[CMake] Support statically linking dependencies only to shared or static library
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
git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@337668 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CMakeLists.txt b/CMakeLists.txt
index caadb79..adfe8c6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -84,6 +84,13 @@
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.
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 5a929cf..75c7e6d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -61,19 +61,27 @@
# 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(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 @@
# 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
