This environment variable determines the path for the toolvars.pl initialization file, with which the Perl scripts of the development environment are initialized. The system default is $TOOL/bin.
toolvars.pl contains platform-specific adjustments, such as the platform-specific compiler, link, and other programs, as well as the associated options. Certain additional environment variables that are required for the MAKE process are also initialized in this file.
C:\develop\DevTool\bin\toolvars.pl