ClickHouse/PreLoad.cmake

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CMake
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# Use Ninja instead of Unix Makefiles by default.
# https://stackoverflow.com/questions/11269833/cmake-selecting-a-generator-within-cmakelists-txt
#
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# Reason: it has better startup time than make and it parallelizes jobs more uniformly.
# (when comparing to make with Makefiles that was generated by CMake)
#
# How to install Ninja on Ubuntu:
# sudo apt-get install ninja-build
# CLion does not support Ninja
# You can add your vote on CLion task tracker:
# https://youtrack.jetbrains.com/issue/CPP-2659
# https://youtrack.jetbrains.com/issue/CPP-870
if (NOT DEFINED ENV{CLION_IDE} AND NOT DEFINED ENV{XCODE_IDE})
find_program(NINJA_PATH ninja)
if (NINJA_PATH)
set(CMAKE_GENERATOR "Ninja" CACHE INTERNAL "" FORCE)
endif ()
endif()
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# Default toolchain - this is needed to avoid dependency on OS files.
execute_process(COMMAND uname -s OUTPUT_VARIABLE OS)
execute_process(COMMAND uname -m OUTPUT_VARIABLE ARCH)
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if (OS MATCHES "Linux"
AND NOT DEFINED CMAKE_TOOLCHAIN_FILE
AND NOT DISABLE_HERMETIC_BUILD
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AND ($ENV{CC} MATCHES ".*clang.*" OR CMAKE_C_COMPILER MATCHES ".*clang.*"))
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if (ARCH MATCHES "amd64|x86_64")
set (CMAKE_TOOLCHAIN_FILE "cmake/linux/toolchain-x86_64.cmake" CACHE INTERNAL "" FORCE)
elseif (ARCH MATCHES "^(aarch64.*|AARCH64.*|arm64.*|ARM64.*)")
set (CMAKE_TOOLCHAIN_FILE "cmake/linux/toolchain-aarch64.cmake" CACHE INTERNAL "" FORCE)
elseif (ARCH MATCHES "^(ppc64le.*|PPC64LE.*)")
set (CMAKE_TOOLCHAIN_FILE "cmake/linux/toolchain-ppc64le.cmake" CACHE INTERNAL "" FORCE)
else ()
message (FATAL_ERROR "Unsupported architecture: ${ARCH}")
endif ()
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endif()