[Solved] Downgrading gcc

[wiccano]

Hi

I installed cuda 4.0 but this dont have support for gcc 4.5 or above.
how i do a secure downgrading of gcc (gcc 4.4.4 i supose)? or have two gcc instaled (4.5.2 and 4.4.4)?

Thanks, greetings from Chile

sorry my english

[gapan]

You don't downgrade gcc. Not unless you want everything broken. It is possible to install different gcc versions side by side, but it's not a straightforward task at all. You really need to know what you're doing. You will need to compile the gcc version you want from source, create a package while making sure no files from the already installed gcc will be replaced. When you have the older version working alongside the newer one, you will need to point CC to the old version, so the makefiles will use it.

You'd be better off if you searched for patches that make it build with the newer gcc, or file a bug report with the software developers. They will have to update their software at some point anyway.

[wiccano]

thanks for reply =D

At end, i downloaded source of gcc 4.4.6, compiled and installed it, and i did a little change in the configuration file of nvcc (cuda's compiler) and i can run the binaries samples =D. This is what i do:

Download gcc-4.4 source ftp://ftp.gnu.org/pub/gnu/gcc/gcc-4.4.6 ... .6.tar.bz2,

Code: Select all

# tar jxvf gcc-4.4.6.tar.bz2
# cd gcc-4.4.6
# ./configure --prefix=/opt/gcc44
# make
# make install

Add line to cuda/bin/nvcc.profile
compiler-bindir=/opt/gcc44/bin

The bad thing is my "tree of dependencies" is broken now, but all works.

The source all this.
http://www.reddit.com/r/Ubuntu/comments ... untu_1104/

it is the 5000 post in problems topics XD

Greetings