Get the following source packages
You need a native GNAT compiler on your system. Nowadays almost all Linux distributions contain the Ada enabled gcc. If your system compiler is not yet gcc-4.7, get the latest gcc-4.7 sources and build a new native compiler first (for at least C and Ada). On Windows use the MinGW installer mingw-get to install gcc with Ada support. It works well to rebuild gcc-4.7.
You need the GNU binutils and the avr-libc library. The first is available on any GNU mirror. Take version 2.20.1. The latter is available from the AVR libc home page. Any version after 1.0 will do. I use the release 1.8.0.
The gcc sources must be from the 4.7 branch of gcc. I did all my tests and modifications on gcc-4.7.1 or gcc-4.7.2.
Get the latest binutils and gcc patches from the AVR-Ada project. They are included in the full AVR-Ada source release in the directories
Have a look at the shell script build-avr-ada.sh in the tools/build/ directory. It automates the build process and we use it exclusively for building our compilers and tools. For a full description of how to use the current build script see the [BuildScript] page.
Using Ubuntu Linux 8.10 (Intrepid Beta), I had to take the following steps:
copy and remove the patches as described:
$ cp -a patches/gcc/4.3.0 patches/gcc/4.3.2
$ cd patches/gcc/4.3.2
$ rm 40-0-gcc-4.3.0-bug-10768.patch
$ rm 40-1-gcc-4.3.0-bug-30243.patch
$ rm 40-8-gcc-4.3.0-bug-35519.patch
$ rm 40-9-gcc-4.3.0-bug-35542.patch
$ rm 41-0-gcc-4.3.0-bug-34932.patch
$ rm 41-1-gcc-4.3.0-bug-leaf.patch
copy the three attached binutils patches to patches/binutils/2.18 (see the AVR-Ada mailing list archives as of 2008-10-24)
Note: The configure-makeinfo patch fixes one bug, backported from 2.19. The other patches are necessary because of stricter rules of gcc-4.3.2. Then: