Enabled Gnu warning suppression macros for GCC on Mac OS X.
Reformatted code for independence of tab stop setting.
Removed CYGWIN environment header file.
Improved portability on Cygwin and DJGPP.
Cleaned up defines.
Fixed portability problems discovered on Win32.
Made available string comparison routines which guaranteed upper-case…
Moved non-configure-script environment configurations into separate f…
Removed test of obsolete macro.
Updated copyright dates.
Changed stricmp() to strcasecmp().
Portability fix for Mingw32 compiler.
Made code compilable by a C++ compiler.
OS/2 portability patches supplied by Alexander Mai.
Fixes for VMS.