make Perl optional (but enabled by default) and fix Perl dependency

postgresql/postgresql.spec

@@ -23,6 +23,11 @@
 ##  SUCH DAMAGE.
 ##
 
+#   package options
+%ifndef       with_perl
+%define       with_perl  yes
+%endif
+
 #   package information
 Name:         postgresql
 Summary:      PostgreSQL Database
@@ -44,6 +49,10 @@ Prefix:       %{l_prefix}
 BuildRoot:    %{l_buildroot}
 BuildPreReq:  OpenPKG, openpkg >= 20020416, make, gcc, readline, openssl, flex, bison
 PreReq:       OpenPKG, openpkg >= 20020416
+%if "%{with_perl}" == "yes"
+BuildPreReq:  perl
+PreReq:       perl
+%endif
 AutoReq:      no
 AutoReqProv:  no
 
@@ -53,6 +62,9 @@ AutoReqProv:  no
      and user-defined types and functions. It is the most advanced
      open-source database available anywhere.
 
+     Options:
+     --define 'with_perl %{with_perl}'
+
 %prep
     %setup -q
     %{l_shtool} subst \
@@ -61,13 +73,14 @@ AutoReqProv:  no
 
 %build
     #    configure package
-    PATH="%{l_prefix}/bin:$PATH"; export PATH
     CC="%{l_cc}" \
     CFLAGS="%{l_cflags -O}" \
     ./configure \
         --prefix=%{l_prefix} \
         --with-openssl=%{l_prefix} \
+%if "%{with_perl}" == "yes"
         --with-perl \
+%endif
         --without-CXX \
         --disable-syslog
 
@@ -78,7 +91,6 @@ AutoReqProv:  no
     rm -rf $RPM_BUILD_ROOT
 
     #   perform standard installation procedure
-    PATH="%{l_prefix}/bin:$PATH"; export PATH
     %{l_make} %{l_mflags} install DESTDIR=$RPM_BUILD_ROOT
 
     #   strip down installation