Update build tree. Dramatically improved build time. It actually now behaves as expected.

src/dtkComposer/CMakeLists.txt

@@ -321,8 +321,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkCore/CMakeLists.txt

@@ -205,8 +205,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}
@@ -223,7 +223,7 @@ if(DTK_BUILD_WRAPPERS AND SWIG_FOUND AND PYTHONLIBS_FOUND)
 add_custom_command(TARGET ${PROJECT_NAME} POST_BUILD
   DEPENDS ${PROJECT_SOURCE_DIR}/dtkCore.i
   COMMAND ${CMAKE_COMMAND} ARGS -E make_directory ${CMAKE_BINARY_DIR}/modules
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy ${${PROJECT_NAME}_BINARY_DIR}/core.py ${CMAKE_BINARY_DIR}/modules
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different ${${PROJECT_NAME}_BINARY_DIR}/core.py ${CMAKE_BINARY_DIR}/modules
   COMMENT "-- Moving python modules to ${CMAKE_BINARY_DIR}/modules")
 
 set(${PROJECT_NAME}_MODULES ${CMAKE_BINARY_DIR}/modules/core.py)

src/dtkCrypto/CMakeLists.txt

@@ -83,8 +83,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkDistributed/CMakeLists.txt

@@ -217,8 +217,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkGui/CMakeLists.txt

@@ -4,9 +4,9 @@
 ## Copyright (C) 2008 - Julien Wintz, Inria.
 ## Created: Mon Jul 20 22:21:50 2009 (+0200)
 ## Version: $Id$
-## Last-Updated: Wed May 16 09:36:54 2012 (+0200)
+## Last-Updated: Tue May 22 01:13:05 2012 (+0200)
 ##           By: Julien Wintz
-##     Update #: 251
+##     Update #: 259
 ######################################################################
 ## 
 ### Commentary: 
@@ -175,8 +175,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkJson/CMakeLists.txt

@@ -77,8 +77,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkLog/CMakeLists.txt

@@ -90,8 +90,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkMath/CMakeLists.txt

@@ -86,8 +86,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkNotification/CMakeLists.txt

@@ -94,8 +94,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkPlot/CMakeLists.txt

@@ -91,8 +91,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkScript/CMakeLists.txt

@@ -104,8 +104,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkVr/CMakeLists.txt

@@ -163,8 +163,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}

src/dtkZip/CMakeLists.txt

@@ -83,8 +83,8 @@ generate_export_header(${PROJECT_NAME}
   EXPORT_FILE_NAME "${PROJECT_NAME}Export.h")
 
 add_custom_command(TARGET ${PROJECT_NAME} PRE_BUILD
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
-  COMMAND ${CMAKE_COMMAND} ARGS -E copy "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}"
+  COMMAND ${CMAKE_COMMAND} ARGS -E copy_if_different "${${PROJECT_NAME}_BINARY_DIR}/${PROJECT_NAME}Export.h" "${CMAKE_BINARY_DIR}/${PROJECT_NAME}Export")
 
 set(${PROJECT_NAME}_HEADERS
   ${${PROJECT_NAME}_HEADERS}