generate COM_OpenCLKernels.cl.h automatically at build time, this allows editing COM_OpenCLKernels.cl and rebuilding and means we dont have to have both files in svn.

updates made to cmake and scons.

build_files/cmake/data_to_c.cmake

@@ -0,0 +1,25 @@
+# cmake script, to be called on its own with 3 defined args
+#
+# - FILE_FROM
+# - FILE_TO
+# - VAR_NAME
+
+# not highly optimal, may replace with generated C program like makesdna
+file(READ ${FILE_FROM} file_from_string HEX)
+string(LENGTH ${file_from_string} _max_index)
+math(EXPR size_on_disk ${_max_index}/2)
+
+file(REMOVE ${FILE_TO})
+
+file(APPEND ${FILE_TO} "int  ${VAR_NAME}_size = ${size_on_disk};\n")
+file(APPEND ${FILE_TO} "char ${VAR_NAME}[] = {")
+
+set(_index 0)
+
+while(NOT _index EQUAL _max_index)
+    string(SUBSTRING "${file_from_string}" ${_index} 2 _pair)
+    file(APPEND ${FILE_TO} "0x${_pair},")
+    math(EXPR _index ${_index}+2)
+endwhile()
+# null terminator not essential but good if we want plane strings encoded
+file(APPEND ${FILE_TO} "0x00};\n")