mirror of https://github.com/proski/madwifi
Port elements of the build system from ndiswrapper
This eliminates compilation to find the kernel version. The new Makefile provides more sanity checks and more verbose reporting.
This commit is contained in:
Pavel Roskin
parent
19e85c5f13
commit
e1a1d8f94f
73
Makefile.inc
73
Makefile.inc
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@ -49,47 +49,50 @@ endif
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# DESTDIR is used as path prefix during installation.
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DESTDIR ?=
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# KERNELPATH is the path to the Linux kernel build tree. Unless a
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# separate build directory was used for the kernel build, it's the same
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# as the kernel source tree. KERNELPATH is used to access the kernel
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# configuration, include files and the build system. To build for
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# another kernel, set KERNELPATH manually, for example with:
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# make KERNELPATH=/path/to/kernel/source
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# By default, we try to compile the modules for the currently running
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# kernel. But it's the first approximation, as we will re-read the
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# version from the kernel sources.
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KVERS_UNAME ?= $(shell uname -r)
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# The default KERNELPATH points to the directory where the currently
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# running kernel was compiled. Note that the configuration and the
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# version of the kernel tree might have changed since then.
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ifeq ($(wildcard $(KERNELPATH)),)
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KERNELPATH = /lib/modules/$(shell uname -r)/build
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# sanity check: does KERNELPATH exist?
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ifeq ($(shell cd $(KERNELPATH) && pwd),)
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$(error $(KERNELPATH) is missing, please set KERNELPATH)
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endif
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export KERNELPATH
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# KERNELPATH is the path to the Linux kernel build tree. It is usually the
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# same as the kernel source tree, except when the kernel was compiled in
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# a separate directory.
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KERNELPATH ?= $(shell readlink -f /lib/modules/$(KVERS_UNAME)/build)
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ifeq (,$(KERNELPATH))
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$(error Kernel build tree not found - please set KERNELPATH to configured kernel)
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endif
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# KERNELRELEASE is the target kernel's version. It's always taken from
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# the kernel build tree. Kernel Makefile doesn't always know the exact
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# kernel version (especially for vendor stock kernels), so we get it
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# from <linux/version.h> instead. But simply grepping it from version.h
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# doesn't work, since some distributions have multiple UTS_RELEASE
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# in that file.
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# This trick has been inspired by the lm_sensors project.
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ifndef KERNELRELEASE
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KERNELRELEASE := $(shell $(CC) -I $(KERNELPATH)/include -E $(TOP)/kernelversion.c | grep uts_release | cut -f2 -d'"')
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KERNELCONF := $(KERNELPATH)/.config
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ifeq (,$(wildcard $(KERNELCONF)))
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$(error No .config found in $(KERNELPATH), please set KERNELPATH to configured kernel)
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endif
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ifneq (,$(wildcard $(KERNELPATH)/include/linux/version.h))
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ifneq (,$(wildcard $(KERNELPATH)/include/generated/uapi/linux/version.h))
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$(error Multiple copies of version.h found, please clean your build tree)
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endif
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endif
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# Kernel Makefile doesn't always know the exact kernel version, so we
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# get it from the kernel headers instead and pass it to make.
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VERSION_H := $(KERNELPATH)/include/generated/utsrelease.h
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ifeq (,$(wildcard $(VERSION_H)))
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VERSION_H := $(KERNELPATH)/include/linux/utsrelease.h
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endif
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ifeq (,$(wildcard $(VERSION_H)))
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VERSION_H := $(KERNELPATH)/include/linux/version.h
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endif
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ifeq (,$(wildcard $(VERSION_H)))
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$(error Please run 'make modules_prepare' in $(KERNELPATH))
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endif
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KERNELRELEASE := $(shell sed -ne 's/"//g;s/^\#define UTS_RELEASE //p' $(VERSION_H))
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ifeq (,$(KERNELRELEASE))
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$(error Cannot detect kernel version - please check compiler and KERNELPATH)
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endif
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$(error Cannot find UTS_RELEASE in $(VERSION_H), please report)
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endif
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# KERNELCONF is the name of the file that holds the configuration
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# of the target kernel.
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KERNELCONF ?= $(KERNELPATH)/.config
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# sanity check: does KERNELCONF exist?
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ifeq ($(wildcard $(KERNELCONF)),)
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$(error KERNELCONF: $(KERNELCONF) does not exist.)
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endif
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include $(KERNELCONF)
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# KMODPATH nominates the directory where the modules will be
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@ -1,21 +0,0 @@
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/* This file is used for a trick to determine the version of the kernel
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* build tree. Simply grepping <linux/version.h> doesn't work, since
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* some distributions have multiple UTS_RELEASE definitions in that
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* file.
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* Taken from the lm_sensors project.
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*
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* $Id$
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*/
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#include <linux/version.h>
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#ifndef UTS_RELEASE
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)
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/* Linux 2.6.33+ uses <generated/utsrelease.h> */
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#include <generated/utsrelease.h>
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#else
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/* Linux 2.6.18 - 2.6.32 uses <linux/utsrelease.h> */
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#include <linux/utsrelease.h>
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#endif
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#endif
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char *uts_release = UTS_RELEASE;
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