cmake used even when not building from source

[kripken]

I see this on travis in emscripten-core/emscripten#5087

Update complete, however skipped fetching the Emscripten tags, since git was not found.
If you want to compile one of the tagged releases from source, please install git using your package manager, see http://git-scm.com/book/en/Getting-Started-Installing-Git .
If you are not looking to build Emscripten from source, you can safely ignore this message.
Installing SDK 'sdk-tag-1.37.9-64bit'..
Installing tool 'clang-tag-e1.37.9-64bit'..
Downloading: /emsdk-portable/zips/llvm-e1.37.9.tar.gz from https://github.com/kripken/emscripten-fastcomp/archive/1.37.9.tar.gz
Unpacking '/emsdk-portable/zips/llvm-e1.37.9.tar.gz' to '/emsdk-portable/clang/tag-e1.37.9/src'
Downloading: /emsdk-portable/zips/clang-e1.37.9.tar.gz from https://github.com/kripken/emscripten-fastcomp-clang/archive/1.37.9.tar.gz
Unpacking '/emsdk-portable/zips/clang-e1.37.9.tar.gz' to '/emsdk-portable/clang/tag-e1.37.9/src/tools/clang'
Running CMake: ['cmake', '-G', 'Unix Makefiles', '-DCMAKE_BUILD_TYPE=RelWithDebInfo', '-DPYTHON_EXECUTABLE=/usr/bin/python', '-DLLVM_TARGETS_TO_BUILD=X86;JSBackend', '-DLLVM_INCLUDE_EXAMPLES=OFF', '-DCLANG_INCLUDE_EXAMPLES=OFF', '-DLLVM_INCLUDE_TESTS=OFF', '-DCLANG_INCLUDE_TESTS=OFF', '-DLLVM_ENABLE_ASSERTIONS=ON', '/emsdk-portable/clang/tag-e1.37.9/src']

It should just be getting the binary now, as reported on the mailing list, I think? Not sure why it's running cmake? (and is it downloading the sources too?)

[juj]

Ops sorry, this one skipped through my emails. I wonder if you were able to resolve this yet?

The issue here is that sdk-tag-1.37.9-64bit is an "compile-from-source" SDK. The precompiled SDKs don't have the word "tag" in them, so sdk-1.37.9-64bit is a precompiled one.

I agree that the naming is a bit odd. The way this is attempted to be clarified is when running ./emsdk list. That command categorizes SDKs under "compile-from-source" and "precompiled" headings to try to clarify.