texlive-latex-ifplatform 51265 Conditionals to test which platform is being used
This package uses the (La)TeX extension
-shell-escape to establish whether the document is being processed on a Windows or on a Unix-like system, or on Cygwin (Unix environment over a Windows system). Booleans provided are:
\ifcygwin. The package also preserves the output of
uname on a Unix-like system, which may be used to distinguish between various classes of systems.