Merge pull request #228 from rolk/228_arch
Report target architecture when configuring
This commit is contained in:
Atgeirr Flø Rasmussen
commit
5e30cbccef
@ -8,6 +8,9 @@ function (system_info)
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else (CMAKE_SYSTEM MATCHES "Linux")
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else (CMAKE_SYSTEM MATCHES "Linux")
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message (STATUS "Operating system: ${CMAKE_SYSTEM}")
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message (STATUS "Operating system: ${CMAKE_SYSTEM}")
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endif (CMAKE_SYSTEM MATCHES "Linux")
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endif (CMAKE_SYSTEM MATCHES "Linux")
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target_architecture (TARGET_CPU)
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message (STATUS "Target architecture: ${TARGET_CPU}")
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endfunction (system_info)
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endfunction (system_info)
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# probe various system files that may be found
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# probe various system files that may be found
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@ -48,3 +51,120 @@ function (read_release valuename FROM filename INTO varname)
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)
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)
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set (${varname} "${${varname}}" PARENT_SCOPE)
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set (${varname} "${${varname}}" PARENT_SCOPE)
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endfunction (read_release valuename FROM filename INTO varname)
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endfunction (read_release valuename FROM filename INTO varname)
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# the following code is adapted from commit f7467762 of the code at
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# <https://github.com/petroules/solar-cmake/blob/master/TargetArch.cmake>
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# which is Copyright (c) 2012 Petroules Corporation, and which at the
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# time of download (2013-04-07 12:30 CET) is made available with a BSD license.
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#
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# it attempts to compile a program which detects the architecture from the
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# preprocessor symbols and communicate this back to us through an error message(!)
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function (target_architecture output_var)
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# OS X is capable of building for *several* architectures at once in
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# the Mach-O binary, and there is a variable that tells us which those
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# are, but they may be in any order, so they must be normalized
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if (APPLE AND CMAKE_OSX_ARCHITECTURES)
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# detect each of the possible candidates as a separate flag
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set (osx_arch_list i386 x86_64)
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foreach (osx_arch IN ITEMS ${CMAKE_OSX_ARCHITECTURES})
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foreach (candidate IN LISTS osx_arch_list)
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if ("${osx_arch}" STREQUAL "${candidate}")
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set (osx_arch_${candidate} TRUE)
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endif ("${osx_arch}" STREQUAL "${candidate}")
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endforeach (candidate)
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endforeach (osx_arch)
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# add all architectures back in normalized order
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foreach (candidate IN LISTS osx_arch_list)
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if (osx_arch_${candidate})
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list (APPEND ARCH ${candidate})
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endif (osx_arch_${candidate})
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endforeach (candidate)
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else (APPLE AND CMAKE_OSX_ARCHITECTURES)
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# use the preprocessor defines to determine which target architectures
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# that are available
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set (arch_c_src "
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#if defined(__arm__) || defined(__TARGET_ARCH_ARM)
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# if defined(__ARM_ARCH_7__) \\
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|| defined(__ARM_ARCH_7A__) \\
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|| defined(__ARM_ARCH_7R__) \\
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|| defined(__ARM_ARCH_7M__) \\
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|| (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 7)
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# error cmake_ARCH armv7
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# elif defined(__ARM_ARCH_6__) \\
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|| defined(__ARM_ARCH_6J__) \\
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|| defined(__ARM_ARCH_6T2__) \\
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|| defined(__ARM_ARCH_6Z__) \\
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|| defined(__ARM_ARCH_6K__) \\
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|| defined(__ARM_ARCH_6ZK__) \\
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|| defined(__ARM_ARCH_6M__) \\
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|| (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 6)
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# error cmake_ARCH armv6
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# elif defined(__ARM_ARCH_5TEJ__) \\
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|| (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 5)
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# error cmake_ARCH armv5
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# else
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# error cmake_ARCH arm
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# endif
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#elif defined(__i386) \\
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|| defined(__i386__) \\
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|| defined(_M_IX86)
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# error cmake_ARCH i386
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#elif defined(__x86_64) \\
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|| defined(__x86_64__) \\
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|| defined(__amd64) \\
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|| defined(_M_X64)
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# error cmake_ARCH x86_64
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#elif defined(__ia64) \\
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|| defined(__ia64__) \\
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|| defined(_M_IA64)
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# error cmake_ARCH ia64
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#elif defined(__ppc__) \\
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|| defined(__ppc) \\
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|| defined(__powerpc__) \\
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|| defined(_ARCH_COM) \\
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|| defined(_ARCH_PWR) \\
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|| defined(_ARCH_PPC) \\
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|| defined(_M_MPPC) \\
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|| defined(_M_PPC)
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# if defined(__ppc64__) \\
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|| defined(__powerpc64__) \\
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|| defined(__64BIT__)
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# error cmake_ARCH ppc64
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# else
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# error cmake_ARCH ppc
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# endif
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#else
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# error cmake_ARCH unknown
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#endif
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")
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# write a temporary program that can be compiled to get the result
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set (tmp_dir "${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp")
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set (arch_c "${tmp_dir}/arch.c")
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file (WRITE "${arch_c}" "${arch_c_src}")
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try_compile (
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compile_result_unused
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"${tmp_dir}"
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"${arch_c}"
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CMAKE_FLAGS CMAKE_OSX_ARCHITECTURES=${CMAKE_OSX_ARCHITECTURES}
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OUTPUT_VARIABLE ARCH
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)
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# parse the architecture name from the compiler output
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string (REGEX MATCH "cmake_ARCH ([a-zA-Z0-9_]+)" ARCH "${ARCH}")
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# get rid of the value marker leaving just the architecture name
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string (REPLACE "cmake_ARCH " "" ARCH "${ARCH}")
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# if we are compiling with an unknown architecture this variable should
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# already be set to "unknown" but in the case that it's empty (i.e. due
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# to a typo in the code), then set it to unknown
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if (NOT ARCH)
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set (ARCH "unknown")
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endif()
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endif()
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set (${output_var} "${ARCH}" PARENT_SCOPE)
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endfunction()
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