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build: use POSITION_INDEPENDENT_CODE CMake property
Use the POSITION_INDEPENDENT_CODE target property to indicate that we should be building with -fPIC or the equivalent flag based on the toolchain that we are using. This makes the check more portable and simplifies the flags management. Because we don't want this setting to propagate in the case of an in-tree build, set the property on the targets we construct explicitly rather than setting CMAKE_POSITION_INDEPENDENT_CODE to ON globally. llvm-svn: 305174
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@ -50,7 +50,6 @@ endif ()
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# Check compiler flags
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check_c_compiler_flag(-funwind-tables LIBCXXABI_HAS_FUNWIND_TABLES)
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check_cxx_compiler_flag(-fPIC LIBCXXABI_HAS_FPIC_FLAG)
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check_cxx_compiler_flag(-fno-exceptions LIBCXXABI_HAS_NO_EXCEPTIONS_FLAG)
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check_cxx_compiler_flag(-fno-rtti LIBCXXABI_HAS_NO_RTTI_FLAG)
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check_cxx_compiler_flag(-fstrict-aliasing LIBCXXABI_HAS_FSTRICT_ALIASING_FLAG)
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@ -77,7 +77,6 @@ if (MINGW)
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endif()
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# Setup flags.
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add_compile_flags_if_supported(-fPIC)
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add_link_flags_if_supported(-nodefaultlibs)
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set(LIBCXXABI_SHARED_LINK_FLAGS)
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@ -110,11 +109,12 @@ endif()
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# Add a object library that contains the compiled source files.
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add_library(cxxabi_objects OBJECT ${LIBCXXABI_SOURCES} ${LIBCXXABI_HEADERS})
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set_target_properties(cxxabi_objects
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PROPERTIES
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COMPILE_FLAGS "${LIBCXXABI_COMPILE_FLAGS}"
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)
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PROPERTIES
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COMPILE_FLAGS
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"${LIBCXXABI_COMPILE_FLAGS}"
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POSITION_INDEPENDENT_CODE
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ON)
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set(LIBCXXABI_TARGETS)
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@ -123,12 +123,17 @@ if (LIBCXXABI_ENABLE_SHARED)
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add_library(cxxabi_shared SHARED $<TARGET_OBJECTS:cxxabi_objects>)
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target_link_libraries(cxxabi_shared ${LIBCXXABI_LIBRARIES})
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set_target_properties(cxxabi_shared
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PROPERTIES
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LINK_FLAGS "${LIBCXXABI_LINK_FLAGS} ${LIBCXXABI_SHARED_LINK_FLAGS}"
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OUTPUT_NAME "c++abi"
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VERSION "1.0"
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SOVERSION "1"
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)
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PROPERTIES
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LINK_FLAGS
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"${LIBCXXABI_LINK_FLAGS} ${LIBCXXABI_SHARED_LINK_FLAGS}"
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OUTPUT_NAME
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"c++abi"
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POSITION_INDEPENDENT_CODE
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ON
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SOVERSION
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"1"
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VERSION
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"1.0")
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list(APPEND LIBCXXABI_TARGETS "cxxabi_shared")
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endif()
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@ -137,10 +142,13 @@ if (LIBCXXABI_ENABLE_STATIC)
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add_library(cxxabi_static STATIC $<TARGET_OBJECTS:cxxabi_objects>)
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target_link_libraries(cxxabi_static ${LIBCXXABI_LIBRARIES})
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set_target_properties(cxxabi_static
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PROPERTIES
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LINK_FLAGS "${LIBCXXABI_LINK_FLAGS}"
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OUTPUT_NAME "c++abi"
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)
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PROPERTIES
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LINK_FLAGS
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"${LIBCXXABI_LINK_FLAGS}"
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OUTPUT_NAME
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"c++abi"
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POSITION_INDEPENDENT_CODE
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ON)
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list(APPEND LIBCXXABI_TARGETS "cxxabi_static")
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endif()
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