From d5fbfcb7b7da0d4c384245ae115bdb1ab737c85a Mon Sep 17 00:00:00 2001
From: Richard Roberts <richard.jw.roberts@gmail.com>
Date: Tue, 19 Jun 2012 22:06:40 +0000
Subject: [PATCH] Create and load CMake exports and config files

---
 CMakeLists.txt                | 8 ++++----
 CppUnitLite/CMakeLists.txt    | 4 +++-
 gtsam/CMakeLists.txt          | 8 ++++++--
 gtsam_unstable/CMakeLists.txt | 8 ++++++--
 4 files changed, 19 insertions(+), 9 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c843030e4..fb25d2dd8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,7 @@ set (GTSAM_VERSION_PATCH 0)
 #set (CMAKE_INSTALL_PREFIX ${HOME} CACHE PATH "Install prefix for library")
 
 set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+include(GtsamMakeConfigFile)
 
 # Record the root dir for gtsam - needed during external builds, e.g., ROS
 set(GTSAM_SOURCE_ROOT_DIR ${CMAKE_CURRENT_SOURCE_DIR})
@@ -139,10 +140,9 @@ if (GTSAM_BUILD_UNSTABLE)
     add_subdirectory(gtsam_unstable)
 endif(GTSAM_BUILD_UNSTABLE)
 
-# Make config files
-include(GtsamMakeConfigFile)
-GtsamMakeConfigFile(GTSAM gtsam-static)
-GtsamMakeConfigFile(CppUnitLite CppUnitLite)
+# Install config and export files
+GtsamMakeConfigFile(GTSAM)
+export(TARGETS ${GTSAM_EXPORTED_TARGETS} FILE GTSAM-exports.cmake)
 
 # Set up CPack
 set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "GTSAM")
diff --git a/CppUnitLite/CMakeLists.txt b/CppUnitLite/CMakeLists.txt
index 534a802d4..35ecd71f8 100644
--- a/CppUnitLite/CMakeLists.txt
+++ b/CppUnitLite/CMakeLists.txt
@@ -4,11 +4,13 @@ file(GLOB cppunitlite_headers "*.h")
 file(GLOB cppunitlite_src "*.cpp")
 
 add_library(CppUnitLite STATIC ${cppunitlite_src} ${cppunitlite_headers})
+list(APPEND GTSAM_EXPORTED_TARGETS CppUnitLite)
+set(GTSAM_EXPORTED_TARGETS "${GTSAM_EXPORTED_TARGETS}" PARENT_SCOPE)
 
 gtsam_assign_source_folders("${cppunitlite_headers};${cppunitlite_src}") # MSVC project structure
 
 option(GTSAM_INSTALL_CPPUNITLITE "Enable/Disable installation of CppUnitLite library" ON)
 if (GTSAM_INSTALL_CPPUNITLITE)
     install(FILES ${cppunitlite_headers} DESTINATION include/CppUnitLite)
-    install(TARGETS CppUnitLite ARCHIVE DESTINATION lib)
+    install(TARGETS CppUnitLite EXPORT GTSAM-exports ARCHIVE DESTINATION lib)
 endif(GTSAM_INSTALL_CPPUNITLITE)
diff --git a/gtsam/CMakeLists.txt b/gtsam/CMakeLists.txt
index 495c3f39f..b4fae3475 100644
--- a/gtsam/CMakeLists.txt
+++ b/gtsam/CMakeLists.txt
@@ -91,7 +91,9 @@ if (GTSAM_BUILD_STATIC_LIBRARY)
         CLEAN_DIRECT_OUTPUT 1
     	VERSION             ${gtsam_version}
      	SOVERSION           ${gtsam_soversion})
-    install(TARGETS gtsam-static ARCHIVE DESTINATION lib)
+    install(TARGETS gtsam-static EXPORT GTSAM-exports ARCHIVE DESTINATION lib)
+    list(APPEND GTSAM_EXPORTED_TARGETS gtsam-static)
+    set(GTSAM_EXPORTED_TARGETS "${GTSAM_EXPORTED_TARGETS}" PARENT_SCOPE)
     set(gtsam-lib "gtsam-static")
 endif (GTSAM_BUILD_STATIC_LIBRARY)
 
@@ -104,7 +106,9 @@ if (GTSAM_BUILD_SHARED_LIBRARY)
         CLEAN_DIRECT_OUTPUT 1
     	VERSION             ${gtsam_version}
      	SOVERSION           ${gtsam_soversion})
-    install(TARGETS gtsam-shared LIBRARY DESTINATION lib ARCHIVE DESTINATION lib RUNTIME DESTINATION bin)
+    install(TARGETS gtsam-shared EXPORT GTSAM-exports LIBRARY DESTINATION lib ARCHIVE DESTINATION lib RUNTIME DESTINATION bin)
+    list(APPEND GTSAM_EXPORTED_TARGETS gtsam-shared)
+    set(GTSAM_EXPORTED_TARGETS "${GTSAM_EXPORTED_TARGETS}" PARENT_SCOPE)
     if (NOT GTSAM_BUILD_STATIC_LIBRARY)
         set(gtsam-lib "gtsam-shared")
     endif()
diff --git a/gtsam_unstable/CMakeLists.txt b/gtsam_unstable/CMakeLists.txt
index 1c781453a..acd36ddc2 100644
--- a/gtsam_unstable/CMakeLists.txt
+++ b/gtsam_unstable/CMakeLists.txt
@@ -54,7 +54,9 @@ set_target_properties(gtsam_unstable-static PROPERTIES
  	SOVERSION           ${gtsam_unstable_soversion})
 target_link_libraries(gtsam_unstable-static gtsam-static)
 set(gtsam_unstable-lib "gtsam_unstable-static")
-install(TARGETS gtsam_unstable-static ARCHIVE DESTINATION lib)
+install(TARGETS gtsam_unstable-static EXPORT GTSAM-exports ARCHIVE DESTINATION lib)
+list(APPEND GTSAM_EXPORTED_TARGETS gtsam_unstable-static)
+set(GTSAM_EXPORTED_TARGETS "${GTSAM_EXPORTED_TARGETS}" PARENT_SCOPE)
 
 if (GTSAM_UNSTABLE_BUILD_SHARED_LIBRARY)
     message(STATUS "Building GTSAM_UNSTABLE - shared")
@@ -65,7 +67,9 @@ if (GTSAM_UNSTABLE_BUILD_SHARED_LIBRARY)
     	VERSION             ${gtsam_unstable_version}
      	SOVERSION           ${gtsam_unstable_soversion})
     target_link_libraries(gtsam_unstable-shared gtsam-shared)
-    install(TARGETS gtsam_unstable-shared LIBRARY DESTINATION lib ARCHIVE DESTINATION lib RUNTIME DESTINATION bin)
+    install(TARGETS gtsam_unstable-shared EXPORT GTSAM-exports LIBRARY DESTINATION lib ARCHIVE DESTINATION lib RUNTIME DESTINATION bin)
+    list(APPEND GTSAM_EXPORTED_TARGETS gtsam_unstable-shared)
+    set(GTSAM_EXPORTED_TARGETS "${GTSAM_EXPORTED_TARGETS}" PARENT_SCOPE)
 endif(GTSAM_UNSTABLE_BUILD_SHARED_LIBRARY)
 
 # Wrap version for gtsam_unstable