build-system: Allow building with static pjproject

Background here:
http://lists.digium.com/pipermail/asterisk-dev/2016-January/075266.html

From CHANGES:
 * To help insure that Asterisk is compiled and run with the same known
   version of pjproject, a new option (--with-pjproject-bundled) has been
   added to ./configure.  When specified, the version of pjproject specified
   in third-party/versions.mak will be downloaded and configured.  When you
   make Asterisk, the build process will also automatically build pjproject
   and Asterisk will be statically linked to it.  Once a particular version
   of pjproject is configured and built, it won't be configured or built
   again unless you run a 'make distclean'.

   To facilitate testing, when 'make install' is run, the pjsua and pjsystest
   utilities and the pjproject python bindings will be installed in
   ASTDATADIR/third-party/pjproject.

   The default behavior remains building with the shared pjproject
   installation, if any.

Building:

   All you have to do is include the --with-pjproject-bundled option on
   the ./configure command line (and remove any existing --with-pjproject
   option if specified).  Everything else is automatic.

Behind the scenes:

   The top-level Makefile was modified to include 'third-party' in the
   list of MOD_SUBDIRS.

   The third-party directory was created to contain any third party
   packages that may be needed in the future.  Its Makefile automatically
   iterates over any subdirectories passing on targets.

   The third-party/pjproject directory was created to house the pjproject
   source distribution.  Its Makefile contains targets to download, patch
   configure, generate dependencies, compile libs, apps and python bindings,
   sanitized build.mak and generate a symbols list.

   When bootstrap.sh is run, it automatically includes the configure.m4
   file in third-party/pjproject.  This file has a macro to download and
   conifgure pjproject and get and set PJPROJECT_INCLUDE, PJPROJECT_DIR
   and PJPROJECT_BUNDLED.  It also tests for the capabilities like
   PJ_TRANSACTION_GRP_LOCK by parsing preprocessor output as opposed to
   trying to compile.  Of course, bootstrap.sh is only run once and the
   configure file is incldued in the patch.

   When configure is run with the new options, the macro in configure.m4
   triggers the download, patch, conifgure and tests.  No compilation is
   performed at this time.  The downloaded tarball is cached in /tmp so
   it doesn't get downloaded again on a distclean.

   When make is run in the top-level Asterisk source directory, it will
   automatically descend all the subdirectories in third_party just as it
   does for addons, apps, etc.  The top-level Makefile makes sure that
   the 'third-party' is built before 'main' so that dependencies from the
   other directories are built first.

   When main does build, a new shared library (libasteriskpj) is created that
   links statically to the pjproject .a files and exports all their symbols.
   The asterisk binary links to that, just as it does with libasteriskssl.

   When Asterisk is installed, the pjsua and pjsystest apps, and the pjproject
   python bindings are installed in ASTDATADIR/third-party/pjproject.  This
   will facilitate testing, including running the testsuite which will be
   updated to check that directory for the pjsua module ahead of the system
   python library.

Modules should continue to depend on pjproject if they use pjproject APIs
directly.  They should not care about the implementation.  No changes to any
res_pjsip modules were made.

Change-Id: Ia7a60c28c2e9ba9537c5570f933c1ebcb20a3103

1 files changed, 429 insertions, 40 deletions

diff --git a/configure b/configure
index cceae121e..fbafe1274 100755
--- a/configure
+++ b/configure
@@ -907,6 +907,14 @@ PBX_PORTAUDIO
 PORTAUDIO_DIR
 PORTAUDIO_INCLUDE
 PORTAUDIO_LIB
+PBX_POPT
+POPT_DIR
+POPT_INCLUDE
+POPT_LIB
+PBX_PJSIP_EXTERNAL_RESOLVER
+PJSIP_EXTERNAL_RESOLVER_DIR
+PJSIP_EXTERNAL_RESOLVER_INCLUDE
+PJSIP_EXTERNAL_RESOLVER_LIB
 PBX_PJ_SSL_CERT_LOAD_FROM_FILES2
 PJ_SSL_CERT_LOAD_FROM_FILES2_DIR
 PJ_SSL_CERT_LOAD_FROM_FILES2_INCLUDE
@@ -927,10 +935,7 @@ PBX_PJSIP_DLG_CREATE_UAS_AND_INC_LOCK
 PJSIP_DLG_CREATE_UAS_AND_INC_LOCK_DIR
 PJSIP_DLG_CREATE_UAS_AND_INC_LOCK_INCLUDE
 PJSIP_DLG_CREATE_UAS_AND_INC_LOCK_LIB
-PBX_POPT
-POPT_DIR
-POPT_INCLUDE
-POPT_LIB
+PJPROJECT_BUNDLED
 PBX_PJPROJECT
 PJPROJECT_DIR
 PJPROJECT_INCLUDE
@@ -1350,6 +1355,7 @@ with_osptk
 with_oss
 with_postgres
 with_pjproject
+with_pjproject_bundled
 with_popt
 with_portaudio
 with_pri
@@ -2088,6 +2094,8 @@ Optional Packages:
   --with-oss=PATH         use Open Sound System files in PATH
   --with-postgres=PATH    use PostgreSQL files in PATH
   --with-pjproject=PATH   use PJPROJECT files in PATH
+  --with-pjproject-bundled
+                          Use bundled pjproject libraries
   --with-popt=PATH        use popt files in PATH
   --with-portaudio=PATH   use PortAudio files in PATH
   --with-pri=PATH         use ISDN PRI files in PATH
@@ -10401,6 +10409,7 @@ fi
 
 
 
+
     PJPROJECT_DESCRIP="PJPROJECT"
     PJPROJECT_OPTION="pjproject"
     PBX_PJPROJECT=0
@@ -10432,37 +10441,28 @@ fi
 
 
 
+PJPROJECT_BUNDLED=no
 
-    POPT_DESCRIP="popt"
-    POPT_OPTION="popt"
-    PBX_POPT=0
 
-# Check whether --with-popt was given.
-if test "${with_popt+set}" = set; then :
-  withval=$with_popt;
-	case ${withval} in
-	n|no)
-	USE_POPT=no
-	# -1 is a magic value used by menuselect to know that the package
-	# was disabled, other than 'not found'
-	PBX_POPT=-1
-	;;
-	y|ye|yes)
-	ac_mandatory_list="${ac_mandatory_list} POPT"
-	;;
-	*)
-	POPT_DIR="${withval}"
-	ac_mandatory_list="${ac_mandatory_list} POPT"
-	;;
-	esac
 
+# Check whether --with-pjproject-bundled was given.
+if test "${with_pjproject_bundled+set}" = set; then :
+  withval=$with_pjproject_bundled; case "${enableval}" in
+	      n|no) PJPROJECT_BUNDLED=no ;;
+	      *) PJPROJECT_BUNDLED=yes ;;
+	esac
 fi
 
 
 
+if test "$PJPROJECT_BUNDLED" = "yes" -a "${ac_mandatory_list#*PJPROJECT*}" != "$ac_mandatory_list" ; then
+   as_fn_error $? "--with-pjproject and --with-pjproject-bundled can't both be specified" "$LINENO" 5
+fi
 
-
-
+if test "$PJPROJECT_BUNDLED" = "yes" ; then
+   ac_mandatory_list="$ac_mandatory_list PJPROJECT"
+   PJPROJECT_DIR="${ac_top_build_prefix}third-party/pjproject"
+fi
 
 
 PJSIP_DLG_CREATE_UAS_AND_INC_LOCK_DESCRIP="PJSIP Dialog Create UAS with Incremented Lock"
@@ -10525,6 +10525,51 @@ PBX_PJ_SSL_CERT_LOAD_FROM_FILES2=0
 
 
 
+PJSIP_EXTERNAL_RESOLVER_DESCRIP="PJSIP External Resolver Support"
+PJSIP_EXTERNAL_RESOLVER_OPTION=pjsip
+PJSIP_EXTERNAL_RESOLVER_DIR=${PJPROJECT_DIR}
+
+PBX_PJSIP_EXTERNAL_RESOLVER=0
+
+
+
+
+
+
+
+
+    POPT_DESCRIP="popt"
+    POPT_OPTION="popt"
+    PBX_POPT=0
+
+# Check whether --with-popt was given.
+if test "${with_popt+set}" = set; then :
+  withval=$with_popt;
+	case ${withval} in
+	n|no)
+	USE_POPT=no
+	# -1 is a magic value used by menuselect to know that the package
+	# was disabled, other than 'not found'
+	PBX_POPT=-1
+	;;
+	y|ye|yes)
+	ac_mandatory_list="${ac_mandatory_list} POPT"
+	;;
+	*)
+	POPT_DIR="${withval}"
+	ac_mandatory_list="${ac_mandatory_list} POPT"
+	;;
+	esac
+
+fi
+
+
+
+
+
+
+
+
     PORTAUDIO_DESCRIP="PortAudio"
     PORTAUDIO_OPTION="portaudio"
     PBX_PORTAUDIO=0
@@ -24153,6 +24198,244 @@ $as_echo "$as_me: *** including --without-postgres" >&6;}
    fi
 fi
 
+if test "$USE_PJPROJECT" != "no" ; then
+   if test "$PJPROJECT_BUNDLED" = "yes" ; then
+
+
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for embedded pjproject (may have to download)" >&5
+$as_echo_n "checking for embedded pjproject (may have to download)... " >&6; }
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: configuring" >&5
+$as_echo "configuring" >&6; }
+	make --quiet --no-print-directory -C $PJPROJECT_DIR configure
+	if test $? -ne 0 ; then
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: failed" >&5
+$as_echo "failed" >&6; }
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: Unable to configure $PJPROJECT_DIR" >&5
+$as_echo "$as_me: Unable to configure $PJPROJECT_DIR" >&6;}
+		as_fn_error $? "Run \"make -C $PJPROJECT_DIR NOISY_BUILD=yes configure\" to see error details." "$LINENO" 5
+	fi
+
+	PJPROJECT_INCLUDE=$(make --quiet --no-print-directory -C $PJPROJECT_DIR echo_cflags)
+	PJPROJECT_CFLAGS="$PJPROJECT_INCLUDE"
+	PBX_PJPROJECT=1
+	PJPROJECT_BUNDLED=yes
+
+$as_echo "#define HAVE_PJPROJECT 1" >>confdefs.h
+
+
+$as_echo "#define HAVE_PJPROJECT_BUNDLED 1" >>confdefs.h
+
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for embedded pjproject" >&5
+$as_echo_n "checking for embedded pjproject... " >&6; }
+	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+
+
+	PJSIP_DLG_CREATE_UAS_AND_INC_LOCK_INCLUDE="$PJPROJECT_INCLUDE"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pjsip_dlg_create_uas_and_inc_lock declared in pjsip.h" >&5
+$as_echo_n "checking for pjsip_dlg_create_uas_and_inc_lock declared in pjsip.h... " >&6; }
+
+	saved_cpp="$CPPFLAGS"
+	CPPFLAGS="$PJPROJECT_INCLUDE"
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pjsip.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "pjsip_dlg_create_uas_and_inc_lock" >/dev/null 2>&1; then :
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+		PBX_PJSIP_DLG_CREATE_UAS_AND_INC_LOCK=1
+
+$as_echo "#define HAVE_PJSIP_DLG_CREATE_UAS_AND_INC_LOCK 1" >>confdefs.h
+
+
+else
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f conftest*
+
+
+	CPPGLAGS="$saved_cpp"
+	PJSIP_DLG_CREATE_UAS_AND_INC_LOCK_INCLUDE="$PJPROJECT_INCLUDE"
+
+
+	PJ_TRANSACTION_GRP_LOCK_INCLUDE="$PJPROJECT_INCLUDE"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pjsip_tsx_create_uac2 declared in pjsip.h" >&5
+$as_echo_n "checking for pjsip_tsx_create_uac2 declared in pjsip.h... " >&6; }
+
+	saved_cpp="$CPPFLAGS"
+	CPPFLAGS="$PJPROJECT_INCLUDE"
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pjsip.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "pjsip_tsx_create_uac2" >/dev/null 2>&1; then :
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+		PBX_PJ_TRANSACTION_GRP_LOCK=1
+
+$as_echo "#define HAVE_PJ_TRANSACTION_GRP_LOCK 1" >>confdefs.h
+
+
+else
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f conftest*
+
+
+	CPPGLAGS="$saved_cpp"
+	PJ_TRANSACTION_GRP_LOCK_INCLUDE="$PJPROJECT_INCLUDE"
+
+
+	PJSIP_REPLACE_MEDIA_STREAM_INCLUDE="$PJPROJECT_INCLUDE"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for PJMEDIA_SDP_NEG_ALLOW_MEDIA_CHANGE declared in pjmedia.h" >&5
+$as_echo_n "checking for PJMEDIA_SDP_NEG_ALLOW_MEDIA_CHANGE declared in pjmedia.h... " >&6; }
+
+	saved_cpp="$CPPFLAGS"
+	CPPFLAGS="$PJPROJECT_INCLUDE"
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pjmedia.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "PJMEDIA_SDP_NEG_ALLOW_MEDIA_CHANGE" >/dev/null 2>&1; then :
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+		PBX_PJSIP_REPLACE_MEDIA_STREAM=1
+
+$as_echo "#define HAVE_PJSIP_REPLACE_MEDIA_STREAM 1" >>confdefs.h
+
+
+else
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f conftest*
+
+
+	CPPGLAGS="$saved_cpp"
+	PJSIP_REPLACE_MEDIA_STREAM_INCLUDE="$PJPROJECT_INCLUDE"
+
+
+	PJSIP_GET_DEST_INFO_INCLUDE="$PJPROJECT_INCLUDE"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pjsip_get_dest_info declared in pjsip.h" >&5
+$as_echo_n "checking for pjsip_get_dest_info declared in pjsip.h... " >&6; }
+
+	saved_cpp="$CPPFLAGS"
+	CPPFLAGS="$PJPROJECT_INCLUDE"
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pjsip.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "pjsip_get_dest_info" >/dev/null 2>&1; then :
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+		PBX_PJSIP_GET_DEST_INFO=1
+
+$as_echo "#define HAVE_PJSIP_GET_DEST_INFO 1" >>confdefs.h
+
+
+else
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f conftest*
+
+
+	CPPGLAGS="$saved_cpp"
+	PJSIP_GET_DEST_INFO_INCLUDE="$PJPROJECT_INCLUDE"
+
+
+	PJ_SSL_CERT_LOAD_FROM_FILES2_INCLUDE="$PJPROJECT_INCLUDE"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pj_ssl_cert_load_from_files2 declared in pjlib.h" >&5
+$as_echo_n "checking for pj_ssl_cert_load_from_files2 declared in pjlib.h... " >&6; }
+
+	saved_cpp="$CPPFLAGS"
+	CPPFLAGS="$PJPROJECT_INCLUDE"
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pjlib.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "pj_ssl_cert_load_from_files2" >/dev/null 2>&1; then :
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+		PBX_PJ_SSL_CERT_LOAD_FROM_FILES2=1
+
+$as_echo "#define HAVE_PJ_SSL_CERT_LOAD_FROM_FILES2 1" >>confdefs.h
+
+
+else
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f conftest*
+
+
+	CPPGLAGS="$saved_cpp"
+	PJ_SSL_CERT_LOAD_FROM_FILES2_INCLUDE="$PJPROJECT_INCLUDE"
+
+
+	PJSIP_EXTERNAL_RESOLVER_INCLUDE="$PJPROJECT_INCLUDE"
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for pjsip_endpt_set_ext_resolver declared in pjsip.h" >&5
+$as_echo_n "checking for pjsip_endpt_set_ext_resolver declared in pjsip.h... " >&6; }
+
+	saved_cpp="$CPPFLAGS"
+	CPPFLAGS="$PJPROJECT_INCLUDE"
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+#include <pjsip.h>
+
+_ACEOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+  $EGREP "pjsip_endpt_set_ext_resolver" >/dev/null 2>&1; then :
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+		PBX_PJSIP_EXTERNAL_RESOLVER=1
+
+$as_echo "#define HAVE_PJSIP_EXTERNAL_RESOLVER 1" >>confdefs.h
+
+
+else
+
+		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+
+fi
+rm -f conftest*
+
+
+	CPPGLAGS="$saved_cpp"
+	PJSIP_EXTERNAL_RESOLVER_INCLUDE="$PJPROJECT_INCLUDE"
+
+
+   else
 
    if test "x${PBX_PJPROJECT}" != "x1" -a "${USE_PJPROJECT}" != "no"; then
 
@@ -24370,7 +24653,7 @@ if eval \${$as_ac_Lib+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpjsip ${pbxlibdir} $PJPROJECT_LIBS $LIBS"
+LIBS="-lpjsip ${pbxlibdir} $PJPROJECT_LIB $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -24412,7 +24695,7 @@ fi
 
    # now check for the header.
    if test "${AST_PJ_TRANSACTION_GRP_LOCK_FOUND}" = "yes"; then
-      PJ_TRANSACTION_GRP_LOCK_LIB="${pbxlibdir} -lpjsip $PJPROJECT_LIBS"
+      PJ_TRANSACTION_GRP_LOCK_LIB="${pbxlibdir} -lpjsip $PJPROJECT_LIB"
       # if --with-PJ_TRANSACTION_GRP_LOCK=DIR has been specified, use it.
       if test "x${PJ_TRANSACTION_GRP_LOCK_DIR}" != "x"; then
          PJ_TRANSACTION_GRP_LOCK_INCLUDE="-I${PJ_TRANSACTION_GRP_LOCK_DIR}/include"
@@ -24451,10 +24734,10 @@ fi
 
 
 
-saved_cppflags="${CPPFLAGS}"
-saved_libs="${LIBS}"
-CPPFLAGS="${CPPFLAGS} ${PJPROJECT_CFLAGS}"
-LIBS="${LIBS} ${PJPROJECT_LIBS}"
+      saved_cppflags="${CPPFLAGS}"
+      saved_libs="${LIBS}"
+      CPPFLAGS="${CPPFLAGS} ${PJPROJECT_CFLAGS}"
+      LIBS="${LIBS} ${PJPROJECT_LIB}"
 
     if test "x${PBX_PJSIP_REPLACE_MEDIA_STREAM}" != "x1" -a "${USE_PJSIP_REPLACE_MEDIA_STREAM}" != "no"; then
         if test "x" != "x"; then
@@ -24500,8 +24783,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 	CPPFLAGS="${saved_cppflags}"
     fi
 
-LIBS="${saved_libs}"
-CPPFLAGS="${saved_cppflags}"
+      LIBS="${saved_libs}"
+      CPPFLAGS="${saved_cppflags}"
 
 
 if test "x${PBX_PJSIP_GET_DEST_INFO}" != "x1" -a "${USE_PJSIP_GET_DEST_INFO}" != "no"; then
@@ -24527,7 +24810,7 @@ if eval \${$as_ac_Lib+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpjsip ${pbxlibdir} $PJPROJECT_LIBS $LIBS"
+LIBS="-lpjsip ${pbxlibdir} $PJPROJECT_LIB $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -24569,7 +24852,7 @@ fi
 
    # now check for the header.
    if test "${AST_PJSIP_GET_DEST_INFO_FOUND}" = "yes"; then
-      PJSIP_GET_DEST_INFO_LIB="${pbxlibdir} -lpjsip $PJPROJECT_LIBS"
+      PJSIP_GET_DEST_INFO_LIB="${pbxlibdir} -lpjsip $PJPROJECT_LIB"
       # if --with-PJSIP_GET_DEST_INFO=DIR has been specified, use it.
       if test "x${PJSIP_GET_DEST_INFO_DIR}" != "x"; then
          PJSIP_GET_DEST_INFO_INCLUDE="-I${PJSIP_GET_DEST_INFO_DIR}/include"
@@ -24618,7 +24901,7 @@ if test "x${PBX_PJ_SSL_CERT_LOAD_FROM_FILES2}" != "x1" -a "${USE_PJ_SSL_CERT_LOA
          pbxlibdir="-L${PJ_SSL_CERT_LOAD_FROM_FILES2_DIR}"
       fi
    fi
-   pbxfuncname="pj_ssl_cert_load_from_files2"
+   pbxfuncname="pjsip/include/pjsip/sip_util.h"
    if test "x${pbxfuncname}" = "x" ; then   # empty lib, assume only headers
       AST_PJ_SSL_CERT_LOAD_FROM_FILES2_FOUND=yes
    else
@@ -24631,7 +24914,7 @@ if eval \${$as_ac_Lib+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   ac_check_lib_save_LIBS=$LIBS
-LIBS="-lpj ${pbxlibdir} $PJPROJECT_LIBS $LIBS"
+LIBS="-lpj ${pbxlibdir} $PJPROJECT_LIB $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -24673,7 +24956,7 @@ fi
 
    # now check for the header.
    if test "${AST_PJ_SSL_CERT_LOAD_FROM_FILES2_FOUND}" = "yes"; then
-      PJ_SSL_CERT_LOAD_FROM_FILES2_LIB="${pbxlibdir} -lpj $PJPROJECT_LIBS"
+      PJ_SSL_CERT_LOAD_FROM_FILES2_LIB="${pbxlibdir} -lpj $PJPROJECT_LIB"
       # if --with-PJ_SSL_CERT_LOAD_FROM_FILES2=DIR has been specified, use it.
       if test "x${PJ_SSL_CERT_LOAD_FROM_FILES2_DIR}" != "x"; then
          PJ_SSL_CERT_LOAD_FROM_FILES2_INCLUDE="-I${PJ_SSL_CERT_LOAD_FROM_FILES2_DIR}/include"
@@ -24712,6 +24995,112 @@ fi
 
 
 
+if test "x${PBX_PJSIP_EXTERNAL_RESOLVER}" != "x1" -a "${USE_PJSIP_EXTERNAL_RESOLVER}" != "no"; then
+   pbxlibdir=""
+   # if --with-PJSIP_EXTERNAL_RESOLVER=DIR has been specified, use it.
+   if test "x${PJSIP_EXTERNAL_RESOLVER_DIR}" != "x"; then
+      if test -d ${PJSIP_EXTERNAL_RESOLVER_DIR}/lib; then
+         pbxlibdir="-L${PJSIP_EXTERNAL_RESOLVER_DIR}/lib"
+      else
+         pbxlibdir="-L${PJSIP_EXTERNAL_RESOLVER_DIR}"
+      fi
+   fi
+   pbxfuncname="pjsip_endpt_set_ext_resolver"
+   if test "x${pbxfuncname}" = "x" ; then   # empty lib, assume only headers
+      AST_PJSIP_EXTERNAL_RESOLVER_FOUND=yes
+   else
+      ast_ext_lib_check_save_CFLAGS="${CFLAGS}"
+      CFLAGS="${CFLAGS} $PJPROJECT_CFLAGS"
+      as_ac_Lib=`$as_echo "ac_cv_lib_pjsip_${pbxfuncname}" | $as_tr_sh`
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${pbxfuncname} in -lpjsip" >&5
+$as_echo_n "checking for ${pbxfuncname} in -lpjsip... " >&6; }
+if eval \${$as_ac_Lib+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lpjsip ${pbxlibdir} $PJPROJECT_LIBS $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char ${pbxfuncname} ();
+int
+main ()
+{
+return ${pbxfuncname} ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  eval "$as_ac_Lib=yes"
+else
+  eval "$as_ac_Lib=no"
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+eval ac_res=\$$as_ac_Lib
+	       { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
+$as_echo "$ac_res" >&6; }
+if eval test \"x\$"$as_ac_Lib"\" = x"yes"; then :
+  AST_PJSIP_EXTERNAL_RESOLVER_FOUND=yes
+else
+  AST_PJSIP_EXTERNAL_RESOLVER_FOUND=no
+fi
+
+      CFLAGS="${ast_ext_lib_check_save_CFLAGS}"
+   fi
+
+   # now check for the header.
+   if test "${AST_PJSIP_EXTERNAL_RESOLVER_FOUND}" = "yes"; then
+      PJSIP_EXTERNAL_RESOLVER_LIB="${pbxlibdir} -lpjsip $PJPROJECT_LIBS"
+      # if --with-PJSIP_EXTERNAL_RESOLVER=DIR has been specified, use it.
+      if test "x${PJSIP_EXTERNAL_RESOLVER_DIR}" != "x"; then
+         PJSIP_EXTERNAL_RESOLVER_INCLUDE="-I${PJSIP_EXTERNAL_RESOLVER_DIR}/include"
+      fi
+      PJSIP_EXTERNAL_RESOLVER_INCLUDE="${PJSIP_EXTERNAL_RESOLVER_INCLUDE} $PJPROJECT_CFLAGS"
+      if test "xpjsip.h" = "x" ; then	# no header, assume found
+         PJSIP_EXTERNAL_RESOLVER_HEADER_FOUND="1"
+      else				# check for the header
+         ast_ext_lib_check_saved_CPPFLAGS="${CPPFLAGS}"
+         CPPFLAGS="${CPPFLAGS} ${PJSIP_EXTERNAL_RESOLVER_INCLUDE}"
+         ac_fn_c_check_header_mongrel "$LINENO" "pjsip.h" "ac_cv_header_pjsip_h" "$ac_includes_default"
+if test "x$ac_cv_header_pjsip_h" = xyes; then :
+  PJSIP_EXTERNAL_RESOLVER_HEADER_FOUND=1
+else
+  PJSIP_EXTERNAL_RESOLVER_HEADER_FOUND=0
+fi
+
+
+         CPPFLAGS="${ast_ext_lib_check_saved_CPPFLAGS}"
+      fi
+      if test "x${PJSIP_EXTERNAL_RESOLVER_HEADER_FOUND}" = "x0" ; then
+         PJSIP_EXTERNAL_RESOLVER_LIB=""
+         PJSIP_EXTERNAL_RESOLVER_INCLUDE=""
+      else
+         if test "x${pbxfuncname}" = "x" ; then		# only checking headers -> no library
+            PJSIP_EXTERNAL_RESOLVER_LIB=""
+         fi
+         PBX_PJSIP_EXTERNAL_RESOLVER=1
+         cat >>confdefs.h <<_ACEOF
+#define HAVE_PJSIP_EXTERNAL_RESOLVER 1
+_ACEOF
+
+      fi
+   fi
+fi
+
+
+   fi
+fi
+
 
 if test "x${PBX_POPT}" != "x1" -a "${USE_POPT}" != "no"; then
    pbxlibdir=""