Remove any variables in the optional build variable list that are marked as mandatory by one or more included build system modules in the CORE build system module. Alter DOXYGEN build system module to by default override the Doxygen configuration file stylesheet and replace it with the LUFA Doxygen stylesheet.

Remove space padding on the current time when automatically generating AVR Studio 4 project creation/modification timestamps.

Ensure build tests use the system provided $(MAKE) variable to determine the command to invoke make, rather than a hard-coded name. Strip off excess whitespace from the list of object files when printing them out to the shell in the build system BUILD module.

Ensure the BULD build system module produces a LSS listing file output when the "all" target is invoked.

Strip trailing slash from the user-supplied LUFA_PATH directory, to prevent double slashes from appearing in the commands/output.

Add EEPROM programming target to the AVRDUDE build system module. Correct message output test for the BUILD build system module. Clean up DOXYGEN build system module logic.

Add C_FLAGS, CPP_FLAGS and ASM_FLAGS variables to the build system BUILD module to allow for language-specific compiler/assembler flags.

Oops - fix accidental negation in the BUILD module architecture detection code. Add error if an unsupported architecture is requested.

Disable linker relaxations for the UC3 architecture, as this does not appear to be supported in the linker.

Replace architecture specific makefiles in the BuildTests with the new common build system makefiles.

Make sure that LUFAConfig.h is included *after* the common submodules, so that the architecture and other defines are available to the configuration header.

Ensure the DFU bootloader disables and clears the activity LED toggle timer when a soft-reset to application space is used.

Merge in AppConfigHeaders branch to trunk, altering all projects and demos to use configuration headers for application and LUFA compile time settings, rather than defines in the project makefiles.

Oops - shell variables can't use the += operator - must reference the existing value in the new value to append.

Remove legacy AS4 project files, now that they can be automatically generated by the new maintenance script.

Add missing documentation to custom BuiltTest hardware mapping files. Fix up old copyright years on some makefiles.

Fixed swapped Little Endian/Big Endian endpoint and pipe write code for the UC3 devices (thanks to Andrew Chu).

Fix incorrect definition for the XMEGA Endpoint_BytesInEndpoint() function when used on OUT endpoints.

Oops - mask out the endpoint address direction when comparing the IN and OUT endpoint indexes in the AVRISP-MKII clone and XPLAINBridge projects.

Fix AVRISP-MKII clone and XPLAINBridge projects not properly configuring the AVRISP IN endpoint when needed if RESET_TOGGLES_LIBUSB_COMPAT compile time option is used.

Turn off watchdog before jumping to the user application in the DFU and CDC based bootloaders, for the specific case of /HWB being low during reset (where the bootloader will re-enter).