Problem with application w3cam

Hi,Ankur

As you said"

Just check how *.h files are included in your source code,

is it some inner dir of include path ( include <linux/libjpeg.h>)or simple include

( include <libjpeg.h>)."

I changed in w3cam.c because it could not find png.h, jpeglib.h and zlib.h

The changed as follows:# ifdef HAVE_LIBZ# include <lib/zlib/zlib.h> //instea of <zlib.h># endif# ifdef HAVE_LIBPNG# include <lib/libpng/png.h> //instead of <png.h># endif# ifdef HAVE_LIBJPEG# include <lib/libjpeg/jpeglib.h> //instead of <jpeglib.h># endif

After these changes and compiling following error occurs:

make[2]: Entering directory `/home/leewood/uClinux-dist-test/user/w3cam&#39;

nios2-linux-uclibc-gcc -Os -g -Dlinux -D__linux__ -Dunix -D__uClinux__ -DEMBED -I/home/leewood/uClinux-dist-test -fno-builtin -DHAVE_LIBM=1 -DHAVE_LIBZ=1 -DHAVE_LIBPNG=1 -DHAVE_LIBJPEG=1 -DVIDEO_DEV=\"/dev/video\" -DVERSION=\"0.7.2\" -c -o w3cam.o w3cam.c

nios2-linux-uclibc-gcc -Os -g -Dlinux -D__linux__ -Dunix -D__uClinux__ -DEMBED -I/home/leewood/uClinux-dist-test -fno-builtin -Wl,-d -Wl,-elf2flt -Os -g -Dlinux -D__linux__ -Dunix -D__uClinux__ -DEMBED -I/home/leewood/uClinux-dist-test -fno-builtin -DHAVE_LIBM=1 -DHAVE_LIBZ=1 -DHAVE_LIBPNG=1 -DHAVE_LIBJPEG=1 -DVIDEO_DEV=\"/dev/video\" -DVERSION=\"0.7.2\" -o w3cam.cgi w3cam.o cgi.o v4l.o -lpng -ljpeg -lz -lm -L/home/leewood/uClinux-dist-test/lib/libnet -L/home/leewood/uClinux-dist-test/lib/libdes -L/home/leewood/uClinux-dist-test/lib/libaes -L/home/leewood/uClinux-dist-test/lib/libpcap -L/home/leewood/uClinux-dist-test/lib/libssl -lcrypt -lutil -lc

/opt/nios2/lib/gcc/nios2-linux-uclibc/3.4.6/../../../../nios2-linux-uclibc/bin/ld.real: cannot find -lpng

collect2: ld returned 1 exit status

make[2]: *** [w3cam.cgi] &#38169;&#35823; 1

make[2]: Leaving directory `/home/leewood/uClinux-dist-test/user/w3cam&#39;

make[1]: *** [all] &#38169;&#35823; 2

make[1]: Leaving directory `/home/leewood/uClinux-dist-test/user&#39;

make: *** [subdirs] &#38169;&#35823; 1

[leewood@localhost uClinux-dist-test]$

Based on the error message,I think the problem about *.h file have been solved.(Is it right?) But a new problem appears.

Pls give me some advice or a hint.Thx.

And because i am a newbie about linux,would you like to recommend some useful information about linux compiling and linking? Thank you.

--leewood