build: raise minimum build requirements
* Make gcc 7.4 and boost 1.65.1 hard dependencies, both are
available out-of-the-box on Ubuntu 18.04
* Require Xcode 10 on macOS but recommend 11.3 or later
* If using clang on non-Apple platforms, the minimum supported
version is now 6.0
Change-Id: I79c84a266741c9a66655da4fd467fe0d8218e8f0
diff --git a/docs/doxygen.conf.in b/docs/doxygen.conf.in
index 82513e4..5c857c5 100644
--- a/docs/doxygen.conf.in
+++ b/docs/doxygen.conf.in
@@ -774,7 +774,7 @@
# spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
# Note: If this tag is empty the current directory is searched.
-INPUT = ndn-cxx
+INPUT = ndn-cxx build/ndn-cxx/version.hpp
# This tag can be used to specify the character encoding of the source files
# that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses