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| - | ====== Arch Linux and Xmega support in avr-gcc ====== | ||
| - | Unfortunately, the latest version of GCC does not support Atmel chips properly out-of-the-box. The only fix is to use an older version of the compiler and patch the heck out of it. The latest compiler does not support the newer Xmega series of chips at all. As Arch Linux only cares about version numbers, the default [[http://www.archlinux.org/packages/community/i686/gcc-avr/|gcc-avr packages]] are broken as they do not contain the necessary patches. A [[https://bugs.archlinux.org/task/25798|bug report]] exists for the issue, but it has not been addressed as the required versions of gcc and binutils are rather dated. | ||
| - | |||
| - | The solution is to build the three packages from older sources, apply the patches used in the [[http://www.freshports.org/devel/avr-gcc/|FreeBSD ports tree]], and then force pacman to ignore the 'ancient' packages. | ||
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| - | To build the packages, first download the modified PKGBUILDs: | ||
| - | |||
| - | * {{:en:linux:binutils-avr-2.20.1-1.pkgbuild}} | ||
| - | * {{:en:linux:gcc-avr-4.3.4-1.pkgbuild}} | ||
| - | * {{:en:linux:avr-libc-1.7.0-1.pkgbuild}} | ||
| - | |||
| - | Tell pacman to ignore updates to these packages by adding the following to ''/etc/pacman.conf'': | ||
| - | |||
| - | <code> | ||
| - | # ignore specific avr packages | ||
| - | IgnorePkg = binutils-avr gcc-avr avr-libc | ||
| - | </code> | ||
| - | |||
| - | Now, ensure the broken Arch packages are not installed: | ||
| - | |||
| - | <code> | ||
| - | # pacman -R avr-libc gcc-avr binutils-avr | ||
| - | </code> | ||
| - | |||
| - | Finally, build and install the packages: | ||
| - | <code> | ||
| - | $ mkdir binutils-avr | ||
| - | $ cp binutils-avr.*.pkgbuild binutils-avr/PKGBUILD | ||
| - | $ cd binutils-avr | ||
| - | $ makepkg -si | ||
| - | $ cd .. | ||
| - | $ mkdir gcc-avr | ||
| - | $ cp gcc-avr.*.pkgbuild gcc-avr/PKGBUILD | ||
| - | $ cd gcc-avr | ||
| - | $ makepkg -si | ||
| - | $ cd .. | ||
| - | $ mkdir avr-libc | ||
| - | $ cp avr-libc.*.pkgbuild avr-libc/PKGBUILD | ||
| - | $ cd avr-libc | ||
| - | $ makepkg -si | ||
| - | </code> | ||
| - | |||
| - | Finally, start coding for Xmega! | ||
| - | |||
| - | ~~DISCUSSION~~ | ||