made the pack completely portable and wrote relevent bat files to go with it

gitportable/usr/share/vim/vim91/compiler/irix5_cpp.vim

@@ -0,0 +1,23 @@
+" Vim compiler file
+" Compiler:	SGI IRIX 5.3 CC or NCC
+" Maintainer:	David Harrison <david_jr@users.sourceforge.net>
+" Last Change:	2012 Apr 30
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
+
+if exists("current_compiler")
+  finish
+endif
+let current_compiler = "irix5_cpp"
+let s:keepcpo= &cpo
+set cpo&vim
+
+CompilerSet errorformat=%E\"%f\"\\,\ line\ %l:\ error(%n):\ ,
+		    \%E\"%f\"\\,\ line\ %l:\ error(%n):\ %m,
+		    \%W\"%f\"\\,\ line\ %l:\ warning(%n):\ %m,
+		    \%+IC++\ prelinker:\ %m,
+		      \%-Z\ \ %p%^,
+		      \%+C\ %\\{10}%.%#,
+		      \%-G%.%#
+
+let &cpo = s:keepcpo
+unlet s:keepcpo