gcc - gcov not generating gcda files

Question

I tried to run gcov with -fprofile-arcs & -ftest-coverage and nothing for linking.

It was giving this error:-

 hidden symbol `__gcov_init' in /home/mojave/tools/gcc-4.4.1/amd64/bin/../lib/gcc/x86_64-unknown-linux-gnu/4.4.1/libgcov.a(_gcov.o) is referenced by DSO

and program exits.

Command to compile-

bsub -g /mojave/build/"DummyDate" -J compile-obj/linux24rhel3_x86_64_GCOV64/DXp.o -I -q DFM -S 8192 -R "(model==OPTERON_250)" '/usr/bin/time --format="          ...finished DXp [`hostname`] [%E s with %P CPU]"  /home/mojave/tools/gcc-4.4.1/amd64/bin/g++ -fPIC -Wall -Wno-deprecated -DTCL_8_5 -m64 -march=opteron -DLITTLE_ENDIAN_PLATFORM -DARCH=amd64 -DARCH_amd64 -DARCH_BITS=64 -DARCH_BITS_64 -fsigned-char -msse3 -D__DISABLE_MULTITHREAD__ -D_CPP_NUMERIC_LIMITS -mfpmath=sse,387 -mmmx -m3dnow -pipe -Dgcc -DLICENSE_ALWAYS_GOOD -I/home/mojave/tools/flexlm/include/v8.4 -DNO_SUPPORT_STABIE -DGCOV -I../dxpclient -I/home/mojave/tools/bzip2-1.0.2/amd64/include -I/home/mojave/tools/zlib-1.2.3/amd64/include -I/home/mojave/tools/tcltk8.5.2/amd64//include -I/home/mojave/tools/tcltk8.5.2/amd64//include -g -fprofile-arcs -ftest-coverage -DBUILD_DATE=""UNSET"" -DVERSION_NUMBER="Dum.Dum.Dum.Dummy" -DEXT_VERSION_NUMBER="Dum.Dum.Dum.Dummy" -DLAST_RELEASE_VERSION="1.1614" -Wreturn-type -DTCL_8_5 -DGOOGLE_MALLOC -L../dx/linux24rhel3_x86_64_GCOV64/ -ldx -o obj/linux24rhel3_x86_64_GCOV64/DXp obj/linux24rhel3_x86_64_GCOV64/DXp.o -Wl -lgcov /home/mojave/tools/zlib-1.2.3/amd64/lib/libz.a  -L/home/mojave/tools/bzip2-1.0.2/amd64/lib -lbz2    -ldl'

Any help will be appreciated with vote up.

Thanks.

Answer 1

Compile with -fprofile-arcs and -ftest-coverage. Link with -lgcov during the generation of shared object. It will work.

Also you may use --coverage option as synonym for all three steps

Look at: gcc instrumentation options for more information