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Detect the correct target architecture for clang compilers.

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During compiler identification, if CMAKE_{C,CXX}_COMPILER_TARGET is
defined, the corresponding clang target flag is used to guaranty proper
target architecture detection.
This commit is contained in:
Thomas Bernard 2020-07-28 19:48:47 +02:00
parent e4e899056e
commit 270e0d9c4d
3 changed files with 12 additions and 1 deletions
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4
Modules/CMakeDetermineCCompiler.cmake
View File

@ -87,7 +87,9 @@ else()
"--target=arm-arm-none-eabi -mcpu=cortex-m3"
)
endif()
if(CMAKE_C_COMPILER_TARGET)
list(PREPEND CMAKE_C_COMPILER_ID_TEST_FLAGS "-c --target=${CMAKE_C_COMPILER_TARGET}")
endif()
# Build a small source file to identify the compiler.
if(NOT CMAKE_C_COMPILER_ID_RUN)
set(CMAKE_C_COMPILER_ID_RUN 1)

4
Modules/CMakeDetermineCXXCompiler.cmake
View File

@ -83,6 +83,10 @@ else()
)
endif()
if(CMAKE_CXX_COMPILER_TARGET)
list(PREPEND CMAKE_CXX_COPMILER_ID_TEST_FLAGS "-c --target=${CMAKE_CXX_COMPILER_TARGET}")
endif()
# Build a small source file to identify the compiler.
if(NOT CMAKE_CXX_COMPILER_ID_RUN)
set(CMAKE_CXX_COMPILER_ID_RUN 1)

5
Modules/Platform/Windows-MSVC.cmake
View File

@ -356,6 +356,11 @@ macro(__windows_compiler_msvc lang)
set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
if(CMAKE_${lang}_COMPILER_VERSION VERSION_LESS 3.4.0)
set(CMAKE_${lang}_COMPILE_OPTIONS_TARGET "-target ")
else()
set(CMAKE_${lang}_COMPILE_OPTIONS_TARGET "--target=")
endif()
# '-flto=thin' available since Clang 3.9 and Xcode 8
# * http://clang.llvm.org/docs/ThinLTO.html#clang-llvm
# * https://trac.macports.org/wiki/XcodeVersionInfo