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possible bug in xm-cygwin.h


xm-cygwin.h has 

/* We support both "/" and "\" since everybody tests both but we
   default to "/".  This is important because if gcc produces Win32
   paths containing backslashes, make and configure may treat the
   backslashes as escape characters.  Many Win32 programs use forward
   slashes so using a forward slash shouldn't be problematic from the
   perspective of wanting gcc to produce native Win32 paths. */
#define DIR_SEPARATOR '/'

This is shaky logic: not everyone does test backslash as a path
separator, e.g. base_name() in cccp.c.

zw