[Build-System] Update libsrtp to 2.4.0

libs/srtp/doc/Doxyfile.in

@@ -38,7 +38,7 @@ PROJECT_NAME           = libSRTP
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = LIBSRTPVERSIONNUMBER
+PROJECT_NUMBER         = @LIBSRTPVERSIONNUMBER@
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a

libs/srtp/doc/Makefile.in

@@ -21,7 +21,7 @@ libsrtpdoc:
 	@if test ! -e Doxyfile.in; then \
 		echo "*** Sorry, can't build doc outside source dir"; exit 1; \
 	fi
-	sed 's/LIBSRTPVERSIONNUMBER/$(version)/' Doxyfile.in > Doxyfile
+	sed 's/@LIBSRTPVERSIONNUMBER@/$(version)/' Doxyfile.in > Doxyfile
 	doxygen
 
 clean:

libs/srtp/doc/meson.build

@@ -0,0 +1,22 @@
+# libSRTP documentation
+
+doxygen = find_program('doxygen', required: get_option('doc'))
+
+if not doxygen.found()
+  subdir_done()
+endif
+
+doc_config = configuration_data()
+doc_config.set('LIBSRTPVERSIONNUMBER', meson.project_version())
+
+doxyfile = configure_file(input: 'Doxyfile.in',
+  output: 'Doxyfile',
+  configuration: doc_config)
+
+# can be built on demand with ninja -C builddir doc/html
+doxygen_html_docs = custom_target('doc',
+  build_by_default: false,
+  command: [doxygen, doxyfile],
+  output: ['html'])
+
+alias_target('libsrtp2doc', doxygen_html_docs)