在Linux 2.6驱动程序模块Makefile中创建调试目标 [英] Creating a debug target in Linux 2.6 driver module makefile

问题描述

我试图在命令行上执行"make debug"，它将使用-DDEBUG_OUTPUT定义构建我的驱动程序模块，这将导致某些代码段被编译.

I'm trying to be able to execute "make debug" at the command line and it will build my driver module with the -DDEBUG_OUTPUT define, which will cause certain sections of code to be compiled in.

在2.4内核makefile中，这非常容易.我只是创建一个debug:目标，并在该目标的cc编译命令参数中包括"-DDEBUG_OUTPUT".容易.

In 2.4 kernel makefiles, this is pretty easy. I just create a debug: target and included "-DDEBUG_OUTPUT" in the cc compilation command arguments for that target. Easy.

不幸的是(对我而言)，2.6彻底改变了模块的编译方式，我似乎只能找到琐碎的全部"和干净"示例，这些示例并未显示在编译时添加自定义定义.

Unfortunately (for me), 2.6 completely changed how modules are compiled, and I can ONLY seem to find the trivial "all" and "clean" examples, which don't show adding custom defines at compilation time.

我尝试过:

  debug:
    make -C $(KERNEL_DIR) SUBDIRS='pwd' -DDEBUG_OUTPUT modules

并收到来自make的投诉.

and got a complaint from make.

我也尝试过:

.PHONY:调试

debug:
  make -C $(KERNEL_DIR) SUBDIRS='pwd' EXTRA_CFLAGS="$(EXTRA_CFLAGS) -DDEBUG_OUTPUT" modules

，但看不到EXTRA_CFLAGS包含的内容.从命令行输出中可以看到，它确实将-D正确地附加到了现有EXTRA_CFLAGS上，该EXTRA_CFLAGS包括-I代表include dir.但是，驱动程序文件现在无法编译，因为无法找到包含目录...因此以某种方式无法看到EXTRA_CFLAGS包含的内容.

but it is not seeing what EXTRA_CFLAGS contains. I can see from the command line output that it does correctly append the -D onto the existing EXTRA_CFLAGS, which includes the -I for includes dir. However, the driver file won't compile now because it cannot find the includes dir...so somehow it is not seeing what EXTRA_CFLAGS contains.

推荐答案

-D"选项不是要传递给make的:它是C预处理程序(cpp)选项.

A "-D" option is not meant to be passed to make: it is a C preprocesseor (cpp) option.

要为您的构建定义DEBUG_OUTPUT，您必须将以下行添加到您的Kbuild文件中:

To define DEBUG_OUTPUT for your build you have to add the following line to your Kbuild file:

EXTRA_CFLAGS = -DDEBUG_OUTPUT

此后，您可以像往常一样拨打电话:

Afterwards you can call, as usual:

make -C $(KERNEL_DIR) M=`pwd`

如果您不想编辑Kbuild文件，则可以有一个如下的调试目标:

If you don't want to edit the Kbuild file, you can have a debug target like this:

INCLUDES="-Imy_include_dir1 -Imy_include_dir2"

.PHONY: debug
debug:
        $(MAKE) -C $(KDIR) M=`pwd` EXTRA_CFLAGS="$(INCLUDES) -DDEBUG_OUTPUT"

EDIT#2:

MY_CFLAGS=-DFOO -DBAR -Imydir1

all:
        $(MAKE) -C $(KDIR) M=`pwd` EXTRA_CFLAGS="$(MY_CFLAGS)"

debug: MY_CFLAGS+=-DDEBUG_OUTPUT
debug:
        $(MAKE) -C $(KDIR) M=`pwd` EXTRA_CFLAGS="$(MY_CFLAGS)"

这篇关于在Linux 2.6驱动程序模块Makefile中创建调试目标的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！