Request for help: how do teach module building about kernel options?

[Warner Losh]

On Jan 3, 2012, at 12:06 PM, Adrian Chadd wrote:

> On 3 January 2012 10:56, Warner Losh <imp at bsdimp.com> wrote:
> 
>>> So how about we do up say, the KERNOPTS field first, which would be a
>>> big win. Then KERNDEVICES too, if that's possible?
>> 
>> I'd only planned on doing KERNOPTS :)
> 
> KERNOPTS would be fine for now. That at least gets me out of my
> initial issues with wlan/ath building and the fun in handling options.

Please find enclosed a proposed patch.  This will not build, of course, since there's no file in the tree mesh_baby.c, so if you have IEEE80211_SUPPORT_MESH defined, it won't work.  It keys off the actual define.

It even works with devices (which define DEV_xxx), but only if you have it in the options file like isa (eg, you need to tell config to generate it).

Comments?

Warner

Index: conf/kmod.mk
===================================================================
--- conf/kmod.mk        (revision 229436)
+++ conf/kmod.mk        (working copy)
@@ -324,7 +324,16 @@
 ${_src}:
        ln -sf ${KERNBUILDDIR}/${_src} ${.TARGET}
 .endif
+.if exists(${KERNBUILDDIR}/${_src})
+_opts!=cut -d' ' -f 2 ${KERNBUILDDIR}/${_src}
+.for _o in ${_opts}
+KERNOPT_${_o}=1
+.if defined(SRCS_${_o})
+SRCS+=${SRCS_${_o}}
+.endif
 .endfor
+.endif
+.endfor
 .else
 .for _src in ${SRCS:Mopt_*.h}
 CLEANFILES+=   ${_src}
Index: modules/ath/Makefile
===================================================================
--- modules/ath/Makefile        (revision 229436)
+++ modules/ath/Makefile        (working copy)
@@ -41,6 +41,7 @@
 SRCS+= ah_osdep.c ah.c ah_regdomain.c ah_eeprom_v3.c
 SRCS+= device_if.h bus_if.h pci_if.h opt_inet.h opt_ath.h opt_ah.h opt_wlan.h
 
+SRCS_IEEE80211_SUPPORT_MESH=mesh_baby.c
 #
 # AR5210 support; these are first generation 11a-only devices.
 #