Patch Boost.Format for C++20 compatibility with GCC 10 (#1818723)

boost-1.69-format-allocator.patch

@@ -0,0 +1,28 @@
+--- boost_1_69_0/boost/format/alt_sstream_impl.hpp~	2020-03-30 15:20:18.565658757 +0100
++++ boost_1_69_0/boost/format/alt_sstream_impl.hpp	2020-03-30 15:20:33.768636162 +0100
+@@ -40,8 +40,11 @@
+ #ifdef _RWSTD_NO_CLASS_PARTIAL_SPEC
+                 void *vd_ptr = alloc_.allocate(sz, is_allocated_? eback() : 0);
+                 Ch *new_ptr = static_cast<Ch *>(vd_ptr);
+-#else
++#elif defined BOOST_NO_CXX11_ALLOCATOR
+                 Ch *new_ptr = alloc_.allocate(sz, is_allocated_? eback() : 0);
++#else
++                Ch *new_ptr = std::allocator_traits<compat_allocator_type>::allocate(alloc_,
++                    sz, is_allocated_? eback() : 0);
+ #endif
+                 // if this didnt throw, we're safe, update the buffer
+                 dealloc();
+@@ -257,8 +260,11 @@
+ #ifdef _RWSTD_NO_CLASS_PARTIAL_SPEC
+                     void *vdptr = alloc_.allocate(new_size, is_allocated_? oldptr : 0);
+                     newptr = static_cast<Ch *>(vdptr);
+-#else
++#elif defined BOOST_NO_CXX11_ALLOCATOR
+                     newptr = alloc_.allocate(new_size, is_allocated_? oldptr : 0);
++#else
++                    newptr = std::allocator_traits<compat_allocator_type>::allocate(alloc_,
++                        new_size, is_allocated_? oldptr : 0);
+ #endif
+                 }
+ 

boost.spec

@@ -45,7 +45,7 @@ Summary: The free peer-reviewed portable C++ source libraries
 Version: 1.69.0
 %global version_enc 1_69_0
 %global version_suffix 169
-Release: 8%{?dist}
+Release: 9%{?dist}
 License: Boost and MIT and Python
 
 %global toplev_dirname %{real_name}_%{version_enc}
@@ -152,6 +152,9 @@ Patch84: boost-1.69-random.patch
 # https://github.com/boostorg/mpi/pull/81
 Patch85: boost-1.69-mpi-c_data.patch
 
+# https://bugzilla.redhat.com/show_bug.cgi?id=1818723
+Patch86: boost-1.69-format-allocator.patch
+
 %bcond_with tests
 %bcond_with docs_generated
 
@@ -761,6 +764,7 @@ find ./boost -name '*.hpp' -perm /111 | xargs chmod a-x
 %patch83 -p1
 %patch84 -p2
 %patch85 -p2
+%patch86 -p1
 
 %build
 # Dump the versions being used into the build logs.
@@ -1483,6 +1487,9 @@ fi
 %{_mandir}/man1/bjam.1*
 
 %changelog
+* Mon Mar 30 2020 Jonathan Wakely <jwakely@redhat.com> - 1.69.0-9
+- Patch Boost.Format for C++20 compatibility with GCC 10 (#1818723)
+
 * Fri May 10 2019 Jonathan Wakely <jwakely@redhat.com> - 1.69.0-8
 - Fix Obsoletes tag to remove _isa (#1706079)