1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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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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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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15 | <para os="a">During the building of the cross-compile tools you will need to |
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16 | set a few variables that will be dependent on your particular needs. |
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17 | The first variable will be the triplet of the host machine, which will be |
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18 | put into the <envar>CLFS_HOST</envar> variable. To account for the |
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19 | possibility that the host and target are the same arch, as cross-compiling |
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20 | won't work when host and target are the same, part of the triplet needs to |
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21 | be changed slightly to add "cross". Set <envar>CLFS_HOST</envar> using the |
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22 | following command:</para> |
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23 | |
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24 | <screen os="b"><userinput>export CLFS_HOST="$(echo $MACHTYPE | sed "s/$(echo $MACHTYPE | cut -d- -f2)/cross/")"</userinput></screen> |
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25 | |
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26 | <para os="c">Now you will need to set the triplet for the target |
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27 | architecture. Set the target variable using the following command:</para> |
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28 | |
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29 | <screen os="d"><userinput>export CLFS_TARGET="arm-unknown-linux-gnu"</userinput></screen> |
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30 | |
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31 | <bridgehead renderas="sect4">Copy settings to Environment</bridgehead> |
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32 | |
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33 | <para os="e">Now add these to <filename>~/.bashrc</filename>, just in |
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34 | case you have to exit and restart building later:</para> |
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35 | |
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36 | <screen os="f"><userinput>echo export CLFS_HOST=\""${CLFS_HOST}\"" >> ~/.bashrc |
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37 | echo export CLFS_TARGET=\""${CLFS_TARGET}\"" >> ~/.bashrc</userinput></screen> |
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38 | |
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39 | </sect1> |
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