These are default options defined inside isc.cf. You can redefine them inside host.def.
/* Disable the use of /var/X11 */ #ifndef HasVarDirectory #define HasVarDirectory NO #endif /* Use mmap Driver */ #ifndef HasSVR3mmapDrv # define HasSVR3mmapDrv YES #endif /* Use inline Math from linux ;-) package inline-math-2.6.tar.gz */ /* should be available on your favorite linux ftp */ #ifndef UseInlineMath # define UseInlineMath YES #endif /* Use cbrt from liboptm.a (Interactive icc Compiler) */ #ifndef HasCbrt # define HasCbrt YES #endif /* Use GNUs MallocLibrary (and the Location for the Lib) */ #ifndef UseGnuMalloc # define UseGnuMalloc YES #endif /* Install Zlib Headers - used in lib/zlib/Imakefile */ #ifndef OsNeedZlibHeaders # define OsNeedZlibHeaders YES #endif /* Expand Manual Pages (needs S5L) */ #ifndef ExpandManNames # define ExpandManNames YES #endif /* if you have groff or the TextProcessingWorkbench - don't preformat*/ #ifndef FormattedManPages # define FormattedManPages NO #endif #ifndef HasSgmlFmt /* HasLinuxDoc */ # define HasSgmlFmt YES #endif /* XF86Setup Util */ #ifndef HasTk #define HasTk YES #define HasTcl YES #endif #ifndef HasPosixRegex /* Need extra/regex since 3.9Ns */ #define HasPosixRegex NO #endif #ifndef DoLoadableServer #define DoLoadableServer YES #endif #ifndef CpuOption #define CpuOption -mpentium #endif