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Update README.BLFS for envars.conf removal

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And try to clarify... Also remove references to books other than
LFS.
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Pierre Labastie 2021-11-09 19:31:57 +01:00
parent 267b19da59
commit 0495e57e0a
1 changed files with 114 additions and 101 deletions
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171
README.BLFS
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@ -11,10 +11,11 @@
build scripts and Makefile will work "as is", thus, as a general rule,
you will need to review and edit the scripts while reading the book.
Since version 3.0 of jhalfs, the blfs tools allow also to update packages
from the LFS book. LFS packages which may be updated appear in the menu
interface. When selected, their scriptlet is generated in the same manner
as for BLFS packages.
The blfs tools allow also to update packages from the LFS book. LFS
packages which may be updated appear in the menu interface. When selected,
their scriptlet is generated in the same manner as for BLFS packages.
(TODO: presently, when an LFS package needs a patch, you'll have to
donwload it manually to your $SRC_ARCHIVE directory (usually /sources)).
2. PREREQUISITES::
@ -24,8 +25,8 @@
- recommended: wget (to download the package tarballs) and sudo (to build
as a user)
- optional: lynx (allows to read the generated linearized book), GPM (to
cut and paste commands from the book), subversion (to update the book
sources), openssl (used by wget for all https:// sites)
cut and paste commands from the book), git (to update the book
sources)
Note that the optional dependencies are recommended for ease of use of the
tool.
@ -51,23 +52,20 @@
Select "Use Book --> Beyond Linux From Scratch" in the jhalfs menu:
The tools are installed in $HOME$BLFS_ROOT (the default for $BLFS_ROOT
is /blfs_root). The BLFS book is downloaded or copied to its directory.
The tracking directory (see below) is initialized but not created: before
the installation, you should ensure the tracking directory (default location
/var/lib/jhalfs/BLFS) exists and is writable by the user. After the
intallation, you should perform the following additional steps:
- Configure sudo, adding the needed privileges for the user. For
newer sudo version, do not forget to add a line `Defaults secure_path='
containing /sbin and /usr/sbin (in /etc/sudoers), otherwise some
executables are not found.
The tracking directory (see below) is created (if it does not already
exist) and initialized. Before running "make", you should ensure the
tracking directory (default location /var/lib/jhalfs/BLFS) can be:
- either created by the user running "make", if it does not exist
- or that it is writable by the user running "make", if it exists.
After the intallation, you should perform the following additional steps:
- Configure sudo, adding the needed privileges for the user.
- Although it is not strictly necessary, it is recommended to install
the bash shell startup files (as per `3. After LFS Configuration
Issues' of the BLFS book), as some instructions in BLFS rely on
their being present.
- In this case, the tool has no way to know which version of LFS packages
is installed, so that the menu interface will show all the LFS packages,
- At this point, the tool has no way to know which versions of LFS packages
are installed, so that the menu interface will show all the LFS packages,
as if they were not installed. If you have a released version of LFS, or
the date of your GIT version of LFS is known, you should run the
update-lfs.sh script. If you have updated some
@ -80,19 +78,16 @@
tracking file. The only way is to create empty files with names
<package>-<installed-version> in the tracking directory, and run the tool.
3.2 INSTALLATION ON A JUST BUILT xLFS SYSTEM
3.2 INSTALLATION ON A JUST BUILT LFS SYSTEM
For books that support it (only LFS for jhalfs version 2.4),
For books that support it (only LFS),
there is an option to install the BLFS tools right after building
the xLFS system: just tick `BOOK Settings/Add blfs-tool support' in
the LFS system: just tick `BOOK Settings/Add blfs-tool support' in
jhalfs configuration menu. The tools are installed in $BLFS_ROOT
(default /blfs_root) on the xLFS system, and the dependencies are built
(default /blfs_root) on the LFS system, and the dependencies are built
at the end of the jhalfs run, before the custom tools.
(TODO: blfs-tools have not been tested with current (version 3.0) of CLFS,
and certainly need some adaptation to run)
After booting the new xLFS system some steps are needed to finish
After booting the new LFS system some steps are needed to finish
the installation of the automated tools:
- A user account must be created. You must be logged on that user
@ -113,7 +108,7 @@
the tool in this case, and there is no need to run the update-lfs.sh
script.
We assume that the BLFS tools will be used on a booted xLFS system.
We assume that the BLFS tools will be used on a booted LFS system.
Using them to build BLFS packages in a chroot jail is also possible,
but not supported.
@ -123,7 +118,7 @@
lfs-xml/* GIT tree of the selected LFS book version
lib/constants.inc functions libraries
/func_dependencies for building the dependency tree
menu/* lxdialog and menuconfig source code
menu/* menuconfig source code
xsl/gen_pkg_list.xsl XSL stylesheet to generate the package database
/gen_config.xsl XSL stylesheet to generate the Config.in file
for use in the menuconfig system
@ -135,24 +130,29 @@
/scripts.xsl XSL stylesheet to generate the scriptlets from
book.xml
/bump.xsl XSL stylesheet to update the tracking file
/process-install.xsl XSL stylesheet included by scripts.xsl, for
outputting cleanly install instructions
/process-replaceable.xsl XSL stylesheet included by scripts.xsl, for
generating correct instructions when a
<replaceable> tag is encountered.
README.BLFS this file
TODO developers notes (well, not updated often)
gen_pkg_book.sh resolves dependencies and generates linear BLFS
books and build scripts
gen_pkg_book.sh resolves dependencies, generates a linear BLFS
book, and finally generates build scripts
gen-makefile.sh generates the target Makefile
progress_bar.sh the target Makefile progress bar
gen-special.sh Helper script for generating the package database
Makefile Used by make to update the package database from
the GIT tree, then launch the menuconfig interface,
and run gen_pkg_book.sh based on configuration
settings
packdesc.dtd a simple DTD describing the format of the package
database and the tracking file.
envars.conf envars needed when running the target build scripts
gen-special.sh Helper script for generating the package
database
Makefile Used by make to update the package database
from the GIT tree, then launch the menuconfig
interface, and run gen_pkg_book.sh based on
configuration settings
packdesc.dtd a simple DTD describing the format of the
package database and the tracking file.
Working files: several files are generated when first running the tool
Working files: several files are generated when first running the tool:
packages.xml auto-generated packages database
packages.xml auto-generated package database
Config.in input file for the menu driven choices
configuration file generated by the menuconfig process
dependencies/* files recording the dependency tree
@ -171,7 +171,7 @@ Working files: several files are generated when first running the tool
The tracking system itself is an XML file: instpkg.xml. It is
initialized when <make> is first run in blfs_root. It resides in a
directory, which is created when needed during the process of building
custom tools or blfs dependencies, right after xLFS. You can specify
custom tools or blfs dependencies, right after LFS. You can specify
that directory location in the blfs-tools sub-menu of jhalfs. You may
need to update permissions and/or ownership of this directory before
using the blfs tool (see README in jhalfs).
@ -195,9 +195,9 @@ Working files: several files are generated when first running the tool
If you are using the development book version and you want to update
installed packages to the latest version found in that book, you need to
update the XML sources and packages database. This is not necessary if
you just built xLFS, and you can skip to step 3.4. To do that, run
"make update".
update the XML sources and packages database. To do that, run
"make update". This is not necessary if you just built LFS, and you
can skip to step 4.2.
On the next configuration run, packages already installed but listed
with a new version in the book will be available for target selection
@ -209,17 +209,35 @@ Working files: several files are generated when first running the tool
build order for one or several packages.
Run <make> to launch the configuration interface. The main menu contains
two blocks: individual package selection, and build options.
four blocks: individual package selection, Build settings, Build layout,
and Optimization.
In the build options section, the dependencies level and default packages
used to solve alternatives are set (currently, only for the MTA). You can
also select whether the build will be made as a normal user or as root.
Those settings are saved to be reused in future configuration runs.
Note that you may select as many targets as you want, not just one
as in the previous version of this tool. But we suggest to not select
In the package selection block, menus and submenus are organized
as the book's parts, chapters and sections. You can navigate those menus
and select as many targets as you want. But we suggest to not select
too many at a time to be able to sort issues!
In the "Build settings" submenu, the dependency level and default
packages used to solve alternatives are set (currently, only for the MTA).
You can also select whether the build will be made as a normal user or as
root, whether to use "porg style" package management, whether to remove
".la" files, and wheter statistics for the package are generated (build
time, memory footprint and "DESTDIR" install). If you use package
management, you have to enter the path to the packInstall.sh script too.
In the "Build layout" submenu, you can select where the source tarballs
reside and are downloaded, where the packages are built, and whether to
keep the build tree after installation.
In the "Optimization" submenu, you can select the number of parallel
jobs, and set the usual CFLAGS, CXXFLAGS, and LDFLAGS. the special
keyword "EMPTY" can be used for those flags to ensure they are unset.
Note that there are help strings associated to those menus. Please
read them for details!
Those settings are saved to be reused in future configuration runs.
When you are done with the menu, a few checks occur, and the dependency
chain is generated. Each dependency appears with its priority (required,
recommended, optional, or external), and it's level. There is a root level
@ -238,7 +256,7 @@ Working files: several files are generated when first running the tool
Furthermore, there is a directory "scripts", which contains the generated
scriptlets.
There is also another directory, "dependencies" that contains files
There is yet another directory, "dependencies" that contains files
generated while resolving dependencies.
4.3 EDITING BUILD SCRIPTS::
@ -255,16 +273,14 @@ Working files: several files are generated when first running the tool
Remember, the package tracking system isn't a package management tool
and knows nothing about packages not in the BLFS book.
IMPORTANT: Review and edit envars.conf, at least after installing the
tool. This file is used to set global envars needed by the build scripts.
If you use package management, the variable JH_PACK_INSTALL should point to
the directory where the packInstall.sh script resides.
4.4 CREATING THE MAKEFILE::
When the build scripts are ready to be run, the Makefile can be
created. Create an empty directory (for example "mkdir work") and cd
to that directory. Then run ../gen-makefile.sh
created. Create an empty subdirectory (for example "mkdir work") and cd
to that directory. Then run ../gen-makefile.sh. Note that the directory
is completely emptied before generating the Makefile, so to prevent
erasing useful data, the script ensures that the name of the current
working directory starts with "work".
Review the Makefile, and, if all looks sane, start the build by running
"make".
@ -296,7 +312,7 @@ Working files: several files are generated when first running the tool
For those packages that have a "Configuration" section, you should
edit the build script to fit the needs of your system. Sometimes, the
bash startup files are modified. The shipped 'envars.conf' contains a
bash startup files are modified. The generated scripts contain a
line 'source /etc/profile', which ensures that the proper environment
variables are used.
@ -317,7 +333,7 @@ Working files: several files are generated when first running the tool
breaks those pages into individual pages for each packages in the linear
book. Also, the menu gives the choice to select each package individually.
To build the whole Xorg7 chapter, select twm. The (recommended)
To build the whole Xorg7 chapter, select xinit. The (recommended)
dependency chain brings in the whole set of Xorg packages.
5.5 PATCHES
@ -330,28 +346,25 @@ Working files: several files are generated when first running the tool
If building as a normal user (the default setting), be sure that all
commands that require root privileges are run using sudo. Also make sure
necessary root privilege commands are visible in your PATH. Or use
the `Defaults secure_path=' in /etc/sudoers.
necessary root privilege commands are visible in your PATH. The scripts
ensure that /usr/sbin is appended to the user's PATH when running
privileged commands.
For commands necessitating root privileges, the generated scripts wrap
them with the construct:
sudo -E sh << ROOT_EOF
sudo -E sh -e << ROOT_EOF
<commands to be executed as root with `$', ``', and `\' escaped>
ROOT_EOF
The -E switch ensures the whole environment is passed to the
commands to be run with root privileges. It is effective only if the
/etc/sudoers file contains `Defaults setenv', or SETENV in the user
attributes. If you think it is a security issue, you may forbid this
flag in /etc/sudoers, but then, you have to un-escape `$' for variables
coming from the environment in the instructions.
Although this construct is rather strong, it can fail in some corner
cases, so carefully review those instructions.
WARNING: One variable from the environment is not passed through the
-E switch, namely PATH. This is because "sudo" always reset the PATH to
the default "secure_path". If you need to have the same PATH as the user
"root" would have, you may want to add "source /etc/profile" at the
beginning of the commands to be executed as root.
The "-e" switch to sh ensures the command block exits with error if an
error occurs. The "-E" switch to sudo ensures the whole environment is
passed to the commands to be run with root privileges. It is effective
only if the /etc/sudoers file contains `Defaults setenv', or SETENV in
the user attributes (this is implicit if the command the user is allowed
to run is `ALL'). If you think it is a security issue, you may forbid
this flag in /etc/sudoers, but then, you have to un-escape `$' for
variables coming from the environment in the instructions. Although this
construct is rather strong, it can fail in some corner cases, so
carefully review those instructions.
Due to book layout issues, some sudo commands may be missing.