Linux: using multiple compilers

2002-07-29 20:04:49

Ok, i'm going to see if i can get some kind of responce here, i failed with google ...

anyway, let's say i have GCC 2.95.3 installed and want to install 3.1.1 as well, i when by doing this by ./configure --prefix=/usr/local/gcc311;make install

nice, took a while to compile, but now what ?
how do i tell the ./configure script to actually use THAT gcc instead of the normal 2.95.3 one ???

i hope someone here knows

EDIT: I'm not sure it's ok to post it under general so here it is ... any moderator is free to move it if they feel like it

Linux: using multiple compilers

Reply #1 – 2002-07-29 20:22:39

Usually it goes something like:

export CC=/path/to/compiler
./configure

Hope this helps,

Carsten Haese.

Linux: using multiple compilers

Reply #2 – 2002-07-29 20:35:47

so i should do:

export CC=/usr/local/gcc311/gcc
./configure


?

or is it
export CC=/usr/local/gcc311/
./configure


and what's the difference between set and export ?

Linux: using multiple compilers

Reply #3 – 2002-07-29 21:37:43

You should do the first, pointing the CC environment variable to the executable you wish to use.

Note that the instructions are for the bash shell. If you use a different shell, do whatever is necessary to set an environment variable in that shell. (E.g. something like 'setenv CC /usr/local/gcc311/gcc' for csh-like shells.)

The difference between set and export (in bash) is that 'export' sets environment variables, 'set' does not. I've never used set, but from what I gather from the info page, it seems to sets various options that control general shell behavior.

Maybe this helps now

Carsten Haese.