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49 lines
1.4 KiB
CMake
49 lines
1.4 KiB
CMake
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# Set standard, system and compiler libraries explicitly.
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# This is intended for more control of what we are linking.
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set (DEFAULT_LIBS "-nodefaultlibs")
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if (OS_LINUX)
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# We need builtins from Clang's RT even without libcxx - for ubsan+int128.
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# See https://bugs.llvm.org/show_bug.cgi?id=16404
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if (COMPILER_CLANG)
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execute_process (COMMAND ${CMAKE_CXX_COMPILER} --print-file-name=libclang_rt.builtins-${CMAKE_SYSTEM_PROCESSOR}.a OUTPUT_VARIABLE BUILTINS_LIBRARY OUTPUT_STRIP_TRAILING_WHITESPACE)
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else ()
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set (BUILTINS_LIBRARY "-lgcc")
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endif ()
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set (DEFAULT_LIBS "${DEFAULT_LIBS} ${BUILTINS_LIBRARY} ${COVERAGE_OPTION} -lc -lm -lrt -lpthread -ldl")
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message(STATUS "Default libraries: ${DEFAULT_LIBS}")
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endif ()
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set(CMAKE_CXX_STANDARD_LIBRARIES ${DEFAULT_LIBS})
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set(CMAKE_C_STANDARD_LIBRARIES ${DEFAULT_LIBS})
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# Global libraries
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add_library(global-libs INTERFACE)
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# Unfortunately '-pthread' doesn't work with '-nodefaultlibs'.
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# Just make sure we have pthreads at all.
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set(THREADS_PREFER_PTHREAD_FLAG ON)
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find_package(Threads REQUIRED)
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add_subdirectory(libs/libglibc-compatibility)
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include (cmake/find_unwind.cmake)
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include (cmake/find_cxx.cmake)
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add_library(global-group INTERFACE)
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target_link_libraries(global-group INTERFACE
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-Wl,--start-group
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$<TARGET_PROPERTY:global-libs,INTERFACE_LINK_LIBRARIES>
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-Wl,--end-group
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)
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link_libraries(global-group)
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install(
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TARGETS global-group global-libs
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EXPORT global
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)
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