[CMake] Manually-specified variables were not used by the project

Manually-specified variables were not used by the project MY_VAR when I call cmake -DMY_VAR= ... The goal is if(NOT DEFINED MY_VAR) ... else() ... if() in order to tell cmake over the command line what to do. How to achieve this ? -- Powered by www.kitware.com Please keep messages on-topi

[CMake] cmake + ccache -> cross-compile -> toolchain wrapper

How do you use cmake + ccache to cross compile in combination with a toolchain compiler wrapper (from crosstool-NG)? The situation: cross-compile for arm with a sdk + cmake + ccache The sdk installation $ sdk-dat-arm$ ll host/usr/bin/ arm-am3354-linux-gnueabihf-c++ -> ext-toolchain-wrapper* arm