debug build on linux

[pholklore]

Hi guys. I'm feeling retarded.

I've never used cmake before, and even after a while of web searching, I'm still missing something probably obvious.

WTH is the equivalent of `/path/to/src/configure CFLAGS="-g3 -O0" ' with cmake ?

I'm trying to build a debug version of dolphin on linux.

---

Found it, I think. Apparently it's:

$ cmake -DCMAKE_BUILD_TYPE=Debug -DCMAKE_C_FLAGS_DEBUG="-g3 -O0" -DCMAKE_CXX_FLAGS_DEBUG="-g3 -O0" ..

Though debug build type doesn't link currently. (is it supposed to, or nobody uses that mode?)

In release build type, this built fine:

$ cmake -DCMAKE_C_FLAGS="-g3 -O0" -DCMAKE_CXX_FLAGS="-g3 -O0" ..

Phew...

[neobrain]

Debug build is broken on Linux if you don't have wx debug libraries installed.
As a workaround, you can add "-gddb" to your CMAKE_CXX_FLAGS with a Release build. That will at least enable some debugging functionality.

[neobrain]

Fwiw, you can change your CMAKE_CXX_FLAGS by modifying CMakeCache.txt after having run cmake and then rerunning cmake.

[pholklore]

Thanks. Meanwhile I also found -DFASTLOG=ON. Any other option I should be enabling? I'm trying to debug real wiimote stuff (trying to figure out why my el-cheapo wiimote doesn't work in-game.)

[neobrain]

-ggdb was enough for me, but my debugging requirements usually aren't particularly high.

[pholklore]

I found out that -DCMAKE_CXX_FLAGS_RELEASE="-g3 -O0" is better than -DCMAKE_CXX_FLAGS="-g3 -O0", because CMAKE_CXX_FLAGS_RELEASE is expanded after CMAKE_CXX_FLAGS on the compiler command invocation, and CMAKE_CXX_FLAGS_RELEASE defaults to -O3, thus one gets:

Code:

$CC ... -g -O0 ... -O3 ...

which loses the -O0. I'm currently using:

Code:

cmake -DCMAKE_INSTALL_PREFIX=/opt -DCMAKE_C_FLAGS_RELEASE="-g3 -O0" -DCMAKE_CXX_FLAGS_RELEASE="-g3 -O0" -DFASTLOG=ON ..