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[libcxx] Fix libc++ re-exporting logic when Command Line Tools are not installed

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Summary:
When the Xcode Command Line tools are not installed but CMAKE_OSX_SYSROOT is
set, we would try to re-export symbols from the libc++abi.dylib shipped in
the sysroot, which does not exist. This commit changes the build on OS X to
always re-export symbols from the explicit re-export lists, which doesn't
change depending on what system you're building on, and is therefore much
less flaky.

Reviewers: EricWF, mclow.lists

Subscribers: mgorny, christof, jkorous, dexonsmith, libcxx-commits

Differential Revision: https://reviews.llvm.org/D54595

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@347708 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Louis Dionne 2018-11-27 20:59:47 +00:00
parent f4e307bd3c
commit f27a903f77
1 changed files with 11 additions and 18 deletions
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29
lib/CMakeLists.txt
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@ -41,14 +41,14 @@ add_library_flags_if(LIBCXX_COVERAGE_LIBRARY "${LIBCXX_COVERAGE_LIBRARY}")
if (APPLE AND (LIBCXX_CXX_ABI_LIBNAME STREQUAL "libcxxabi" OR
LIBCXX_CXX_ABI_LIBNAME STREQUAL "default"))
set(LIBCXX_OSX_REEXPORT_SYSTEM_ABI_LIBRARY ON)
set(LIBCXX_OSX_REEXPORT_LIBCXXABI_SYMBOLS ON)
endif()
if (LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY)
add_library_flags("-Wl,--whole-archive" "-Wl,-Bstatic")
add_library_flags("${LIBCXX_CXX_ABI_LIBRARY}")
add_library_flags("-Wl,-Bdynamic" "-Wl,--no-whole-archive")
elseif (LIBCXX_OSX_REEXPORT_SYSTEM_ABI_LIBRARY)
elseif (LIBCXX_OSX_REEXPORT_LIBCXXABI_SYMBOLS)
add_library_flags("${LIBCXX_CXX_ABI_LIBRARY}")
else ()
add_interface_library("${LIBCXX_CXX_ABI_LIBRARY}")
@ -129,7 +129,7 @@ if (LIBCXX_TARGETING_MSVC)
add_library_flags(iso_stdio_wide_specifiers)
endif()
if (LIBCXX_OSX_REEXPORT_SYSTEM_ABI_LIBRARY)
if (LIBCXX_OSX_REEXPORT_LIBCXXABI_SYMBOLS)
if (NOT DEFINED LIBCXX_LIBCPPABI_VERSION)
set(LIBCXX_LIBCPPABI_VERSION "2") # Default value
execute_process(
@ -153,29 +153,22 @@ if (LIBCXX_OSX_REEXPORT_SYSTEM_ABI_LIBRARY)
"target. If you need support for this, please contact "
"the libc++ maintainers.")
else()
if (DEFINED CMAKE_OSX_SYSROOT AND NOT CMAKE_OSX_SYSROOT STREQUAL "")
list(FIND CMAKE_OSX_ARCHITECTURES "armv7" OSX_HAS_ARMV7)
if (NOT OSX_HAS_ARMV7 EQUAL -1)
set(OSX_RE_EXPORT_LINE
"${CMAKE_OSX_SYSROOT}/usr/lib/libc++abi.dylib"
"-Wl,-reexported_symbols_list,${CMAKE_CURRENT_SOURCE_DIR}/libc++sjlj-abi.exp")
else()
set(OSX_RE_EXPORT_LINE
"-Wl,-reexport_library,${CMAKE_OSX_SYSROOT}/usr/lib/libc++abi.dylib")
endif()
if ("armv7" IN_LIST CMAKE_OSX_ARCHITECTURES)
set(RE_EXPORT_LIST "${CMAKE_CURRENT_SOURCE_DIR}/libc++sjlj-abi.exp")
else()
set(OSX_RE_EXPORT_LINE "/usr/lib/libc++abi.dylib -Wl,-reexported_symbols_list,${CMAKE_CURRENT_SOURCE_DIR}/libc++abi${LIBCXX_LIBCPPABI_VERSION}.exp")
if (NOT LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS)
add_link_flags("/usr/lib/libc++abi.dylib -Wl,-reexported_symbols_list,${CMAKE_CURRENT_SOURCE_DIR}/libc++abi-new-delete.exp")
endif()
set(RE_EXPORT_LIST "${CMAKE_CURRENT_SOURCE_DIR}/libc++abi${LIBCXX_LIBCPPABI_VERSION}.exp")
endif()
add_link_flags(
"-compatibility_version 1"
"-install_name /usr/lib/libc++.1.dylib"
"-Wl,-unexported_symbols_list,${CMAKE_CURRENT_SOURCE_DIR}/libc++unexp.exp"
"${OSX_RE_EXPORT_LINE}"
"-Wl,-reexported_symbols_list,${RE_EXPORT_LIST}"
"-Wl,-force_symbols_not_weak_list,${CMAKE_CURRENT_SOURCE_DIR}/notweak.exp"
"-Wl,-force_symbols_weak_list,${CMAKE_CURRENT_SOURCE_DIR}/weak.exp")
if (NOT LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS)
add_link_flags("-Wl,-reexported_symbols_list,${CMAKE_CURRENT_SOURCE_DIR}/libc++abi-new-delete.exp")
endif()
endif()
endif()