Github user alanconway commented on a diff in the pull request:
https://github.com/apache/qpid-proton/pull/35#discussion_r31842586
--- Diff: CMakeLists.txt ---
@@ -20,16 +20,15 @@ cmake_minimum_required (VERSION 2.6)
project (Proton C)
+# Enable C++ now for examples and bindings subdirectories, but make it
optional.
+enable_language(CXX OPTIONAL)
+
--- End diff --
enable_language(CXX OPTIONAL) enables cmake support for C++ if it is
available. I had to move it up from proton-c because CMake requires you do this
above any subdirs that will use it (now examples and proton-c). The next block
just decides whether or not to use C++ for building proton. The C++ binding is
default enabled if C++ is available (checks CXX_COMPILER), and can explicitly
enabled/disabled with BUILD_CPP like all other bindings.
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