Add OBJDIR optional build variable to the BULD build system module, to allow...

Add OBJDIR optional build variable to the BULD build system module, to allow the user project to relocate the output object and dependency files to a different directory.

Bootloaders/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)

Demos/Device/ClassDriver/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)

Demos/Device/LowLevel/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)

Demos/DualRole/ClassDriver/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)

Demos/Host/ClassDriver/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)

Demos/Host/LowLevel/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)

LUFA/Build/lufa.build.in

@@ -9,7 +9,7 @@
 LUFA_BUILD_MODULES         += BUILD
 LUFA_BUILD_TARGETS         += size symbol-sizes all elf hex lss clean
 LUFA_BUILD_MANDATORY_VARS  += TARGET ARCH MCU SRC F_USB LUFA_PATH
-LUFA_BUILD_OPTIONAL_VARS   += BOARD OPTIMIZATION C_STANDARD CPP_STANDARD F_CPU C_FLAGS CPP_FLAGS ASM_FLAGS CC_FLAGS LD_FLAGS
+LUFA_BUILD_OPTIONAL_VARS   += BOARD OPTIMIZATION C_STANDARD CPP_STANDARD F_CPU C_FLAGS CPP_FLAGS ASM_FLAGS CC_FLAGS LD_FLAGS OBJDIR
 LUFA_BUILD_PROVIDED_VARS   += 
 LUFA_BUILD_PROVIDED_MACROS += 
 
@@ -54,6 +54,9 @@ LUFA_BUILD_PROVIDED_MACROS +=
 #    CC_FLAGS                  - Common flags to pass to the C/C++ compiler and
 #                                assembler
 #    LD_FLAGS                  - Flags to pass to the linker
+#    OBJDIR                    - Directory for the output object and dependency
+#                                files; if equal to ".", the output files will
+#                                be generated in the same folder as the sources
 #
 # PROVIDED VARIABLES:
 #
@@ -79,6 +82,7 @@ C_FLAGS         ?=
 CPP_FLAGS       ?=
 ASM_FLAGS       ?=
 CC_FLAGS        ?=
+OBJDIR          ?= .
 
 # Sanity check user supplied values
 $(foreach MANDATORY_VAR, $(LUFA_BUILD_MANDATORY_VARS), $(call ERROR_IF_UNSET, $(MANDATORY_VAR)))
@@ -91,6 +95,7 @@ $(call ERROR_IF_EMPTY, BOARD)
 $(call ERROR_IF_EMPTY, OPTIMIZATION)
 $(call ERROR_IF_EMPTY, C_STANDARD)
 $(call ERROR_IF_EMPTY, CPP_STANDARD)
+$(call ERROR_IF_EMPTY, OBJDIR)
 
 # Determine the utility prefix to use for the selected architecture
 ifeq ($(ARCH), AVR8)
@@ -130,6 +135,13 @@ endif
 
 # Convert input source filenames into a list of required output object files
 OBJECT_FILES = $(filter %.o, $(C_SOURCE:%.c=%.o) $(CPP_SOURCE:%.cpp=%.o) $(ASM_SOURCE:%.S=%.o))
+ifneq ($(OBJDIR),.)
+   $(shell mkdir $(OBJDIR) 2>&1 | /dev/null)   
+   VPATH           += $(dir $(SRC))
+   
+   OBJECT_FILES    := $(addprefix $(patsubst %/,%,$(OBJDIR))/, $(notdir $(OBJECT_FILES)))
+endif
+
 DEPENDENCY_FILES = $(OBJECT_FILES:%.o=%.d)
 
 # Create a list of common flags to pass to the compiler/linker/assembler
@@ -211,15 +223,15 @@ elf: $(TARGET).elf
 hex: $(TARGET).hex $(TARGET).eep
 lss: $(TARGET).lss
 
-%.o: %.c $(MAKEFILE_LIST)
+$(OBJDIR)/%.o: %.c $(MAKEFILE_LIST)
 	@echo $(MSG_COMPILE_CMD) Compiling C file \"$<\"
 	$(CROSS)gcc -c $(BASE_CC_FLAGS) $(BASE_C_FLAGS) $(CC_FLAGS) $(C_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
 
-%.o: %.cpp $(MAKEFILE_LIST)
+$(OBJDIR)/%.o: %.cpp $(MAKEFILE_LIST)
 	@echo $(MSG_COMPILE_CMD) Compiling C++ file \"$<\"
 	$(CROSS)gcc -c $(BASE_CC_FLAGS) $(BASE_CPP_FLAGS) $(CC_FLAGS) $(CPP_FLAGS) -MMD -MP -MF $(@:%.o=%.d) $< -o $@
 	
-%.o: %.S $(MAKEFILE_LIST)
+$(OBJDIR)/%.o: %.S $(MAKEFILE_LIST)
 	@echo $(MSG_ASSEMBLE_CMD) Assembling \"$<\"
 	$(CROSS)gcc -c $(BASE_CC_FLAGS) $(BASE_ASM_FLAGS) $(CC_FLAGS) $(ASM_FLAGS) $< -o $@
 

LUFA/DoxygenPages/BuildSystem.txt

@@ -162,6 +162,11 @@
  *    <td><tt>LD_FLAGS</tt></td>
  *    <td>Flags to pass to the linker, after the automatically generated flags.</td>
  *   </tr>
+ *   <tr>
+ *    <td><tt>OBJDIR</tt></td>
+ *    <td>Directory to place the generated object and dependency files. If set to "." the same folder as the source file will be used.
+ *        \note When this option is enabled, all source filenames must be unique.</td>
+ *   </tr>
  *  </table>
  *
  *  \section SSec_BuildModule_BUILD_ProvideVariables Module Provided Variables

Projects/makefile

@@ -23,7 +23,9 @@ ifeq ($(MAKELEVEL), 10)
 endif
 
 all:
+ifeq ($(OBJDIR),)
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) clean all;)
+endif
 
 %:
 	@$(foreach PROJECT, $(PROJECT_DIRECTORIES), $(MAKE) -s -C $(PROJECT) $@;)