[02095ae] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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[c439b8a] | 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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[02095ae] | 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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[2e7a86a] | 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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[02095ae] | 23 | |
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[10d6394] | 24 | <screen os="b"><userinput>export CLFS_HOST="$(echo $MACHTYPE | sed "s/$(echo $MACHTYPE | cut -d- -f2)/cross/")"</userinput></screen> |
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[02095ae] | 25 | |
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[2e7a86a] | 26 | <para os="c">Now you will need to set the triplet for the target |
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| 27 | architecture. Set the target variable using the following command:</para> |
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[02095ae] | 28 | |
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[8ef222d] | 29 | <screen os="d"><userinput>export CLFS_TARGET="arm-unknown-linux-gnu"</userinput></screen> |
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[02095ae] | 30 | |
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| 31 | <bridgehead renderas="sect4">Copy settings to Environment</bridgehead> |
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| 32 | |
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[2e7a86a] | 33 | <para os="e">Now add these to <filename>~/.bashrc</filename>, just in |
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[02095ae] | 34 | case you have to exit and restart building later:</para> |
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| 35 | |
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[3d7a86a] | 36 | <screen os="f"><userinput>echo export CLFS_HOST=\""${CLFS_HOST}\"" >> ~/.bashrc |
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| 37 | echo export CLFS_TARGET=\""${CLFS_TARGET}\"" >> ~/.bashrc</userinput></screen> |
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[02095ae] | 38 | |
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| 39 | </sect1> |
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