From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.5)
Gecko/20031107 Debian/1.5-3

Description of problem:
gcc -Wmissing-prototypes -Wformat -DHAS_LDAP -DHAS_PCRE
-I/usr/include/pcre -DUSE_SASL_AUTH -I/usr/include/sasl -DHAS_SSL
-I/usr/kerberos/include   -O2 -g -march=i386 -mcpu=i686 -I.
-I../../include -DLINUX2 -o master master.o master_conf.o master_ent.o
master_sig.o master_avail.o master_spawn.o master_service.o
master_status.o master_listen.o master_vars.o master_wakeup.o
master_flow.o ../../lib/libglobal.a ../../lib/libutil.a -L/usr/lib
-lldap -llber -lpcre -L/usr/lib/sasl2 -lsasl2 -L/usr/kerberos/lib
-lssl -lcrypto -lgssapi_krb5 -lkrb5 -lcom_err -lk5crypto -lresolv -ldl
-lz  -ldb -lnsl -lresolv
/usr/bin/ld: cannot find -lz
collect2: ld returned 1 exit status
make: *** [master] Error 1
make: *** [update] Error 1
virhe: Bad exit status from /var/tmp/rpm-tmp.72468 (%build)


Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. rebuild postfix without zlib-devel installed.
2. rebuilding fails

Additional info: