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Asked: 2026-06-05T13:57:03+00:00

In my box we have GCC 4.1.2 installed as root user but to compile

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In my box we have GCC 4.1.2 installed as root user but to compile LLVM and clang I needed a higher version of GCC. So I downloaded and installed GCC 4.5.0 in my local directory.

How can I make existing programs refer to GCC 4.5.0 libs and includes. 

> gcc --version
gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-46)
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

> which gcc
/usr/bin/gcc

> setenv PATH gcc-4.5.0/bin/gcc/gcc-4.5.0/bin:$PATH

> gcc --version
gcc (GCC) 4.5.0
Copyright (C) 2010 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

> which gcc
gcc-4.5.0/bin/gcc/gcc-4.5.0/bin/gcc

Is it that just setting the system PATH will help me or is there anything else I need to do for existing code to refer GCC 4.5.0 suite?

gcc-4.5.0/bin/gcc/gcc-4.5.0/> ls -l
total 24
drwxrwxr-x 2 prasad ppusers 4096 Jun 13 21:32 bin
drwxrwxr-x 3 prasad ppusers 4096 Jun 13 21:32 include
drwxrwxr-x 3 prasad ppusers 4096 Jun 13 21:32 lib
drwxrwxr-x 2 prasad ppusers 4096 Jun 13 21:32 lib64
drwxrwxr-x 3 prasad ppusers 4096 Jun 13 21:32 libexec
drwxrwxr-x 6 prasad ppusers 4096 Jun 13 21:32 share
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1 Answer

  1. Editorial Team

    The best way to do this varies greatly by your build system.

    For make (and possibly other systems) the C compiler is specified in the CC variable, so you can just call

    CC=/path/to/new/gcc make

    if the project uses configure scripts from autoconf, you can use something similar

    ./configure CC=/path/to/new/gcc
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