1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE section PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
<section id="enea-linux-sysreq">
<title>System Requirements</title>
<para>The host requirements listed below are extensive to allow for the
building of Linux images via the Yocto system, and not just
applications.</para>
<para>Please also see the system requirements in the Yocto 2.1 documents:
Yocto Project Start <ulink
url="http://www.yoctoproject.org/docs/2.1/yocto-project-qs/yocto-project-qs.html#yp-resources">
http://www.yoctoproject.org/docs/2.1/yocto-project-qs/yocto-project-qs.html#yp-resources</ulink>
and the Yocto Project Reference Manual <ulink
url="http://www.yoctoproject.org/docs/2.1/ref-manual/ref-manual.html#intro-requirements">
http://www.yoctoproject.org/docs/2.1/ref-manual/ref-manual.html#intro-requirements</ulink>.
If needed, replace the Yocto version in the links provided with a more
recent version.</para>
<informaltable>
<tgroup cols="2">
<colspec align="left" colname="1" colwidth="1*" />
<colspec align="left" colname="2" colwidth="3*" />
<spanspec nameend="2" namest="1" spanname="onetwo" />
<tbody>
<row>
<entry spanname="onetwo"><emphasis role="bold"> Build host
requirements<indexterm>
<primary>system requirements</primary>
</indexterm></emphasis></entry>
</row>
<row>
<entry>Linux distribution</entry>
<entry>The downloaded code shall be built on a Linux host to
generate images for your target or for emulation in QEMU. For
information about the supported hosts and targets, see the <emphasis
role="bold">Enea Linux Release Information</emphasis> in your Enea
Linux distribution.</entry>
</row>
<row>
<entry>Internet access</entry>
<entry>Internet access must be available when building an image,
since bitbake downloads source files from various servers during the
build.</entry>
</row>
<row>
<entry>Packages</entry>
<entry>Depending on the Linux distribution and version on host, some
packages may be required, by bitbake for example. You will install
any required packages while following the installation
instructions.</entry>
</row>
<row>
<entry>Targets</entry>
<entry>Images can be built or downloaded for any of the targets
supported in this release, as specified in the <emphasis
role="bold">Enea Linux Release Information</emphasis>.</entry>
</row>
<row>
<entry>Disk space</entry>
<entry><para>Your system should have at least 50 GB of free disk
space when bitbaking the basic enea-image-name kernel image.</para>
<para>For larger images and to allow for future package extensions
and variations in the build process, a minimum of 100 GB free disk
space is recommended.</para></entry>
</row>
<row>
<entry>Recommended RAM</entry>
<entry><para>Your system must have at least 4 GB available
RAM.</para> <para>It is recommended to have 8 GB RAM available for
parallel build jobs.</para></entry>
</row>
<row>
<entry>Java</entry>
<entry>Java <indexterm>
<primary>java</primary>
</indexterm>is required to run Eclipse. Currenly, Eclipse
generally recommends at least Java 6 JRE/JDK. More information
regarding operating environments for Eclipse, is provided in the
<emphasis>Eclipse Project Release Notes</emphasis> for the version
used. This can usually be found via
http://www.eclipse.org/eclipse/development/readme_eclipse_version.
See the <emphasis role="bold">Enea Linux Release Information
</emphasis>for the Eclipse Version.</entry>
</row>
</tbody>
</tgroup>
</informaltable>
<para>The build time depends on the capacity of the processor and other
hardware, available resources, speed of internet connection, load situation,
etc. E.g: on a fast 16 core machine with 16 GB RAM and SSD disks, a complete
build from source could take about two hours.</para>
<informaltable>
<tgroup cols="2">
<colspec align="left" colname="1" colwidth="1*" />
<colspec align="left" colname="2" colwidth="3*" />
<spanspec nameend="2" namest="1" spanname="onetwo" />
<tbody>
<row>
<entry spanname="onetwo"><emphasis role="bold">Target
Requirements</emphasis></entry>
</row>
<row>
<entry>External memory</entry>
<entry>To boot a CGL<indexterm>
<primary>CGL</primary>
</indexterm> image, you need at least 16 GB on a hard-disk
drive<indexterm>
<primary>HDD</primary>
</indexterm> on eSATA, USB drive, or SD card.<remark>INFO: (packed
rootfs 4.5 GB + unpacked rootfs 1.5 GB + good
margins)</remark><remark>INFO: NFS does not support SELinux. In
order to have a security-enhanced Linux, one must take off from an
NFS-booted system and proceed with boot from external
memory.</remark></entry>
</row>
</tbody>
</tgroup>
</informaltable>
<section id="ensure-bash">
<title>System Shell Configuration</title>
<para>Before installing Enea Linux, ensure that bash is the default
shell.</para>
<para>If your system runs Ubuntu, you can use ls -l to ensure
<filename>/usr/bin</filename> is a symbolic link to bash. In case the link
points to dash, which is default in some Ubuntu versions, change it to
bash by running <emphasis role="bold">sudo dpkg-reconfigure
dash</emphasis> and answer <emphasis role="bold">No</emphasis> to the
question "Use dash as the default system shell (/bin/sh)?":</para>
<programlisting># ls -l /bin/sh
lrwxrwxrwx 1 root root 4 2012-03-02 11:53 /bin/sh -> bash</programlisting>
</section>
</section>
|
