From 3e308c868e63089c1383dbb6786377eca06a53b1 Mon Sep 17 00:00:00 2001
From: NAKAMURA Takumi <geek4civic@gmail.com>
Date: Sun, 9 Feb 2014 16:36:28 +0000
Subject: [PATCH] Load exported lib and exe targets from LLVMConfig

Teach each package configuration file to load the LLVMExports file for
its corresponding tree.  This will allow application CMake code to use
logical library and executable target names from LLVM as if they were in
our own build process (e.g. LLVMSupport).  CMake will have enough
information to propagate LLVM library link dependencies automatically
while configuring applications.

Contributed by Brad King.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201051 91177308-0d34-0410-b5e6-96231b3b80d8
---
 cmake/modules/CMakeLists.txt      | 2 ++
 cmake/modules/LLVMConfig.cmake.in | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/cmake/modules/CMakeLists.txt b/cmake/modules/CMakeLists.txt
index 8a42548451c..6038cf3355a 100644
--- a/cmake/modules/CMakeLists.txt
+++ b/cmake/modules/CMakeLists.txt
@@ -31,6 +31,7 @@ set(LLVM_CONFIG_LIBRARY_DIRS
   "${LLVM_LIBRARY_DIR}"
   )
 set(LLVM_CONFIG_CMAKE_DIR "${CMAKE_CURRENT_SOURCE_DIR}")
+set(LLVM_CONFIG_EXPORTS_FILE "${llvm_cmake_builddir}/LLVMExports.cmake")
 configure_file(
   LLVMConfig.cmake.in
   ${llvm_cmake_builddir}/LLVMConfig.cmake
@@ -60,6 +61,7 @@ endforeach(p)
 set(LLVM_CONFIG_INCLUDE_DIRS "\${LLVM_INSTALL_PREFIX}/include")
 set(LLVM_CONFIG_LIBRARY_DIRS "\${LLVM_INSTALL_PREFIX}/lib")
 set(LLVM_CONFIG_CMAKE_DIR "\${LLVM_INSTALL_PREFIX}/${LLVM_INSTALL_PACKAGE_DIR}")
+set(LLVM_CONFIG_EXPORTS_FILE "\${LLVM_CMAKE_DIR}/LLVMExports.cmake")
 configure_file(
   LLVMConfig.cmake.in
   ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/LLVMConfig.cmake
diff --git a/cmake/modules/LLVMConfig.cmake.in b/cmake/modules/LLVMConfig.cmake.in
index 4687838a1e8..c1b6450ad68 100644
--- a/cmake/modules/LLVMConfig.cmake.in
+++ b/cmake/modules/LLVMConfig.cmake.in
@@ -43,4 +43,8 @@ set(LLVM_LIBRARY_DIRS "@LLVM_CONFIG_LIBRARY_DIRS@")
 set(LLVM_DEFINITIONS "-D__STDC_LIMIT_MACROS" "-D__STDC_CONSTANT_MACROS")
 set(LLVM_CMAKE_DIR "@LLVM_CONFIG_CMAKE_DIR@")
 
+if(NOT TARGET LLVMSupport)
+  include("@LLVM_CONFIG_EXPORTS_FILE@")
+endif()
+
 include(${LLVM_CMAKE_DIR}/LLVM-Config.cmake)
-- 
2.34.1