Error in pgsql compilation

hello everyone,

i am trying to compile postgresql95 (with LINUX_ELF=true) on
slakware Linux 2.0.0 running on i586, with tcl7.5 and tk4.1. I have also enabled
USE_TCL=true and related configuration options.

i get compilation error regarding somefile dlfcn.h missing. The correspong part
of error message is given below ..

-----------------
make[3]: Entering directory `/pdsw/porter/san/pgsql/src/backend/utils/fmgr'
gcc -Wall -Wmissing-prototypes -O2 -m486  -Dlinux  -I../.. -I../../port/linux -I../../../include -DLINUX_ELF   -c
dfmgr.c-o dfmgr.o 
In file included from dfmgr.c:29:
../../port/linux/port-protos.h:19: dlfcn.h: No such file or directory
make[3]: *** [dfmgr.o] Error 1
make[3]: Leaving directory `/pdsw/porter/san/pgsql/src/backend/utils/fmgr'
make[2]: *** [submake] Error 2
make[2]: Leaving directory `/pdsw/porter/san/pgsql/src/backend/utils'
make[1]: *** [postgres_group4] Error 2
make[1]: Leaving directory `/pdsw/porter/san/pgsql/src/backend'
make: *** [all] Error 2
-----------------

I checked out for the file. It is not there in the distribution i have. The
only dlfcn.h i could find in entire distribution was for ``aix''.

If anyone has this file for linux OR knows how/where to get it, please tell
me. I don't think the documentaion given (i haven't read all of it yet) with
distribution talks about such kind of errors!!

thanks for any help in this matter.

sandeep (san@cs.unipune.ernet.in)