Export BLT targets

CMakeLists.txt

@@ -17,6 +17,7 @@ cmake_minimum_required(VERSION 3.14)
 include(cmake/SetupChaiOptions.cmake)
 
 set(BLT_CXX_STD c++14 CACHE STRING "")
+set(BLT_EXPORT_THIRDPARTY On CACHE BOOL "")
 
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "PGI")
   message(STATUS "Setting CMAKE_CXX_EXTENSIONS to ON for PGI Compiler")

cmake/thirdparty/SetupChaiThirdparty.cmake

@@ -68,3 +68,13 @@ if (CHAI_ENABLE_RAJA_PLUGIN)
     message(STATUS "CHAI: using existing RAJA target")
   endif()
 endif ()
+
+set(CHAI_NEEDS_BLT_TPLS False) 
+ if (CHAI_ENABLE_MPI OR CHAI_ENABLE_HIP OR CHAI_ENABLE_OPENMP OR CHAI_ENABLE_CUDA)
+   set(CHAI_NEEDS_BLT_TPLS True)
+ endif ()
+
+ if (CHAI_NEEDS_BLT_TPLS)
+   blt_export_tpl_targets(EXPORT chai-blt-targets NAMESPACE chai)
+   install(EXPORT chai-blt-targets DESTINATION lib/cmake/chai)
+ endif()

src/chai/CMakeLists.txt

@@ -81,13 +81,16 @@ target_include_directories(
   $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include>
   $<INSTALL_INTERFACE:include>)
 
-configure_file(
-  ${PROJECT_SOURCE_DIR}/src/chai/chai-config.cmake.in
-  ${PROJECT_BINARY_DIR}/share/chai/cmake/chai-config.cmake)
+include(CMakePackageConfigHelpers)
+configure_package_config_file(
+  "${PROJECT_SOURCE_DIR}/src/chai/chai-config.cmake.in"
+  "${PROJECT_BINARY_DIR}/chai-config.cmake"
+  PATH_VARS CMAKE_INSTALL_PREFIX
+  INSTALL_DESTINATION lib/cmake/chai)
 
 install(
-  FILES ${PROJECT_BINARY_DIR}/share/chai/cmake/chai-config.cmake
-  DESTINATION share/chai/cmake/)
+  FILES ${PROJECT_BINARY_DIR}/chai-config.cmake
+  DESTINATION lib/cmake/chai)
 
 install(
   FILES ${PROJECT_BINARY_DIR}/include/chai/config.hpp

src/chai/chai-config.cmake.in

@@ -5,9 +5,44 @@
 # SPDX-License-Identifier: BSD-3-Clause
 ##############################################################################
 
-set (CHAI_INSTALL_PREFIX @CMAKE_INSTALL_PREFIX@)
-set (CHAI_INCLUDE_DIRS @CMAKE_INSTALL_PREFIX@/include)
-set (CHAI_LIB_DIR @CMAKE_INSTALL_PREFIX@/lib)
-set (CHAI_CMAKE_DIR @CMAKE_INSTALL_PREFIX@/share/chai/cmake)
+@PACKAGE_INIT@
+
+include(CMakeFindDependencyMacro)
 
-include(@CMAKE_INSTALL_PREFIX@/share/chai/cmake/chai-targets.cmake)
+if (@CHAI_NEEDS_BLT_TPLS@)
+  include("${CMAKE_CURRENT_LIST_DIR}/chai-blt-targets.cmake")
+
+  if (@CHAI_ENABLE_CUDA@)
+    find_dependency(Threads)
+  endif ()
+endif()
+
+if (NOT TARGET umpire)
+  set(CHAI_UMPIRE_DIR "@umpire_DIR@")
+  if(NOT umpire_DIR) 
+    set(umpire_DIR ${CHAI_UMPIRE_DIR}) 
+  endif()
+
+  find_dependency(umpire CONFIG NO_DEFAULT_PATH PATHS 
+    ${umpire_DIR}
+    ${umpire_DIR}/lib/cmake/umpire
+    @PACKAGE_CMAKE_INSTALL_PREFIX@
+    @PACKAGE_CMAKE_INSTALL_PREFIX@/lib/cmake/umpire)
+endif ()
+
+if (NOT TARGET RAJA)
+  set(CHAI_RAJA_DIR "@RAJA_DIR@")
+  if(NOT RAJA_DIR) 
+    set(RAJA_DIR ${CHAI_UMPIRE_DIR}) 
+  endif()
+
+  find_dependency(RAJA CONFIG NO_DEFAULT_PATH PATHS 
+    ${RAJA_DIR}
+    ${RAJA_DIR}/lib/cmake/raja
+    @PACKAGE_CMAKE_INSTALL_PREFIX@
+    @PACKAGE_CMAKE_INSTALL_PREFIX@/lib/cmake/raja)
+endif ()
+
+include("${CMAKE_CURRENT_LIST_DIR}/chai-targets.cmake")
+
+check_required_components(@PROJECT_NAME@)