Prevent compile from failing due to mod-shout using deprecated libshout
declarations.

---

--- a/configure.ac
+++ b/configure.ac
@@ -373,8 +373,20 @@ if test "$ax_cv_c_compiler_vendor" = "gn
         [ac_cv_gcc_supports_w_no_err_format_truncation=no])])
   CFLAGS="$saved_CFLAGS"
   AC_MSG_RESULT($ac_cv_gcc_supports_w_no_err_format_truncation)
+
+  saved_CFLAGS="$CFLAGS"
+  AC_CACHE_CHECK([whether compiler supports -Wno-error=deprecated-declarations],
+    [ac_cv_gcc_supports_w_no_err_deprecated_declarations], [
+      CFLAGS="$CFLAGS -Wno-error=deprecated-declarations"
+      AC_TRY_COMPILE([],[return 0;],
+        [ac_cv_gcc_supports_w_no_err_deprecated_declarations=yes],
+        [ac_cv_gcc_supports_w_no_err_deprecated_declarations=no])])
+  CFLAGS="$saved_CFLAGS"
+  AC_MSG_RESULT($ac_cv_gcc_supports_w_no_err_deprecated_declarations)
 fi
 
+AM_CONDITIONAL([W_NO_ERR_DEPRECATED_DECLARATIONS], [test x$ac_cv_gcc_supports_w_no_err_deprecated_declarations = xyes])
+
 # tweak compiler specific flags
 if test "x${ax_cv_c_compiler_vendor}"  =  "xsun" ; then
     APR_ADDTO(SWITCH_AM_CFLAGS, -KPIC)
--- a/src/mod/formats/mod_shout/Makefile.am
+++ b/src/mod/formats/mod_shout/Makefile.am
@@ -12,6 +12,10 @@ mod_shout_la_CPPFLAGS = $(CURL_CFLAGS) $
 mod_shout_la_LIBADD   = $(switch_builddir)/libfreeswitch.la
 mod_shout_la_LDFLAGS  = $(CURL_LIBS) -avoid-version -module -no-undefined -shared $(SHOUT_LIBS) $(MP3LAME_LIBS) $(MPG123_LIBS)
 
+if W_NO_ERR_DEPRECATED_DECLARATIONS
+mod_shout_la_CFLAGS   += -Wno-error=deprecated-declarations
+endif
+
 else
 install: error
 all: error