I created the file foo.m4 with the following contents: esyscmd(c:/cygwin/bin/date.exe)
When I run "m4 foo.m4" it generates the following error message: m4:foo.m4:1: Cannot open pipe to command `c:/cygwin/bin/date.exe': No such file or directory. The file date.exe exists on my hard drive so what gives? I have tried Windows XP and Windows Vista in conjunction with CYGWIN.
