apply an errata patch to Boost, from Brad

devel/boost/Makefile

@@ -1,13 +1,15 @@
 NOT_FOR_ARCHS-md = alpha hppa sparc64
 
+DPB_PROPERTIES=	parallel
+
 COMMENT-main=	free peer-reviewed portable C++ source libraries
 COMMENT-md=	machine-dependent libraries for boost
-REVISION-main=	0
 
 VERSION=	1.80.0
 EPOCH =		0
 DISTNAME=	boost_${VERSION:S/./_/g}
 PKGNAME=	boost-${VERSION}
+REVISION-main=	1
 CATEGORIES=	devel
 MASTER_SITES=	https://boostorg.jfrog.io/artifactory/main/release/${VERSION}/source/
 EXTRACT_SUFX=	.tar.bz2
@@ -121,8 +123,6 @@ CONFIGURE_STYLE= none
 CONFIGURE_ENV=	BJAM_CONFIG="${BJAM_CONFIG}" \
 		CXX="${CXX}" CXXFLAGS="${CXXFLAGS}"
 
-DPB_PROPERTIES= parallel
-
 NO_TEST=	Yes
 
 SUBST_VARS+=	SO_VERSION

devel/boost/patches/patch-boost_config_stdlib_libcpp_hpp

@@ -0,0 +1,20 @@
+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 ---