From 880d4aaf81f3d5d7fbb915905c2e61b816a6a747 Mon Sep 17 00:00:00 2001 From: fanquake Date: Tue, 21 Jun 2022 10:44:40 +0100 Subject: [PATCH] build: use BOOST_NO_CXX98_FUNCTION_BASE to suppress warnings Boost conatiner_hash (included via functional -> multi_index) uses std::unary_function, which was deprecated in C++11, and "removed" in C++17. It's use causes wanrings with newer compilers, i.e GCC 12.1. ```bash /bitcoin/depends/aarch64-unknown-linux-gnu/include/boost/container_hash/hash.hpp:131:33: warning: 'template struct std::unary_function' is deprecated [-Wdeprecated-declarations] 131 | struct hash_base : std::unary_function {}; | ^~~~~~~~~~~~~~ In file included from /usr/include/c++/12/bits/unique_ptr.h:37, from /usr/include/c++/12/memory:76, from ./init.h:10, from init.cpp:10: /usr/include/c++/12/bits/stl_function.h:117:12: note: declared here 117 | struct unary_function ``` Use the MACRO outlined in https://github.com/boostorg/container_hash/issues/22, to prevent it's use. BOOST_NO_CXX98_FUNCTION_BASE: > The standard library no longer supports std::unary_function and std::binary_function. > They were deprecated in C++11 and is removed from C++14. See: https://github.com/boostorg/config/pull/430 https://en.cppreference.com/w/cpp/utility/functional/unary_function https://www.boost.org/doc/libs/master/libs/config/doc/html/boost_config/boost_macro_reference.html --- configure.ac | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/configure.ac b/configure.ac index 682923096d0..0e1968f5c47 100644 --- a/configure.ac +++ b/configure.ac @@ -1461,6 +1461,11 @@ if test "$use_boost" = "yes"; then dnl we don't use multi_index serialization BOOST_CPPFLAGS="$BOOST_CPPFLAGS -DBOOST_MULTI_INDEX_DISABLE_SERIALIZATION" + dnl Prevent use of std::unary_function, which was removed in C++17, + dnl and will generate warnings with newer compilers. + dnl See: https://github.com/boostorg/container_hash/issues/22. + BOOST_CPPFLAGS="$BOOST_CPPFLAGS -DBOOST_NO_CXX98_FUNCTION_BASE" + if test "$enable_debug" = "yes" || test "$enable_fuzz" = "yes"; then BOOST_CPPFLAGS="$BOOST_CPPFLAGS -DBOOST_MULTI_INDEX_ENABLE_SAFE_MODE" fi