Add support for optional sccache in build system #1177
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| --host=${CMAKE_SYSTEM_PROCESSOR}-none-eabi --build=${CMAKE_HOST_SYSTEM_PROCESSOR}-linux-gnu) | ||
| --host=${CMAKE_SYSTEM_PROCESSOR}-none-eabi | ||
| --build=${CMAKE_HOST_SYSTEM_PROCESSOR}-linux-gnu | ||
| "$<$<BOOL:${CMAKE_C_COMPILER_LAUNCHER}>:CC=${CMAKE_C_COMPILER_LAUNCHER} ${CMAKE_C_COMPILER}>" |
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doesn't cmake automatically prepend/use the CMAKE_C_COMPILER_LAUNCHER? why is this line necessary?
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Those flags are used during configuration of autotools projects like libwally. The way to enable a compiler wrapper there is to set CC="sccache gcc" when calling ./configure.
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good to know - pls add a comment 😄
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nevermind, i thought we were in a different CMakeLists.txt. It's in external/, so that's clear enough.
Sometimes when I jump back and forth between branches it rebuilts almost everything. And before pushing I would like to be able to call Especially when I'm dealing with cmake dependencies. I don't trust cmake so I do make clean between biulds. |
| --host=${CMAKE_SYSTEM_PROCESSOR}-none-eabi --build=${CMAKE_HOST_SYSTEM_PROCESSOR}-linux-gnu) | ||
| --host=${CMAKE_SYSTEM_PROCESSOR}-none-eabi | ||
| --build=${CMAKE_HOST_SYSTEM_PROCESSOR}-linux-gnu | ||
| "$<$<BOOL:${CMAKE_C_COMPILER_LAUNCHER}>:CC=${CMAKE_C_COMPILER_LAUNCHER} ${CMAKE_C_COMPILER}>" |
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good to know - pls add a comment 😄
sccache is a binary cache that wraps all calls to gcc/rustc and caches build output in
~/.cache. This speeds up a build aftermake cleanby about 3x. I choose not to put it in the dev dockerfile by default since caching might have unexpected side effects? But I put documentation in the build docs of how to install it.