How to Build Debug and Release Targets with CMake in GCC?

Debugging and Releasing with CMake in GCC-compiled Projects

Question 1: Running CMake for Debug and Release Targets

In an out-of-source build workflow, navigate to the project root, create separate directories for Debug and Release builds:

mkdir Release
mkdir Debug

Then, in each directory, run CMake with the appropriate build type:

cd Release
cmake -DCMAKE_BUILD_TYPE=Release ..

cd Debug
cmake -DCMAKE_BUILD_TYPE=Debug ..

Question 2: Specifying Debug and Release Flags

CMake provides default flags for different build configurations, including Release and Debug. These flags are automatically applied. If needed, you can modify or add to these flags using a toolchain file. For example:

set(CMAKE_CXX_FLAGS_DEBUG_INIT "-Wall")
set(CMAKE_CXX_FLAGS_RELEASE_INIT "-Wall")

Question 3: Compiling Executable and Library with Different Compilers

CMake should automatically detect and use the appropriate compiler for different source files based on their extension (e.g., .cpp for C files). It's not clear from your question what specific need you have for specifying different compilers for different targets.

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