lk/make/build.mk

# use linker garbage collection, if requested
ifeq ($(WITH_LINKER_GC),1)
GLOBAL_COMPILEFLAGS += -ffunction-sections -fdata-sections
GLOBAL_LDFLAGS += --gc-sections
endif

ifneq (,$(EXTRA_BUILDRULES))
-include $(EXTRA_BUILDRULES)
endif

$(EXTRA_LINKER_SCRIPTS):

$(OUTBIN): $(OUTELF)
	@echo generating image: $@
	$(NOECHO)$(SIZE) $<
	$(NOECHO)$(OBJCOPY) -O binary $< $@

$(OUTELF).hex: $(OUTELF)
	@echo generating hex file: $@
	$(NOECHO)$(OBJCOPY) -O ihex $< $@

$(OUTELF): $(ALLMODULE_OBJS) $(EXTRA_OBJS) $(LINKER_SCRIPT) $(EXTRA_LINKER_SCRIPTS)
	@echo linking $@
	$(NOECHO)$(SIZE) -t --common $(sort $(ALLMODULE_OBJS)) $(EXTRA_OBJS)
	$(NOECHO)$(LD) $(GLOBAL_LDFLAGS) -dT $(LINKER_SCRIPT) $(addprefix -T,$(EXTRA_LINKER_SCRIPTS)) \
		$(ALLMODULE_OBJS) $(EXTRA_OBJS) $(LIBGCC) -Map=$(OUTELF).map -o $@

$(OUTELF).sym: $(OUTELF)
	@echo generating symbols: $@
	$(NOECHO)$(OBJDUMP) -t $< | $(CPPFILT) > $@

$(OUTELF).sym.sorted: $(OUTELF)
	@echo generating sorted symbols: $@
	$(NOECHO)$(OBJDUMP) -t $< | $(CPPFILT) | sort > $@

$(OUTELF).lst: $(OUTELF)
	@echo generating listing: $@
	$(NOECHO)$(OBJDUMP) -Mreg-names-raw -d $< | $(CPPFILT) > $@

$(OUTELF).debug.lst: $(OUTELF)
	@echo generating listing: $@
	$(NOECHO)$(OBJDUMP) -Mreg-names-raw -S $< | $(CPPFILT) > $@

$(OUTELF).dump: $(OUTELF)
	@echo generating objdump: $@
	$(NOECHO)$(OBJDUMP) -x $< > $@

$(OUTELF).size: $(OUTELF)
	@echo generating size map: $@
	$(NOECHO)$(NM) -S --size-sort $< > $@

# print some information about the build
$(BUILDDIR)/srcfiles.txt: $(OUTELF)
	@echo generating $@
	$(NOECHO)echo $(sort $(ALLSRCS)) | tr ' ' '\n' > $@

$(BUILDDIR)/include_paths.txt: $(OUTELF)
	@echo generating $@
	$(NOECHO)echo $(subst -I,,$(sort $(GLOBAL_INCLUDES))) | tr ' ' '\n' > $@

#include arch/$(ARCH)/compile.mk
[make] miscellaneous make system tweaks -Have arch set the default optimization level. Most will use O2, but arm-m sets to Os. -Make the link time garbage collection be optional. Only set for arm-m. 2014-03-22 21:03:03 -07:00			`# use linker garbage collection, if requested`
			`ifeq ($(WITH_LINKER_GC),1)`
			`GLOBAL_COMPILEFLAGS += -ffunction-sections -fdata-sections`
			`GLOBAL_LDFLAGS += --gc-sections`
			`endif`

[make] Add support for EXTRA_BUILDRULES All makefiles added to EXTRA_BUILDRULES variable will be included right before processing bulk of build.mk Change-Id: Ic37e37ea7469ee57e6f6543f378c5d0c1510824b 2014-04-11 19:19:18 -07:00			`ifneq (,$(EXTRA_BUILDRULES))`
			`-include $(EXTRA_BUILDRULES)`
			`endif`

[make] add ability to set EXTRA_LINKER_SCRIPTS in modules This allows for individual modules to extend the main linker script, primarily to add their own sections to interate over. Remove the main shared_* linker scripts. 2015-10-26 16:33:39 -07:00			`$(EXTRA_LINKER_SCRIPTS):`

initial commit of lk (little kernel) project 2008-09-01 02:26:09 -07:00			`$(OUTBIN): $(OUTELF)`
			`@echo generating image: $@`
			`$(NOECHO)$(SIZE) $<`
[make] fix a typo that was causing some build lines to echo 2012-11-11 14:00:34 -08:00			`$(NOECHO)$(OBJCOPY) -O binary $< $@`
initial commit of lk (little kernel) project 2008-09-01 02:26:09 -07:00
[make] also output .hex files in intel hex format 2012-11-02 11:48:17 -07:00			`$(OUTELF).hex: $(OUTELF)`
			`@echo generating hex file: $@`
[make] fix a typo that was causing some build lines to echo 2012-11-11 14:00:34 -08:00			`$(NOECHO)$(OBJCOPY) -O ihex $< $@`
[make] also output .hex files in intel hex format 2012-11-02 11:48:17 -07:00
[make] add ability to set EXTRA_LINKER_SCRIPTS in modules This allows for individual modules to extend the main linker script, primarily to add their own sections to interate over. Remove the main shared_* linker scripts. 2015-10-26 16:33:39 -07:00			`$(OUTELF): $(ALLMODULE_OBJS) $(EXTRA_OBJS) $(LINKER_SCRIPT) $(EXTRA_LINKER_SCRIPTS)`
initial commit of lk (little kernel) project 2008-09-01 02:26:09 -07:00			`@echo linking $@`
[make] also output the size of any extra objects included in the final link 2015-10-14 13:05:37 -07:00			`$(NOECHO)$(SIZE) -t --common $(sort $(ALLMODULE_OBJS)) $(EXTRA_OBJS)`
[make] add ability to set EXTRA_LINKER_SCRIPTS in modules This allows for individual modules to extend the main linker script, primarily to add their own sections to interate over. Remove the main shared_* linker scripts. 2015-10-26 16:33:39 -07:00			`$(NOECHO)$(LD) $(GLOBAL_LDFLAGS) -dT $(LINKER_SCRIPT) $(addprefix -T,$(EXTRA_LINKER_SCRIPTS)) \`
[make] output .map file 2016-10-31 10:38:42 +01:00			`$(ALLMODULE_OBJS) $(EXTRA_OBJS) $(LIBGCC) -Map=$(OUTELF).map -o $@`
initial commit of lk (little kernel) project 2008-09-01 02:26:09 -07:00
			`$(OUTELF).sym: $(OUTELF)`
			`@echo generating symbols: $@`
			`$(NOECHO)$(OBJDUMP) -t $< \| $(CPPFILT) > $@`

[make] also generate lk.elf.sym.sorted 2014-01-26 22:51:51 -08:00			`$(OUTELF).sym.sorted: $(OUTELF)`
[make] add ability to set EXTRA_LINKER_SCRIPTS in modules This allows for individual modules to extend the main linker script, primarily to add their own sections to interate over. Remove the main shared_* linker scripts. 2015-10-26 16:33:39 -07:00			`@echo generating sorted symbols: $@`
[make] also generate lk.elf.sym.sorted 2014-01-26 22:51:51 -08:00			`$(NOECHO)$(OBJDUMP) -t $< \| $(CPPFILT) \| sort > $@`

initial commit of lk (little kernel) project 2008-09-01 02:26:09 -07:00			`$(OUTELF).lst: $(OUTELF)`
			`@echo generating listing: $@`
			`$(NOECHO)$(OBJDUMP) -Mreg-names-raw -d $< \| $(CPPFILT) > $@`

			`$(OUTELF).debug.lst: $(OUTELF)`
			`@echo generating listing: $@`
			`$(NOECHO)$(OBJDUMP) -Mreg-names-raw -S $< \| $(CPPFILT) > $@`

[make] add ability to set EXTRA_LINKER_SCRIPTS in modules This allows for individual modules to extend the main linker script, primarily to add their own sections to interate over. Remove the main shared_* linker scripts. 2015-10-26 16:33:39 -07:00			`$(OUTELF).dump: $(OUTELF)`
			`@echo generating objdump: $@`
			`$(NOECHO)$(OBJDUMP) -x $< > $@`

initial commit of lk (little kernel) project 2008-09-01 02:26:09 -07:00			`$(OUTELF).size: $(OUTELF)`
			`@echo generating size map: $@`
			`$(NOECHO)$(NM) -S --size-sort $< > $@`

[make] output a text file with all the source files and include paths used in the build 2015-11-20 20:51:52 -08:00			`# print some information about the build`
[build] add deps for srcfiles.txt and include_paths.txt Without the dependencies, the files get written once and don't get updated when include paths or source files change. 2016-11-21 19:39:31 -08:00			`$(BUILDDIR)/srcfiles.txt: $(OUTELF)`
[make] output a text file with all the source files and include paths used in the build 2015-11-20 20:51:52 -08:00			`@echo generating $@`
			`$(NOECHO)echo $(sort $(ALLSRCS)) \| tr ' ' '\n' > $@`

[build] add deps for srcfiles.txt and include_paths.txt Without the dependencies, the files get written once and don't get updated when include paths or source files change. 2016-11-21 19:39:31 -08:00			`$(BUILDDIR)/include_paths.txt: $(OUTELF)`
[make] output a text file with all the source files and include paths used in the build 2015-11-20 20:51:52 -08:00			`@echo generating $@`
			`$(NOECHO)echo $(subst -I,,$(sort $(GLOBAL_INCLUDES))) \| tr ' ' '\n' > $@`

[make] better modularize the build system -Each module's rules.mk defines a seperate linkage unit. Each module can have a private set of CFLAGS, DEFINES, INCLUDES, and so forth. -Files to be compiled are now added by source, not object. Most rules.mk files can be converted easily by following these steps: 1) add 'MODULE := $(LOCAL_DIR)' near the top of the file 2) change OBJS += to MODULE_SRCS += and list source files instead of .os 3) add 'include make/module.mk' at the bottom of the file See make/module.mk for directions. 2012-08-29 14:51:23 -07:00			`#include arch/$(ARCH)/compile.mk`
initial commit of lk (little kernel) project 2008-09-01 02:26:09 -07:00