Thank you Mr. Glisse. My libiconv.so file is in /usr/local/lib and it's a shared library. How do I compile the source foo.c which contains iconv.h header? I normally compile like this, 'gcc -Wall -g foo.c -o foo' . I used 'gcc -Wall -g -I/usr/local/lib foo.c -o foo' . but still there's same error. Tried with 'gcc -Wall -g -I/usr/local/include foo.c -o foo' , still the problem persists. Rifat Mahmud On Wed, Nov 3, 2010 at 5:02 PM, Marc Glisse <marc.glisse@xxxxxxxx> wrote: > On Wed, 3 Nov 2010, Rifat Mahmud wrote: > >> I installed libiconv and used '#include<iconv.h>' in a source code. >> After compiling gcc prints >> >> /tmp/ccgsye0A.o: In function `main': >> /home/rifat/Documents/Sources/test1.c:12: undefined reference to >> `libiconv_open' > > That's normal. When you want to use external functionality in a program, you > need 2 things: a #include to tell your code about the interface of that > functionality and a corresponding -l flag on the command line telling which > library to take the functionality from. > #include <math.h> ----> gcc ... -lm > #include <stdlib.h> ----> gcc ... -lc (this one is actually implicit) > #include <iconv.h> ----> gcc ... -liconv (if you are using the iconv.h from > libiconv, -lc otherwise) > >> How can I solve this problem. I probably didn't overwrite the system >> iconv.h file, which is in /usr/local/include . I'm very much a rookie >> in gcc, please help me out, Thank you. > > I doubt the system iconv.h is in /usr/local. > > -- > Marc Glisse >
