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load error while creating shared library

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Operating Systems Linux load error while creating shared library
# 1  
Old 01-16-2006
Network load error while creating shared library
Hi,

I am trying to create shared library. When i run the script to build the library i get these errors

ld: warning: option -o appears more than once, first setting taken
ld: fatal: file libgc.so.0: open failed: No such file or directory
ld: fatal: File processing errors. No output written to libgc.so.0.0
collect2: ld returned 1 exit status
./shared.sh: /sbin/ldconfig: not found
ln: cannot create libgc.so: File exists
demo.c: In function `main':
demo.c:5: warning: return type of `main' is not `int'
ld: fatal: library -lgc: not found
ld: fatal: File processing errors. No output written to demo-shared
collect2: ld returned 1 exit status
./shared.sh: ./demo-shared: not found

Please, explain me what is this warning.
Here, you can find the details of script
#!/bin/sh
gcc -fPIC -g -c libgc.c
gcc -g -shared -Wl,-soname,libgc.so.0 \
-o libgc.so.0.0 libgc.o -lc
/sbin/ldconfig -n .
ln -sf libgc.so.0 libgc.so
gcc -g -c demo.c -o demo.o
gcc -g -o demo-shared demo.o -L. -lgc
LD_LIBRARY_PATH="." ./demo-shared


Thanks in advance.
masg1
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LEARN ABOUT HPUX

dlgetmodinfo

dlgetmodinfo(3C)														  dlgetmodinfo(3C)

NAME

       dlgetmodinfo() - retrieve information about a loaded module (program or shared library)

SYNOPSIS

       [flag... ] file ...  [library] ...

   Multithread Usage
       Thread safe in but not in

DESCRIPTION

       is one of a family of routines that give the user direct access to the dynamic linking facilities.  retrieves information about a load mod-
       ule from an index specifying the placement of the load module in the dynamic loader's search list.  Unlike can retrieve information about a
       load  module  in another process.  index of requests information about the dynamic loader.  An index of requests information about the pro-
       gram file itself.  The routine fills the load_module_desc with information from the matching load module.

       The desc, desc_size, read_tgt_mem, ident_parm, and load_map_parm parameters are identical to those for See dlmodinfo(3C).

RETURN VALUE

       If successful, returns a handle for the shared library as defined by the return value from NULL is returned otherwise.  The  return  values
       are type-converted to

ERRORS

       If fails, a subsequent call to returns one of the following values:
	      Cannot apply relocation in library.

	      Invalid address.

	      Invalid descriptor argument.

	      Invalid descriptor version.

	      Invalid load module index.

	      Out of memory.

	      failed in reading target memory.

	      failed on entry to or exit from

	      failed on exit from

	      failed on entry to

AUTHOR

       was developed by HP.

SEE ALSO

   System Tools
       exec(2)		 System loader.
       ld(1)		 Invokes the link editor.

   Miscellaneous
       a.out(4) 	 Assembler, compiler, and linker output.
       dlclose(3C)	 Unloads a shared library previously loaded by
       dlerror(3C)	 Returns the last error message recorded by
       dlerrno(3C)	 Returns an error code for the last error recorded by
       dlget(3C)	 Returns information about a loaded module.
       dlgetname(3C)	 Returns the name of the storage containing a load module.
       dlopen(3C)	 Loads a shared library.
       dlsym(3C)	 Gets the address of a symbol in a shared library.
       dlmodinfo(3C)	 Retrieve information about a loaded module (program or shared library).

   Texts and Tutorials
       (See the 	 option)
       (See		 manuals(5) for ordering information)

																  dlgetmodinfo(3C)