Downloading Sourcery G++ for ARM uClinux 4.3 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. Sourcery G++ for ARM uClinux is included in Development Tools.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The following version: 4.3 is the most frequently downloaded one by the program users. This software is a product of CodeSourcery.
From the developer:
Version numbers shown for open-source components indicate the versions used as the basis for Sourcery CodeBench for ARM uClinux. Mentor Graphics makes extensive enhancements to the base versions, adding support for more CPUs, improving code-generation, and addressing defects found through its validation process.
You may want to check out more software, such as Sourcery CodeBench for ARM Embedded, ARM RVDS or GNU Tools for ARM Embedded Processors, which might be related to Sourcery G++ for ARM uClinux.