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Add CMake options for disabling ObjC++ entirely and for forcing the build of a separate libobjcxx.so.

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This commit is contained in:
theraven 2013-05-23 14:48:27 +00:00
parent 95204ad094
commit c37fdd98ad
1 changed files with 45 additions and 27 deletions
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72
CMakeLists.txt
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@ -174,34 +174,52 @@ set_source_files_properties(
# C++ Runtime interaction
#
# Try to find libcxxrt.so. We can link to this to provide the C++ ABI layer,
# if it exists.
find_library(CXX_RUNTIME cxxrt)
# If it doesn't, then look for GNU libsupc++.so instead (either works, they're
# ABI compatible).
if (NOT CXX_RUNTIME)
find_library(CXX_RUNTIME supc++)
endif (NOT CXX_RUNTIME)
set(ENABLE_OBJCXX true CACHE BOOL
"Enable support for Objective-C++")
set(FORCE_LIBOBJCXX false CACHE BOOL
"Force building a separate Objective-C++ runtime library")
if (ENABLE_OBJCXX)
# Try to find libcxxrt.so. We can link to this to provide the C++ ABI
# layer, if it exists.
find_library(CXX_RUNTIME cxxrt)
# If it doesn't, then look for GNU libsupc++.so instead (either works,
# they're ABI compatible).
if (NOT CXX_RUNTIME)
find_library(CXX_RUNTIME supc++)
endif (NOT CXX_RUNTIME)
# If we have a C++ ABI library, then we can produce a single libobjc that works
# for Objective-C and Objective-C++. If not, then we need to provide a
# separate libobjcxx.
if (CXX_RUNTIME)
message(STATUS "Using ${CXX_RUNTIME} as the C++ runtime library")
set(libobjc_CXX_SRCS ${libobjcxx_CXX_SRCS})
# We don't want to link the STL implementation (e.g. libstdc++) if we have
# a separate C++ runtime.
set(CMAKE_CXX_IMPLICIT_LINK_LIBRARIES "")
else (CXX_RUNTIME)
message(STATUS "No C++ runtime library found")
add_library(objcxx SHARED ${libobjcxx_CXX_SRCS})
set_target_properties(objcxx PROPERTIES
LINKER_LANGUAGE C
SOVERSION ${libobjc_VERSION}
)
set(CXX_RUNTIME "")
list(APPEND INSTALL_TARGETS objcxx)
endif (CXX_RUNTIME)
# If we have a C++ ABI library, then we can produce a single libobjc that
# works for Objective-C and Objective-C++. If not, then we need to provide
# a separate libobjcxx.
if (CXX_RUNTIME)
message(STATUS "Using ${CXX_RUNTIME} as the C++ runtime library")
if (FORCE_LIBOBJCXX)
message(STATUS "Forcing build of stand-alone libobjcxx")
add_library(objcxx SHARED ${libobjcxx_CXX_SRCS})
set_target_properties(objcxx PROPERTIES
LINKER_LANGUAGE C
SOVERSION ${libobjc_VERSION}
)
target_link_libraries(objcxx ${CXX_RUNTIME})
set(CXX_RUNTIME "")
list(APPEND INSTALL_TARGETS objcxx)
else ()
set(libobjc_CXX_SRCS ${libobjcxx_CXX_SRCS})
# We don't want to link the STL implementation (e.g. libstdc++) if
# we have a separate C++ runtime.
set(CMAKE_CXX_IMPLICIT_LINK_LIBRARIES "")
endif ()
else ()
message(STATUS "No C++ runtime library found")
add_library(objcxx SHARED ${libobjcxx_CXX_SRCS})
set_target_properties(objcxx PROPERTIES
LINKER_LANGUAGE C
SOVERSION ${libobjc_VERSION}
)
set(CXX_RUNTIME "")
list(APPEND INSTALL_TARGETS objcxx)
endif ()
endif (ENABLE_OBJCXX)