generic "add LLVM_COMPAT 20 everywhere", untested

app-text/doxygen/metadata.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="person">
+		<email>tamiko@gentoo.org</email>
+		<name>Matthias Maier</name>
+	</maintainer>
+	<longdescription>
+		Doxygen is a tool for analyzing, documenting, and reverse-engineering
+		source code of various languages using a variety of output formats
+		(try it and see).  Doxygen supports C++, C, Java, Objective-C, Python,
+		IDL (Corba and Microsoft flavors) and to some extent PHP, C#, and D,
+		as well as other languages (using additional helper tools).
+	</longdescription>
+	<upstream>
+		<remote-id type="github">doxygen/doxygen</remote-id>
+		<remote-id type="sourceforge">doxygen</remote-id>
+	</upstream>
+	<use>
+		<flag name="clang">support for <pkg>llvm-core/clang</pkg> assisted parsing</flag>
+		<flag name="dot">allow to create dot graphs using <pkg>media-gfx/graphviz</pkg></flag>
+		<flag name="doxysearch">build doxyindexer and doxysearch.cgi</flag>
+	</use>
+</pkgmetadata>