2012-11-11 04:14:42 +01:00
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// -*- mode:doc; -*-
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2013-02-13 13:59:02 +01:00
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// vim: set syntax=asciidoc:
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2012-11-11 04:14:42 +01:00
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2014-08-19 21:41:47 +02:00
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== General Buildroot usage
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include::make-tips.txt[]
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2012-11-11 04:14:42 +01:00
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include::rebuilding-packages.txt[]
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2012-11-11 04:14:44 +01:00
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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 07:47:30 +02:00
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=== Offline builds
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2012-11-11 04:14:44 +01:00
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If you intend to do an offline build and just want to download
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all sources that you previously selected in the configurator
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2013-12-09 01:07:40 +01:00
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('menuconfig', 'nconfig', 'xconfig' or 'gconfig'), then issue:
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2012-11-11 04:14:44 +01:00
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--------------------
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$ make source
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--------------------
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You can now disconnect or copy the content of your +dl+
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directory to the build-host.
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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 07:47:30 +02:00
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=== Building out-of-tree
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2012-11-11 04:14:44 +01:00
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As default, everything built by Buildroot is stored in the directory
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2012-11-16 05:54:19 +01:00
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+output+ in the Buildroot tree.
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2012-11-11 04:14:44 +01:00
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Buildroot also supports building out of tree with a syntax similar to
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the Linux kernel. To use it, add +O=<directory>+ to the make command
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line:
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--------------------
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$ make O=/tmp/build
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--------------------
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Or:
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--------------------
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$ cd /tmp/build; make O=$PWD -C path/to/buildroot
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--------------------
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2014-02-21 23:17:54 +01:00
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All the output files will be located under +/tmp/build+. If the +O+
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path does not exist, Buildroot will create it.
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*Note:* the +O+ path can be either an absolute or a relative path, but if it's
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passed as a relative path, it is important to note that it is interpreted
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relative to the main Buildroot source directory, *not* the current working
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directory.
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2012-11-11 04:14:44 +01:00
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When using out-of-tree builds, the Buildroot +.config+ and temporary
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files are also stored in the output directory. This means that you can
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safely run multiple builds in parallel using the same source tree as
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long as they use unique output directories.
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For ease of use, Buildroot generates a Makefile wrapper in the output
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2014-02-21 23:17:54 +01:00
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directory - so after the first run, you no longer need to pass +O=<...>+
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and +-C <...>+, simply run (in the output directory):
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2012-11-11 04:14:44 +01:00
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--------------------
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$ make <target>
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--------------------
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[[env-vars]]
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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 07:47:30 +02:00
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=== Environment variables
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2012-11-11 04:14:44 +01:00
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Buildroot also honors some environment variables, when they are passed
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to +make+ or set in the environment:
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* +HOSTCXX+, the host C++ compiler to use
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* +HOSTCC+, the host C compiler to use
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* +UCLIBC_CONFIG_FILE=<path/to/.config>+, path to
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the uClibc configuration file, used to compile uClibc, if an
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internal toolchain is being built.
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+
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Note that the uClibc configuration file can also be set from the
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2012-11-27 12:59:16 +01:00
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configuration interface, so through the Buildroot +.config+ file; this
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2012-11-16 05:54:19 +01:00
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is the recommended way of setting it.
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2012-11-11 04:14:44 +01:00
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+
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* +BUSYBOX_CONFIG_FILE=<path/to/.config>+, path to
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2014-05-31 09:55:35 +02:00
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the BusyBox configuration file.
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2012-11-11 04:14:44 +01:00
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+
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2014-05-31 09:55:35 +02:00
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Note that the BusyBox configuration file can also be set from the
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2012-11-27 12:59:16 +01:00
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configuration interface, so through the Buildroot +.config+ file; this
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2012-11-16 05:54:19 +01:00
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is the recommended way of setting it.
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2012-11-11 04:14:44 +01:00
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+
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2015-10-15 15:24:39 +02:00
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* +BR2_CCACHE_DIR+ to override the directory where
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Buildroot stores the cached files when using ccache.
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+
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2014-02-04 16:18:51 +01:00
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* +BR2_DL_DIR+ to override the directory in which
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2012-11-11 04:14:44 +01:00
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Buildroot stores/retrieves downloaded files
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+
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Note that the Buildroot download directory can also be set from the
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2017-02-06 22:59:33 +01:00
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configuration interface, so through the Buildroot +.config+ file. See
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xref:download-location[] for more details on how you can set the download
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directory.
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2014-02-24 22:40:48 +01:00
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* +BR2_GRAPH_ALT+, if set and non-empty, to use an alternate color-scheme in
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2013-12-28 18:39:11 +01:00
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build-time graphs
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2014-02-24 22:40:48 +01:00
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* +BR2_GRAPH_OUT+ to set the filetype of generated graphs, either +pdf+ (the
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2013-12-28 18:39:13 +01:00
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default), or +png+.
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2014-05-16 23:05:13 +02:00
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* +BR2_GRAPH_DEPS_OPTS+ to pass extra options to the dependency graph; see
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xref:graph-depends[] for the accepted options
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2014-06-08 16:03:53 +02:00
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* +BR2_GRAPH_DOT_OPTS+ is passed verbatim as options to the +dot+ utility to
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draw the dependency graph.
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2012-11-11 04:14:44 +01:00
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An example that uses config files located in the toplevel directory and
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in your $HOME:
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--------------------
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$ make UCLIBC_CONFIG_FILE=uClibc.config BUSYBOX_CONFIG_FILE=$HOME/bb.config
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--------------------
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If you want to use a compiler other than the default +gcc+
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or +g+++ for building helper-binaries on your host, then do
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--------------------
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$ make HOSTCXX=g++-4.3-HEAD HOSTCC=gcc-4.3-HEAD
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--------------------
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2014-01-07 23:46:08 +01:00
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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 07:47:30 +02:00
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=== Dealing efficiently with filesystem images
|
2014-01-07 23:46:08 +01:00
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Filesystem images can get pretty big, depending on the filesystem you choose,
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the number of packages, whether you provisioned free space... Yet, some
|
2014-03-28 22:24:49 +01:00
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locations in the filesystems images may just be _empty_ (e.g. a long run of
|
2014-01-07 23:46:08 +01:00
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'zeroes'); such a file is called a _sparse_ file.
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Most tools can handle sparse files efficiently, and will only store or write
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those parts of a sparse file that are not empty.
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For example:
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* +tar+ accepts the +-S+ option to tell it to only store non-zero blocks
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of sparse files:
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** +tar cf archive.tar -S [files...]+ will efficiently store sparse files
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in a tarball
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** +tar xf archive.tar -S+ will efficiently store sparse files extracted
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from a tarball
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* +cp+ accepts the +--sparse=WHEN+ option (+WHEN+ is one of +auto+,
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+never+ or +always+):
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** +cp --sparse=always source.file dest.file+ will make +dest.file+ a
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sparse file if +source.file+ has long runs of zeroes
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Other tools may have similar options. Please consult their respective man
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pages.
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|
2014-03-28 22:24:49 +01:00
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You can use sparse files if you need to store the filesystem images (e.g.
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to transfer from one machine to another), or if you need to send them (e.g.
|
2014-01-07 23:46:08 +01:00
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to the Q&A team).
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Note however that flashing a filesystem image to a device while using the
|
2014-03-28 22:24:49 +01:00
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sparse mode of +dd+ may result in a broken filesystem (e.g. the block bitmap
|
2014-01-07 23:46:08 +01:00
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of an ext2 filesystem may be corrupted; or, if you have sparse files in
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your filesystem, those parts may not be all-zeroes when read back). You
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should only use sparse files when handling files on the build machine, not
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when transferring them to an actual device that will be used on the target.
|
2014-02-23 16:04:31 +01:00
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|
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 07:47:30 +02:00
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=== Graphing the dependencies between packages
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2014-02-23 16:04:31 +01:00
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[[graph-depends]]
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One of Buildroot's jobs is to know the dependencies between packages,
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and make sure they are built in the right order. These dependencies
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can sometimes be quite complicated, and for a given system, it is
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often not easy to understand why such or such package was brought into
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the build by Buildroot.
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In order to help understanding the dependencies, and therefore better
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understand what is the role of the different components in your
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embedded Linux system, Buildroot is capable of generating dependency
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graphs.
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To generate a dependency graph of the full system you have compiled,
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simply run:
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------------------------
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make graph-depends
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------------------------
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You will find the generated graph in
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+output/graphs/graph-depends.pdf+.
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If your system is quite large, the dependency graph may be too complex
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and difficult to read. It is therefore possible to generate the
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dependency graph just for a given package:
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------------------------
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make <pkg>-graph-depends
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------------------------
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You will find the generated graph in
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+output/graph/<pkg>-graph-depends.pdf+.
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Note that the dependency graphs are generated using the +dot+ tool
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from the _Graphviz_ project, which you must have installed on your
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system to use this feature. In most distributions, it is available as
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the +graphviz+ package.
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By default, the dependency graphs are generated in the PDF
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2014-02-24 22:40:48 +01:00
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format. However, by passing the +BR2_GRAPH_OUT+ environment variable, you
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2014-02-23 16:04:31 +01:00
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can switch to other output formats, such as PNG, PostScript or
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SVG. All formats supported by the +-T+ option of the +dot+ tool are
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supported.
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--------------------------------
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2014-02-24 22:40:48 +01:00
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BR2_GRAPH_OUT=svg make graph-depends
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2014-02-23 16:04:31 +01:00
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--------------------------------
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2014-02-23 16:04:32 +01:00
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2014-05-16 23:05:13 +02:00
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The +graph-depends+ behaviour can be controlled by setting options in the
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+BR2_GRAPH_DEPS_OPTS+ environment variable. The accepted options are:
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* +--depth N+, +-d N+, to limit the dependency depth to +N+ levels. The
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default, +0+, means no limit.
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2015-03-24 23:16:51 +01:00
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* +--stop-on PKG+, +-s PKG+, to stop the graph on the package +PKG+.
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2016-01-27 21:32:15 +01:00
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+PKG+ can be an actual package name, a glob, the keyword 'virtual'
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(to stop on virtual packages), or the keyword 'host' (to stop on
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host packages). The package is still present on the graph, but its
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dependencies are not.
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2015-03-24 23:16:51 +01:00
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* +--exclude PKG+, +-x PKG+, like +--stop-on+, but also omits +PKG+ from
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the graph.
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2014-06-08 16:03:53 +02:00
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* +--transitive+, +--no-transitive+, to draw (or not) the transitive
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2014-06-10 00:28:56 +02:00
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dependencies. The default is to not draw transitive dependencies.
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2014-06-08 16:03:53 +02:00
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2018-03-31 18:35:40 +02:00
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* +--colors R,T,H+, the comma-separated list of colors to draw the
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2014-06-08 16:03:53 +02:00
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root package (+R+), the target packages (+T+) and the host packages
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(+H+). Defaults to: +lightblue,grey,gainsboro+
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2014-05-16 23:05:13 +02:00
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--------------------------------
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2018-03-31 18:35:40 +02:00
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BR2_GRAPH_DEPS_OPTS='-d 3 --no-transitive --colors=red,green,blue' make graph-depends
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2014-05-16 23:05:13 +02:00
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--------------------------------
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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 07:47:30 +02:00
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=== Graphing the build duration
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2014-02-23 16:04:32 +01:00
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[[graph-duration]]
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When the build of a system takes a long time, it is sometimes useful
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to be able to understand which packages are the longest to build, to
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see if anything can be done to speed up the build. In order to help
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such build time analysis, Buildroot collects the build time of each
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2014-02-24 09:58:04 +01:00
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step of each package, and allows to generate graphs from this data.
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2014-02-23 16:04:32 +01:00
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To generate the build time graph after a build, run:
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----------------
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make graph-build
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----------------
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This will generate a set of files in +output/graphs+ :
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2014-02-24 09:58:04 +01:00
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* +build.hist-build.pdf+, a histogram of the build time for each
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2014-02-23 16:04:32 +01:00
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package, ordered in the build order.
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2014-02-24 09:58:04 +01:00
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* +build.hist-duration.pdf+, a histogram of the build time for each
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2014-02-23 16:04:32 +01:00
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package, ordered by duration (longest first)
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2014-02-24 09:58:04 +01:00
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* +build.hist-name.pdf+, a histogram of the build time for each
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2014-02-23 16:04:32 +01:00
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package, order by package name.
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* +build.pie-packages.pdf+, a pie chart of the build time per package
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* +build.pie-steps.pdf+, a pie chart of the global time spent in each
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step of the packages build process.
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This +graph-build+ target requires the Python Matplotlib and Numpy
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libraries to be installed (+python-matplotlib+ and +python-numpy+ on
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most distributions), and also the +argparse+ module if you're using a
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Python version older than 2.7 (+python-argparse+ on most
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distributions).
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By default, the output format for the graph is PDF, but a different
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2014-02-24 22:40:48 +01:00
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format can be selected using the +BR2_GRAPH_OUT+ environment variable. The
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2014-02-23 16:04:32 +01:00
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only other format supported is PNG:
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----------------
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2014-02-24 22:40:48 +01:00
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BR2_GRAPH_OUT=png make graph-build
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2014-02-23 16:04:32 +01:00
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----------------
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2014-08-19 21:41:47 +02:00
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2015-10-17 15:33:45 +02:00
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=== Graphing the filesystem size contribution of packages
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When your target system grows, it is sometimes useful to understand
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how much each Buildroot package is contributing to the overall root
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filesystem size. To help with such an analysis, Buildroot collects
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data about files installed by each package and using this data,
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2016-01-19 13:43:52 +01:00
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generates a graph and CSV files detailing the size contribution of
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2015-10-17 15:33:45 +02:00
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the different packages.
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To generate these data after a build, run:
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----------------
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make graph-size
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----------------
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This will generate:
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* +output/graphs/graph-size.pdf+, a pie chart of the contribution of
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each package to the overall root filesystem size
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* +output/graphs/package-size-stats.csv+, a CSV file giving the size
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contribution of each package to the overall root filesystem size
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* +output/graphs/file-size-stats.csv+, a CSV file giving the size
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contribution of each installed file to the package it belongs, and
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to the overall filesystem size.
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2016-01-19 13:43:52 +01:00
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This +graph-size+ target requires the Python Matplotlib library to be
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2015-10-17 15:33:45 +02:00
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installed (+python-matplotlib+ on most distributions), and also the
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2016-01-19 13:43:52 +01:00
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+argparse+ module if you're using a Python version older than 2.7
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2015-10-17 15:33:45 +02:00
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(+python-argparse+ on most distributions).
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Just like for the duration graph, a +BR2_GRAPH_OUT+ environment is
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supported to adjust the output file format. See xref:graph-depends[]
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for details about this environment variable.
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.Note
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The collected filesystem size data is only meaningful after a complete
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clean rebuild. Be sure to run +make clean all+ before using +make
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2016-01-19 13:43:52 +01:00
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graph-size+.
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2015-10-17 15:33:45 +02:00
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2016-02-02 14:05:59 +01:00
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To compare the root filesystem size of two different Buildroot compilations,
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for example after adjusting the configuration or when switching to another
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Buildroot release, use the +size-stats-compare+ script. It takes two
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+file-size-stats.csv+ files (produced by +make graph-size+) as input.
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Refer to the help text of this script for more details:
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----------------
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2017-07-01 18:40:40 +02:00
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utils/size-stats-compare -h
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2016-02-02 14:05:59 +01:00
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----------------
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2014-08-19 21:41:47 +02:00
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include::eclipse-integration.txt[]
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include::advanced.txt[]
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