use the value established by autobuild itself when finding autobuild

indra/cmake/FindAutobuild.cmake

@@ -6,10 +6,14 @@
 #
 #   AUTOBUILD_EXECUTABLE - path to autobuild or pautobuild executable
 
-# *TODO - if cmake was executed by autobuild, autobuild will have set the AUTOBUILD env var
-# update this to check for that case
+
 
 IF (NOT AUTOBUILD_EXECUTABLE)
+
+  # If cmake was executed by autobuild, autobuild will have set the AUTOBUILD env var
+  IF (DEFINED ENV{AUTOBUILD})
+    SET(AUTOBUILD_EXECUTABLE $ENV{AUTOBUILD})
+  ELSE (DEFINED ENV{AUTOBUILD})
     IF(WIN32)
       SET(AUTOBUILD_EXE_NAMES autobuild.cmd autobuild.exe)
     ELSE(WIN32)
@@ -27,15 +31,16 @@ IF (NOT AUTOBUILD_EXECUTABLE)
     ${CMAKE_SOURCE_DIR}/../../..
       PATH_SUFFIXES "/autobuild/bin/"
     )
+  ENDIF (DEFINED ENV{AUTOBUILD})
 
-    IF (AUTOBUILD_EXECUTABLE)
-      GET_FILENAME_COMPONENT(_autobuild_name ${AUTOBUILD_EXECUTABLE} NAME_WE)
-      MESSAGE(STATUS "Using autobuild at: ${AUTOBUILD_EXECUTABLE}")
-    ELSE (AUTOBUILD_EXECUTABLE)
-      IF (AUTOBUILD_FIND_REQUIRED)
-    MESSAGE(FATAL_ERROR "Could not find autobuild executable")
-      ENDIF (AUTOBUILD_FIND_REQUIRED)
-    ENDIF (AUTOBUILD_EXECUTABLE)
+  IF (AUTOBUILD_EXECUTABLE)
+    GET_FILENAME_COMPONENT(_autobuild_name ${AUTOBUILD_EXECUTABLE} NAME_WE)
+    MESSAGE(STATUS "Using autobuild at: ${AUTOBUILD_EXECUTABLE}")
+  ELSE (AUTOBUILD_EXECUTABLE)
+    IF (AUTOBUILD_FIND_REQUIRED)
+      MESSAGE(FATAL_ERROR "Could not find autobuild executable")
+    ENDIF (AUTOBUILD_FIND_REQUIRED)
+  ENDIF (AUTOBUILD_EXECUTABLE)
 
-    MARK_AS_ADVANCED(AUTOBUILD_EXECUTABLE)
+  MARK_AS_ADVANCED(AUTOBUILD_EXECUTABLE)
 ENDIF (NOT AUTOBUILD_EXECUTABLE)