path: root/cmake/
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authorAlexandru Croitor <>2021-09-24 17:06:02 +0200
committerAlexandru Croitor <>2021-09-27 18:29:44 +0200
commit5d840f0f7a575a5163800519d7ef7d4ba228135a (patch)
treeba4d8ed8f4e67a2ad41794cab6463d1af82d086f /cmake/
parentc7d9e05a2bd55f03a01b5319338828197e81bc39 (diff)
CMake: Get toolchain file path from EMSDK env for Wasm user projects
Try to to chainload the emscripten CMake toolchain file from the EMSDK env var if it is set, instead of requiring the user to explicitly specify a path to the file via QT_CHAINLOAD_TOOLCHAIN_FILE. The order in which the toolchain file is chainloaded becomes is as follows: 1) The initial toolchain file path that was specified when configuring qtbase is set written as the initial value of __qt_chainload_toolchain_file in qt.toolchain.cmake 2) If EMSDK env var is set, it overrides the value from 1) 3) If QT_CHAINLOAD_TOOLCHAIN_FILE cache var is supplied it overrides the value from 2) Whichever value ends up in __qt_chainload_toolchain_file is checked too see if the file exists. If it exists it gets included, if it doesn't, a warning is issued. This checking logic is a bit crude and should be improved and unified with the Android chainload checking, but the current change already improves the behavior for users of Qt. Pick-to: 6.2 Task-number: QTBUG-96843 Change-Id: I5da58a329f659086aaaee765c9399d0369021b22 Reviewed-by: Joerg Bornemann <>
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