Question

但当我把媒体/V4l2-dev.h(因为我想访问VFL_TYPE_GRABER等宏)包括在内时,我的第一个基本尝试失败了。

h 包括 linux/iopport.h 用此输出碰撞的 :

In file included from /usr/src/linux/include/linux/device.h:16,
                 from /usr/src/linux/include/media/v4l2-dev.h:14,
                 from driv.c:11:
/usr/src/linux/include/linux/ioport.h:19: error: expected specifier-qualifier-list         before ‘resource_size_t’
/usr/src/linux/include/linux/ioport.h:116: error: expected declaration specifiers or ‘...’ before ‘resource_size_t’
/usr/src/linux/include/linux/ioport.h:116: error: expected declaration specifiers or ‘...’ before ‘resource_size_t’
/usr/src/linux/include/linux/ioport.h:121: error: expected declaration specifiers or ‘...’ before ‘resource_size_t’

[.]

来源:

#include <asm/types.h>
#include <linux/videodev2.h>

#include <media/v4l2-dev.h>

int main(int argc, char **argv) {
    return 0;
}

我编译了:

gcc -I/usr/src/linux/arch/x86/include -I/usr/src/linux/include -o prog prog.c

It occurs on 2.6.32-37-generic-pae with gcc 4.4.3 glibc 2.10 I tried the same on a gentoo with approximative equivalent version of kernel-headers and gcc.

我做错什么了?

编辑: 指定准确包含路径。

Answer 1

if you are doing driver-development, you might as well use the provided frameworks to do so. i d suggest to start with an existing build-project for a driver (e.g. that one), usually a Makefile as simple as this will do:

KERNEL_VERSION := `uname -r`
KERNEL_DIR := /lib/modules/$(KERNEL_VERSION)/build

PWD := $(shell pwd)

obj-m := mymodule.o

all: mymodule
mymodule:
    @echo "Building my driver..."
    $(MAKE) -C $(KERNEL_DIR) M=$(PWD) modules
install:
    $(MAKE) -C $(KERNEL_DIR) M=$(PWD) modules_install
    depmod -ae
clean:
    rm -f *~
    rm -f Module.symvers Module.markers modules.order
    $(MAKE) -C $(KERNEL_DIR) M=$(PWD) clean

而不是试图进行包含您需要路径的二面推论。

此外,你可能不应该在需要前包括页头文件

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