Using 2.6.x kernel build system.
make: Gehe in Verzeichnis '/tmp/vmware-config0/vmmon-only'
make -C /lib/modules/2.6.20-15-generic/build/include/.. SUBDIRS=$PWD SRCROOT=$PWD/. modules
make[1]: Betrete Verzeichnis '/usr/src/linux-headers-2.6.20-15-generic'
  CC [M]  /tmp/vmware-config0/vmmon-only/linux/driver.o
In file included from /tmp/vmware-config0/vmmon-only/linux/driver.c:80:
/tmp/vmware-config0/vmmon-only/./include/compat_kernel.h:21: Fehler: expected declaration specifiers or »...« before »compat_exit«
/tmp/vmware-config0/vmmon-only/./include/compat_kernel.h:21: Fehler: expected declaration specifiers or »...« before »exit_code«
/tmp/vmware-config0/vmmon-only/./include/compat_kernel.h:21: Warnung: »int« ist Standardtyp in Deklaration von »_syscall1«
make[2]: *** [/tmp/vmware-config0/vmmon-only/linux/driver.o] Fehler 1
make[1]: *** [_module_/tmp/vmware-config0/vmmon-only] Fehler 2
make[1]: Verlasse Verzeichnis '/usr/src/linux-headers-2.6.20-15-generic'
make: *** [vmmon.ko] Fehler 2
make: Verlasse Verzeichnis '/tmp/vmware-config0/vmmon-only'
Unable to build the vmmon module.