+check_cxx_compiler_flag("-Wno-variadic-macros" SUPPORTS_NO_VARIADIC_MACROS_FLAG)
+
+set(USE_NO_MAYBE_UNINITIALIZED 0)
+set(USE_NO_UNINITIALIZED 0)
+
+# Disable gcc's potentially uninitialized use analysis as it presents lots of
+# false positives.
+if (CMAKE_COMPILER_IS_GNUCXX)
+ check_cxx_compiler_flag("-Wmaybe-uninitialized" HAS_MAYBE_UNINITIALIZED)
+ if (HAS_MAYBE_UNINITIALIZED)
+ set(USE_NO_MAYBE_UNINITIALIZED 1)
+ else()
+ # Only recent versions of gcc make the distinction between -Wuninitialized
+ # and -Wmaybe-uninitialized. If -Wmaybe-uninitialized isn't supported, just
+ # turn off all uninitialized use warnings.
+ check_cxx_compiler_flag("-Wuninitialized" HAS_UNINITIALIZED)
+ set(USE_NO_UNINITIALIZED ${HAS_UNINITIALIZED})
+ endif()
+endif()
+
+# By default, we target the host, but this can be overridden at CMake
+# invocation time.
+include(GetHostTriple)
+get_host_triple(LLVM_INFERRED_HOST_TRIPLE)
+
+set(LLVM_HOST_TRIPLE "${LLVM_INFERRED_HOST_TRIPLE}" CACHE STRING
+ "Host on which LLVM binaries will run")
+
+# Determine the native architecture.
+string(TOLOWER "${LLVM_TARGET_ARCH}" LLVM_NATIVE_ARCH)
+if( LLVM_NATIVE_ARCH STREQUAL "host" )
+ string(REGEX MATCH "^[^-]*" LLVM_NATIVE_ARCH ${LLVM_HOST_TRIPLE})
+endif ()
+
+if (LLVM_NATIVE_ARCH MATCHES "i[2-6]86")
+ set(LLVM_NATIVE_ARCH X86)
+elseif (LLVM_NATIVE_ARCH STREQUAL "x86")
+ set(LLVM_NATIVE_ARCH X86)
+elseif (LLVM_NATIVE_ARCH STREQUAL "amd64")
+ set(LLVM_NATIVE_ARCH X86)
+elseif (LLVM_NATIVE_ARCH STREQUAL "x86_64")
+ set(LLVM_NATIVE_ARCH X86)
+elseif (LLVM_NATIVE_ARCH MATCHES "sparc")
+ set(LLVM_NATIVE_ARCH Sparc)
+elseif (LLVM_NATIVE_ARCH MATCHES "powerpc")
+ set(LLVM_NATIVE_ARCH PowerPC)
+elseif (LLVM_NATIVE_ARCH MATCHES "aarch64")
+ set(LLVM_NATIVE_ARCH AArch64)
+elseif (LLVM_NATIVE_ARCH MATCHES "arm")
+ set(LLVM_NATIVE_ARCH ARM)
+elseif (LLVM_NATIVE_ARCH MATCHES "mips")
+ set(LLVM_NATIVE_ARCH Mips)
+elseif (LLVM_NATIVE_ARCH MATCHES "xcore")
+ set(LLVM_NATIVE_ARCH XCore)
+elseif (LLVM_NATIVE_ARCH MATCHES "msp430")
+ set(LLVM_NATIVE_ARCH MSP430)
+elseif (LLVM_NATIVE_ARCH MATCHES "hexagon")
+ set(LLVM_NATIVE_ARCH Hexagon)
+elseif (LLVM_NATIVE_ARCH MATCHES "s390x")
+ set(LLVM_NATIVE_ARCH SystemZ)
+else ()
+ message(FATAL_ERROR "Unknown architecture ${LLVM_NATIVE_ARCH}")
+endif ()
+
+# If build targets includes "host", then replace with native architecture.
+list(FIND LLVM_TARGETS_TO_BUILD "host" idx)
+if( NOT idx LESS 0 )
+ list(REMOVE_AT LLVM_TARGETS_TO_BUILD ${idx})
+ list(APPEND LLVM_TARGETS_TO_BUILD ${LLVM_NATIVE_ARCH})
+ list(REMOVE_DUPLICATES LLVM_TARGETS_TO_BUILD)
+endif()
+
+list(FIND LLVM_TARGETS_TO_BUILD ${LLVM_NATIVE_ARCH} NATIVE_ARCH_IDX)
+if (NATIVE_ARCH_IDX EQUAL -1)
+ message(STATUS
+ "Native target ${LLVM_NATIVE_ARCH} is not selected; lli will not JIT code")
+else ()
+ message(STATUS "Native target architecture is ${LLVM_NATIVE_ARCH}")
+ set(LLVM_NATIVE_TARGET LLVMInitialize${LLVM_NATIVE_ARCH}Target)
+ set(LLVM_NATIVE_TARGETINFO LLVMInitialize${LLVM_NATIVE_ARCH}TargetInfo)
+ set(LLVM_NATIVE_TARGETMC LLVMInitialize${LLVM_NATIVE_ARCH}TargetMC)
+ set(LLVM_NATIVE_ASMPRINTER LLVMInitialize${LLVM_NATIVE_ARCH}AsmPrinter)
+
+ # We don't have an ASM parser for all architectures yet.
+ if (EXISTS ${CMAKE_SOURCE_DIR}/lib/Target/${LLVM_NATIVE_ARCH}/AsmParser/CMakeLists.txt)
+ set(LLVM_NATIVE_ASMPARSER LLVMInitialize${LLVM_NATIVE_ARCH}AsmParser)
+ endif ()
+
+ # We don't have an disassembler for all architectures yet.
+ if (EXISTS ${CMAKE_SOURCE_DIR}/lib/Target/${LLVM_NATIVE_ARCH}/Disassembler/CMakeLists.txt)
+ set(LLVM_NATIVE_DISASSEMBLER LLVMInitialize${LLVM_NATIVE_ARCH}Disassembler)
+ endif ()
+endif ()