2021-10-11 03:22:53 +00:00
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= Cross Toolchain =
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Setting up the tool chain involves getting a compiler for a different
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architechure compiled on your machine. With gentoo its pretty straight forward,
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and thats what this are instructions for. This example uses avr, but can be
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subsititued for arm if needbe
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== Cross-compiler toolchain ==
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2021-12-04 02:00:01 +00:00
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Here is how to get the cross compiler toolchain setup, at least on gentoo (for
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this example we are using AVR)
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2021-10-11 03:22:53 +00:00
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1) emerge sys-devel/crossdev
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- Gentoo package for crossdev tools
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2) mkdir -p /var/db/repos/portage-crossdev/{profiles,metadata} && echo 'crossdev'
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> /var/db/repos/portage-crossdev/profiles/repo_name && echo 'masters =
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gentoo' > /var/db/repos/portage-crossdev/metadata/layout.conf && chown -R
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portage:portage /var/db/repos/portage-crossdev
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- All of this sets up a local portage repo, for compiling tools for other
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systems
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3) have portage and crossdev use this new repo \
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{{{
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#/etc/portage/repos.conf/crossdev.conf
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[crossdev]
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location = /var/db/repos/portage-crossdev
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priority = 10
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masters = gentoo
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auto-sync = no
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}}}
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- This tells portage about crossdev and that packages can be in it, but not
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to try and update them with out our permission
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4) Add the following to a new file
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{{{
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#/etc/portage/profile/package.use.force/avr-STRING_HERE
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cross-avr/gcc -pie -pic
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}}}
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5) crossdev -s4 --stable --portage --verbose --target avr
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- s4 means to build everything from binutils to a full compiler
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- stable means to use latest stable versions
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- portage tells what flas to pass to emerge
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- target specifies our target, the avr arch.
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- *For arm specificy arm, this also includes other things like pis*
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6) If any errors are thrown, follow them and try again. Common errors include
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- make package.mask a directory
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[[index]]
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