- | -amigados* | -msdos* | -newsos* | -unicos* | -aos* \
- | -nindy* | -vxworks* | -ebmon* | -hms* | -mvs* | -clix* \
- | -riscos* | -linux* | -uniplus* | -iris* | -rtu* | -xenix* \
- | -hiux* | -386bsd* | -netbsd* | -freebsd* | -riscix* \
- | -lynxos* | -bosx* | -nextstep* | -cxux* | -aout* | -elf* \
- | -ptx* \
- | -go32 | -vsta | -sim | -es1800* | -udi | -hms* | -xray | -hds* \
- | -os68k* | -none* | -v88r* | -coff \
- | -abug | -ecoff* | -netware* | -proelf | -os9* )
- # The last three lines above are CYGNUS LOCAL
+ | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
+ | -aos* \
+ | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
+ | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
+ | -hiux* | -386bsd* | -netbsd* | -openbsd* | -freebsd* | -riscix* \
+ | -lynxos* | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
+ | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
+ | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
+ | -cygwin* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
+ | -mingw32* | -linux-gnu* | -uxpv* | -beos* | -mpeix* | -udk* \
+ | -interix* | -uwin* | -rhapsody* | -openstep* | -oskit*)
+ # Remember, each alternative MUST END IN *, to match a version number.
+ ;;
+ -sim | -es1800* | -hms* | -xray | -os68k* | -none* | -v88r* \
+ | -windows* | -osx | -abug | -netware* | -os9* | -beos* \
+ | -macos* | -mpw* | -magic* | -mon960* | -lnews*)
+ ;;
+ -mac*)
+ os=`echo $os | sed -e 's|mac|macos|'`
+ ;;
+ -linux*)
+ os=`echo $os | sed -e 's|linux|linux-gnu|'`