I've seen this happen in the nv and cirrus folders so far. Looks like what
happens is that only .so modules get built (and not the .a or .o files).
Not a problem if just building the server, however the sdk portion only looks
for the .o


install -c -m 0444 lg_xaa.h /usr/X11R6/lib/Server/drivers/cirrus
install -c cirrus_drv.so /usr/X11R6/lib/Server/modules/drivers
make[6]: *** No rule to make target `cirrus_alpine.o', needed by `install.sdk'.
 Stop.

From the cirrus Imakefile:
                                                                               
                                                                               
     
#if !DoLoadableServer
ObjectModuleTarget(cirrus,$(COBJS) $(AOBJS) $(LOBJS))
#else
ObjectModuleTarget(cirrus,$(COBJS))
#endif
...
InstallDriverSDKNonExecFile(lg_xaa.h,$(DRIVERSDKDIR)/drivers/cirrus)
                                                                               
                                                                               
     InstallDriverSDKObjectModule(cirrus,$(DRIVERSDKMODULEDIR),drivers)
InstallDriverSDKObjectSubModule(cirrus_alpine,$(DRIVERSDKMODULEDIR),drivers)
InstallDriverSDKObjectSubModule(cirrus_laguna,$(DRIVERSDKMODULEDIR),drivers)


Bottom line is dlloader and sdk aren't quite peacefully coexisting, though it
shouldn't take more than a few Imakefile edits (or maybe make the SDK logic
pull in the proper module dependancies?)