build: regenerate configure file
diff --git a/configure b/configure
index 18c7a16..895e8cd 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,8 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69.
+# Generated by GNU Autoconf 2.69 for libsrtp 1.4.5.
+#
+# Report bugs to <https://github.com/cisco/libsrtp/issues>.
 #
 #
 # Copyright (C) 1992-1996, 1998-2012 Free Software Foundation, Inc.
@@ -264,8 +266,9 @@
     $as_echo "$0: In particular, zsh $ZSH_VERSION has bugs and should"
     $as_echo "$0: be upgraded to zsh 4.3.4 or later."
   else
-    $as_echo "$0: Please tell bug-autoconf@gnu.org about your system,
-$0: including any error possibly output before this
+    $as_echo "$0: Please tell bug-autoconf@gnu.org and
+$0: https://github.com/cisco/libsrtp/issues about your
+$0: system, including any error possibly output before this
 $0: message. Then install a modern shell, or manually run
 $0: the script under such a shell if you do have one."
   fi
@@ -575,14 +578,13 @@
 MAKEFLAGS=
 
 # Identity of this package.
-PACKAGE_NAME=
-PACKAGE_TARNAME=
-PACKAGE_VERSION=
-PACKAGE_STRING=
-PACKAGE_BUGREPORT=
-PACKAGE_URL=
+PACKAGE_NAME='libsrtp'
+PACKAGE_TARNAME='libsrtp'
+PACKAGE_VERSION='1.4.5'
+PACKAGE_STRING='libsrtp 1.4.5'
+PACKAGE_BUGREPORT='https://github.com/cisco/libsrtp/issues'
+PACKAGE_URL=''
 
-ac_unique_file="srtp"
 # Factoring default headers for most tests.
 ac_includes_default="\
 #include <stdio.h>
@@ -621,6 +623,8 @@
 
 ac_subst_vars='LTLIBOBJS
 LIBOBJS
+HAVE_PKG_CONFIG
+PKG_CONFIG
 GDOI_OBJS
 HMAC_OBJS
 RNG_EXTRA_OBJS
@@ -749,7 +753,7 @@
 localstatedir='${prefix}/var'
 includedir='${prefix}/include'
 oldincludedir='/usr/include'
-docdir='${datarootdir}/doc/${PACKAGE}'
+docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
 infodir='${datarootdir}/info'
 htmldir='${docdir}'
 dvidir='${docdir}'
@@ -1249,7 +1253,7 @@
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures this package to adapt to many kinds of systems.
+\`configure' configures libsrtp 1.4.5 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1297,7 +1301,7 @@
   --infodir=DIR           info documentation [DATAROOTDIR/info]
   --localedir=DIR         locale-dependent data [DATAROOTDIR/locale]
   --mandir=DIR            man documentation [DATAROOTDIR/man]
-  --docdir=DIR            documentation root [DATAROOTDIR/doc/PACKAGE]
+  --docdir=DIR            documentation root [DATAROOTDIR/doc/libsrtp]
   --htmldir=DIR           html documentation [DOCDIR]
   --dvidir=DIR            dvi documentation [DOCDIR]
   --pdfdir=DIR            pdf documentation [DOCDIR]
@@ -1313,7 +1317,9 @@
 fi
 
 if test -n "$ac_init_help"; then
-
+  case $ac_init_help in
+     short | recursive ) echo "Configuration of libsrtp 1.4.5:";;
+   esac
   cat <<\_ACEOF
 
 Optional Features:
@@ -1342,7 +1348,7 @@
 Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
 
-Report bugs to the package provider.
+Report bugs to <https://github.com/cisco/libsrtp/issues>.
 _ACEOF
 ac_status=$?
 fi
@@ -1405,7 +1411,7 @@
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-configure
+libsrtp configure 1.4.5
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1637,6 +1643,10 @@
 $as_echo "$as_me: WARNING: $2:     section \"Present But Cannot Be Compiled\"" >&2;}
     { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: $2: proceeding with the compiler's result" >&5
 $as_echo "$as_me: WARNING: $2: proceeding with the compiler's result" >&2;}
+( $as_echo "## ------------------------------------------------------ ##
+## Report this to https://github.com/cisco/libsrtp/issues ##
+## ------------------------------------------------------ ##"
+     ) | sed "s/^/$as_me: WARNING:     /" >&2
     ;;
 esac
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
@@ -2007,7 +2017,7 @@
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by $as_me, which was
+It was created by libsrtp $as_me 1.4.5, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -5098,6 +5108,51 @@
 ac_config_headers="$ac_config_headers crypto/include/config.h:config_in.h"
 
 
+# Extract the first word of "pkg-config", so it can be a program name with args.
+set dummy pkg-config; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_PKG_CONFIG+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$PKG_CONFIG"; then
+  ac_cv_prog_PKG_CONFIG="$PKG_CONFIG" # Let the user override the test.
+else
+as_save_IFS=$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 '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_PKG_CONFIG="yes"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+PKG_CONFIG=$ac_cv_prog_PKG_CONFIG
+if test -n "$PKG_CONFIG"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
+$as_echo "$PKG_CONFIG" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+if test "x$PKG_CONFIG" != "x"; then
+    HAVE_PKG_CONFIG=1
+    ac_config_files="$ac_config_files libsrtp.pc"
+
+else
+    HAVE_PKG_CONFIG=0
+fi
+
 ac_config_files="$ac_config_files Makefile crypto/Makefile doc/Makefile"
 
 cat >confcache <<\_ACEOF
@@ -5607,7 +5662,7 @@
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by $as_me, which was
+This file was extended by libsrtp $as_me 1.4.5, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -5663,13 +5718,13 @@
 Configuration headers:
 $config_headers
 
-Report bugs to the package provider."
+Report bugs to <https://github.com/cisco/libsrtp/issues>."
 
 _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-config.status
+libsrtp config.status 1.4.5
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
@@ -5792,6 +5847,7 @@
 do
   case $ac_config_target in
     "crypto/include/config.h") CONFIG_HEADERS="$CONFIG_HEADERS crypto/include/config.h:config_in.h" ;;
+    "libsrtp.pc") CONFIG_FILES="$CONFIG_FILES libsrtp.pc" ;;
     "Makefile") CONFIG_FILES="$CONFIG_FILES Makefile" ;;
     "crypto/Makefile") CONFIG_FILES="$CONFIG_FILES crypto/Makefile" ;;
     "doc/Makefile") CONFIG_FILES="$CONFIG_FILES doc/Makefile" ;;