Have llvm-c-test only use libLLVM if libLLVM has all the right components.

Summary: We should only have llvm-c-test use libLLVM if the library is built with the default set of components or if LLVM_DYLIB_COMPONENTS includes all the LLVM_LINK_COMPONENTS required for llvm-c-test. Making libLLVM always used causes build failures if libLLVM doesn't include all

Reviewers: chapuni, ributzka

Reviewed By: ributzka

Subscribers: ributzka, llvm-commits

Differential Revision: http://reviews.llvm.org/D6668

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224541 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-c-test/CMakeLists.txt

@@ -7,7 +7,26 @@ set(LLVM_LINK_COMPONENTS
   Target
   )
 
-if(TARGET LLVM)
+# We should only have llvm-c-test use libLLVM if libLLVM is built with the
+# default list of components. Using libLLVM with custom components can result in
+# build failures.
+
+set (USE_LLVM_DYLIB FALSE)
+
+if (TARGET LLVM)
+  set (USE_LLVM_DYLIB TRUE)
+  if (DEFINED LLVM_DYLIB_COMPONENTS)
+    foreach(c in ${LLVM_LINK_COMPONENTS})
+      list(FIND LLVM_DYLIB_COMPONENTS ${c} C_IDX)
+      if (C_IDX EQUAL -1)
+        set(USE_LLVM_DYLIB FALSE)
+        break()
+      endif()
+    endforeach()
+  endif()
+endif()
+
+if(USE_LLVM_DYLIB)
   set(LLVM_LINK_COMPONENTS)
 endif()
 
@@ -26,7 +45,6 @@ add_llvm_tool(llvm-c-test
   targets.c
   )
 
-# Use libLLVM.so if it is available.
+if(USE_LLVM_DYLIB)
-if(TARGET LLVM)
   target_link_libraries(llvm-c-test LLVM)
 endif()