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Avoid loading toolchain file multiple times to avoid confusing ccache (#39387)

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During first run of cmake the toolchain file will be loaded twice,
- /usr/share/cmake-3.23/Modules/CMakeDetermineSystem.cmake
- /bld/CMakeFiles/3.23.2/CMakeSystem.cmake

But once you already have non-empty cmake cache it will be loaded only
once:
- /bld/CMakeFiles/3.23.2/CMakeSystem.cmake

This has no harm except for double load of toolchain will add
--gcc-toolchain multiple times that will not allow ccache to reuse the
cache.

Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
This commit is contained in:
Azat Khuzhin 2022-07-21 02:26:28 +03:00 committed by GitHub
parent 3b755ffb2a
commit 40d5627510
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 16 additions and 0 deletions
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16
cmake/linux/toolchain-x86_64.cmake
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@ -1,3 +1,19 @@
if (_CLICKHOUSE_TOOLCHAIN_FILE_LOADED)
# During first run of cmake the toolchain file will be loaded twice,
# - /usr/share/cmake-3.23/Modules/CMakeDetermineSystem.cmake
# - /bld/CMakeFiles/3.23.2/CMakeSystem.cmake
#
# But once you already have non-empty cmake cache it will be loaded only
# once:
# - /bld/CMakeFiles/3.23.2/CMakeSystem.cmake
#
# This has no harm except for double load of toolchain will add
# --gcc-toolchain multiple times that will not allow ccache to reuse the
# cache.
return()
endif()
set (_CLICKHOUSE_TOOLCHAIN_FILE_LOADED ON)
set (CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
set (CMAKE_SYSTEM_NAME "Linux")