Only load BLT once (LLNL#70)

evaleev · Aug 2, 2017 · db6c97a · db6c97a
1 parent 54c2497
commit db6c97a
Showing 1 changed file with 143 additions and 137 deletions.
diff --git a/SetupBLT.cmake b/SetupBLT.cmake
@@ -40,140 +40,146 @@
 #
 ###############################################################################
 
-set( BLT_ROOT_DIR ${CMAKE_CURRENT_LIST_DIR} CACHE PATH "" FORCE )
-
-################################
-# Prevent in-source builds
-################################
-# Fail if someone tries to config an in-source build.
-if("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
-   message(FATAL_ERROR "In-source builds are not supported. Please remove "
-                       "CMakeCache.txt from the 'src' dir and configure an "
-                       "out-of-source build in another directory.")
-endif()
-
-################################
-# Setup build options and their default values
-################################
-include(${BLT_ROOT_DIR}/cmake/BLTOptions.cmake)
-
-################################
-# Invoke CMake Fortran setup
-# if ENABLE_FORTRAN == ON
-################################
-if(ENABLE_FORTRAN)
-    enable_language(Fortran)
-endif()
-
-################################
-# Enable ctest support 
-################################
-if(ENABLE_TESTS)
-    enable_testing()
-endif()
-
-################################
-# Macros
-################################
-include(${BLT_ROOT_DIR}/cmake/BLTMacros.cmake)
-
-################################
-# Standard TPL support
-################################
-include(${BLT_ROOT_DIR}/cmake/thirdparty/SetupThirdParty.cmake)
-
-################################
-# Setup docs targets
-################################
-include(${BLT_ROOT_DIR}/cmake/SetupDocs.cmake)
-
-################################
-# Setup source checks
-################################
-include(${BLT_ROOT_DIR}/cmake/SetupCodeChecks.cmake)
-
-################################
-# Standard Build Layout
-################################
-
-# Defines the layout of the build directory. Namely,
-# it indicates the location where the various header files should go,
-# where to store libraries (static or shared), the location of the
-# bin directory for all executables and the location for fortran modules.
-
-# Set the path where all the headers will be stored
-if ( ENABLE_COPY_HEADERS )
-    set(HEADER_INCLUDES_DIRECTORY
-        ${PROJECT_BINARY_DIR}/include/
-        CACHE PATH
-        "Directory where all headers will go in the build tree"
-        )
-    include_directories(${HEADER_INCLUDES_DIRECTORY})
-endif()
-
-# Set the path where all the libraries will be stored
-set(LIBRARY_OUTPUT_PATH
-    ${PROJECT_BINARY_DIR}/lib
-    CACHE PATH
-    "Directory where compiled libraries will go in the build tree"
-    )
-
-# Set the path where all the installed executables will go
-set(CMAKE_RUNTIME_OUTPUT_DIRECTORY
-    ${PROJECT_BINARY_DIR}/bin
-    CACHE PATH
-    "Directory where executables will go in the build tree"
-    )
-
-# Set the path were all test executables will go
-set(TEST_OUTPUT_DIRECTORY
-    ${PROJECT_BINARY_DIR}/tests
-    CACHE PATH
-    "Directory where test executables will go in the build tree"
-    )
-
-# Set the path were all example test executables will go
-set(EXAMPLE_OUTPUT_DIRECTORY
-    ${PROJECT_BINARY_DIR}/examples
-    CACHE PATH
-    "Directory where example executables will go in the build tree"
-    )
-
-# Set the Fortran module directory
-set(CMAKE_Fortran_MODULE_DIRECTORY
-    ${PROJECT_BINARY_DIR}/lib/fortran
-    CACHE PATH
-    "Directory where all Fortran modules will go in the build tree"
-    )
-
-# Mark as advanced
-mark_as_advanced(
-     LIBRARY_OUTPUT_PATH
-     CMAKE_RUNTIME_OUTPUT_DIRECTORY
-     CMAKE_Fortran_MODULE_DIRECTORY
-     )
-
-################################
-# Setup compiler options
-# (must be included after HEADER_INCLUDES_DIRECTORY and MPI variables are set)
-################################
-include(${BLT_ROOT_DIR}/cmake/SetupCompilerOptions.cmake)
-
-################################
-# Setup code metrics -
-# profiling, code coverage, etc.
-# (must be included after SetupCompilerOptions)
-################################
-include(${BLT_ROOT_DIR}/cmake/SetupCodeMetrics.cmake)
-
-################################
-# builtin third party libs used by BLT
-################################
-add_subdirectory(${BLT_ROOT_DIR}/thirdparty_builtin)
-
-################################
-# BLT smoke tests
-################################
-if(ENABLE_TESTS)
-    add_subdirectory(${BLT_ROOT_DIR}/tests)
-endif()
+if (NOT BLT_LOADED)
+  set (BLT_LOADED True)
+  mark_as_advanced(BLT_LOADED)
+
+  set( BLT_ROOT_DIR ${CMAKE_CURRENT_LIST_DIR} CACHE PATH "" FORCE )
+
+  ################################
+  # Prevent in-source builds
+  ################################
+  # Fail if someone tries to config an in-source build.
+  if("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
+     message(FATAL_ERROR "In-source builds are not supported. Please remove "
+                         "CMakeCache.txt from the 'src' dir and configure an "
+                         "out-of-source build in another directory.")
+  endif()
+
+  ################################
+  # Setup build options and their default values
+  ################################
+  include(${BLT_ROOT_DIR}/cmake/BLTOptions.cmake)
+
+  ################################
+  # Invoke CMake Fortran setup
+  # if ENABLE_FORTRAN == ON
+  ################################
+  if(ENABLE_FORTRAN)
+      enable_language(Fortran)
+  endif()
+
+  ################################
+  # Enable ctest support 
+  ################################
+  if(ENABLE_TESTS)
+      enable_testing()
+  endif()
+
+  ################################
+  # Macros
+  ################################
+  include(${BLT_ROOT_DIR}/cmake/BLTMacros.cmake)
+
+  ################################
+  # Standard TPL support
+  ################################
+  include(${BLT_ROOT_DIR}/cmake/thirdparty/SetupThirdParty.cmake)
+
+  ################################
+  # Setup docs targets
+  ################################
+  include(${BLT_ROOT_DIR}/cmake/SetupDocs.cmake)
+
+  ################################
+  # Setup source checks
+  ################################
+  include(${BLT_ROOT_DIR}/cmake/SetupCodeChecks.cmake)
+
+  ################################
+  # Standard Build Layout
+  ################################
+
+  # Defines the layout of the build directory. Namely,
+  # it indicates the location where the various header files should go,
+  # where to store libraries (static or shared), the location of the
+  # bin directory for all executables and the location for fortran modules.
+
+  # Set the path where all the headers will be stored
+  if ( ENABLE_COPY_HEADERS )
+      set(HEADER_INCLUDES_DIRECTORY
+          ${PROJECT_BINARY_DIR}/include/
+          CACHE PATH
+          "Directory where all headers will go in the build tree"
+          )
+      include_directories(${HEADER_INCLUDES_DIRECTORY})
+  endif()
+
+  # Set the path where all the libraries will be stored
+  set(LIBRARY_OUTPUT_PATH
+      ${PROJECT_BINARY_DIR}/lib
+      CACHE PATH
+      "Directory where compiled libraries will go in the build tree"
+      )
+
+  # Set the path where all the installed executables will go
+  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY
+      ${PROJECT_BINARY_DIR}/bin
+      CACHE PATH
+      "Directory where executables will go in the build tree"
+      )
+
+  # Set the path were all test executables will go
+  set(TEST_OUTPUT_DIRECTORY
+      ${PROJECT_BINARY_DIR}/tests
+      CACHE PATH
+      "Directory where test executables will go in the build tree"
+      )
+
+  # Set the path were all example test executables will go
+  set(EXAMPLE_OUTPUT_DIRECTORY
+      ${PROJECT_BINARY_DIR}/examples
+      CACHE PATH
+      "Directory where example executables will go in the build tree"
+      )
+
+  # Set the Fortran module directory
+  set(CMAKE_Fortran_MODULE_DIRECTORY
+      ${PROJECT_BINARY_DIR}/lib/fortran
+      CACHE PATH
+      "Directory where all Fortran modules will go in the build tree"
+      )
+
+  # Mark as advanced
+  mark_as_advanced(
+       LIBRARY_OUTPUT_PATH
+       CMAKE_RUNTIME_OUTPUT_DIRECTORY
+       CMAKE_Fortran_MODULE_DIRECTORY
+       )
+
+  ################################
+  # Setup compiler options
+  # (must be included after HEADER_INCLUDES_DIRECTORY and MPI variables are set)
+  ################################
+  include(${BLT_ROOT_DIR}/cmake/SetupCompilerOptions.cmake)
+
+  ################################
+  # Setup code metrics -
+  # profiling, code coverage, etc.
+  # (must be included after SetupCompilerOptions)
+  ################################
+  include(${BLT_ROOT_DIR}/cmake/SetupCodeMetrics.cmake)
+
+  ################################
+  # builtin third party libs used by BLT
+  ################################
+  add_subdirectory(${BLT_ROOT_DIR}/thirdparty_builtin)
+
+  ################################
+  # BLT smoke tests
+  ################################
+  if(ENABLE_TESTS)
+      add_subdirectory(${BLT_ROOT_DIR}/tests)
+  endif()
+
+endif() # only load BLT once!