Dynamic Linker

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Well! I downloaded the latest glibc and working on
that. In that I want  to know the exact use of
rtld.c file. Its is in the elf directory. So what
happpends to ld.so when a make is done in elf

I inserted  my own function in rtld.c file and did
a make in elf directory.

Iam trying to call that function in one my program
located in some other directory. For that i'm
using the make file as follows

CC = gcc
CFLAGS = -Wall

all: test-ld test-reg

test.o: test.c
    gcc -c test.c

test-ld: test.o


test.o -o test-ld -ldl

test-reg: test.o
 gcc test.o -o test-reg

But it gives me the following error

gcc test.o -o test-reg
test.o: In function `main':
test.o(.text+0x11): undefined reference to
test.o(.text+0x41): undefined reference to
test.o(.text+0x51): undefined reference to `dlsym'

test.o(.text+0x5c): undefined reference to
test.o(.text+0x91): undefined reference to
collect2: ld returned 1 exit status
make: *** [test-reg] Error 1

I was wondering what's happening.

Thanks in advance

Navin Kumar Vedagiri
Graduate Teaching Assistant
Department Of Computer Science,
New Mexico State University,
Las Cruces, NM - 88001
Res: (505) 532 1273
Off: (505) 646 3198

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