[ad36f39] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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[bd48e48] | 2 | <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
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| 3 | "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [ |
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[ad36f39] | 4 | <!ENTITY % general-entities SYSTEM "../../general.ent"> |
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| 5 | %general-entities; |
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| 6 | ]> |
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| 7 | |
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| 8 | <sect1 id="ch-cross-tools-variables"> |
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| 9 | <?dbhtml filename="variables.html"?> |
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| 10 | |
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| 11 | <title>Build Variables</title> |
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| 12 | |
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| 13 | <bridgehead renderas="sect4">Setting Host and Target</bridgehead> |
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| 14 | |
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[b220338] | 15 | <para os="a">During the building of the cross-compile tools, you will need to |
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[7926af1] | 16 | set a few variables that will be dependent on your particular needs. |
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[b220338] | 17 | You will need to select the target triplet for the target architecture, the CPU |
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| 18 | endianess, the CPU architecture, the CPU mode, the CPU floating point hardware |
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| 19 | availability, and (if available) the type of floating point hardware. If you |
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| 20 | do not know what values can be chosen for each of these, you can use the |
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| 21 | tables at the bottom of this page as a reference.</para> |
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| 22 | |
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| 23 | <para os="a1">First, set the host and target triplets:</para> |
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[ad36f39] | 24 | |
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| 25 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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[7926af1] | 26 | href="../common/variables.xml" |
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[5b4806a] | 27 | xpointer="xpointer(//*[@os='b'])"/> |
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[ad36f39] | 28 | |
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| 29 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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[7926af1] | 30 | href="../common/variables.xml" |
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[5b4806a] | 31 | xpointer="xpointer(//*[@os='c'])"/> |
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[ad36f39] | 32 | |
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[a9bbc46] | 33 | <screen os="d"><userinput>export CLFS_ARCH=arm |
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[29ca400] | 34 | export CLFS_ENDIAN="<replaceable>[endianess]</replaceable>"</userinput></screen> |
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[6533111] | 35 | |
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[b220338] | 36 | <para os="e">Choose the ARM architecture (see table below) and mode of |
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| 37 | your CPU:</para> |
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| 38 | |
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| 39 | <screen os="f"><userinput>export CLFS_ARM_ARCH="<replaceable>[architecture]</replaceable>" |
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| 40 | export CLFS_ARM_MODE="<replaceable>[arm or thumb]</replaceable>"</userinput></screen> |
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| 41 | |
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| 42 | <para os="f1">If your target CPU has hard floating point support (not all ARM |
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| 43 | CPUs do), set the following CLFS_FLOAT variable to either "hard" or "softfp". |
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| 44 | If your target CPU does not have hard floating point support, set the following |
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| 45 | CLFS_FLOAT vairable to "soft".</para> |
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| 46 | |
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| 47 | <screen os="f2"><userinput>export CLFS_FLOAT="<replaceable>[hard, softfp, or soft]"</replaceable></userinput></screen> |
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| 48 | |
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| 49 | <para os="f3">If you chose either "hard" or "softfp" for CLFS_FLOAT, you now |
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| 50 | need to set which floating point hardware is actually included (see table below) |
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| 51 | with your ARM CPU:</para> |
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| 52 | |
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| 53 | <screen os="f4"><userinput>export CLFS_FPU="<replaceable>[fpu version]</replaceable>"</userinput></screen> |
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| 54 | |
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[5b4806a] | 55 | <xi:include xmlns:xi="http://www.w3.org/2003/XInclude" |
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[7926af1] | 56 | href="../common/variables.xml" |
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[0dad5b9] | 57 | xpointer="xpointer(//*[@os='g'])"/> |
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[6533111] | 58 | |
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[b220338] | 59 | <screen os="h"><userinput>echo export CLFS_HOST=\""${CLFS_HOST}\"" >> ~/.bashrc |
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| 60 | echo export CLFS_TARGET=\""${CLFS_TARGET}\"" >> ~/.bashrc |
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| 61 | echo export CLFS_ARCH=\""${CLFS_ARCH}\"" >> ~/.bashrc |
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| 62 | echo export CLFS_ENDIAN=\""${CLFS_ENDIAN}\"" >> ~/.bashrc |
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| 63 | echo export CLFS_ARM_ARCH=\""${CLFS_ARM_ARCH}\"" >> ~/.bashrc |
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| 64 | echo export CLFS_ARM_MODE=\""${CLFS_ARM_MODE}\"" >> ~/.bashrc |
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| 65 | echo export CLFS_FLOAT=\""${CLFS_FLOAT}\"" >> ~/.bashrc |
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| 66 | echo export CLFS_FPU=\""${CLFS_FPU}\"" >> ~/.bashrc</userinput></screen> |
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[ad36f39] | 67 | |
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[0dad5b9] | 68 | <table os="i"> |
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[b220338] | 69 | <title>Example Processor Type, ABI, and Target Triplets</title> |
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[d44503cc] | 70 | <?dbfo table-width="7in" ?> |
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[3ca2208] | 71 | |
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| 72 | <tgroup cols="2"> |
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| 73 | |
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| 74 | <colspec colnum="1" colwidth="2.5in" colname="Processor"/> |
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[29ca400] | 75 | <colspec colnum="2" colwidth="1in" colname="Endianess"/> |
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[d44503cc] | 76 | <colspec colnum="3" colwidth="1in" colname="ABI"/> |
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| 77 | <colspec colnum="4" colwidth="2.5in" colname="Triplet"/> |
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[3ca2208] | 78 | |
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[ad36f39] | 79 | <thead> |
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| 80 | <row> |
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| 81 | <entry>Processor</entry> |
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[29ca400] | 82 | <entry>Endianess</entry> |
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[d44503cc] | 83 | <entry>ABI</entry> |
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[ad36f39] | 84 | <entry>Target Triplet</entry> |
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| 85 | </row> |
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| 86 | </thead> |
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[3ca2208] | 87 | |
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[ad36f39] | 88 | <tbody> |
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| 89 | <row> |
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[a9bbc46] | 90 | <entry>Generic arm</entry> |
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| 91 | <entry>little</entry> |
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[d44503cc] | 92 | <entry>OABI</entry> |
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[ad36f39] | 93 | <entry>arm-unknown-linux-uclibc</entry> |
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| 94 | </row> |
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| 95 | <row> |
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[ff29c76] | 96 | <entry>Generic arm, version 4</entry> |
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[a9bbc46] | 97 | <entry>little</entry> |
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[d44503cc] | 98 | <entry>OABI</entry> |
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[ff29c76] | 99 | <entry>armv4-unknown-linux-uclibc</entry> |
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| 100 | </row> |
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| 101 | <row> |
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| 102 | <entry>Generic arm, version 5</entry> |
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| 103 | <entry>little</entry> |
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| 104 | <entry>EABI</entry> |
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[885ee0e] | 105 | <entry>armv5l-unknown-linux-uclibceabi</entry> |
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[ad36f39] | 106 | </row> |
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| 107 | <row> |
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[a9bbc46] | 108 | <entry>Generic arm, version 5</entry> |
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| 109 | <entry>big</entry> |
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[ff29c76] | 110 | <entry>EABI</entry> |
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[885ee0e] | 111 | <entry>armv5b-unknown-linux-uclibceabi</entry> |
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[ad36f39] | 112 | </row> |
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[d44503cc] | 113 | <row> |
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| 114 | <entry>Generic arm</entry> |
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| 115 | <entry>little</entry> |
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| 116 | <entry>EABI</entry> |
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[885ee0e] | 117 | <entry>arm-unknown-linux-uclibceabi</entry> |
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[d44503cc] | 118 | </row> |
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[ff29c76] | 119 | <row> |
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| 120 | <entry>Generic arm, version 7-a </entry> |
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| 121 | <entry>little</entry> |
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| 122 | <entry>EABI</entry> |
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[885ee0e] | 123 | <entry>armv7a-unknown-linux-uclibceabi</entry> |
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[ff29c76] | 124 | </row> |
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[ad36f39] | 125 | </tbody> |
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[3ca2208] | 126 | |
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[ad36f39] | 127 | </tgroup> |
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[3ca2208] | 128 | |
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[ad36f39] | 129 | </table> |
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| 130 | |
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[b220338] | 131 | <table os="j"> |
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| 132 | <title>ARM Archiecture Choices</title> |
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| 133 | <?dbfo table-width="4in" ?> |
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| 134 | |
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| 135 | <tgroup cols="2"> |
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| 136 | |
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| 137 | <colspec colnum="1" colwidth="1in" colname="Arch Choice"/> |
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| 138 | <colspec colnum="2" colwidth="1in" colname="Arch Choice"/> |
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| 139 | <colspec colnum="3" colwidth="1in" colname="Arch Choice"/> |
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| 140 | <colspec colnum="4" colwidth="1in" colname="Arch Choice"/> |
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| 141 | |
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| 142 | <tbody> |
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| 143 | <row> |
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| 144 | <entry>armv2</entry> |
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| 145 | <entry>armv2a</entry> |
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| 146 | <entry>armv3</entry> |
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| 147 | <entry>armv3m</entry> |
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| 148 | </row> |
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| 149 | <row> |
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| 150 | <entry>armv4</entry> |
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| 151 | <entry>armv4t</entry> |
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| 152 | <entry>armv5</entry> |
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| 153 | <entry>armv5t</entry> |
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| 154 | </row> |
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| 155 | <row> |
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| 156 | <entry>armv5te</entry> |
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| 157 | <entry>armv6</entry> |
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| 158 | <entry>armv6j</entry> |
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| 159 | <entry>armv6t2</entry> |
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| 160 | </row> |
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| 161 | <row> |
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| 162 | <entry>armv6z</entry> |
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| 163 | <entry>armv6zk</entry> |
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| 164 | <entry>armv6-m</entry> |
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| 165 | <entry>armv7</entry> |
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| 166 | </row> |
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| 167 | <row> |
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| 168 | <entry>armv7-a</entry> |
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| 169 | <entry>armv7-r</entry> |
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| 170 | <entry>armv7-m</entry> |
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| 171 | <entry>iwmmxt</entry> |
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| 172 | </row> |
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| 173 | <row> |
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| 174 | <entry>iwmmxt2</entry> |
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| 175 | <entry>ep9312</entry> |
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| 176 | </row> |
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| 177 | </tbody> |
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| 178 | </tgroup> |
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| 179 | </table> |
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| 180 | |
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| 181 | <table os="j"> |
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| 182 | <title>ARM Hard Floating Point Versions</title> |
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| 183 | <?dbfo table-width="4in" ?> |
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| 184 | |
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| 185 | <tgroup cols="2"> |
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| 186 | |
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| 187 | <colspec colnum="1" colwidth="1in" colname="FPU Choice"/> |
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| 188 | <colspec colnum="2" colwidth="1in" colname="FPU Choice"/> |
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| 189 | <colspec colnum="3" colwidth="1in" colname="FPU Choice"/> |
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| 190 | <colspec colnum="4" colwidth="1in" colname="FPU Choice"/> |
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| 191 | |
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| 192 | <tbody> |
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| 193 | <row> |
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| 194 | <entry>fpa</entry> |
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| 195 | <entry>fpe2</entry> |
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| 196 | <entry>fpe3</entry> |
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| 197 | <entry>maverick</entry> |
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| 198 | </row> |
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| 199 | <row> |
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| 200 | <entry>vfp</entry> |
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| 201 | <entry>vfpv3</entry> |
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| 202 | <entry>vfpv3-fp16</entry> |
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| 203 | <entry>vfpv3-d16</entry> |
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| 204 | </row> |
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| 205 | <row> |
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| 206 | <entry>vfpv3-d16-fp16</entry> |
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| 207 | <entry>vfpv3xd</entry> |
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| 208 | <entry>vfpv3xd-fp16</entry> |
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| 209 | <entry>neon</entry> |
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| 210 | </row> |
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| 211 | <row> |
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| 212 | <entry>neon-fp16</entry> |
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| 213 | <entry>vfpv4</entry> |
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| 214 | <entry>vfpv4-d16</entry> |
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| 215 | <entry>fpv4-sp-d16</entry> |
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| 216 | </row> |
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| 217 | <row> |
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| 218 | <entry>neon-vfpv4</entry> |
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| 219 | </row> |
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| 220 | </tbody> |
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| 221 | </tgroup> |
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| 222 | </table> |
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| 223 | |
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[ad36f39] | 224 | </sect1> |
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