forked from OSchip/llvm-project
Fix linker script generation for in-tree builds
llvm-svn: 283700
This commit is contained in:
parent
fc1b0d5c24
commit
054fc4cef6
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@ -270,13 +270,13 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${LIBCXX_LIBRARY_DIR})
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# LIBCXX_CXX_FLAGS: General flags for both the compiler and linker.
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# LIBCXX_COMPILE_FLAGS: Compile only flags.
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# LIBCXX_LINK_FLAGS: Linker only flags.
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# LIBCXX_LIBRARIES: Private libraries libc++ is linked to.
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# LIBCXX_LIBRARIES_PUBLIC: Public libraries libc++ is linked to,
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# also exposed in the linker script.
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# LIBCXX_LIBRARIES: libraries libc++ is linked to.
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# LIBCXX_INTERFACE_LIBRARIES: Libraries that must be linked when using libc++
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# There libraries are exposed in the linker script.
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set(LIBCXX_COMPILE_FLAGS "")
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set(LIBCXX_LINK_FLAGS "")
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set(LIBCXX_LIBRARIES "")
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set(LIBCXX_LIBRARIES_PUBLIC "")
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set(LIBCXX_INTERFACE_LIBRARIES "")
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# Include macros for adding and removing libc++ flags.
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include(HandleLibcxxFlags)
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@ -188,6 +188,14 @@ macro(add_library_flags_if condition)
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endif()
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endmacro()
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# Add a list of libraries or link flags to 'LIBCXX_LIBRARIES'.
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macro(add_interface_library)
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foreach(lib ${ARGN})
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list(APPEND LIBCXX_LIBRARIES ${lib})
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list(APPEND LIBCXX_INTERFACE_LIBRARIES ${lib})
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endforeach()
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endmacro()
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# Turn a comma separated CMake list into a space separated string.
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macro(split_list listname)
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string(REPLACE ";" " " ${listname} "${${listname}}")
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@ -33,16 +33,19 @@ add_link_flags_if(LIBCXX_CXX_ABI_LIBRARY_PATH "-L${LIBCXX_CXX_ABI_LIBRARY_PATH}"
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add_library_flags_if(LIBCXX_COVERAGE_LIBRARY "${LIBCXX_COVERAGE_LIBRARY}")
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if (APPLE AND (LIBCXX_CXX_ABI_LIBNAME STREQUAL "libcxxabi" OR
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LIBCXX_CXX_ABI_LIBNAME STREQUAL "none"))
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set(LIBCXX_OSX_REEXPORT_SYSTEM_ABI_LIBRARY ON)
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endif()
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if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
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add_library_flags("-Wl,--whole-archive" "-Wl,-Bstatic")
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add_library_flags("${LIBCXX_CXX_ABI_LIBRARY}")
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add_library_flags("-Wl,-Bdynamic" "-Wl,--no-whole-archive")
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elseif (APPLE AND (LIBCXX_CXX_ABI_LIBNAME STREQUAL "libcxxabi" OR
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LIBCXX_CXX_ABI_LIBNAME STREQUAL "none"))
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# Apple re-exports libc++abi in libc++, so don't make it public
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elseif (LIBCXX_OSX_REEXPORT_SYSTEM_ABI_LIBRARY)
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add_library_flags("${LIBCXX_CXX_ABI_LIBRARY}")
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else ()
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list(APPEND LIBCXX_LIBRARIES_PUBLIC "${LIBCXX_CXX_ABI_LIBRARY}")
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add_interface_library("${LIBCXX_CXX_ABI_LIBRARY}")
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endif()
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if (APPLE AND LLVM_USE_SANITIZER)
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@ -85,7 +88,13 @@ add_library_flags_if(LIBCXX_HAVE_CXX_ATOMICS_WITH_LIB atomic)
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# Add the unwinder library.
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if (LIBCXXABI_USE_LLVM_UNWINDER)
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list(APPEND LIBCXX_LIBRARIES_PUBLIC unwind)
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if (TARGET unwind_shared)
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add_interface_library(unwind_shared)
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elseif (TARGET unwind_static)
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add_interface_library(unwind_static)
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else()
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add_interface_library(unwind)
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endif()
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endif()
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# Setup flags.
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@ -94,8 +103,7 @@ if (NOT WIN32)
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endif()
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add_link_flags_if_supported(-nodefaultlibs)
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if ( APPLE AND (LIBCXX_CXX_ABI_LIBNAME STREQUAL "libcxxabi" OR
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LIBCXX_CXX_ABI_LIBNAME STREQUAL "none"))
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if (LIBCXX_OSX_REEXPORT_SYSTEM_ABI_LIBRARY)
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if (NOT DEFINED LIBCXX_LIBCPPABI_VERSION)
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set(LIBCXX_LIBCPPABI_VERSION "2") # Default value
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execute_process(
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@ -164,9 +172,7 @@ set(LIBCXX_TARGETS)
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# Build the shared library.
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if (LIBCXX_ENABLE_SHARED)
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add_library(cxx_shared SHARED $<TARGET_OBJECTS:cxx_objects>)
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target_link_libraries(cxx_shared
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PRIVATE ${LIBCXX_LIBRARIES}
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PUBLIC ${LIBCXX_LIBRARIES_PUBLIC})
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target_link_libraries(cxx_shared ${LIBCXX_LIBRARIES})
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set_target_properties(cxx_shared
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PROPERTIES
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LINK_FLAGS "${LIBCXX_LINK_FLAGS}"
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@ -180,9 +186,7 @@ endif()
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# Build the static library.
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if (LIBCXX_ENABLE_STATIC)
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add_library(cxx_static STATIC $<TARGET_OBJECTS:cxx_objects>)
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target_link_libraries(cxx_static
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PRIVATE ${LIBCXX_LIBRARIES}
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PUBLIC ${LIBCXX_LIBRARIES_PUBLIC})
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target_link_libraries(cxx_static ${LIBCXX_LIBRARIES})
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set_target_properties(cxx_static
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PROPERTIES
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LINK_FLAGS "${LIBCXX_LINK_FLAGS}"
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@ -244,15 +248,16 @@ endif()
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if (LIBCXX_ENABLE_SHARED AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
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# Get the name of the ABI library and handle the case where CXXABI_LIBNAME
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# is a target name and not a library. Ex cxxabi_shared.
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set(LIBCXX_LIBRARIES_PUBLIC_NAMES)
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foreach(lib ${LIBCXX_LIBRARIES_PUBLIC})
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if (lib STREQUAL "cxxabi_shared")
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list(APPEND LIBCXX_LIBRARIES_PUBLIC_NAMES "c++abi")
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set(LIBCXX_INTERFACE_LIBRARY_NAMES)
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foreach(lib ${LIBCXX_INTERFACE_LIBRARIES})
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# FIXME: Handle cxxabi_static and unwind_static.
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if (TARGET ${lib})
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list(APPEND LIBCXX_INTERFACE_LIBRARY_NAMES "$<TARGET_PROPERTY:${lib},OUTPUT_NAME>")
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else()
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list(APPEND LIBCXX_LIBRARIES_PUBLIC_NAMES "${lib}")
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list(APPEND LIBCXX_INTERFACE_LIBRARY_NAMES "${lib}")
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endif()
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endforeach()
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#split_list(LIBCXX_INTERFACE_LIBRARY_NAMES)
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# Generate a linker script inplace of a libc++.so symlink. Rerun this command
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# after cxx builds.
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add_custom_command(TARGET cxx_shared POST_BUILD
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@ -260,7 +265,7 @@ if (LIBCXX_ENABLE_SHARED AND LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
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${PYTHON_EXECUTABLE} ${LIBCXX_SOURCE_DIR}/utils/gen_link_script/gen_link_script.py
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ARGS
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"$<TARGET_LINKER_FILE:cxx_shared>"
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"\"${LIBCXX_LIBRARIES_PUBLIC_NAMES}\""
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${LIBCXX_INTERFACE_LIBRARY_NAMES}
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WORKING_DIRECTORY ${LIBCXX_BUILD_DIR}
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)
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endif()
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@ -11,6 +11,18 @@ endmacro()
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set(LIBCXX_LIT_VARIANT "libcxx" CACHE STRING
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"Configuration variant to use for LIT.")
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# The tests shouldn't link to any ABI library when it has been linked into
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# libc++ statically or via a linker script.
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if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY OR LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
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set(LIBCXX_CXX_ABI_LIBNAME "none")
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endif()
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# The tests shouldn't link to libunwind if we have a linker script which
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# already does so.
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if (LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
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set(LIBCXXABI_USE_LLVM_UNWINDER OFF)
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endif()
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pythonize_bool(LIBCXX_ENABLE_EXCEPTIONS)
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pythonize_bool(LIBCXX_ENABLE_EXPERIMENTAL_LIBRARY)
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pythonize_bool(LIBCXX_ENABLE_FILESYSTEM)
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@ -24,12 +36,6 @@ pythonize_bool(LIBCXX_HAS_ATOMIC_LIB)
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pythonize_bool(LIBCXX_HAVE_CXX_ATOMICS_WITH_LIB)
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pythonize_bool(LIBCXX_HAS_EXTERNAL_THREAD_API)
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# The tests shouldn't link to any ABI library when it has been linked into
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# libc++ statically or via a linker script.
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if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY OR LIBCXX_ENABLE_ABI_LINKER_SCRIPT)
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set(LIBCXX_CXX_ABI_LIBNAME "none")
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endif()
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# By default, for non-standalone builds, libcxx and libcxxabi share a library
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# directory.
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if (NOT LIBCXX_CXX_ABI_LIBRARY_PATH)
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@ -16,13 +16,13 @@ def print_and_exit(msg):
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sys.exit(1)
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def usage_and_exit():
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print_and_exit("Usage: ./gen_link_script.py [--help] [--dryrun] <path/to/libcxx.so> <abi_libname>")
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print_and_exit("Usage: ./gen_link_script.py [--help] [--dryrun] <path/to/libcxx.so> <public_libs>...")
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def help_and_exit():
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help_msg = \
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"""Usage
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gen_link_script.py [--help] [--dryrun] <path/to/libcxx.so> <public_libs>
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gen_link_script.py [--help] [--dryrun] <path/to/libcxx.so> <public_libs>...
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Generate a linker script that links libc++ to the proper ABI library.
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The script replaces the specified libc++ symlink.
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@ -49,10 +49,12 @@ def parse_args():
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dryrun = '--dryrun' == args[0]
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if dryrun:
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del args[0]
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if len(args) != 2:
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if len(args) < 2:
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usage_and_exit()
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symlink_file = args[0]
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public_libs = args[1].split(';')
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del args[0]
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public_libs = list(args)
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print('%r' % public_libs)
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return dryrun, symlink_file, public_libs
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def main():
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