VERSION = 1 PATCHLEVEL = 2 SUBLEVEL = 13 ARCH = i386 .EXPORT_ALL_VARIABLES: CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ else if [ -x /bin/bash ]; then echo /bin/bash; \ else echo sh; fi ; fi) TOPDIR := $(shell if [ "$$PWD" != "" ]; then echo $$PWD; else pwd; fi) AS =as LD =ld HOSTCC =gcc -I$(TOPDIR)/include CC =gcc -D__KERNEL__ -I$(TOPDIR)/include MAKE =make CPP =$(CC) -E AR =ar NM =nm STRIP =strip all: do-it-all # # Make "config" the default target if there is no configuration file or # "depend" the target if there is no top-level dependency information. # ifeq (.config,$(wildcard .config)) include .config ifeq (.depend,$(wildcard .depend)) include .depend do-it-all: Version vmlinux else CONFIGURATION = depend do-it-all: depend endif else CONFIGURATION = config do-it-all: config endif # # ROOT_DEV specifies the default root-device when making the image. # This can be either FLOPPY, CURRENT, /dev/xxxx or empty, in which case # the default of FLOPPY is used by 'build'. # ROOT_DEV = CURRENT # # INSTALL_PATH specifies where to place the updated kernel and system map # images. Uncomment if you want to place them anywhere other than root. #INSTALL_PATH=/boot # # If you want to preset the SVGA mode, uncomment the next line and # set SVGA_MODE to whatever number you want. # Set it to -DSVGA_MODE=NORMAL_VGA if you just want the EGA/VGA mode. # The number is the same as you would ordinarily press at bootup. # SVGA_MODE= -DSVGA_MODE=NORMAL_VGA # # standard CFLAGS # CFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer ifdef CONFIG_CPP CFLAGS := $(CFLAGS) -x c++ endif # # if you want the ram-disk device, define this to be the # size in blocks. # #RAMDISK = -DRAMDISK=512 # Include the make variables (CC, etc...) # ARCHIVES =kernel/kernel.o mm/mm.o fs/fs.o net/net.o ipc/ipc.o FILESYSTEMS =fs/filesystems.a DRIVERS =drivers/block/block.a \ drivers/char/char.a \ drivers/net/net.a LIBS =$(TOPDIR)/lib/lib.a SUBDIRS =kernel drivers mm fs net ipc lib ifdef CONFIG_SCSI DRIVERS := $(DRIVERS) drivers/scsi/scsi.a endif ifdef CONFIG_SOUND DRIVERS := $(DRIVERS) drivers/sound/sound.a endif include arch/$(ARCH)/Makefile .c.s: $(CC) $(CFLAGS) -S -o $*.s $< .s.o: $(AS) -o $*.o $< .c.o: $(CC) $(CFLAGS) -c -o $*.o $< .S.s: $(CC) -D__ASSEMBLY__ -traditional -E -o $*.o $< .S.o: $(CC) -D__ASSEMBLY__ -traditional -c -o $*.o $< Version: dummy rm -f include/linux/version.h boot: vmlinux @$(MAKE) -C arch/$(ARCH)/boot vmlinux: $(CONFIGURATION) init/main.o init/version.o linuxsubdirs $(LD) $(LINKFLAGS) $(HEAD) init/main.o init/version.o \ $(ARCHIVES) \ $(FILESYSTEMS) \ $(DRIVERS) \ $(LIBS) -o vmlinux $(NM) vmlinux | grep -v '\(compiled\)\|\(\.o$$\)\|\( a \)' | sort > System.map symlinks: rm -f include/asm ( cd include ; ln -sf asm-$(ARCH) asm) oldconfig: symlinks $(CONFIG_SHELL) Configure -d arch/$(ARCH)/config.in config: symlinks $(CONFIG_SHELL) Configure arch/$(ARCH)/config.in linuxsubdirs: dummy set -e; for i in $(SUBDIRS); do $(MAKE) -C $$i; done $(TOPDIR)/include/linux/version.h: include/linux/version.h newversion: @if [ ! -f .version ]; then \ echo 1 > .version; \ else \ expr `cat .version` + 1 > .version; \ fi include/linux/version.h: $(CONFIGURATION) Makefile newversion @echo \#define UTS_RELEASE \"$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)\" > include/linux/version.h @if [ -f .name ]; then \ echo \#define UTS_VERSION \"\#`cat .version`-`cat .name` `date`\"; \ else \ echo \#define UTS_VERSION \"\#`cat .version` `date`\"; \ fi >> include/linux/version.h @echo \#define LINUX_COMPILE_TIME \"`date +%T`\" >> include/linux/version.h @echo \#define LINUX_COMPILE_BY \"`whoami`\" >> include/linux/version.h @echo \#define LINUX_COMPILE_HOST \"`hostname`\" >> include/linux/version.h @if [ -x /bin/dnsdomainname ]; then \ echo \#define LINUX_COMPILE_DOMAIN \"`dnsdomainname`\"; \ else \ echo \#define LINUX_COMPILE_DOMAIN \"`domainname`\"; \ fi >> include/linux/version.h @echo \#define LINUX_COMPILER \"`$(HOSTCC) -v 2>&1 | tail -1`\" >> include/linux/version.h @echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)` >> include/linux/version.h init/version.o: init/version.c include/linux/version.h $(CC) $(CFLAGS) -DUTS_MACHINE='"$(ARCH)"' -c -o init/version.o init/version.c init/main.o: init/main.c $(CC) $(CFLAGS) $(PROFILING) -c -o $*.o $< fs: dummy $(MAKE) linuxsubdirs SUBDIRS=fs lib: dummy $(MAKE) linuxsubdirs SUBDIRS=lib mm: dummy $(MAKE) linuxsubdirs SUBDIRS=mm ipc: dummy $(MAKE) linuxsubdirs SUBDIRS=ipc kernel: dummy $(MAKE) linuxsubdirs SUBDIRS=kernel drivers: dummy $(MAKE) linuxsubdirs SUBDIRS=drivers net: dummy $(MAKE) linuxsubdirs SUBDIRS=net ifdef CONFIG_MODVERSIONS MODV = -DCONFIG_MODVERSIONS endif modules: include/linux/version.h @set -e; for i in $(SUBDIRS); do $(MAKE) -C $$i CFLAGS="$(CFLAGS) -DMODULE $(MODV)" modules; done modules_install: @( \ MODLIB=/lib/modules/$(VERSION).$(PATCHLEVEL).$(SUBLEVEL); \ cd modules; \ MODULES=""; \ inst_mod() { These="`cat $$1`"; MODULES="$$MODULES $$These"; \ mkdir -p $$MODLIB/$$2; cp -p $$These $$MODLIB/$$2; \ echo Installing modules under $$MODLIB/$$2; \ }; \ \ if [ -f NET_MODULES ]; then inst_mod NET_MODULES net; fi; \ if [ -f SCSI_MODULES ]; then inst_mod SCSI_MODULES scsi; fi; \ if [ -f FS_MODULES ]; then inst_mod FS_MODULES fs; fi; \ \ ls *.o > .allmods; \ echo $$MODULES | tr ' ' '\n' | sort | comm -23 .allmods - > .misc; \ if [ -s .misc ]; then inst_mod .misc misc; fi; \ rm -f .misc .allmods; \ ) clean: archclean rm -f kernel/ksyms.lst rm -f core `find . -name '*.[oas]' -print` rm -f core `find . -name 'core' -print` rm -f vmlinux System.map rm -f .tmp* drivers/sound/configure rm -fr modules/* mrproper: clean rm -f include/linux/autoconf.h include/linux/version.h rm -f drivers/sound/local.h rm -f .version .config* config.in config.old rm -f include/asm rm -f .depend `find . -name .depend -print` ifdef CONFIG_MODVERSIONS rm -f $(TOPDIR)/include/linux/modversions.h rm -f $(TOPDIR)/include/linux/modules/* endif distclean: mrproper backup: mrproper cd .. && tar cf - linux | gzip -9 > backup.gz sync depend dep: archdep touch include/linux/version.h for i in init/*.c;do echo -n "init/";$(CPP) -M $$i;done > .tmpdepend set -e; for i in $(SUBDIRS); do $(MAKE) -C $$i dep; done rm -f include/linux/version.h mv .tmpdepend .depend ifdef CONFIG_MODVERSIONS @echo updating $(TOPDIR)/include/linux/modversions.h @(cd $(TOPDIR)/include/linux/modules; for f in *.ver;\ do echo "#include <linux/modules/$${f}>"; done) \ > $(TOPDIR)/include/linux/modversions.h endif ifdef CONFIGURATION ..$(CONFIGURATION): @echo @echo "You have a bad or nonexistent" .$(CONFIGURATION) ": running 'make" $(CONFIGURATION)"'" @echo $(MAKE) $(CONFIGURATION) @echo @echo "Successful. Try re-making (ignore the error that follows)" @echo exit 1 dummy: ..$(CONFIGURATION) else dummy: endif

unix编程经典书，适合初学者和想深刻理解unix编程精髓的程序员

这是华清远见内部学习资料，对bootloader讲的还算比较清晰，给大家共享一下。