fred smith wrote: > > the build process explicitly checks for python 2.7 or greater, so how > does 2.6 succeed? > > from the mach build tool: > > #!/usr/bin/env python > # This Source Code Form is subject to the terms of the Mozilla Public > # License, v. 2.0. If a copy of the MPL was not distributed with this > # file, You can obtain one at http://mozilla.org/MPL/2.0/. > > from __future__ import print_function, unicode_literals > > import os > import platform > import sys > > # Ensure we are running Python 2.7+. We put this check here so we generate a > # user-friendly error message rather than a cryptic stack trace on module > # import. > if sys.version_info[0] == 2 and sys.version_info[1] < 7: > print('Python 2.7 or above is required to run mach.') > print('You are running', platform.python_version()) > sys.exit(1) Are you sure that is used? As a test, I did a fresh install of CentOS 5 i386, installed epel-release and rpmforge-release from <http://www.mirrorservice.org/sites/dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm> and <http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.2-2.el5.rf.i386.rpm> Then did: yum groupinstall development-tools development-libs x-software-development gnome-software-development yum install gcc44 gcc44-c++ python26 yasm-devel Unpacked the firefox 18.0.1 source code, created the mozconfig file and ran 'make -f client.mk' And it built fine ... James Pearson