FIXME: It should work on not only Linux but elf-targeting gnu ld.
For example if LLVM_DYLIB_COMPONENTS is "BitWriter Support", CMake emits the command line like;
-Wl,--whole-archive
lib/libLLVMBitWriter.a
lib/libLLVMSupport.a *1
-Wl,--no-whole-archive
lib/libLLVMCore.a
lib/libLLVMSupport.a *2
-lrt -ldl -ltinfo -lpthread -lm
It works since symbols in LLVMCore is resolved with not *2 but *1.
Unfortunately, --gc-sections is not powerful in this case to prune unused "visibility(default)" entries.
I am still experimenting other way not to rely on --whole-archive.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@221591
91177308-0d34-0410-b5e6-
96231b3b80d8
# LLVM components. All compoenent names handled by llvm-config are valid.
if(NOT DEFINED LLVM_DYLIB_COMPONENTS)
# LLVM components. All compoenent names handled by llvm-config are valid.
if(NOT DEFINED LLVM_DYLIB_COMPONENTS)
- set(LLVM_LINK_COMPONENTS
+ set(LLVM_DYLIB_COMPONENTS
${LLVM_TARGETS_TO_BUILD}
Analysis
AsmPrinter
${LLVM_TARGETS_TO_BUILD}
Analysis
AsmPrinter
-else()
- set(LLVM_LINK_COMPONENTS ${LLVM_DYLIB_COMPONENTS})
endif()
add_definitions( -DLLVM_VERSION_INFO=\"${PACKAGE_VERSION}\" )
endif()
add_definitions( -DLLVM_VERSION_INFO=\"${PACKAGE_VERSION}\" )
set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm.exports)
set(LLVM_EXPORTED_SYMBOL_FILE ${CMAKE_BINARY_DIR}/libllvm.exports)
- llvm_map_components_to_libnames(LIB_NAMES ${LLVM_LINK_COMPONENTS})
+ llvm_map_components_to_libnames(LIB_NAMES ${LLVM_DYLIB_COMPONENTS})
foreach (lib ${LIB_NAMES})
foreach (lib ${LIB_NAMES})
add_llvm_library(LLVM SHARED ${SOURCES})
add_llvm_library(LLVM SHARED ${SOURCES})
+if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux") # FIXME: It should be "GNU ld for elf"
+ # GNU ld doesn't resolve symbols in the version script.
+ list(REMOVE_DUPLICATES LIB_NAMES)
+ set(LIB_NAMES -Wl,--whole-archive ${LIB_NAMES} -Wl,--no-whole-archive)
+endif()
+
+target_link_libraries(LLVM ${cmake_2_8_12_PRIVATE} ${LIB_NAMES})
+
add_dependencies(LLVM ${LLVM_EXPORTED_SYMBOL_FILE})
if (APPLE)
add_dependencies(LLVM ${LLVM_EXPORTED_SYMBOL_FILE})
if (APPLE)