My source and build tree looks like this (see Makefile to put object files from source files different directories into a single, separate directory?) after a make (which builds and runs FooAndBarTests):
src
- Foo.cpp
- Bar.cpp
inc
- Foo.h
- Bar.h
test
- FooTest.cpp
- BarTest.cpp
- Main.cpp
- Makefile
- obj
- Foo.gcda
- Foo.gcno
- Bar.gcda
- Bar.gcno
- FooAndBarTests
UnitTest++
- libUnitTest++.a
- src
- ...
I can then produce .gcov files in the test directory by running gcov -o obj/ ../src/Foo.cpp
and gcov -o obj/ ../src/Bar.cpp
.
But if I run lcov -d obj/ -c -o FooAndBarTests.lcov
I get:
Capturing coverage data from obj/
Found gcov version: 4.2.1
Scanning obj/ for .gcda files ...
Found 4 data files in obj/
Processing Foo.gcda
../src/Foo.cpp:cannot open source file
Processing FooTest.gcda
FooTest.cpp:cannot open source file
../inc/Foo.h:cannot open source file
../UnitTest++/src/Checks.h:cannot open source file
...
And then when I run genhtml FooAndBarTests.lcov
I get:
Reading data file FooAndBarTests.lcov
Found 45 entries.
Found common filename prefix "/Users/dspitzer/FooAndBar/test"
Writing .css and .png files.
Generating output.
Processing file UnitTest++/src/Checks.h
genhtml: ERROR: cannot open /Users/dspitzer/FooAndBar/test/UnitTest++/src/Checks.h for reading!
How do I tell lcov and genhtml where the .cpp and .h files are?
Use the -b
option to lcov
. The -b
option specifies code base.