diff --git a/Changes b/Changes
index 19f59ed09..077c6da64 100644
--- a/Changes
+++ b/Changes
@@ -3046,4 +3046,6 @@ seen. gmtime warning still there
 - help.conf: updated snomasks section.
 - Added a patch by baafie to fix a problem where environment variables could not
   be specified in the Config script (#0001657)
-- Imported TRE 0.6.6 on Win32
+- Imported TRE 0.6.6 on Win32 and Linux
+- Made use of TRE's pkg-config support to solve a problem with libintl reported by
+  raistlinmajere (#0001592)
diff --git a/Makefile.in b/Makefile.in
index 004ab5f03..0a4f7bcdc 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -34,7 +34,7 @@ FROMDOS=/home/cmunk/bin/4dos
 #
 
 #XCFLAGS=-O -g -export-dynamic
-IRCDLIBS=@IRCDLIBS@ -L../extras/regexp/lib -ltre
+IRCDLIBS=@IRCDLIBS@ @TRELIBS@
 CRYPTOLIB=@CRYPTOLIB@
 OPENSSLINCLUDES=
 
diff --git a/autoconf/configure.in b/autoconf/configure.in
index 2da9692a6..d54bae1ca 100644
--- a/autoconf/configure.in
+++ b/autoconf/configure.in
@@ -28,6 +28,8 @@ AC_PATH_PROG(INSTALL,install)
 AC_CHECK_PROG(MAKER, gmake, gmake, make)
 AC_PATH_PROG(GMAKE,gmake)
 AC_PATH_PROG(GUNZIP, gunzip)
+AC_PATH_PROG(PKGCONFIG, pkg-config)
+
 dnl Checks for libraries.
 AC_CHECK_LIB(descrypt, crypt, [AC_DEFINE(HAVE_CRYPT) IRCDLIBS="$IRCDLIBS-ldescrypt " MKPASSWDLIBS="-ldescrypt"],
 AC_CHECK_LIB(crypt, crypt,[ AC_DEFINE(HAVE_CRYPT) IRCDLIBS="$IRCDLIBS-lcrypt " MKPASSWDLIBS="-lcrypt"]))
@@ -374,8 +376,9 @@ else
 	tar xf tre.tar
 fi
 dnl REMEMBER TO CHANGE WITH A NEW RELEASE!
+tre_version="0.6.6"
 AC_MSG_RESULT(configuring TRE regex library)
-cd tre-0.6.5
+cd tre-$tre_version
 ./configure --disable-agrep --disable-shared --disable-system-abi --disable-wchar --disable-multibyte --prefix=$cur_dir/extras/regexp
 AC_MSG_RESULT(compiling TRE regex library)
 $ac_cv_prog_MAKER
@@ -383,6 +386,12 @@ AC_MSG_RESULT(installing TRE regex library)
 $ac_cv_prog_MAKER install
 TREINCDIR="$cur_dir/extras/regexp/include"
 AC_SUBST(TREINCDIR)
+if test "x$ac_cv_path_PKGCONFIG" = "x" ; then
+	TRELIBS="-L../extras/regexp/lib -ltre"
+else
+	TRELIBS=`$ac_cv_path_PKGCONFIG --libs tre.pc`
+fi
+AC_SUBST(TRELIBS)
 cd $cur_dir
 AC_OUTPUT(Makefile src/modules/Makefile unreal ircdcron/ircdchk)
 chmod 0700 unreal
diff --git a/configure b/configure
index 2b3454137..fd0a4b62c 100755
--- a/configure
+++ b/configure
@@ -2340,6 +2340,46 @@ else
 echo "${ECHO_T}no" >&6
 fi
 
+# Extract the first word of "pkg-config", so it can be a program name with args.
+set dummy pkg-config; ac_word=$2
+echo "$as_me:$LINENO: checking for $ac_word" >&5
+echo $ECHO_N "checking for $ac_word... $ECHO_C" >&6
+if test "${ac_cv_path_PKGCONFIG+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  case $PKGCONFIG in
+  [\\/]* | ?:[\\/]*)
+  ac_cv_path_PKGCONFIG="$PKGCONFIG" # Let the user override the test with a path.
+  ;;
+  *)
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+  for ac_exec_ext in '' $ac_executable_extensions; do
+  if $as_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_path_PKGCONFIG="$as_dir/$ac_word$ac_exec_ext"
+    echo "$as_me:$LINENO: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+done
+
+  ;;
+esac
+fi
+PKGCONFIG=$ac_cv_path_PKGCONFIG
+
+if test -n "$PKGCONFIG"; then
+  echo "$as_me:$LINENO: result: $PKGCONFIG" >&5
+echo "${ECHO_T}$PKGCONFIG" >&6
+else
+  echo "$as_me:$LINENO: result: no" >&5
+echo "${ECHO_T}no" >&6
+fi
+
+
 echo "$as_me:$LINENO: checking for crypt in -ldescrypt" >&5
 echo $ECHO_N "checking for crypt in -ldescrypt... $ECHO_C" >&6
 if test "${ac_cv_lib_descrypt_crypt+set}" = set; then
@@ -9998,9 +10038,10 @@ else
 	cp tre.tar.gz.bak tre.tar.gz
 	tar xf tre.tar
 fi
+tre_version="0.6.6"
 echo "$as_me:$LINENO: result: configuring TRE regex library" >&5
 echo "${ECHO_T}configuring TRE regex library" >&6
-cd tre-0.6.5
+cd tre-$tre_version
 ./configure --disable-agrep --disable-shared --disable-system-abi --disable-wchar --disable-multibyte --prefix=$cur_dir/extras/regexp
 echo "$as_me:$LINENO: result: compiling TRE regex library" >&5
 echo "${ECHO_T}compiling TRE regex library" >&6
@@ -10010,6 +10051,12 @@ echo "${ECHO_T}installing TRE regex library" >&6
 $ac_cv_prog_MAKER install
 TREINCDIR="$cur_dir/extras/regexp/include"
 
+if test "x$ac_cv_path_PKGCONFIG" = "x" ; then
+	TRELIBS="-L../extras/regexp/lib -ltre"
+else
+	TRELIBS=`$ac_cv_path_PKGCONFIG --libs tre.pc`
+fi
+
 cd $cur_dir
 ac_config_files="$ac_config_files Makefile src/modules/Makefile unreal ircdcron/ircdchk"
 cat >confcache <<\_ACEOF
@@ -10583,6 +10630,7 @@ s,@INSTALL@,$INSTALL,;t t
 s,@MAKER@,$MAKER,;t t
 s,@GMAKE@,$GMAKE,;t t
 s,@GUNZIP@,$GUNZIP,;t t
+s,@PKGCONFIG@,$PKGCONFIG,;t t
 s,@IRCDLIBS@,$IRCDLIBS,;t t
 s,@MKPASSWDLIBS@,$MKPASSWDLIBS,;t t
 s,@CPP@,$CPP,;t t
@@ -10595,6 +10643,7 @@ s,@IRCDDIR@,$IRCDDIR,;t t
 s,@BINDIR@,$BINDIR,;t t
 s,@FD_SETSIZE@,$FD_SETSIZE,;t t
 s,@TREINCDIR@,$TREINCDIR,;t t
+s,@TRELIBS@,$TRELIBS,;t t
 CEOF
 
 _ACEOF
diff --git a/extras/tre.tar.gz b/extras/tre.tar.gz
index 68dadbc5e..63a31e235 100644
Binary files a/extras/tre.tar.gz and b/extras/tre.tar.gz differ