Steps to reproduce:

• use a Linker command file that contains umlauts like öäü
• save it as with this encoding: cp1252
• run a build with jenkins
• now you'll see that jenkins will fail, because it opens the command file as utf-8 and will fail to decode the umlauts

Background:
Texas Instruments C6000 Code generation tools Version 6.1.x can't even use utf-8 encoded linker command files, the linker will fail.

Possible solutions:

• add some magic to determine the command file encoding
• let the user define the encoding
• use the systems default encoding ( java:Charset.defaultCharset() )
• try utf-8 and ascii (attached patch, low quality, just as a idea)