Cannot Build C Application with GCC because of undefined reference to 'deflateEnd'

Question

Here is the error snippet

/home/jamesblack/Development/v2server/svr_tick.c:1309: undefined reference to `deflateEnd'

This happens when I run my makefile, it looks like it runs this command.

gcc -O -g -lm -lz -lcrypt -o server .obj/server.o .obj/svr_disk.o .obj/svr_tick.o .obj/svr_act.o .obj/driver.o .obj/svr_god.o .obj/svr_do.o .obj/svr_glob.o .obj/build.o .obj/use_driver.o .obj/look_driver.o .obj/svr_effect.o .obj/driver_etc.o .obj/driver_generic.o .obj/populate.o .obj/helper.o .obj/skill.o .obj/skill_driver.o .obj/talk.o .obj/area.o .obj/path.o .obj/stunrun.o .obj/cityattack.o .obj/npc_malte.o .obj/lab9.o .obj/rdtsc.o .obj/ccp_driver.o  

And then it spouts of alot of errors similar to that, everything i've googled mentions installing zlib and linking it with -lz, which is clearly in the make command, also im pretty sure i installed it right. apt-get install zlib1g-dev in ubuntu 11 64bit

Any thoughts

EDIT:

My zlib.h located at /usr/local/zlib/include/zlib.h includes this

ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
/*
 All dynamically allocated data structures for this stream are freed.
This function discards any unprocessed input and does not flush any pending
output.

 deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
stream state was inconsistent, Z_DATA_ERROR if the stream was freed
prematurely (some input or output was discarded).  In the error case, msg
may be set but then points to a static string (which must not be
deallocated).
*/

Is this what I need it to have? Also echo $LD_LIBRARY_PATH doens't return anything. Do I truly have Zlib configure properly?

EDIT 2:

gcc -I/usr/local/zlib/include -O -g -lm -lz -lcrypt -o server .obj/server.o .obj/svr_disk.o .obj/svr_tick.o .obj/svr_act.o .obj/driver.o .obj/svr_god.o .obj/svr_do.o .obj/svr_glob.o .obj/build.o .obj/use_driver.o .obj/look_driver.o .obj/svr_effect.o .obj/driver_etc.o .obj/driver_generic.o .obj/populate.o .obj/helper.o .obj/skill.o .obj/skill_driver.o .obj/talk.o .obj/area.o .obj/path.o .obj/stunrun.o .obj/cityattack.o .obj/npc_malte.o .obj/lab9.o .obj/rdtsc.o .obj/ccp_driver.o 

Answer 1

Put the libraries after the object files, so modify the makefile or rewrite the link command so that instead of being like this (as in the question):

gcc -O -g -lm -lz -lcrypt -o server .obj/server.o .obj/svr_disk.o .obj/svr_tick.o \
    .obj/svr_act.o .obj/driver.o .obj/svr_god.o .obj/svr_do.o .obj/svr_glob.o \
    .obj/build.o .obj/use_driver.o .obj/look_driver.o .obj/svr_effect.o \
    .obj/driver_etc.o .obj/driver_generic.o .obj/populate.o .obj/helper.o \
    .obj/skill.o .obj/skill_driver.o .obj/talk.o .obj/area.o .obj/path.o \
    .obj/stunrun.o .obj/cityattack.o .obj/npc_malte.o .obj/lab9.o \
    .obj/rdtsc.o .obj/ccp_driver.o  

It should be like this:

gcc -O -g -o server .obj/server.o .obj/svr_disk.o .obj/svr_tick.o .obj/svr_act.o \
    .obj/driver.o .obj/svr_god.o .obj/svr_do.o .obj/svr_glob.o .obj/build.o \
    .obj/use_driver.o .obj/look_driver.o .obj/svr_effect.o .obj/driver_etc.o \
    .obj/driver_generic.o .obj/populate.o .obj/helper.o .obj/skill.o \
    .obj/skill_driver.o .obj/talk.o .obj/area.o .obj/path.o .obj/stunrun.o \
    .obj/cityattack.o .obj/npc_malte.o .obj/lab9.o .obj/rdtsc.o .obj/ccp_driver.o \
    -lm -lz -lcrypt

The linker only pulls in symbols from shared libraries if at least one of the symbols satisfies an outstanding undefined reference; when the libraries come first, they don't usually have a main() and that's what the linker is looking for to start with. (This is a change of behaviour; a few years ago, the linker tended to pull in every shared library, regardless of whether it satisfied any undefined symbols.)