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The default GCC package available in the Fedora 16 repositories is gcc-4.6. I need to install gcc-4.5 on my system.
I downloaded the packages from the kijo repository, but when I try to install them it shows that a newer libstdc++4.6 is installed. If I try to uninstall libstdc++4.6 it tries to uninstall the system itself! (Almost every package in the system). And it would not allow me install libstdc++4.5 along with libstdc++4.6.

Is there a easy way that I can install gcc-4.5 on my system?

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Why do you think that you need 4.5? –  Ignacio Vazquez-Abrams Feb 21 '12 at 5:01
@IgnacioVazquez-Abrams well the build of a particular package has succeded on gcc4.5 when it is throwing up errors in gcc4.6 . I have been asked to try the build using gcc4.5. –  salsabear Feb 21 '12 at 5:05
Erroring out on a newer version of GCC usually means that the code wasn't written according to the standard in the first place. –  Ignacio Vazquez-Abrams Feb 21 '12 at 5:07
@IgnacioVazquez-Abrams I feel the same , but I cannot help it –  salsabear Feb 21 '12 at 5:24
Perhaps you should kick the error messages over to Stack Overflow and let them have a crack at it. –  Ignacio Vazquez-Abrams Feb 21 '12 at 5:26
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1 Answer

up vote 1 down vote accepted

Getting the build errors worked out is preferable, so I hope that works out for you.

But it is possible to install alternate versions of gcc on Fedora. Just not from packages -- you'll need the source, available from http://gcc.gnu.org/. Look to download gcc-4.5.3.tar.gz from one of the download mirrors.

The following is modeled after some info by Zhongliang Chen on installing gcc-4.3 on Fedora 15.

Download and unpack the gcc source tarball. Make sure your Fedora 16 has the packages necessary for building:

yum install gcc mpfr-devel libmpc libmpc-devel glibc-devel

Then create a new, empty build directory and build gcc with a suffix of 45 -- you'll build compilers gcc45 and g++45 for example. You might want a new, separate install directory like /usr/local/gcc45/

$PATH_TO_SOURCE_DIR/configure --prefix=PATH_TO_INSTALL_DIR --program-suffix=45 --enable-languages=c,c++
$sudo make install
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Hey thanks. That took a while to compile but did work! –  salsabear Feb 21 '12 at 9:50
@Vamsi -- glad it helped. Could you mark my answer as accepted, if you are satisfied with it? –  Lars Rohrbach Feb 21 '12 at 19:41
after installation, I used update-alternatives to use the newly installed gcc and g++. How could I also update the libraries similarly? It seems like my program is still using the libraries of the previously installed gcc. And it seems like toolchain was built without thread support. I am also going to use threads. – Vamsi 1 min ago edit –  salsabear Feb 22 '12 at 1:07
Is this for running your program or for building your program? For building with your gcc45, you can add some -I and -L flags pointing to your new install include and lib directories. For running, perhaps modify your LD_LIBRARY_PATH similarly? –  Lars Rohrbach Feb 22 '12 at 7:57
the messed up part is that LD_LIBRARY_PATH only has a single directory which I am sure does not have any gcc libraries. –  salsabear Feb 22 '12 at 12:22
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