[gdal-dev] GDAL code coverage

[Even Rouault]

Hi,

I experimented a bit gcov on GDAL to see the code coverage of the python 
autotest suite.

The result on my own GDAL tree (roughly latest trunk with some personnal 
changes) is available at : http://home.gdal.org/tmp/coverage.zip.

The output is not as nice as I would have wished as it was tricky to make the 
coverage report generator find the source files.

Here's the procedure I followed to generate the report :

1) Rebuild your GDAL tree with the GCC coverage options :
	CC="gcc --coverage" CXX="g++ --coverage" ./configure 'your_usual_options'
	make clean
	make
2) Run the autotest suite. This will generate .gcda files in the object 
directories of GDAL tree
3)  In $(GDAL_ROOT) : create a 'coverage' subdirectory
4)  In $(GDAL_ROOT) :
		lcov --directory . --capture --output-file ./coverage/gdal.info

	This will fail as lcov doesn't manage to find the source files. I had to add
	various symbolic links. The main steps are :
		cd $(GDAL_ROOT)/ogr/ogrsf_frmts/o
		for i in `find ../../.. -name "*.c*" | grep -v svn`; do ln -s $i; done
		for i in `find ../../.. -name "*.h*" | grep -v svn`; do ln -s $i; done
		ln -s ../geojson/jsonc .
		cd ..
		ln -s ili/iom
		cd $(GDAL_ROOT)/frmts/o
		for i in `find .. -name "*.c*" | grep -v svn`; do ln -s $i; done
		for i in `find .. -name "*.h*" | grep -v svn`; do ln -s $i; done
		ln -s ../pcraster/libcsf .
		ln -s ../gtiff/libtiff .
		ln -s ../gtiff/libgeotiff .
		ln -s ../grib/degrib18 .

Try 'lcov --directory . --capture --output-file ./coverage/gdal.info' and add 
all necessary symbolic links until this finally works

5) In $(GDAL_ROOT) : genhtml -o ./coverage --num-spaces 2 ./coverage/gdal.info

6) Enjoy ./coverage/index.html

If someone knows how to tell lcov how to find the source files where they 
really are instead of creating all those symbolic links that would be great !


Even