How to use gprof with cmake

cmake profiling gprof dreal
Phdetermined picture Phdetermined · Oct 21, 2014 · Viewed 20.1k times · Source

I have looked at dozens of tutorials for profiling with gprof. I'm trying to work with code for the SMT solver dReal. To build the program, I first installed g++-4.8, Bison, Flex, and Cmake. Then to build dReal, the instructions said to execute the following:

git clone [email protected]:soonhokong/dReal.git dreal  
cd dreal  
mkdir -p build/release  
cd build/release  
cmake -DCMAKE_BUILD_TYPE=RELEASE -DCMAKE_CXX_COMPILER=g++-4.8 -DCMAKE_C_COMPILER=gcc-4.8 ../../src  
make

Where in here am I supposed to add the -pg? I'm new to programming, so reasoning as opposed to an answer would be much appreciated. I know you're supposed to add the -pg to the compilation stage but all the tutorials say to put it after g++ or gcc. I can't find how to modify the code for cmake. I did try changing the build type to PROFILE but that didn't help.

Answer

zzmp picture zzmp · Dec 2, 2016

In order to use gprof, you need to both compile and link with the -pg option.

CMakeLists.txt should have a setup like Ami Tavory mentioned, where command line options are combined with hardcoded options, so a good way to do this with a well built cmake project is:

cmake -DCMAKE_CXX_FLAGS=-pg -DCMAKE_EXE_LINKER_FLAGS=-pg -DCMAKE_SHARED_LINKER_FLAGS=-pg <SOURCE_DIR>

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