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CMake Module for deriving the target architecture

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This is needed for packaging and other decisions at configuration time
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Matt Clarkson 2015-05-28 17:50:13 +01:00 committed by bel
parent b6c83a4ebe
commit b84eda553e
1 changed files with 47 additions and 0 deletions
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47
cmake/DetermineTargetArchitecture.cmake Normal file
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# - Determines the target architecture of the compilation
#
# This function checks the architecture that will be built by the compiler
# and sets a variable to the architecture
#
# determine_target_architecture(<OUTPUT_VAR>)
#
# - Example
#
# include(DetermineTargetArchitecture)
# determine_target_architecture(PROJECT_NAME_ARCHITECTURE)
if(__determine_target_architecture)
return()
endif()
set(__determine_target_architecture INCLUDED)
function(determine_target_architecture FLAG)
if (MSVC)
if("${MSVC_C_ARCHITECTURE_ID}" STREQUAL "X86")
set(ARCH "i686")
elseif("${MSVC_C_ARCHITECTURE_ID}" STREQUAL "x64")
set(ARCH "x86_64")
elseif("${MSVC_C_ARCHITECTURE_ID}" STREQUAL "ARM")
set(ARCH "arm")
else()
message(FATAL_ERROR "Failed to determine the MSVC target architecture: ${MSVC_C_ARCHITECTURE_ID}")
endif()
else()
execute_process(
COMMAND ${CMAKE_C_COMPILER} -dumpmachine
RESULT_VARIABLE RESULT
OUTPUT_VARIABLE ARCH
ERROR_QUIET
)
if (RESULT)
message(FATAL_ERROR "Failed to determine target architecture triplet: ${RESULT}")
endif()
string(REGEX MATCH "([^-]+).*" ARCH_MATCH ${ARCH})
if (NOT CMAKE_MATCH_1 OR NOT ARCH_MATCH)
message(FATAL_ERROR "Failed to match the target architecture triplet: ${ARCH}")
endif()
set(ARCH ${CMAKE_MATCH_1})
endif()
message(STATUS "Target architecture - ${ARCH}")
set(FLAG ${ARCH} PARENT_SCOPE)
endfunction()