source: README@ 3d24e5b

2.4 ablfs-more legacy trunk
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31. INTRODUCTION::
4
5 This collection of scripts, known as jhalfs, strives to create
6 accurate makefiles from the Linux From Scratch book series XML files.
7 This software is an evolution of the original "jhalfs-0.2" code developed
8 by Jeremy Huntwork.
9
10 The usage of this script assumes you have read and are familiar with
11 the book(s) and, therefore, the configuration variables found in menuconfig
12 interface will have meaning to you.
13
14 The list of supported books can be found at
15 http://wiki.linuxfromscratch.org/alfs/wiki/SupportedBooks
16
17 NOTES::
18 *. The resulting Makefile takes considerable time to run to completion.
19 Lay in a supply of caffeine beverages.
20
21 *. It is recommended that you temporarily unpack your linux kernel,
22 run <make menuconfig>, configure the kernel as per the book and save
23 the resulting .config file. This suggestion also applies to the
24 configuration of the uClibc package when building a HLFS system using
25 uClibc rather than glibc.
26
27 *. Read carefully this file and the other README.* files before start
28 using the tool.
29
302. PREREQUISITES::
31
32 To use this tool you MUST:
33
34 - have experience building {c,h,b}LFS packages
35 - know how to edit and write shell scripts
36 - know how a Makefile works
37 - be able to trace build failures and to find what is causing it
38 (user error, package bug, {c,h,b}LFS command bug, or jhalfs code bug)
39
40 If you do not have the above skills, please don't use this tool.
41
42
433. INSTALLATION::
44
45 No installation is required. System-wide installation is not allowed.
46
474. CONFIGURATION::
48
49 We have installed the familiar menu based configuration tool driven by
50 GNU make. see the section RUNNING, for details
51
525. RUNNING::
53
54 The command <make> will launch a menu based configuration program. You will
55 recognize the layout from building the kernel or uClibc/BusyBox. The
56 underlying menu code was borrowed from BusyBox and slightly modified for
57 our use.
58
59 Help on parameter function is available from the on-line help. Please
60 make use of that feature for additional information not in this file.
61
62 Once you have set the parameters you wish and have saved your work the
63 jhalfs script is launch. The script verify first that the host can run
64 it and build the xLFS system, then validate the configuration and present
65 you with your selections which you may accept or reject.
66
67 If you accepted the displayed settings jhalfs will proceed to create the
68 Makefile, optionally download packages.
69
70 IMPORTANT::
71 You must be logged as a normal user with sudo privileges to run
72 the Makefile. Furthermore, you are supposed to have enough privilege
73 to become any user. If you are not bothered about security issues,
74 the entry for the user "jhalfs_user" in /etc/sudoers could be
75 jhalfs_user ALL=(ALL) NOPASSWD:ALL
76
77 NOTE::
78 If you run the jhalfs script directly the only function you can select
79 is to display the version number running <./jhalfs -v>
80
816. BLFS_TOOL SUPPORT::
82
83 For books that support it (As of March 8, 2012, works only with LFS),
84 there is an option to install an automated framework for building BLFS
85 packages. it is called blfs-tool. When you tick `BOOK Settings/Add
86 blfs-tool support' in jhalfs configuration menu, the tools are
87 installed in $BLFS_ROOT (default /blfs_root) on the xLFS system,
88 and a few dependencies (which you may select) are built at the
89 end of the jhalfs run, before the custom tools. The instructions for
90 building the dependencies are taken from the BLFS book.
91
92 (TODO: blfs-tools have not been tested with current (version 3.0) CLFS,
93 and certianly need some adaptation to run)
94 WARNING:: If you add blfs-tool support on a CLFS Sysroot build
95 you MUST edit the scripts to fix the installation paths.
96
97 After booting the new xLFS system some steps are needed to finish
98 the installation of the automated tools:
99
100 - A user account must be created. You must be logged on that user
101 account to use blfs-tool. This is not strictly necessary,
102 since the packages can be built as root, too, but it is
103 never a good idea to build packages as root.
104
105 - Move /blfs-root to that user's home and change ownership of the
106 directory and files to the user.
107
108 - Give the user read and write privileges over the $TRACKING_DIR
109 directory and the files that it contains.
110
111 - Configure sudo, adding the needed privileges for the user. For
112 newer sudo version, do not forget to add a line Defaults secure_path=
113 containing /sbin and /usr/sbin (in /etc/sudoers), otherwise some
114 executables are not found.
115
116 - Although it is not strictly necessary, it is recommended to install
117 the bash shell startup files (as per `3.After LFS Configuration
118 Issues' of the BLFS book), as some instructions in BLFS rely on
119 their being present.
120
121 We assume that blfs-tool will be used on a running fresh xLFS system.
122 To use it to build BLFS packages from the chroot jail is also possible,
123 but not supported.
124
125 To know how to use blfs-tool, see README.BLFS.
126
1277. LAYOUT::
128
129 /BLFS (see README.BLFS)
130
131 /CLFS/master.sh
132 /clfs.xsl
133
134 /CLFS2/master.sh
135 /clfs2.xsl
136
137 /CLFS3/master.sh
138 /clfs3.xsl
139
140 /HLFS/master.sh
141 /hlfs.xsl
142
143 /LFS/master.sh
144 /lfs.xsl
145
146 /common/common_functions
147 /makefile_functions
148 /packages.xsl
149 /urls.xsl
150 /create-sbu_du-report.sh
151 /progress_bar.sh
152 /blfs-tool-deps/9xx-*
153 /libs/func_*
154
155 /custom/template
156 /config/
157 /examples/*
158 /examples_CLFS-E/*
159
160 /extras/do_copy_files
161 /do_ica_prep
162 /do_ica_work
163 /farce
164 /filelist
165
166 /optimize/opt_config
167 /opt_override
168 /optimize_functions
169 /opt_config.d/noOpt
170 /noSymbols
171 /O3pipe
172 /O3pipe_march
173 /defOpt_fPIC
174
175 /menu/*
176
177 README
178 README.BLFS
179 README.CLFS
180 README.HLFS
181 README.CUSTOM
182 TODO
183 LICENSE
184
185 Config.in
186 Makefile
187 jhalfs
188 blfs-tool
189
1908. FAQ::
191 Q. "This 'help' file is very sparse"
192 A. Yes, it is. This tool, jhalfs, is for those who understand the LFS books
193 and wish to automate the build. 99% of any problems that arise can be
194 solved by reading the book(s).
195
196 Q. "It doesn't work!"
197 A. Yes it does, try >> make
198 Remember you must have 'sudo' privileges.
199
200 Q. "It still doesn't work"
201 A. jhalfs was designed to work against the development versions of the LFS
202 series of books. Consequently changes in a book(s) sometimes breaks older
203 versions of jhalfs. Before you start pulling out your hair download the
204 latest version of jhalfs to see if that solves your problem.
205
206 Q. "How do I specify the build location?"
207 A. The original LFS document worked against the well known location
208 /mnt/lfs. This script automates the build of all of the LFS series of
209 books and uses a generic location $BUILDDIR with a default value of
210 /mnt/build_dir. You may change this value to suit your needs.
211
212 The layout below $BUILDDIR is as follows.
213 $BUILDDIR/
214 jhalfs (Makefile, cmd scripts, logs, etc..)
215 sources (where packages reside)
216 tools (temporary bootstrap system)
217 cross-tools (temporary CLFS only)
218 ...
219 FHS dir structure
220 ...
221 blfs_root (files to use blfs-tool if selected to install it)
222
223 Q. "What is the function of the SRC_ARCHIVE variable?"
224 A. When jhalfs runs and packages download was selected, it creates a local
225 copy of the necessary packages in BUILDDIR/sources by downloading the
226 files. If the variable SRC_ARCHIVE is defined the software will first
227 look in this location for the file and, if found, will copy it to
228 BUILDDIR/sources.
229 If the files are not found in SRC_ARCHIVE _and_ you have write priv to
230 the directory any downloaded files will be mirrored there.
231
232 Q. "How do I set the SRC_ARCHIVE location?"
233 A. The best way to set the value of SRC_ARCHIVE is
234
235 export SRC_ARCHIVE=/wherever/you/store/downloaded/packages
236
237 or you can set the full path in the proper menu entry.
238
239 Q. "Why have 2 copies of the files?"
240 A. The package files must be visible during the chroot phase and this is a
241 simple and reliable method of doing so. This method also handles the
242 CLFS boot build method where the final build may be done on a separate
243 machine.
244
245 Q. "What is the function of "User account" and "Group account" menu
246 settings?"
247 A. If you are running jhalfs from a low or non-privileged account you may
248 not have the priv to create/delete the user needed to build temporary
249 tools.
250 These settings allow you to use your own user and group name to do those
251 build steps.
252
253 These variables are adjustable also when invoking make:
254
255 $BUILDDIR make LUSER=myaccount LGROUP=mygroup
256
257 The only changes to your account will be the creation of a NEW .bashrc
258 after saving your original to .bashrc.XXX
259
260 Q. "When I try to build CLFS the Makefile fails at the mid-point"
261 A. There could be numerous reasons for the failure but the most likely
262 reason is you are doing a cross-build using the 'chroot' method and the
263 target is not compatible with the host. If you choose to build using
264 the chroot method a test is performed at the end of the temptools
265 phase. If the test succeeds the build continues inside a chroot jail.
266 However if the test fails, it means the host and target are not
267 compatible an you should use the 'boot' method to create your target
268 code.
269 As an extreme example: You can build a sparc target on a x86 platform but
270 only the temptools phase. You must select the 'boot' method and not the
271 'chroot.' You must transfer the toolchain to a sparc platform, reboot the
272 sparc box and continue the build.
273 Of all the LFS series of books Cross-LFS requires the greatest
274 understanding of host/target hardware combination. Please read the book
275 carefully and don't skip the easy parts (there are none...)
276
277 Q. "How could I stop the build at a predefined chosen point?"
278 A. Launch the Makefile manually passing the last numbered target to be build
279 as the break point. For example:
280
281 make BREAKPOINT=84-bash
282
283 The build can be stopped also at the end of a top-level build phase by
284 calling directly the appropriate mk_* target. For example:
285
286 make mk_LUSER
287
288 See the Makefile to know the proper target names for that book build.
289
290Authors:
291 George Boudreau
292 Manuel Canales Esparcia
293 Pierre Labastie
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