Running Build.PL
Checking for GSL using gsl-config
'gsl-config' is not recognized as an internal or external command,
operable program or batch file.
'gsl-config' is not recognized as an internal or external command,
operable program or batch file.
'gsl-config' is not recognized as an internal or external command,
operable program or batch file.
'gsl-config' is not recognized as an internal or external command,
operable program or batch file.