Hi Dirk,<br>             I am trying to add driver for sn9c102 based webcams. I have included all the srource files from directory l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102 in MAKEFILE of SRC directory. In linking stage , it says that it cant find some refrences to  param_set_bool&#39; , &#39;vm_insert_page&#39; ,  &#39;vmalloc_32_user&#39; , &#39;dev_name&#39;, &#39;complete_all&#39; .<br>
<br>Should I add some static library in makefile which I have found under SRC directory of USBCAM.  Please notice that it is not giving any error in compiliation stage of diffferent object files. It gives error only in linking stage of usbcam.o  .<br>
<br>Please help me .<br><br>Thanks <br>Tapas<br><br><br><br>  ... Compiling linux/drivers/media/video/sn9c102/sn9c102_core.o<br>LD_PRELOAD=/home/tapas/11thAprilUserBuild/tool/gendep/libgendep.so GENDEP_TARGET=linux/drivers/media/video/sn9c102/sn9c102_core.o GENDEP_BINARY=cc1   gcc -m32 -c  -include linux/autoconf.h -include linux/autoconf.h    -DLINUX_VERSION_CODE=849221 -DKERN_CONT=&quot;&quot;  -D&quot;KERNEL_VERSION(a,b,c)=(((a) &lt;&lt; 16) + ((b) &lt;&lt; 8) + (c))&quot;  -DDDEUSB26_GADGET -DCONFIG_USB_GSPCA_MODULE=1 -DVID_HARDWARE_GSPCA=0xFF   -DDEBUG -D__KERNEL__ -DDDE_LINUX -DGSPCA_VERSION=\&quot;01.00.20\&quot;  -DCONFIG_VIDEO_V4L1_COMPAT  -D&quot;KBUILD_STR(s)=#s&quot; -D&quot;KBUILD_BASENAME=KBUILD_STR( sn9c102_core)&quot; -D&quot;KBUILD_MODNAME=KBUILD_STR( linux/drivers/media/video/sn9c102/sn9c102_core)&quot; -D__KERNEL__ -DDDE_LINUX -D&quot;KBUILD_STR(s)=#s&quot; -D&quot;KBUILD_BASENAME=KBUILD_STR( sn9c102_core)&quot; -D&quot;KBUILD_MODNAME=KBUILD_STR( linux/drivers/media/video/sn9c102/sn9c102_core)&quot; -DUSE_UCLIBC=y -DRAM_BASE=0x0    -DSYSTEM_x86_586_l4v2 -DARCH_x86 -DCPUTYPE_586 -DL4API_l4v2 -DCONFIG_L4_CALL_SYSCALLS -DCONFIG_L4_ABS_SYSCALLS -I/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/v4l -I/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/include -I/home/tapas/Latesttudos/l4/pkg/usb/linux26/include -I/home/tapas/11thAprilUserBuild/include/x86/l4/dde/linux26 -I/home/tapas/11thAprilUserBuild/include/l4/dde/linux26 -I/home/tapas/11thAprilUserBuild/include/l4/dde/linux26/linux-headers/asm-i386/mach-default -I/home/tapas/11thAprilUserBuild/include/x86/l4/dde/linux26/linux-headers -I/home/tapas/11thAprilUserBuild/include/l4/dde/linux26/linux-headers -I/home/tapas/11thAprilUserBuild/include/uclibc -I/home/tapas/Latesttudos/l4/pkg/usb/server/include -I/home/tapas/11thAprilUserBuild/include/x86/l4/dde/linux26 -I/home/tapas/11thAprilUserBuild/include/l4/dde/linux26 -I/home/tapas/11thAprilUserBuild/include/l4/dde/linux26/linux-headers/asm-i386/mach-default -I/home/tapas/11thAprilUserBuild/include/x86/l4/dde/linux26/linux-headers -I/home/tapas/11thAprilUserBuild/include/l4/dde/linux26/linux-headers -I/home/tapas/11thAprilUserBuild/pkg/usb/idl/OBJ-x86-l4v2 -I/home/tapas/11thAprilUserBuild/include/x86/l4v2 -I/home/tapas/11thAprilUserBuild/include/l4v2 -I/home/tapas/11thAprilUserBuild/include/x86 -I/home/tapas/11thAprilUserBuild/include -I/home/tapas/Latesttudos/l4/../dice/include -I/home/tapas/drops/include/x86/l4v2 -I/home/tapas/drops/include/l4v2 -I/home/tapas/drops/include/x86 -I/home/tapas/drops/include -nostdinc -I/usr/lib/gcc/i486-linux-gnu/4.3.2/include -I/usr/lib/gcc/i486-linux-gnu/4.3.2/include-fixed -ffunction-sections -gstabs+      -g -O2 -fno-strict-aliasing  -march=i586 -Wall -Wstrict-prototypes -fno-strict-aliasing  -Wno-unused  -Wno-pointer-sign -fno-common -fno-stack-protector /home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102_core.c -o linux/drivers/media/video/sn9c102/sn9c102_core.o<br>
In file included from /home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102.h:24,<br>                 from /home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102_core.c:41:<br>
/home/tapas/11thAprilUserBuild/include/l4/dde/linux26/linux-headers/linux/version.h:1:1: warning: &quot;LINUX_VERSION_CODE&quot; redefined<br>&lt;command-line&gt;: warning: this is the location of the previous definition<br>
In file included from /home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102.h:41,<br>                 from /home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102_core.c:41:<br>
/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/v4l/compat.h:7:1: warning: &quot;LINUX_VERSION_CODE&quot; redefined<br>In file included from /home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102.h:24,<br>
                 from /home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102_core.c:41:<br>/home/tapas/11thAprilUserBuild/include/l4/dde/linux26/linux-headers/linux/version.h:1:1: warning: this is the location of the previous definition<br>
/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102_core.c: In function ‘sn9c102_vidioc_querycap’:<br>/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102_core.c:2169: warning: implicit declaration of function ‘dev_name’<br>
/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102_core.c:2170: warning: passing argument 2 of ‘strlcpy’ makes pointer from integer without a cast<br>/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102_core.c: In function ‘sn9c102_module_exit’:<br>
/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102_core.c:3447: warning: implicit declaration of function ‘libddeusb26_deregister_driver’<br><br><br><br><br><br><br>  ==&gt; Linking usbcam<br>
LD_PRELOAD=/home/tapas/11thAprilUserBuild/tool/gendep/libgendep.so GENDEP_TARGET=usbcam GENDEP_BINARY=ld  GENDEP_BINARY_ALT1=ld ld -m elf_i386 -o usbcam /home/tapas/11thAprilUserBuild/lib/x86_586/crt0.o main.o support.o usbcam.o libv4lconvert/bayer.o libv4lconvert/jidctflt.o libv4lconvert/pac207.o libv4lconvert/spca501.o libv4lconvert/crop.o libv4lconvert/libv4lconvert.o libv4lconvert/rgbyuv.o libv4lconvert/spca561-decompress.o libv4lconvert/flip.o libv4lconvert/sn9c10x.o libv4lconvert/sq905c.o libv4lconvert/hm12.o libv4lconvert/mr97310a.o libv4lconvert/sn9c20x.o libv4lconvert/tinyjpeg.o linux/drivers/media/video/v4l2-common.o linux/drivers/media/video/v4l1-compat.o linux/drivers/media/video/v4l2-device.o linux/drivers/media/video/v4l2-ioctl.o linux/drivers/media/video/cpia.o linux/drivers/media/video/cpia_usb.o linux/drivers/media/video/gspca/gspca.o linux/drivers/media/video/gspca/spca500.o linux/drivers/media/video/gspca/spca501.o linux/drivers/media/video/gspca/spca505.o linux/drivers/media/video/gspca/spca506.o linux/drivers/media/video/gspca/spca508.o linux/drivers/media/video/gspca/spca561.o linux/drivers/media/video/gspca/zc3xx.o linux/drivers/media/video/sn9c102/sn9c102_core.o linux/drivers/media/video/sn9c102/sn9c102_hv7131d.o linux/drivers/media/video/sn9c102/sn9c102_hv7131r.o linux/drivers/media/video/sn9c102/sn9c102_mi0343.o linux/drivers/media/video/sn9c102/sn9c102_mi0360.o linux/drivers/media/video/sn9c102/sn9c102_mt9v111.o linux/drivers/media/video/sn9c102/sn9c102_ov7630.o linux/drivers/media/video/sn9c102/sn9c102_ov7660.o linux/drivers/media/video/sn9c102/sn9c102_pas106b.o linux/drivers/media/video/sn9c102/sn9c102_pas202bcb.o linux/drivers/media/video/sn9c102/sn9c102_tas5110c1b.o linux/drivers/media/video/sn9c102/sn9c102_tas5110d.o linux/drivers/media/video/sn9c102/sn9c102_tas5130d1b.o -Ttext=0x3010000 --hash-style=sysv  -L/home/tapas/11thAprilUserBuild/lib/x86_586/l4v2 -L/home/tapas/11thAprilUserBuild/lib/x86_586 -L/home/tapas/11thAprilUserBuild/lib -L/home/tapas/drops/lib/x86_586/l4v2 -L/home/tapas/drops/lib/x86_586 -L/home/tapas/drops/lib  -T/home/tapas/11thAprilUserBuild/lib/x86_586/main_stat.ld -ll4dope -lvscreen --whole-archive -lddeusb26  --no-whole-archive -lddeusb -lusb_core_client -ldde_linux26 -lddekit -lio -lomega0 -llist_alloc       -static -lgeneric_ts -ll4env -ll4rm -ldm_generic -ldm_mem -lthread -lsemaphore -llogserver_capsule -lnames -ll4util_root -ll4util -lsigma0 -lroot -ll4env -ll4env_err -ll4rm -ldm_generic -ldm_mem -lthread -lslab -ll4sys -nostdlib  -luc_c -luclibc_support -u mmap_anon -lc_be_simple_mem -lc_be_mmap -lc_be_mmap_util -lc_be_l4env_start_stop -lc_be_minimal_log_io -luc_be_simple_sleep -ll4env -llogserver_capsule -ll4rm -ldm_generic -ldm_mem -lthread -lgeneric_ts -luc_c /usr/lib/gcc/i486-linux-gnu/4.3.2/libgcc.a -luc_c -ll4sys -Ttext=0x3010000 --warn-common -gc-sections <br>
linux/drivers/media/video/sn9c102/sn9c102_core.o: In function `sn9c102_match_id&#39;:<br>/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102.h:144: undefined reference to `param_set_bool&#39;<br>
/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102.h:144: undefined reference to `param_get_bool&#39;<br>/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102.h:144: undefined reference to `vm_insert_page&#39;<br>
/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102.h:144: undefined reference to `vmalloc_32_user&#39;<br>/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102.h:144: undefined reference to `dev_name&#39;<br>
/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102.h:144: undefined reference to `complete_all&#39;<br>/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/contrib/linux/drivers/media/video/sn9c102/sn9c102.h:144: undefined reference to `complete_all&#39;<br>
make[6]: *** [usbcam] Error 1<br>make[6]: Leaving directory `/home/tapas/11thAprilUserBuild/pkg/usb/examples/usbcam/src/OBJ-x86_586-l4v2&#39;<br>make[5]: *** [/home/tapas/11thAprilUserBuild/pkg/usb/examples/usbcam/src/OBJ-x86_586-l4v2] Error 2<br>
make[5]: Leaving directory `/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam/src&#39;<br>make[4]: *** [src] Error 2<br>make[4]: Leaving directory `/home/tapas/Latesttudos/l4/pkg/usb/examples/usbcam&#39;<br>make[3]: *** [usbcam] Error 2<br>
make[3]: Leaving directory `/home/tapas/Latesttudos/l4/pkg/usb/examples&#39;<br>make[2]: *** [examples] Error 2<br>make[2]: Leaving directory `/home/tapas/Latesttudos/l4/pkg/usb&#39;<br>make[1]: *** [usb.bin] Error 2<br>make[1]: Leaving directory `/home/tapas/Latesttudos/l4/pkg&#39;<br>
root@tapas-laptop:/home/tapas/Latesttudos/l4# <br><br><br><div class="gmail_quote">On Tue, Apr 14, 2009 at 2:04 PM, Dirk Vogt <span dir="ltr">&lt;<a href="mailto:dvogt@os.inf.tu-dresden.de">dvogt@os.inf.tu-dresden.de</a>&gt;</span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi Tapas,<br>
<div class="im">&gt; You have incuded CPIA , GSPCA and UVC drivers in make file of SRC<br>
&gt; directory . I think that all the drivers that you have incuded in make<br>
&gt; file should work .  Please correct me if I am not correct. The UVC<br>
&gt; driver for my laptop is not working . I am trying to make it work.<br>
<br>
</div>I tried the UVC driver, but unfortunately this driver does not support<br>
video capturing trough the read system call.  To make it work you have<br>
to add the code for capturing video through shared memory.  You should<br>
have a look into the the V4L2 documentation for that.<br>
<br>
Ciao, Dirk.<br>
<br>
<br>
<br>
</blockquote></div><br>