is run, *overriding* foo.gcda and producing t2.gcda. > > In the end, `lcov' is fed with foo.gcda from the T2 run, whereas what we > really want to have is the code covered in foo.c by T1 *and* T2.
That's not what my GCC documentation says (info gcc 'Invoking Gcov', near the end): The execution counts are cumulative. If the example program were executed again without removing the `.gcda' file, the count for the number of times each line in the source was executed would be added to the results of the previous run(s). [...] FWIW, IIRC then the directory handling of the files was only fixed to be sane rather recently in the GCC tree (I guess 4.4 only). Cheers, Ralf
