buildrootschalter/docs/manual/prerequisite.txt
Thomas De Schampheleire 86a415df8a manual: use one-line titles instead of two-line titles (trivial)
Asciidoc supports two syntaxes for section titles: two-line titles (title
plus underline consisting of a particular symbol), and one-line titles
(title prefixed with a specific number of = signs).

The two-line title underlines are:
Level 0 (top level):     ======================
Level 1:                 ----------------------
Level 2:                 ~~~~~~~~~~~~~~~~~~~~~~
Level 3:                 ^^^^^^^^^^^^^^^^^^^^^^
Level 4 (bottom level):  ++++++++++++++++++++++

and the one-line title prefixes:
= Document Title (level 0) =
== Section title (level 1) ==

=== Section title (level 2) ===
==== Section title (level 3) ====
===== Section title (level 4) =====

The buildroot manual is currenly using the two-line titles, but this has
multiple disadvantages:

- asciidoc also uses some of the underline symbols for other purposes (like
  preformatted code, example blocks, ...), which makes it difficult to do
  mass replacements, such as a planned follow-up patch that needs to move
  all sections one level down.

- it is difficult to remember which level a given underline symbol (=-~^+)
  corresponds to, while counting = signs is easy.

This patch changes all two-level titles to one-level titles in the manual.
The bulk of the change was done with the following Python script, except for
the level 1 titles (-----) as these underlines are also used for literal
code blocks.
This patch only changes the titles, no other changes. In
adding-packages-directory.txt, I did add missing newlines between some
titles and their content.

----------------------------------------------------------------------------
#!/usr/bin/env python

import sys
import mmap
import re

for input in sys.argv[1:]:

    f = open(input, 'r+')
    f.flush()
    s = mmap.mmap(f.fileno(), 0)

    # Level 0 (top level):     ======================   =
    # Level 1:                 ----------------------   ==
    # Level 2:                 ~~~~~~~~~~~~~~~~~~~~~~   ===
    # Level 3:                 ^^^^^^^^^^^^^^^^^^^^^^   ====
    # Level 4 (bottom level):  ++++++++++++++++++++++   =====

    def replace_title(s, symbol, replacement):
        pattern = re.compile(r'(.+\n)\%s{2,}\n' % symbol, re.MULTILINE)
        return pattern.sub(r'%s \1' % replacement, s)

    new = s
    new = replace_title(new, '=', '=')
    new = replace_title(new, '+', '=====')
    new = replace_title(new, '^', '====')
    new = replace_title(new, '~', '===')
    #new = replace_title(new, '-', '==')

    s.seek(0)
    s.write(new)
    s.resize(s.tell())
    s.close()
    f.close()

----------------------------------------------------------------------------

Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-05-02 10:27:59 +02:00

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// -*- mode:doc; -*-
// vim: set syntax=asciidoc:
[[requirement]]
== System requirements
Buildroot is designed to run on Linux systems.
Buildroot needs some software to be already installed on the host
system; here are the lists of the mandatory and optional packages
(package names may vary between distributions).
Take care to _install both runtime and development data_, especially
for the libraries that may be packaged in 2 distinct packages.
[[requirement-mandatory]]
=== Mandatory packages
* Build tools:
** +which+
** +sed+
** +make+ (version 3.81 or any later)
** +binutils+
** +build-essential+ (only for Debian based systems)
** +gcc+ (version 2.95 or any later)
** `g++` (version 2.95 or any later)
** +bash+
** +patch+
** +gzip+
** +bzip2+
** +perl+ (version 5.8.7 or any later)
** +tar+
** +cpio+
** +python+ (version 2.6 or 2.7)
** +unzip+
** +rsync+
* Source fetching tools:
** +wget+
[[requirement-optional]]
=== Optional packages
* Source fetching tools:
+
In the official tree, most of the package sources are retrieved
using +wget+; a few are only available through their +git+, +mercurial+,
+svn+ or +cvs+ repository.
+
All other source fetching methods are implemented and may be used in a
development context (further details: refer to xref:download-infra[]).
+
** +bazaar+
** +cvs+
** +git+
** +mercurial+
** +rsync+
** +scp+
** +subversion+
* Configuration interface dependencies (requires development libraries):
** +ncurses5+ to use the 'menuconfig' interface
** +qt4+ to use the 'xconfig' interface
** +glib2+, +gtk2+ and +glade2+ to use the 'gconfig' interface
* Java-related packages, if the Java Classpath needs to be built for
the target system:
** The +javac+ compiler
** The +jar+ tool
* Documentation generation tools:
** +asciidoc+, version 8.6.3 or higher
** +w3m+
** +python+ with the +argparse+ module (automatically present in 2.7+ and 3.2+)
** +dblatex+ (required for the pdf manual only)