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Accepted
Adam Sperry
Asked: 2024-01-13 06:02:12 +0800 CST

构建内核模块时无法识别的命令行选项“-ftrivial-auto-var-init=zero”

  • 772

我对内核模块开发的经验很少。尽管如此，我的任务还是维护 Sensoray 626 DAQ 卡的旧驱动程序。我正在使用一个非常简单的 dkms 设置来构建和安装驱动程序，该驱动程序已经运行良好很长时间了。该驱动程序一直在 Ubuntu 22.04 中工作，直到最近我在内核模块构建过程中遇到了以下错误，并且无法找到解决方案。任何帮助表示赞赏。如果需要其他信息，只需询问，我将使用所需信息更新问题。

注意：我知道 Comedi 有 Sensoray 626 的驱动程序。我不想使用 Comedi 驱动程序。

DKMS 构建日志：

DKMS make.log for s626-1.0.5 for kernel 6.5.0-14-generic (x86_64)
Fri Jan 12 01:17:52 PM PST 2024
make -C /lib/modules/6.5.0-14-generic/build M=/var/lib/dkms/s626/1.0.5/build SUBDIRS=/var/lib/dkms/s626/1.0.5/build
make[1]: Entering directory '/usr/src/linux-headers-6.5.0-14-generic'
warning: the compiler differs from the one used to build the kernel
  The kernel was built by: x86_64-linux-gnu-gcc-12 (Ubuntu 12.3.0-1ubuntu1~22.04) 12.3.0
  You are using:           gcc-12 (Ubuntu 12.3.0-1ubuntu1~22.04) 12.3.0
  CC [M]  /var/lib/dkms/s626/1.0.5/build/s626drv.o
gcc: error: unrecognized command-line option ‘-ftrivial-auto-var-init=zero’
make[3]: *** [scripts/Makefile.build:251: /var/lib/dkms/s626/1.0.5/build/s626drv.o] Error 1
make[2]: *** [/usr/src/linux-headers-6.5.0-14-generic/Makefile:2037: /var/lib/dkms/s626/1.0.5/build] Error 2
make[1]: *** [Makefile:234: __sub-make] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-6.5.0-14-generic'
make: *** [Makefile:29: all] Error 2
  • 发行版：Ubuntu 22.04.3 LTS
  • Linux内核版本：6.5.0-14-generic

输出apt list --installed | grep gcc

gcc-11-base/jammy-updates,jammy-security,now 11.4.0-1ubuntu1~22.04 amd64 [installed,automatic]
gcc-11/jammy-updates,jammy-security,now 11.4.0-1ubuntu1~22.04 amd64 [installed,automatic]
gcc-12-base/jammy-updates,jammy-security,now 12.3.0-1ubuntu1~22.04 amd64 [installed,automatic]
gcc-12/jammy-updates,jammy-security,now 12.3.0-1ubuntu1~22.04 amd64 [installed,automatic]
gcc/jammy,now 4:11.2.0-1ubuntu1 amd64 [installed,automatic]
libgcc-11-dev/jammy-updates,jammy-security,now 11.4.0-1ubuntu1~22.04 amd64 [installed,automatic]
libgcc-12-dev/jammy-updates,jammy-security,now 12.3.0-1ubuntu1~22.04 amd64 [installed,automatic]
libgcc-s1/jammy-updates,jammy-security,now 12.3.0-1ubuntu1~22.04 amd64 [installed,automatic]

Makefile（请注意，此 makefile 具有除内核模块之外的其他内容的配方，并且该CC变量不用于构建内核模块）：

###############################################################################
# for kernel modeule level driver:

# Kernel directory
KDIR        := /lib/modules/$(shell uname -r)/build
# Module directory
MODDIR      := /lib/modules/$(shell uname -r)/kernel/drivers/sensoray

# System values
PWD     := $(shell pwd)
KERNEL_24   := $(if $(wildcard $(KDIR)/Rules.make),1,0)

# Target file
obj-m       := s626.o


# Source files
ifeq    ($(KERNEL_24),0) # > 2.4
s626-objs   := s626drv.o 
else # <= 2.4
s626-objs   := s626drv.o
endif

.PHONY:     all clean modules_install

ifeq    ($(KERNEL_24),0) # > 2.4
ifeq    ($(KERNELRELEASE),)
all:
        $(MAKE) -C $(KDIR) M=$(PWD) SUBDIRS=$(PWD)
clean modules_install:
        $(MAKE) -C $(KDIR) M=$(PWD) SUBDIRS=$(PWD) $@
endif   # KERNELRELEASE

else    # <= 2.4

ifneq   ($(KERNELRELEASE),)

include $(KDIR)/Rules.make

s626.o: $(s626-objs)
        $(Q)$(LD) $(LD_RFLAG) -r -o $@ $(s626-objs)
else

all:
        $(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
clean:
        rm -f *.ko *.o .*.cmd .*.o.flags *.mod.c

endif   # KERNELRELEASE

endif   # KERNEL_24

ifeq    ($(KERNEL_24),1) # <= 2.4

install:        s626.o
    @if [ -d /lib/modules/$(shell uname -r)/kernel/drivers/sensoray/ ];\
    then rm -f /lib/modules/$(shell uname -r)/kernel/drivers/sensoray/s626.*;\
    fi
    @if [ -d /lib/modules/$(shell uname -r)/extra/ ];\
    then rm -f /lib/modules/$(shell uname -r)/extra/s626.*;\
    fi
    su -c "set -x;./MAKEDEV;mkdir -p $(MODDIR);cp -v s626.o $(MODDIR);depmod -a"

else
install:        s626.ko
    @if [ -d /lib/modules/$(shell uname -r)/kernel/drivers/sensoray/ ];\
    then rm -f /lib/modules/$(shell uname -r)/kernel/drivers/sensoray/s626.*; \
    fi
    @if [ -d /lib/modules/$(shell uname -r)/extra/ ];\
    then rm -f /lib/modules/$(shell uname -r)/extra/s626.*;\
    fi
    @if [ -d /lib/modules/$(shell uname -r)/kernel/drivers/staging/comedi/drivers ];\
    then rm -f /lib/modules/$(shell uname -r)/kernel/drivers/staging/comedi/drivers/s626.*;\
    fi
    su -c "set -x;./MAKEDEV;mkdir -p $(MODDIR);cp -v s626.ko $(MODDIR);install -m 444 s626.ko $(MODDIR);depmod -a"
endif  # KERNEL > 2.4


###############################################################################
# for library and application level:
SRC=            # module source tree
CC=         # compiler
AR=         # library manager

# source path
ifeq ($(strip $(SRC)),)
    SRC=.
endif

# the compiler
ifeq ($(strip $(CC)),)
    CC=gcc
endif

# the library manager
ifeq ($(strip $(AR)),)
    AR=ar
endif

# build the distribution's library
lib:        libs626.a
libs626.a:  s626core.o s626mod.o
        $(AR) cr libs626.a $(SRC)/s626core.o $(SRC)/s626mod.o

# compile the 626 universal core
core:       s626core.o
s626core.o: $(SRC)/s626core.c $(SRC)/s626core.h $(SRC)/s626mod.h
        $(CC) $(CFLAGS) -c $(SRC)/s626core.c

# build the 626 OS-dependent module
mod:        s626mod.o
s626mod.o:  $(SRC)/s626mod.c $(SRC)/s626core.h $(SRC)/s626mod.h $(SRC)/s626drv.h $(SRC)/s626.h $(SRC)/s626api.h
        $(CC) $(CFLAGS) -c $(SRC)/s626mod.c

# build the distribution's library (you may need to install gcc-multilib package)
lib32:      libs626-32.a
libs626-32.a:   s626core-32.o s626mod-32.o
        $(AR) cr libs626-32.a $(SRC)/s626core-32.o $(SRC)/s626mod-32.o

# compile the 626 universal core
s626core-32.o:  $(SRC)/s626core.c $(SRC)/s626core.h $(SRC)/s626mod.h
        $(CC) $(CFLAGS) -m32 -c $(SRC)/s626core.c -o $@

# build the 626 OS-dependent module
s626mod-32.o:   $(SRC)/s626mod.c $(SRC)/s626core.h $(SRC)/s626mod.h $(SRC)/s626drv.h $(SRC)/s626.h $(SRC)/s626api.h
        $(CC) $(CFLAGS) -m32 -c $(SRC)/s626mod.c -o $@

#----------------------------------------------------------------
# Demonstration programs
# type "make demo" to compile, link, and create demo application
demo:       libs626.a s626demo.o s626dm2b.o
        $(CC) -o s626demo s626demo.o -L$(SRC) -ls626 -lpthread
        $(CC) -o s626dm2b s626dm2b.o -L$(SRC) -ls626 -lpthread

s626demo.o: $(SRC)/s626demo.c $(SRC)/s626core.h $(SRC)/s626mod.h $(SRC)/s626drv.h $(SRC)/s626api.h $(SRC)/App626.h
        $(CC) $(CFLAGS) -c $(SRC)/s626demo.c

s626dm2b.o: $(SRC)/s626dm2b.c $(SRC)/s626core.h $(SRC)/s626mod.h $(SRC)/s626drv.h $(SRC)/s626api.h $(SRC)/App626.h
        $(CC) $(CFLAGS) -c $(SRC)/s626dm2b.c

demo32:     libs626-32.a s626demo-32.o s626dm2b-32.o
        $(CC) -m32 -o s626demo-32 s626demo-32.o -L$(SRC) -ls626-32 -lpthread
        $(CC) -m32 -o s626dm2b-32 s626dm2b-32.o -L$(SRC) -ls626-32 -lpthread

s626demo-32.o:  $(SRC)/s626demo.c $(SRC)/s626core.h $(SRC)/s626mod.h $(SRC)/s626drv.h $(SRC)/s626api.h $(SRC)/App626.h
        $(CC) $(CFLAGS) -m32 -c $(SRC)/s626demo.c -o $@

s626dm2b-32.o:  $(SRC)/s626dm2b.c $(SRC)/s626core.h $(SRC)/s626mod.h $(SRC)/s626drv.h $(SRC)/s626api.h $(SRC)/App626.h
        $(CC) $(CFLAGS) -m32 -c $(SRC)/s626dm2b.c -o $@


# for debugging:
#     gcc -g -o s626demo s626core.c s626mod.c s626demo.c -lpthread
#     gcc -g -o s626dm2b s626core.c s626mod.c s626dm2b.c -lpthread

clnall:
        rm -f *.ko *.o .*.cmd .*.o.flags *.mod.c libs626*.a s626demo s626dm2b *.tar.gz s626*-32 Module.symvers modules.order


###############################################################################
# for internal develoment only
#----------------------------------------------------------------
# select files for the distribution tarball
T =  $(SRC)/README
T += $(SRC)/COPYING
T += $(SRC)/MAKEDEV
T += $(SRC)/Modules.conf
T += $(SRC)/Makefile
T += $(SRC)/s626drv.h
T += $(SRC)/s626drv.c
T += $(SRC)/s626.h
T += $(SRC)/s626mod.h
T += $(SRC)/s626mod.c
T += $(SRC)/s626core.h
T += $(SRC)/s626core.c
T += $(SRC)/s626api.h
T += $(SRC)/App626.h
T += $(SRC)/libs626.a
T += $(SRC)/s626demo.c
T += $(SRC)/s626dm2b.c

#----------------------------------------------------------------
# build distribution tarball (only for development)
tar:
#       tar -Pzcf s626-0.3.tar.gz $(T)
        tar -czvf s626-1.0.tar.gz $(T)

DKMS配置文件：

MAKE="'make' KDIR=/lib/modules/${kernelver}/build"
CLEAN="'make' clean"
BUILT_MODULE_NAME=s626
BUILT_MODULE_LOCATION=./
DEST_MODULE_LOCATION=/kernel/drivers/sensoray/
PACKAGE_NAME=s626
PACKAGE_VERSION=1.0.5
AUTOINSTALL=yes
REMAKE_INITRD=yes
kernel-modules

2 个回答

  1. Best Answer

    问题似乎在于 Makefile（由原始开发人员编写）设置了CCmake 变量，从而阻止了 DKMS 使用环境变量正确覆盖编译器CC。此错误报告描述了此潜在问题。

    因为在我的例子中，Makefile 仅使用CCmake 变量来构建用户级 API 库（即，它没有在用于构建模块的 Makefile 部分中使用），所以最好的解决方案是安装（到/usr/src/）一份仅包含处理内核模块的部分的 Makefile，而不是安装完整的 Makefile。

    • 0

  2. 我将符号链接更改/usr/bin/gcc为gcc-12（而不是gcc-11）

    并运行sudo /sbin/vboxconfig

    vboxdrv.sh: Stopping VirtualBox services.
vboxdrv.sh: Starting VirtualBox services.
vboxdrv.sh: Building VirtualBox kernel modules.

    （使用 Ubuntu 22.04.3 LTS、5.19.17-051917-通用内核）

    • 0

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