From 0d4fc2d795e35eb97862641e1d371c227f0a0386 Mon Sep 17 00:00:00 2001
From: Zachary Turner <zturner@google.com>
Date: Tue, 10 Feb 2015 05:04:25 +0000
Subject: [PATCH] Define HAVE_DIA_SDK on Windows when DIA is present.

This allows all CMake projects, as well as C++ code, to detect if
and when DIA SDK is available for use so that we can enable the
DIA-based PDB reader implementation.

Differential Revision: http://reviews.llvm.org/D7457
Reviewed By: Chandler Carruth

llvm-svn: 228669
---
 cmake/config-ix.cmake              | 16 ++++++++++++++++
 include/llvm/Config/config.h.cmake |  3 +++
 include/llvm/Config/config.h.in    |  3 +++
 3 files changed, 22 insertions(+)

diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index c845c070ecd..55727a85f37 100755
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -429,6 +429,22 @@ if( MSVC )
   set(SHLIBEXT ".lib")
   set(stricmp "_stricmp")
   set(strdup "_strdup")
+
+  # See if the DIA SDK is available and usable.
+  set(MSVC_DIA_SDK_DIR "$ENV{VSINSTALLDIR}DIA SDK")
+
+  # Due to a bug in MSVC 2013's installation software, it is possible
+  # for MSVC 2013 to write the DIA SDK into the Visual Studio 2012
+  # install directory.  If this happens, the installation is corrupt
+  # and there's nothing we can do.  It happens with enough frequency
+  # though that we should handle it.  We do so by simply checking that
+  # the DIA SDK folder exists.  Should this happen you will need to
+  # uninstall VS 2012 and then re-install VS 2013.
+  if (IS_DIRECTORY ${MSVC_DIA_SDK_DIR})
+    set(HAVE_DIA_SDK 1)
+  else()
+    set(HAVE_DIA_SDK 0)
+  endif()
 endif( MSVC )
 
 if( PURE_WINDOWS )
diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake
index c112ea2fc1c..e10df045b4b 100644
--- a/include/llvm/Config/config.h.cmake
+++ b/include/llvm/Config/config.h.cmake
@@ -55,6 +55,9 @@
    don't. */
 #cmakedefine01 HAVE_DECL_STRERROR_S
 
+/* Define to 1 if you have the DIA SDK installed, and to 0 if you don't. */
+#cmakedefine HAVE_DIA_SDK ${HAVE_DIA_SDK}
+
 /* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'.
    */
 #cmakedefine HAVE_DIRENT_H ${HAVE_DIRENT_H}
diff --git a/include/llvm/Config/config.h.in b/include/llvm/Config/config.h.in
index c68c77aa607..9827eeaea33 100644
--- a/include/llvm/Config/config.h.in
+++ b/include/llvm/Config/config.h.in
@@ -67,6 +67,9 @@
    don't. */
 #undef HAVE_DECL_STRERROR_S
 
+/* Define to 1 if you have the DIA SDK installed, and to 0 if you don't. */
+#undef HAVE_DIA_SDK
+
 /* Define to 1 if you have the <dirent.h> header file, and it defines `DIR'.
    */
 #undef HAVE_DIRENT_H