forked from OSchip/llvm-project
[CMake] NFC. Add support for testing the compiler without testing the linker
Summary: One of the big limitations we have in the compiler-rt build system today is that we cannot bootstrap building the builtins because you need a fully functional toolchain to pass CMake's tests. This change adds support for compile only tests. It is NFC because nothing is using the compile-only tests yet. I believe this is the last separable part of D16653. Reviewers: samsonov Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D19692 llvm-svn: 268427
This commit is contained in:
Chris Bieneman
parent
2a14132285
commit
aa3d2c13bf
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@ -0,0 +1,60 @@
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# This function takes an OS and a list of architectures and identifies the
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# subset of the architectures list that the installed toolchain can target.
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function(try_compile_only output)
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set(SIMPLE_C ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/src.c)
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file(WRITE ${SIMPLE_C} "int foo(int x, int y) { return x + y; }\n")
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string(REGEX MATCHALL "<[A-Za-z0-9_]*>" substitutions
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${CMAKE_C_COMPILE_OBJECT})
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string(REPLACE ";" " " extra_flags "${ARGN}")
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set(test_compile_command "${CMAKE_C_COMPILE_OBJECT}")
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foreach(substitution ${substitutions})
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if(substitution STREQUAL "<CMAKE_C_COMPILER>")
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string(REPLACE "<CMAKE_C_COMPILER>"
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"${CMAKE_C_COMPILER}" test_compile_command ${test_compile_command})
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elseif(substitution STREQUAL "<OBJECT>")
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string(REPLACE "<OBJECT>"
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"${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/test.o"
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test_compile_command ${test_compile_command})
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elseif(substitution STREQUAL "<SOURCE>")
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string(REPLACE "<SOURCE>" "${SIMPLE_C}" test_compile_command
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${test_compile_command})
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elseif(substitution STREQUAL "<FLAGS>")
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string(REPLACE "<FLAGS>" "${CMAKE_C_FLAGS} ${extra_flags}"
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test_compile_command ${test_compile_command})
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else()
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string(REPLACE "${substitution}" "" test_compile_command
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${test_compile_command})
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endif()
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endforeach()
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string(REPLACE " " ";" test_compile_command "${test_compile_command}")
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execute_process(
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COMMAND ${test_compile_command}
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RESULT_VARIABLE result
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OUTPUT_VARIABLE TEST_OUTPUT
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ERROR_VARIABLE TEST_ERROR
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)
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if(result EQUAL 0)
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set(${output} True PARENT_SCOPE)
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else()
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file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
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"Testing compiler for supporting " ${ARGN} ":\n"
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"Command: ${test_compile_command}\n"
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"${TEST_OUTPUT}\n${TEST_ERROR}\n${result}\n")
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set(${output} False PARENT_SCOPE)
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endif()
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endfunction()
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function(builtin_check_c_compiler_flag flag output)
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message(STATUS "Performing Test ${output}")
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try_compile_only(result ${flag})
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set(${output} ${result} PARENT_SCOPE)
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if(${result})
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message(STATUS "Performing Test ${output} - Success")
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else()
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message(STATUS "Performing Test ${output} - Failed")
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endif()
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endfunction()
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@ -56,14 +56,16 @@ function(darwin_test_archs os valid_archs)
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endif()
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set(archs ${ARGN})
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message(STATUS "Finding valid architectures for ${os}...")
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set(SIMPLE_CPP ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/src.cpp)
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file(WRITE ${SIMPLE_CPP} "#include <iostream>\nint main() { std::cout << std::endl; return 0; }\n")
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set(os_linker_flags)
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foreach(flag ${DARWIN_${os}_LINKFLAGS})
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set(os_linker_flags "${os_linker_flags} ${flag}")
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endforeach()
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if(NOT TEST_COMPILE_ONLY)
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message(STATUS "Finding valid architectures for ${os}...")
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set(SIMPLE_CPP ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/src.cpp)
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file(WRITE ${SIMPLE_CPP} "#include <iostream>\nint main() { std::cout << std::endl; return 0; }\n")
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set(os_linker_flags)
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foreach(flag ${DARWIN_${os}_LINKFLAGS})
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set(os_linker_flags "${os_linker_flags} ${flag}")
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endforeach()
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endif()
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# The simple program will build for x86_64h on the simulator because it is
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# compatible with x86_64 libraries (mostly), but since x86_64h isn't actually
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@ -74,12 +76,16 @@ function(darwin_test_archs os valid_archs)
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set(working_archs)
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foreach(arch ${archs})
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set(arch_linker_flags "-arch ${arch} ${os_linker_flags}")
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try_compile(CAN_TARGET_${os}_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_CPP}
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COMPILE_DEFINITIONS "-v -arch ${arch}" ${DARWIN_${os}_CFLAGS}
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CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS=${arch_linker_flags}"
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OUTPUT_VARIABLE TEST_OUTPUT)
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if(TEST_COMPILE_ONLY)
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try_compile_only(CAN_TARGET_${os}_${arch} -v -arch ${arch} ${DARWIN_${os}_CFLAGS})
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else()
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try_compile(CAN_TARGET_${os}_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_CPP}
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COMPILE_DEFINITIONS "-v -arch ${arch}" ${DARWIN_${os}_CFLAGS}
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CMAKE_FLAGS "-DCMAKE_EXE_LINKER_FLAGS=${arch_linker_flags}"
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OUTPUT_VARIABLE TEST_OUTPUT)
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endif()
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if(${CAN_TARGET_${os}_${arch}})
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list(APPEND working_archs ${arch})
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else()
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@ -114,6 +114,8 @@ macro(test_target_arch arch def)
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check_compile_definition("${def}" "${argstring}" HAS_${arch}_DEF)
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if(NOT HAS_${arch}_DEF)
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set(CAN_TARGET_${arch} FALSE)
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elseif(TEST_COMPILE_ONLY)
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try_compile_only(CAN_TARGET_${arch} ${TARGET_${arch}_CFLAGS})
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else()
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set(argstring "${CMAKE_EXE_LINKER_FLAGS} ${argstring}")
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try_compile(CAN_TARGET_${arch} ${CMAKE_BINARY_DIR} ${SIMPLE_SOURCE}
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