Hi!
We have to install gcc4.3. To which we believe we have to un-install gc-4.4. We are working on Fedora 12.

About OS :

$uname -a
Linux troy 2.6.32.9-67.fc12.x86_64 #1 SMP Sat Feb 27 09:26:40 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux

About gcc :

$ gcc -v
Using built-in specs.
Target: x86_64-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap --enable-shared --enable-threads=posix --enable-checking=release --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk --disable-dssi --enable-plugin --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-1.5.0.0/jre --enable-libgcj-multifile --enable-java-maintainer-mode --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux
Thread model: posix
gcc version 4.4.3 20100127 (Red Hat 4.4.3-4) (GCC)


Now, we want gcc 4.3 to be running.



Thanks in advance.

Regards,
-teamcoders

2 versions of gcc should be able to exist. Fedora has you, so uninstalls are not an issue except to say that if it asks you stupid questions, don't give stupid answers :-).

The way to use another gcc is put it elsewhere (e.g. /opt, /usr/local) and tweak the path to put that directory before /usr/bin. You can also use
"CC=/opt/my_other/gcc" make

Welcome to LQ.

Please do not remove the default gcc / g++ (c++) version 4.4.x .
You can have all the compilers, you want, installed at the same time.
The main = the default gcc / c++, and then some "compat" compilers,
meaning : they are created to have no conflicting files.
The defaults compats for Fedora are:
compat-gcc-34-3.4.6, compat-gcc-34-c++-3.4.6.

I also have these installed on Fedora 12 ( i686 ) :
gcc3.3-3.3.6 / gcc3.3-c++-3.3.6 (PCLinuxOS packages.)
and gcc43-4.3.4 / gcc43-c++-4.3.4 , Suse 11.2 packages ...
You will need :
gcc43-4.3.4_20090804-2.4.x86_64.rpm
gcc43-c++-4.3.4_20090804-2.4.x86_64.rpm
Also required:
cpp43-4.3.4_20090804-2.4.x86_64.rpm
libstdc++43-devel-4.3.4_20090804-2.4.x86_64.rpm
http://download.opensuse.org/distrib...s/suse/x86_64/

Please move all four packages to an empty folder and install with :
# rpm -Uvh --nodeps <package> <package> <package> <package>
Reason for --nodeps :
The already installed Fedora libgcc etc, have different names.
.....

Using gcc-4.3, example : make CC=gcc-4.3 CXX=g++-4.3
Or edit your Makefile.in to CC=gcc-4.3, CXX=g++-4.3
.....