[Mingw-msys] Batch File Startup

[MEA-MikeFriedrichs <mfr...@ma...>]

Hello,

I just downloaded MSYS, release 1.0.9 onto my WIN2k machine. I am building 
some HC12 code and it has been recommended to use MSYS to interface with 
the tools.

In directory f:/msys.  The startup batch file(msys.bat) has some commands I 
don't understand.



Excerpt are as follows:
rem Revision:       2.0
rem Revision Date:  April 17th, 2002

if "x%COMSPEC%" == "x" set COMSPEC=command.com
start %COMSPEC% /e:4096 /c %0 GOTO: _Resume %0 %1 %2 %3 %4 %5 %6 %7 %8 %9
goto EOF

What does the 'x' imply that prefixes the environmental variable?




Mike Friedrichs
Machine Element Analysis
15865 Hwy 105 West; Ste.5
Montgomery, Texas 77356
ph: 936.588.3834
fax: 800.210.9586