X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=tools%2Fgold%2FCMakeLists.txt;h=2cc132ff78e4019d126c448b261b1ccbeb30d7ec;hb=7a88b655ccad0f128ea1a5e8ca433a8827a24ff3;hp=15ca8d7f8f6f18d637f2d54d973aff422f46c222;hpb=aa1fbb40ad432479972971cc877cb4109bd59649;p=oota-llvm.git

diff --git a/tools/gold/CMakeLists.txt b/tools/gold/CMakeLists.txt
index 15ca8d7f8f6..2cc132ff78e 100644
--- a/tools/gold/CMakeLists.txt
+++ b/tools/gold/CMakeLists.txt
@@ -1,7 +1,9 @@
-set(LLVM_BINUTILS_INCDIR "/usr/include" CACHE PATH
+set(LLVM_BINUTILS_INCDIR "" CACHE PATH
   "PATH to binutils/include containing plugin-api.h for gold plugin.")
 
-if( NOT EXISTS "${LLVM_BINUTILS_INCDIR}/plugin-api.h" )
+if( NOT LLVM_BINUTILS_INCDIR )
+  # Nothing to say.
+elseif( NOT EXISTS "${LLVM_BINUTILS_INCDIR}/plugin-api.h" )
   message(STATUS "plugin-api.h not found. gold plugin excluded from the build.")
 else()
   include_directories( ${LLVM_BINUTILS_INCDIR} )
@@ -32,6 +34,13 @@ else()
   set_property(DIRECTORY APPEND
     PROPERTY ADDITIONAL_MAKE_CLEAN_FILES exportsfile)
 
-  target_link_libraries(LLVMgold LTO -Wl,--version-script,exportsfile)
+  # Force re-linking when the exports file changes. Actually, it
+  # forces recompilation of gold-plugin.cpp. The LINK_DEPENDS target
+  # property only works for makefile-based generators.
+  set_property(SOURCE gold-plugin.cpp APPEND PROPERTY
+    OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/exportsfile)
+
+  target_link_libraries(LLVMgold LTO
+                   -Wl,--version-script,${CMAKE_CURRENT_BINARY_DIR}/exportsfile)
   add_dependencies(LLVMgold gold_exports)
 endif()