Without this patch pcre-config adds -R/usr/lib/amd64 flags,
and screws gcc-6 builds

--- pcre-8.41/pcre-config.in.1	2018-01-26 18:10:09.268940268 +0000
+++ pcre-8.41/pcre-config.in	2018-01-26 18:10:54.409535157 +0000
@@ -34,9 +34,6 @@
 
 libR=
 case `uname -s` in
-  *SunOS*)
-  libR=" -R@libdir@"
-  ;;
   *BSD*)
   libR=" -Wl,-R@libdir@"
   ;;