Built gcc 4.5.1 on amd64-unknown-openbsd4.8

[Kyle Markley <kyle at arbyte dot us>]

Hello,

Following the recommendations on 
http://gcc.gnu.org/install/finalinstall.html, I'm reporting my success 
at building gcc 4.5.1 on amd64-unknown-openbsd4.8 because this platform 
is not listed in http://gcc.gnu.org/buildstat.html.

$ ./config.guess
amd64-unknown-openbsd4.8

$ /tmp/usr/local/bin/g++-4.5.1 -v
Using built-in specs.
COLLECT_GCC=/tmp/usr/local/bin/g++-4.5.1
COLLECT_LTO_WRAPPER=/tmp/usr/local/bin/../libexec/gcc/x86_64-unknown-openbsd4.8/4.5.1/lto-wrapper
Target: x86_64-unknown-openbsd4.8
Configured with: ../gcc/configure --program-suffix=-4.5.1 
--enable-threads --enable-languages=c++ : (reconfigured) 
../gcc/configure --program-suffix=-4.5.1 --enable-threads 
--enable-languages=c++
Thread model: posix
gcc version 4.5.1 (GCC)


I found that gcc was difficult to build on this platform.  I started 
from the patches included with my OpenBSD 4.8 distribution's ports tree 
for gcc 4.3.  Many of these patches do not apply cleanly to the source 
code of 4.5.1 (due to code drift since 4.3) and I had to make many of 
the changes manually.  The most important patches were to gcc/config.gcc 
and libgcc/config.host so that my platform was recognized, and several 
changes in gcc/config/, but the patches from the ports tree got me most 
of the way through.

Finally, I hit this bug while building:
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39618
... but killing the process (as recommended at that link) let me 
proceed.


I don't think I have the expertise necessary to help maintain the 
health of gcc on OpenBSD for the long run, but I am interested in 
helping to make it easier to build on this platform.  Please let me know 
what I can do.

--
Kyle Markley