`make install` will install /usr/local/lib/libz.a
You are responsible for the include file being right.

We strongly recommend the following changes

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--- Makefile.orig	Thu May 18 17:10:22 1995
+++ Makefile	Thu May 18 17:34:44 1995
@@ -185,11 +185,11 @@
 # before the first Monday in January when a "%V" format is used and January 1
 # falls on a Friday, Saturday, or Sunday.
 
-CFLAGS=
+CFLAGS=-DTM_GMTOFF=tm_gmtoff -DTM_ZONE=tm_zone -DSTD_INSPIRED -D_NEWTIME
 
 ################################################################################
 
-cc=		cc
+cc=		gcc
 CC=		$(cc) -DTZDIR=\"$(TZDIR)\"
 
 TZCSRCS=	zic.c localtime.c asctime.c scheck.c ialloc.c
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