gn build: Make setting llvm_enable_dia_sdk=true work

If this is set, %INCLUDE% must contain ".../DIA SDK/include"
and %LIB% must contain ".../DIA SKD/lib/amd64" (assuming you're doing a
64-bit build).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@359195 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn b/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
index 3b78c39..34be74c 100644
--- a/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
+++ b/utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
@@ -1,4 +1,5 @@
 import("//llvm/lib/Target/targets.gni")
+import("//llvm/lib/DebugInfo/PDB/enable_dia.gni")
 import("//llvm/triples.gni")
 import("//llvm/utils/gn/build/buildflags.gni")
 import("//llvm/utils/gn/build/libs/edit/enable.gni")
@@ -77,7 +78,6 @@
     "HAVE_CRASHREPORTERCLIENT_H=",
     "HAVE_DECL_FE_ALL_EXCEPT=1",
     "HAVE_DECL_FE_INEXACT=1",
-    "LLVM_ENABLE_DIA_SDK=",
     "LLVM_ENABLE_CRASH_DUMPS=",
     "HAVE_ERRNO_H=1",
     "HAVE_FCNTL_H=1",
@@ -297,6 +297,12 @@
     values += [ "HAVE_TERMINFO=" ]
   }
 
+  if (llvm_enable_dia_sdk) {
+    values += [ "LLVM_ENABLE_DIA_SDK=1" ]
+  } else {
+    values += [ "LLVM_ENABLE_DIA_SDK=" ]
+  }
+
   if (llvm_enable_zlib) {
     values += [ "LLVM_ENABLE_ZLIB=1" ]
   } else {
diff --git a/utils/gn/secondary/llvm/lib/DebugInfo/PDB/BUILD.gn b/utils/gn/secondary/llvm/lib/DebugInfo/PDB/BUILD.gn
index 6305768..59fe339 100644
--- a/utils/gn/secondary/llvm/lib/DebugInfo/PDB/BUILD.gn
+++ b/utils/gn/secondary/llvm/lib/DebugInfo/PDB/BUILD.gn
@@ -113,6 +113,6 @@
       "DIA/DIASourceFile.cpp",
       "DIA/DIATable.cpp",
     ]
-    # FIXME: Link against the right diaguids.lib too.
+    libs =  [ "diaguids.lib" ]
   }
 }