使用Kernel的Makefile生成tags和cscope看代码更方便

1. [root@btg ext4]# make help
2. Cleaning targets:
3. clean - Remove most generated files but keep the config and
4. enough build support to build external modules
5. mrproper - Remove all generated files + config + various backup files
6. distclean - mrproper + remove editor backup and patch files
8. Configuration targets:
9. config - Update current config utilising a line-oriented program
10. nconfig - Update current config utilising a ncurses menu based program
11. menuconfig - Update current config utilising a menu based program
12. xconfig - Update current config utilising a QT based front-end
13. gconfig - Update current config utilising a GTK based front-end
14. oldconfig - Update current config utilising a provided .config as base
15. localmodconfig - Update current config disabling modules not loaded
16. localyesconfig - Update current config converting local mods to core
17. silentoldconfig - Same as oldconfig, but quietly, additionally update deps
18. defconfig - New config with default from ARCH supplied defconfig
19. savedefconfig - Save current config as ./defconfig (minimal config)
20. allnoconfig - New config where all options are answered with no
21. allyesconfig - New config where all options are accepted with yes
22. allmodconfig - New config selecting modules when possible
23. alldefconfig - New config with all symbols set to default
24. randconfig - New config with random answer to all options
25. listnewconfig - List new options
26. oldnoconfig - Same as silentoldconfig but set new symbols to n (unset)
28. Other generic targets:
29. all - Build all targets marked with [*]
30. * vmlinux - Build the bare kernel
31. * modules - Build all modules
32. modules_install - Install all modules to INSTALL_MOD_PATH (default: /)
33. firmware_install- Install all firmware to INSTALL_FW_PATH
34. (default: $(INSTALL_MOD_PATH)/lib/firmware)
35. dir/ - Build all files in dir and below
36. dir/file.[oisS] - Build specified target only
37. dir/file.lst - Build specified mixed source/assembly target only
38. (requires a recent binutils and recent build (System.map))
39. dir/file.ko - Build module including final link
40. modules_prepare - Set up for building external modules
41. tags/TAGS - Generate tags file for editors
42. cscope - Generate cscope index
43. gtags - Generate GNU GLOBAL index
44. kernelrelease - Output the release version string
45. kernelversion - Output the version stored in Makefile
46. headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH
47. (default: /opt/ext4/usr)
48. checkstack - Generate a list of stack hogs
49. namespacecheck - Name space analysis on compiled kernel
50. versioncheck - Sanity check on version.h usage
51. includecheck - Check for duplicate included header files
52. export_report - List the usages of all exported symbols
53. headers_check - Sanity check on exported headers
54. headerdep - Detect inclusion cycles in headers
55. coccicheck - Check with Coccinelle.
57. Kernel packaging:
58. rpm-pkg - Build both source and binary RPM kernel packages
59. binrpm-pkg - Build only the binary kernel package
60. deb-pkg - Build the kernel as an deb package
61. tar-pkg - Build the kernel as an uncompressed tarball
62. targz-pkg - Build the kernel as a gzip compressed tarball
63. tarbz2-pkg - Build the kernel as a bzip2 compressed tarball
64. tarxz-pkg - Build the kernel as a xz compressed tarball
65. perf-tar-src-pkg - Build perf-2.6.39-rc3.tar source tarball
66. perf-targz-src-pkg - Build perf-2.6.39-rc3.tar.gz source tarball
67. perf-tarbz2-src-pkg - Build perf-2.6.39-rc3.tar.bz2 source tarball
68. perf-tarxz-src-pkg - Build perf-2.6.39-rc3.tar.xz source tarball
70. Documentation targets:
71. Linux kernel internal documentation in different formats:
72. htmldocs - HTML
73. pdfdocs - PDF
74. psdocs - Postscript
75. xmldocs - XML DocBook
76. mandocs - man pages
77. installmandocs - install man pages generated by mandocs
78. cleandocs - clean all generated DocBook files
80. Architecture specific targets (x86):
81. * bzImage - Compressed kernel image (arch/x86/boot/bzImage)
82. install - Install kernel using
83. (your) ~/bin/installkernel or
84. (distribution) /sbin/installkernel or
85. install to $(INSTALL_PATH) and run lilo
86. fdimage - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)
87. fdimage144 - Create 1.4MB boot floppy image (arch/x86/boot/fdimage)
88. fdimage288 - Create 2.8MB boot floppy image (arch/x86/boot/fdimage)
89. isoimage - Create a boot CD-ROM image (arch/x86/boot/image.iso)
90. bzdisk/fdimage*/isoimage also accept:
91. FDARGS="..." arguments for the booted kernel
92. FDINITRD=file initrd for the booted kernel
94. x86_64_defconfig - Build for x86_64
95. i386_defconfig - Build for i386
97. make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build
98. make V=2 [targets] 2 => give reason for rebuild of target
99. make O=dir [targets] Locate all output files in "dir", including .config
100. make C=1 [targets] Check all c source with $CHECK (sparse by default)
101. make C=2 [targets] Force check of all c source with $CHECK
102. make W=1 [targets] Enable extra gcc checks
104. Execute "make" or "make all" to build all targets marked with [*]
105. For further info see the ./README file
106. [root@btg ext4]#
109. [root@btg ext4]# make tags cscope
110. GEN tags
112. GEN cscope
113. [root@btg ext4]#

我自己生成的cscope和tags打开的内容

1. Cscope tag: start_kernel
2.    # 行 文件名 / 上下文 / 行
3.    1 135 arch/alpha/boot/bootp.c <<start_kernel>>
4.              start_kernel(void )
5.    2 263 arch/alpha/boot/bootpz.c <<start_kernel>>
6.              start_kernel(void )
7.    3 153 arch/alpha/boot/main.c <<start_kernel>>
8.              void start_kernel(void )
9.    4 456 init/main.c <<start_kernel>>
10.              asmlinkage void __init start_kernel(void )
11. Type number and <Enter> (empty cancels):

如果使用kernel的Makefile里的会直接进入到

1.    4 456 init/main.c <<start_kernel>>
2.              asmlinkage void __init start_kernel(void )
3. 里面

非常方便