µVISION: Build Target Always Recompiles All Files

Information in this article applies to:

• µVision Version 2.04 and later

SYMPTOMS

µVision re-translates all files in my project when I'm using Project - Build target. However, I have made no changes to my files and the the µVision built-in MAKE should check the timestamp to see that there are no changes.

CAUSE

µVision uses file dependency information that is stored in the object files by the compiler, assembler, and linker. To create a standard time that is valid worldwide, the toolchain uses the time zone setting of your computer. However, this timezone setting must be consistently used by your computer.

Windows 32-bit command line programs (this is the compiler and linker) use the environment variable TZ to determine the time zone where you are located. This environment variable is not used by the Windows application µVision. If the TZ definition of the time zone is not the same as the setting under My Computer - Control Panel - Date/Time / Time Zone, then µVision thinks that the creation time has changed and re-translates the file.

RESOLUTION

Check to see if you have an environment variable named TZ. It is best to remove this environment variable completely. If you have concerns that other programs will not work without this environment variable, make the setting consistent with the selection under My Computer - Control Panel - Date/Time / Time Zone.

SEE ALSO

• µVision: Build Target Rebuilds all Files when TZ is Set
• µVision: Build Option Rebuilds All Target Files

Last Reviewed: Monday, December 14, 2020