set(LLVM_COMMON_DEPENDS ${LLVM_COMMON_DEPENDS} PARENT_SCOPE)
endfunction(add_llvm_symbol_exports)
+if(NOT WIN32 AND NOT APPLE)
+ execute_process(
+ COMMAND ${CMAKE_C_COMPILER} -Wl,--version
+ OUTPUT_VARIABLE stdout
+ )
+ if("${stdout}" MATCHES "GNU gold")
+ set(LLVM_LINKER_IS_GOLD ON)
+ endif()
+endif()
+
function(add_link_opts target_name)
# Pass -O3 to the linker. This enabled different optimizations on different
# linkers.
LINK_FLAGS " -Wl,-O3")
endif()
+ if(LLVM_LINKER_IS_GOLD)
+ # With gold gc-sections is always safe.
+ set_property(TARGET ${target_name} APPEND_STRING PROPERTY
+ LINK_FLAGS " -Wl,--gc-sections")
+ # Note that there is a bug with -Wl,--icf=safe so it is not safe
+ # to enable. See https://sourceware.org/bugzilla/show_bug.cgi?id=17704.
+ endif()
+
if(NOT LLVM_NO_DEAD_STRIP)
if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
# ld64's implementation of -dead_strip breaks tools that use plugins.
set_property(TARGET ${target_name} APPEND_STRING PROPERTY
LINK_FLAGS " -Wl,-dead_strip")
- elseif(NOT WIN32)
+ elseif(NOT WIN32 AND NOT LLVM_LINKER_IS_GOLD)
# Object files are compiled with -ffunction-data-sections.
# Versions of bfd ld < 2.23.1 have a bug in --gc-sections that breaks
# tools that use plugins. Always pass --gc-sections once we require
set(binpath ${CMAKE_BINARY_DIR}/bin/${binary}${CMAKE_EXECUTABLE_SUFFIX})
set(cc "${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1}")
set(cxx "${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1}")
+ set(cppflags "")
+ get_property(include_dirs DIRECTORY PROPERTY INCLUDE_DIRECTORIES)
+ foreach(d ${include_dirs})
+ set(cppflags "${cppflags} -I${d}")
+ endforeach(d)
set(ldflags "${CMAKE_EXE_LINKER_FLAGS}")
add_custom_command(OUTPUT ${binpath}
- COMMAND ${CMAKE_BINARY_DIR}/bin/llvm-go "cc=${cc}" "cxx=${cxx}" "ldflags=${ldflags}"
+ COMMAND ${CMAKE_BINARY_DIR}/bin/llvm-go "cc=${cc}" "cxx=${cxx}" "cppflags=${cppflags}" "ldflags=${ldflags}"
${ARG_GOFLAGS} build -o ${binpath} ${pkgpath}
DEPENDS llvm-config ${CMAKE_BINARY_DIR}/bin/llvm-go${CMAKE_EXECUTABLE_SUFFIX}
${llvmlibs} ${ARG_DEPENDS}