[CMake] Fix Xcode build with LLVM_ENABLE_OBJLIB.
This amends chapuni's r246156 to handle an Xcode quirk, one even called out
in the CMake documentation:
Some native build systems may not like targets that have only object files,
so consider adding at least one real source file to any target that
references $<TARGET_OBJECTS:objlib>.
I've limited the scope of this hack to Xcode for now.
llvm-svn: 247305
diff --git a/llvm/cmake/dummy.cpp b/llvm/cmake/dummy.cpp
new file mode 100644
index 0000000..c4e7e95
--- /dev/null
+++ b/llvm/cmake/dummy.cpp
@@ -0,0 +1 @@
+typedef int dummy;
diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
index 840a860..8ec6311 100644
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -590,6 +590,12 @@
add_windows_version_resource_file(ALL_FILES ${ALL_FILES})
+ if(XCODE)
+ # Note: the dummy.cpp source file provides no definitions. However,
+ # it forces Xcode to properly link the static library.
+ list(APPEND ALL_FILES "${LLVM_SOURCE_DIR}/cmake/dummy.cpp")
+ endif()
+
if( EXCLUDE_FROM_ALL )
add_executable(${name} EXCLUDE_FROM_ALL ${ALL_FILES})
else()