Re-enable --as-needed; workaround Perl breakage.

- Re-enable --as-needed, now that PCRE has been patched.
- Add workaround for improper linking of some Perl modules.

cyrus-imapd.spec

@@ -1,10 +1,5 @@
 %define scmt(l:) %(c=%1; echo ${c:0:%{-l:%{-l*}}%{!-l:7}})
 
-# Disable passing --as-needed to the linker; it breaks cyrus terribly for
-# reasons I don't understand.
-# https://github.com/cyrusimap/cyrus-imapd/issues/2629
-%undefine _ld_as_needed
-
 # Cassandane commit hash.  Cassandane doesn't have releases often, but it
 # receives constant development.  This was fetched on 20180518.
 %global cocas c8040fd9e3a3c9ec96a7b58ff8a0601756108d46
@@ -14,7 +9,7 @@
 
 Name: cyrus-imapd
 Version: 3.0.8
-Release: 5%{?dist}
+Release: 6%{?dist}
 
 %define ssl_pem_file /etc/pki/%name/%name.pem
 
@@ -52,6 +47,12 @@ Patch3: patch-vzic-proper-cflags
 # https://github.com/cyrusimap/cyrus-imapd/issues/2621
 Patch4: patch-clamav101
 
+# Ugly workaround for some compiled Perl modules not being linked against
+# libpcreposix, which causes them to fail to load.
+# https://bugzilla.redhat.com/show_bug.cgi?id=1668723
+# https://github.com/cyrusimap/cyrus-imapd/issues/2629#issuecomment-456925909
+Patch5: patch-cyrus-perl-linking
+
 Source10: cyrus-imapd.logrotate
 Source11: cyrus-imapd.pam-config
 Source12: cyrus-imapd.sysconfig
@@ -689,6 +690,10 @@ getent passwd cyrus >/dev/null || /usr/sbin/useradd -c "Cyrus IMAP Server" -d /v
 
 
 %changelog
+* Wed Jan 23 2019 Jason L Tibbitts III <tibbs@math.uh.edu> - 3.0.8-6
+- Re-enable --as-needed, now that PCRE has been patched.
+- Add workaround for improper linking of some Perl modules.
+
 * Tue Jan 15 2019 Jason L Tibbitts III <tibbs@math.uh.edu> - 3.0.8-5
 - Disable passing --as-needed to to the linker.  This breaks cyrus horribly.
 - Re-enable Cassandane run.

patch-cyrus-perl-linking

@@ -0,0 +1,26 @@
+diff --git a/perl/imap/Makefile.PL.in b/perl/imap/Makefile.PL.in
+index a0fda4a..5fb0f1f 100644
+--- a/perl/imap/Makefile.PL.in
++++ b/perl/imap/Makefile.PL.in
+@@ -89,7 +89,7 @@ WriteMakefile(
+ 		},
+     'clean'	=> {'FILES' => 'libcyrperl.a cyradm'},
+     'OBJECT'    => 'IMAP.o',
+-    'MYEXTLIB'  => '@top_builddir@/perl/.libs/libcyrus.a @top_builddir@/perl/.libs/libcyrus_min.a',
++    'MYEXTLIB'  => '@top_builddir@/perl/.libs/libcyrus.a @top_builddir@/perl/.libs/libcyrus_min.a -lpcreposix',
+     'LIBS'	=> [ "$LIB_SASL @SSL_LIBS@ @LIB_UUID@ @ZLIB@"],
+     'DEFINE'	=> '-DPERL_POLLUTE',    # e.g., '-DHAVE_SOMETHING' 
+     'INC'	=> "-I@top_srcdir@ -I@top_srcdir@/com_err/et @SASLFLAGS@ @SSL_CPPFLAGS@ -I@top_srcdir@/perl/imap", 
+diff --git a/perl/sieve/managesieve/Makefile.PL.in b/perl/sieve/managesieve/Makefile.PL.in
+index 2a3415a..f2a2592 100644
+--- a/perl/sieve/managesieve/Makefile.PL.in
++++ b/perl/sieve/managesieve/Makefile.PL.in
+@@ -68,7 +68,7 @@ WriteMakefile(
+     'NAME'	=> 'Cyrus::SIEVE::managesieve',
+     'ABSTRACT'  => 'Cyrus Sieve management interface',
+     'VERSION_FROM' => "@top_srcdir@/perl/sieve/managesieve/managesieve.pm", # finds $VERSION
+-    'MYEXTLIB'  => '../lib/.libs/libisieve.a @top_builddir@/perl/.libs/libcyrus.a @top_builddir@/perl/.libs/libcyrus_min.a',
++    'MYEXTLIB'  => '../lib/.libs/libisieve.a @top_builddir@/perl/.libs/libcyrus.a @top_builddir@/perl/.libs/libcyrus_min.a -lpcreposix',
+     'LIBS'	=> ["$LIB_SASL @SSL_LIBS@ @LIB_UUID@ @ZLIB@ @SQLITE_LIBADD@ @MYSQL_LIBADD@ @PGSQL_LIBADD@"],
+     'CCFLAGS'	=> '@GCOV_CFLAGS@',
+     'DEFINE'	=> '-DPERL_POLLUTE',     # e.g., '-DHAVE_SOMETHING'