--- /dev/null
+# Source: https://github.com/axr/solar-cmake
+# Based on the Qt 5 processor detection code, so should be very accurate
+# https://qt.gitorious.org/qt/qtbase/blobs/master/src/corelib/global/qprocessordetection.h
+# Currently handles arm (v5, v6, v7), x86 (32/64), ia64, and ppc (32/64)
+
+# Regarding POWER/PowerPC, just as is noted in the Qt source,
+# "There are many more known variants/revisions that we do not handle/detect."
+
+set(archdetect_c_code "
+#if defined(__arm__) || defined(__TARGET_ARCH_ARM)
+ #if defined(__ARM_ARCH_7__) \\
+ || defined(__ARM_ARCH_7A__) \\
+ || defined(__ARM_ARCH_7R__) \\
+ || defined(__ARM_ARCH_7M__) \\
+ || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 7)
+ #error cmake_ARCH armv7
+ #elif defined(__ARM_ARCH_6__) \\
+ || defined(__ARM_ARCH_6J__) \\
+ || defined(__ARM_ARCH_6T2__) \\
+ || defined(__ARM_ARCH_6Z__) \\
+ || defined(__ARM_ARCH_6K__) \\
+ || defined(__ARM_ARCH_6ZK__) \\
+ || defined(__ARM_ARCH_6M__) \\
+ || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 6)
+ #error cmake_ARCH armv6
+ #elif defined(__ARM_ARCH_5TEJ__) \\
+ || (defined(__TARGET_ARCH_ARM) && __TARGET_ARCH_ARM-0 >= 5)
+ #error cmake_ARCH armv5
+ #else
+ #error cmake_ARCH arm
+ #endif
+#elif defined(__aarch64__)
+ #if defined(__ARM_ARCH) && __ARM_ARCH == 8
+ #error cmake_ARCH armv8
+ #else
+ #error cmake_ARCH arm64
+ #endif
+#elif defined(__i386) || defined(__i386__) || defined(_M_IX86)
+ #error cmake_ARCH i386
+#elif defined(__x86_64) || defined(__x86_64__) || defined(__amd64) || defined(_M_X64)
+ #error cmake_ARCH x86_64
+#elif defined(__ia64) || defined(__ia64__) || defined(_M_IA64)
+ #error cmake_ARCH ia64
+#elif defined(__ppc__) || defined(__ppc) || defined(__powerpc__) \\
+ || defined(_ARCH_COM) || defined(_ARCH_PWR) || defined(_ARCH_PPC) \\
+ || defined(_M_MPPC) || defined(_M_PPC)
+ #if defined(__ppc64__) || defined(__powerpc64__) || defined(__64BIT__)
+ #error cmake_ARCH ppc64
+ #else
+ #error cmake_ARCH ppc
+ #endif
+#endif
+
+#error cmake_ARCH unknown
+")
+
+# Set ppc_support to TRUE before including this file or ppc and ppc64
+# will be treated as invalid architectures since they are no longer supported by Apple
+
+function(target_architecture output_var)
+ if(APPLE AND CMAKE_OSX_ARCHITECTURES)
+ # On OS X we use CMAKE_OSX_ARCHITECTURES *if* it was set
+ # First let's normalize the order of the values
+
+ # Note that it's not possible to compile PowerPC applications if you are using
+ # the OS X SDK version 10.6 or later - you'll need 10.4/10.5 for that, so we
+ # disable it by default
+ # See this page for more information:
+ # http://stackoverflow.com/questions/5333490/how-can-we-restore-ppc-ppc64-as-well-as-full-10-4-10-5-sdk-support-to-xcode-4
+
+ # Architecture defaults to i386 or ppc on OS X 10.5 and earlier, depending on the CPU type detected at runtime.
+ # On OS X 10.6+ the default is x86_64 if the CPU supports it, i386 otherwise.
+
+ foreach(osx_arch ${CMAKE_OSX_ARCHITECTURES})
+ if("${osx_arch}" STREQUAL "ppc" AND ppc_support)
+ set(osx_arch_ppc TRUE)
+ elseif("${osx_arch}" STREQUAL "i386")
+ set(osx_arch_i386 TRUE)
+ elseif("${osx_arch}" STREQUAL "x86_64")
+ set(osx_arch_x86_64 TRUE)
+ elseif("${osx_arch}" STREQUAL "ppc64" AND ppc_support)
+ set(osx_arch_ppc64 TRUE)
+ else()
+ message(FATAL_ERROR "Invalid OS X arch name: ${osx_arch}")
+ endif()
+ endforeach()
+
+ # Now add all the architectures in our normalized order
+ if(osx_arch_ppc)
+ list(APPEND ARCH ppc)
+ endif()
+
+ if(osx_arch_i386)
+ list(APPEND ARCH i386)
+ endif()
+
+ if(osx_arch_x86_64)
+ list(APPEND ARCH x86_64)
+ endif()
+
+ if(osx_arch_ppc64)
+ list(APPEND ARCH ppc64)
+ endif()
+ else()
+ file(WRITE "${CMAKE_BINARY_DIR}/arch.c" "${archdetect_c_code}")
+
+ enable_language(C)
+
+ # Detect the architecture in a rather creative way...
+ # This compiles a small C program which is a series of ifdefs that selects a
+ # particular #error preprocessor directive whose message string contains the
+ # target architecture. The program will always fail to compile (both because
+ # file is not a valid C program, and obviously because of the presence of the
+ # #error preprocessor directives... but by exploiting the preprocessor in this
+ # way, we can detect the correct target architecture even when cross-compiling,
+ # since the program itself never needs to be run (only the compiler/preprocessor)
+ try_run(
+ run_result_unused
+ compile_result_unused
+ "${CMAKE_BINARY_DIR}"
+ "${CMAKE_BINARY_DIR}/arch.c"
+ COMPILE_OUTPUT_VARIABLE ARCH
+ CMAKE_FLAGS CMAKE_OSX_ARCHITECTURES=${CMAKE_OSX_ARCHITECTURES}
+ )
+
+ # Parse the architecture name from the compiler output
+ string(REGEX MATCH "cmake_ARCH ([a-zA-Z0-9_]+)" ARCH "${ARCH}")
+
+ # Get rid of the value marker leaving just the architecture name
+ string(REPLACE "cmake_ARCH " "" ARCH "${ARCH}")
+
+ # If we are compiling with an unknown architecture this variable should
+ # already be set to "unknown" but in the case that it's empty (i.e. due
+ # to a typo in the code), then set it to unknown
+ if (NOT ARCH)
+ set(ARCH unknown)
+ endif()
+ endif()
+
+ set(${output_var} "${ARCH}" PARENT_SCOPE)
+endfunction()
projects / c11concurrency-benchmarks.git / blobdiff