kgidrv

Compilation rules are very basic. For each platform, rules are defined commonly in rules.mak and in <platform>.mak (say Linux.mak or FreeBSD.mak) for specific definitions of each.

Typically, for Linux:

KERNEL_PATH?=/lib/modules/$(shell uname -r)/build

CFLAGS=-Wall -fomit-frame-pointer -O2 -D__KERNEL__ -D__MODULE__ -ffreestanding \
    -include ${KERNEL_PATH}/include/kgi/config.h -I${KERNEL_PATH}/include -Iinclude -I. \
    -fno-strict-aliasing

LDFLAGS=-melf_i386 -r --strip-debug -O2

SYSTEM=Linux

OBJS+=system/$(SYSTEM)/kgim-0.9.ko

AWK?=awk

%.ko: %.o
        $(LD) $(LDFLAGS) -o $@ $^

%.ko: %-board.o
        $(LD) $(LDFLAGS) -o $@ $^

%.ko: %-monitor.o
        $(LD) $(LDFLAGS) -o $@ $^

And for FreeBSD:

KERNEL_PATH?=/usr/src/sys

SYSTEM=FreeBSD
ARCH=i386

OBJS+=machine @ device_if.h bus_if.h pci_if.h
OBJS+=system/$(SYSTEM)/kgim-0.9.ko

CLEANFILES=

CFLAGS=       ${COPTS} -D_KERNEL -DKLD_MODULE

CFLAGS+= -finline-limit=15000 -fno-common -g -mno-align-long-strings \
       -mpreferred-stack-boundary=2 -ffreestanding -std=c99 -Wstrict-prototypes \
       -Wmissing-prototypes -O -pipe -mcpu=pentiumpro

CFLAGS+= -I. -I${KERNEL_PATH} -Iinclude -I${KERNEL_PATH}/dev

CFLAGS+= ${DEBUG_FLAGS}

LDFLAGS+= -r -d -warn-common

AWK?=awk

machine:
      ln -s ${KERNEL_PATH}/${ARCH}/include machine

@:
      ln -s ${KERNEL_PATH} @

device_if.h: @/kern/device_if.m
      ${AWK} -f @/tools/makeobjops.awk $^ -h
bus_if.h: @/kern/bus_if.m
      ${AWK} -f @/tools/makeobjops.awk $^ -h
pci_if.h: @/dev/pci/pci_if.m
      ${AWK} -f @/tools/makeobjops.awk $^ -h

%.ko: %.o
      $(LD) -Bshareable -d -warn-common -o $@ $^

%.ko: %-board.o
      $(LD) -Bshareable -d -warn-common -o $@ $^

%.ko: %-monitor.o
      $(LD) -Bshareable -d -warn-common -o $@ $^

The modules to compile and their content if configured by the ./configure script. This script includes config.local, a set of shell functions responsible for the generation of the Makefile given the content of ./configure.

Typically to compile a Radeon board under kgidrv, you need the following ./configure file:

#!/bin/sh
. config.local

init

clock bind ATI RADEON
clock spec IBM VGA

ramdac ATI RADEON
ramdac IBM VGA

chipset ATI RADEON
chipset IBM VGA "chipset/IBM/VGA-text-meta.o"

board ATI Radeon

monitor spec Standard crt SVGA
monitor bind crt "monitor/crt/VESA-timings.o monitor/crt/VGA-timings.o
   monitor/crt/fixed.o monitor/crt/gtf.o monitor/crt/DDC.o monitor/crt/I2C.o"

fini

The IBM stuff is necessary for compatibility reasons: some code of these submodules are systematically used by other drivers. You may add as many drivers you need in ./configure to compile even all the drivers in one pass if you want.