ports/devel/boost/patches/patch-boost_config_stdlib_libcpp_hpp

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The std lib unary/binary_function base classes are deprecated/removed from libcpp15.
https://github.com/boostorg/container_hash/issues/24
Index: boost/config/stdlib/libcpp.hpp
--- boost/config/stdlib/libcpp.hpp.orig
+++ boost/config/stdlib/libcpp.hpp
@@ -168,4 +168,13 @@
# define BOOST_NO_CXX14_HDR_SHARED_MUTEX
#endif
+#if _LIBCPP_VERSION >= 15000
+//
+// Unary function is now deprecated in C++11 and later:
+//
+#if __cplusplus >= 201103L
+#define BOOST_NO_CXX98_FUNCTION_BASE
+#endif
+#endif
+
// --- end ---