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[CMake] Support statically linking dependencies only to shared or static library

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Currently it's possible to select whether to statically link unwinder
or the C++ ABI library, but this option applies to both the shared
and static library. However, in some scenarios it may be desirable to
only statically link unwinder and C++ ABI library into static C++
library since for shared C++ library we can rely on dynamic linking
and linker scripts. This change enables selectively enabling or
disabling statically linking only to shared or static library.

Differential Revision: https://reviews.llvm.org/D49502

llvm-svn: 337668
This commit is contained in:
Petr Hosek 2018-07-23 04:19:55 +00:00
parent 0477b40137
commit 7a0295cbc8
5 changed files with 38 additions and 15 deletions
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8
libcxx/CMakeLists.txt
View File

@ -155,6 +155,14 @@ endif()
# cannot be used with LIBCXX_ENABLE_ABI_LINKER_SCRIPT.
option(LIBCXX_ENABLE_STATIC_ABI_LIBRARY "Statically link the ABI library" OFF)
cmake_dependent_option(LIBCXX_STATICALLY_LINK_ABI_IN_STATIC_LIBRARY
"Statically link the ABI library to static library" ON
"LIBCXX_ENABLE_STATIC_ABI_LIBRARY;LIBCXX_ENABLE_STATIC" OFF)
cmake_dependent_option(LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY
"Statically link the ABI library to shared library" ON
"LIBCXX_ENABLE_STATIC_ABI_LIBRARY;LIBCXX_ENABLE_STATIC" OFF)
# Generate and install a linker script inplace of libc++.so. The linker script
# will link libc++ to the correct ABI library. This option is on by default
# on UNIX platforms other than Apple unless 'LIBCXX_ENABLE_STATIC_ABI_LIBRARY'

6
libcxx/cmake/Modules/HandleLibCXXABI.cmake
View File

@ -96,10 +96,10 @@ if ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libstdc++" OR
elseif ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libcxxabi")
if (LIBCXX_CXX_ABI_INTREE)
# Link against just-built "cxxabi" target.
if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
set(CXXABI_LIBNAME cxxabi_static)
if (LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY)
set(CXXABI_LIBNAME cxxabi_static)
else()
set(CXXABI_LIBNAME cxxabi_shared)
set(CXXABI_LIBNAME cxxabi_shared)
endif()
set(LIBCXX_LIBCPPABI_VERSION "2" PARENT_SCOPE)
else()

6
libcxx/lib/CMakeLists.txt
View File

@ -44,7 +44,7 @@ if (APPLE AND (LIBCXX_CXX_ABI_LIBNAME STREQUAL "libcxxabi" OR
set(LIBCXX_OSX_REEXPORT_SYSTEM_ABI_LIBRARY ON)
endif()
if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
if (LIBCXX_STATICALLY_LINK_ABI_IN_SHARED_LIBRARY)
add_library_flags("-Wl,--whole-archive" "-Wl,-Bstatic")
add_library_flags("${LIBCXX_CXX_ABI_LIBRARY}")
add_library_flags("-Wl,-Bdynamic" "-Wl,--no-whole-archive")
@ -259,14 +259,14 @@ if (LIBCXX_ENABLE_STATIC)
list(APPEND LIBCXX_TARGETS "cxx_static")
# Attempt to merge the libc++.a archive and the ABI library archive into one.
if (LIBCXX_ENABLE_STATIC_ABI_LIBRARY)
if (LIBCXX_STATICALLY_LINK_ABI_IN_STATIC_LIBRARY)
set(MERGE_ARCHIVES_SEARCH_PATHS "")
if (LIBCXX_CXX_ABI_LIBRARY_PATH)
set(MERGE_ARCHIVES_SEARCH_PATHS "-L${LIBCXX_CXX_ABI_LIBRARY_PATH}")
endif()
if ((TARGET ${LIBCXX_CXX_ABI_LIBRARY}) OR
(${LIBCXX_CXX_ABI_LIBRARY} MATCHES "cxxabi(_static|_shared)?" AND HAVE_LIBCXXABI))
set(MERGE_ARCHIVES_ABI_TARGET "$<TARGET_LINKER_FILE:${LIBCXX_CXX_ABI_LIBRARY}>")
set(MERGE_ARCHIVES_ABI_TARGET "$<TARGET_LINKER_FILE:cxxabi_static>")
else()
set(MERGE_ARCHIVES_ABI_TARGET
"${CMAKE_STATIC_LIBRARY_PREFIX}${LIBCXX_CXX_ABI_LIBRARY}${CMAKE_STATIC_LIBRARY_SUFFIX}")

7
libcxxabi/CMakeLists.txt
View File

@ -84,6 +84,13 @@ set(LIBCXXABI_LIBCXX_LIBRARY_PATH "" CACHE PATH "The path to libc++ library.")
option(LIBCXXABI_ENABLE_SHARED "Build libc++abi as a shared library." ON)
option(LIBCXXABI_ENABLE_STATIC "Build libc++abi as a static library." ON)
cmake_dependent_option(LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY
"Statically link the LLVM unwinder to static library" ON
"LIBCXXABI_ENABLE_STATIC_UNWINDER;LIBCXXABI_ENABLE_STATIC" OFF)
cmake_dependent_option(LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_SHARED_LIBRARY
"Statically link the LLVM unwinder to shared library" ON
"LIBCXXABI_ENABLE_STATIC_UNWINDER;LIBCXXABI_ENABLE_SHARED" OFF)
option(LIBCXXABI_BAREMETAL "Build libc++abi for baremetal targets." OFF)
# The default terminate handler attempts to demangle uncaught exceptions, which
# causes extra I/O and demangling code to be pulled in.

26
libcxxabi/src/CMakeLists.txt
View File

@ -61,19 +61,27 @@ if (LIBCXXABI_USE_LLVM_UNWINDER)
# Prefer using the in-tree version of libunwind, either shared or static. If
# none are found fall back to using -lunwind.
# FIXME: Is it correct to prefer the static version of libunwind?
if (NOT LIBCXXABI_ENABLE_STATIC_UNWINDER AND (TARGET unwind_shared OR HAVE_LIBUNWIND))
list(APPEND LIBCXXABI_LIBRARIES unwind_shared)
elseif (LIBCXXABI_ENABLE_STATIC_UNWINDER AND (TARGET unwind_static OR HAVE_LIBUNWIND))
list(APPEND LIBCXXABI_LIBRARIES unwind_static)
if (NOT LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_SHARED_LIBRARY AND (TARGET unwind_shared OR HAVE_LIBUNWIND))
list(APPEND LIBCXXABI_SHARED_LIBRARIES unwind_shared)
elseif (LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_SHARED_LIBRARY AND (TARGET unwind_static OR HAVE_LIBUNWIND))
list(APPEND LIBCXXABI_SHARED_LIBRARIES unwind_static)
else()
list(APPEND LIBCXXABI_LIBRARIES unwind)
list(APPEND LIBCXXABI_SHARED_LIBRARIES unwind)
endif()
if (NOT LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY AND (TARGET unwind_shared OR HAVE_LIBUNWIND))
list(APPEND LIBCXXABI_STATIC_LIBRARIES unwind_shared)
elseif (LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY AND (TARGET unwind_static OR HAVE_LIBUNWIND))
# We handle this by directly merging libunwind objects into libc++abi.
else()
list(APPEND LIBCXXABI_STATIC_LIBRARIES unwind)
endif()
else()
add_library_flags_if(LIBCXXABI_HAS_GCC_S_LIB gcc_s)
endif()
if (MINGW)
# MINGW_LIBRARIES is defined in config-ix.cmake
list(APPEND LIBCXXABI_LIBRARIES ${MINGW_LIBRARIES})
list(APPEND LIBCXXABI_SHARED_LIBRARIES ${MINGW_LIBRARIES})
list(APPEND LIBCXXABI_STATIC_LIBRARIES ${MINGW_LIBRARIES})
endif()
# Setup flags.
@ -130,7 +138,7 @@ if (LIBCXXABI_ENABLE_SHARED)
if(COMMAND llvm_setup_rpath)
llvm_setup_rpath(cxxabi_shared)
endif()
target_link_libraries(cxxabi_shared ${LIBCXXABI_LIBRARIES})
target_link_libraries(cxxabi_shared ${LIBCXXABI_SHARED_LIBRARIES})
set_target_properties(cxxabi_shared
PROPERTIES
CXX_EXTENSIONS
@ -155,13 +163,13 @@ endif()
# Build the static library.
if (LIBCXXABI_ENABLE_STATIC)
set(cxxabi_static_sources $<TARGET_OBJECTS:cxxabi_objects>)
if (LIBCXXABI_USE_LLVM_UNWINDER AND LIBCXXABI_ENABLE_STATIC_UNWINDER)
if (LIBCXXABI_USE_LLVM_UNWINDER AND LIBCXXABI_STATICALLY_LINK_UNWINDER_IN_STATIC_LIBRARY)
if (TARGET unwind_static OR HAVE_LIBUNWIND)
list(APPEND cxxabi_static_sources $<TARGET_OBJECTS:unwind_objects>)
endif()
endif()
add_library(cxxabi_static STATIC ${cxxabi_static_sources})
target_link_libraries(cxxabi_static ${LIBCXXABI_LIBRARIES})
target_link_libraries(cxxabi_static ${LIBCXXABI_STATIC_LIBRARIES})
set_target_properties(cxxabi_static
PROPERTIES
CXX_EXTENSIONS