cross platform - How to make CMake targeting multiple plattforms in a single build -


i'd configure cmake project in way, single build execution targets multiple platforms (in case i'd build linux , windows, x86_32 , x86_64 targets each). have cross compiler toolchains installed , working, , building each individual target works.

so challenge setting cmake in way, toolchain , cmake_system_… variables set appropriately each sub-build. how can that?

this not possible, in general.

cmake allows configuring single target platform @ once. if want target different platform, need re-run cmake scratch. true switching architectures when rest of toolchain remains same (for instance, cannot build x86 , x64 binaries @ same time).

the proper way automate have enclosing build script invokes cmake once each target platform , performs several out-of-source builds distinct binary directories. enclosing script written in cmake (the externalproject module works quite this), although general purpose scripting language python or bash might better fit.


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