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Merge pull request #37796 from azat/default-clang

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Use clang compiler by default and cleanup cmake preload
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Robert Schulze 2022-06-05 20:37:35 +02:00 committed by GitHub
commit e39e5adf74
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1 changed files with 34 additions and 9 deletions
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43
PreLoad.cmake
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@ -15,25 +15,33 @@
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)
set(CMAKE_GENERATOR "Ninja" CACHE INTERNAL "")
endif ()
endif()
# Check if environment is polluted.
if (NOT $ENV{CFLAGS} STREQUAL ""
OR NOT $ENV{CXXFLAGS} STREQUAL ""
OR NOT $ENV{LDFLAGS} STREQUAL ""
if (NOT "$ENV{CFLAGS}" STREQUAL ""
OR NOT "$ENV{CXXFLAGS}" STREQUAL ""
OR NOT "$ENV{LDFLAGS}" STREQUAL ""
OR CMAKE_C_FLAGS OR CMAKE_CXX_FLAGS OR CMAKE_EXE_LINKER_FLAGS OR CMAKE_SHARED_LINKER_FLAGS OR CMAKE_MODULE_LINKER_FLAGS
OR CMAKE_C_FLAGS_INIT OR CMAKE_CXX_FLAGS_INIT OR CMAKE_EXE_LINKER_FLAGS_INIT OR CMAKE_SHARED_LINKER_FLAGS_INIT OR CMAKE_MODULE_LINKER_FLAGS_INIT)
# if $ENV
message("CFLAGS: $ENV{CFLAGS}")
message("CXXFLAGS: $ENV{CXXFLAGS}")
message("LDFLAGS: $ENV{LDFLAGS}")
# if *_FLAGS
message("CMAKE_C_FLAGS: ${CMAKE_C_FLAGS}")
message("CMAKE_CXX_FLAGS: ${CMAKE_CXX_FLAGS}")
message("CMAKE_EXE_LINKER_FLAGS: ${CMAKE_EXE_LINKER_FLAGS}")
message("CMAKE_SHARED_LINKER_FLAGS: ${CMAKE_SHARED_LINKER_FLAGS}")
message("CMAKE_MODULE_LINKER_FLAGS: ${CMAKE_MODULE_LINKER_FLAGS}")
# if *_FLAGS_INIT
message("CMAKE_C_FLAGS_INIT: ${CMAKE_C_FLAGS_INIT}")
message("CMAKE_CXX_FLAGS_INIT: ${CMAKE_CXX_FLAGS_INIT}")
message("CMAKE_EXE_LINKER_FLAGS_INIT: ${CMAKE_EXE_LINKER_FLAGS_INIT}")
message("CMAKE_SHARED_LINKER_FLAGS_INIT: ${CMAKE_SHARED_LINKER_FLAGS_INIT}")
message("CMAKE_MODULE_LINKER_FLAGS_INIT: ${CMAKE_MODULE_LINKER_FLAGS_INIT}")
message(FATAL_ERROR "
Some of the variables like CFLAGS, CXXFLAGS, LDFLAGS are not empty.
@ -51,18 +59,35 @@ endif()
execute_process(COMMAND uname -s OUTPUT_VARIABLE OS)
execute_process(COMMAND uname -m OUTPUT_VARIABLE ARCH)
# By default, prefer clang on Linux
# But note, that you still may change the compiler with -DCMAKE_C_COMPILER/-DCMAKE_CXX_COMPILER.
if (OS MATCHES "Linux"
# some build systems may use CC/CXX env variables
AND "$ENV{CC}" STREQUAL ""
AND "$ENV{CXX}" STREQUAL "")
find_program(CLANG_PATH clang)
if (CLANG_PATH)
set(CMAKE_C_COMPILER "clang" CACHE INTERNAL "")
endif()
find_program(CLANG_CXX_PATH clang++)
if (CLANG_CXX_PATH)
set(CMAKE_CXX_COMPILER "clang++" CACHE INTERNAL "")
endif()
endif()
if (OS MATCHES "Linux"
AND NOT DEFINED CMAKE_TOOLCHAIN_FILE
AND NOT DISABLE_HERMETIC_BUILD
AND ($ENV{CC} MATCHES ".*clang.*" OR CMAKE_C_COMPILER MATCHES ".*clang.*"))
AND ("$ENV{CC}" MATCHES ".*clang.*" OR CMAKE_C_COMPILER MATCHES ".*clang.*"))
if (ARCH MATCHES "amd64|x86_64")
set (CMAKE_TOOLCHAIN_FILE "cmake/linux/toolchain-x86_64.cmake" CACHE INTERNAL "" FORCE)
set (CMAKE_TOOLCHAIN_FILE "cmake/linux/toolchain-x86_64.cmake" CACHE INTERNAL "")
elseif (ARCH MATCHES "^(aarch64.*|AARCH64.*|arm64.*|ARM64.*)")
set (CMAKE_TOOLCHAIN_FILE "cmake/linux/toolchain-aarch64.cmake" CACHE INTERNAL "" FORCE)
set (CMAKE_TOOLCHAIN_FILE "cmake/linux/toolchain-aarch64.cmake" CACHE INTERNAL "")
elseif (ARCH MATCHES "^(ppc64le.*|PPC64LE.*)")
set (CMAKE_TOOLCHAIN_FILE "cmake/linux/toolchain-ppc64le.cmake" CACHE INTERNAL "" FORCE)
else ()
set (CMAKE_TOOLCHAIN_FILE "cmake/linux/toolchain-ppc64le.cmake" CACHE INTERNAL "")
else ()
message (FATAL_ERROR "Unsupported architecture: ${ARCH}")
endif ()