Detect the correct target architecture for clang compilers.
During compiler identification, if CMAKE_{C,CXX}_COMPILER_TARGET is
defined, the corresponding clang target flag is used to guaranty proper
target architecture detection.
diff --git a/Modules/CMakeDetermineCCompiler.cmake b/Modules/CMakeDetermineCCompiler.cmake
index 86683d1..1311719 100644
--- a/Modules/CMakeDetermineCCompiler.cmake
+++ b/Modules/CMakeDetermineCCompiler.cmake
@@ -87,7 +87,9 @@
"--target=arm-arm-none-eabi -mcpu=cortex-m3"
)
endif()
-
+if(CMAKE_C_COMPILER_TARGET)
+ list(PREPEND CMAKE_C_COMPILER_ID_TEST_FLAGS "-c --target=${CMAKE_C_COMPILER_TARGET}")
+endif()
# Build a small source file to identify the compiler.
if(NOT CMAKE_C_COMPILER_ID_RUN)
set(CMAKE_C_COMPILER_ID_RUN 1)
diff --git a/Modules/CMakeDetermineCXXCompiler.cmake b/Modules/CMakeDetermineCXXCompiler.cmake
index 662b831..46f1ee1 100644
--- a/Modules/CMakeDetermineCXXCompiler.cmake
+++ b/Modules/CMakeDetermineCXXCompiler.cmake
@@ -83,6 +83,10 @@
)
endif()
+if(CMAKE_CXX_COMPILER_TARGET)
+ list(PREPEND CMAKE_CXX_COPMILER_ID_TEST_FLAGS "-c --target=${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)
diff --git a/Modules/Platform/Windows-MSVC.cmake b/Modules/Platform/Windows-MSVC.cmake
index 2476a33..e272da9 100644
--- a/Modules/Platform/Windows-MSVC.cmake
+++ b/Modules/Platform/Windows-MSVC.cmake
@@ -356,6 +356,11 @@
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
