Fix build with clang-19 (and newer) for boost thread

Resolves: RHEL-154173

boost-1.75-fix-no-member-named_that_error.patch

@@ -0,0 +1,24 @@
+From 49ccf9c30a0ca556873dbf64b12b0d741d1b3e66 Mon Sep 17 00:00:00 2001
+From: Arvid Norlander <arvid-norlander@users.noreply.github.com>
+Date: Fri, 8 Nov 2024 16:48:43 +0100
+Subject: [PATCH] Fix build on clang-19 (which checks more things in
+ uninstantiated templates)
+
+Fixes issue #402
+---
+ include/boost/thread/future.hpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/include/boost/thread/future.hpp b/include/boost/thread/future.hpp
+index 00f504b9b..d15d7ffa5 100644
+--- a/boost/thread/future.hpp
++++ b/boost/thread/future.hpp
+@@ -4668,7 +4668,7 @@ namespace detail
+       }
+       run_it& operator=(BOOST_THREAD_RV_REF(run_it) x) BOOST_NOEXCEPT {
+         if (this != &x) {
+-          that_=x.that;
++          that_=x.that_;
+           x.that_.reset();
+         }
+         return *this;

boost.spec

@@ -42,7 +42,7 @@ Name: boost
 %global real_name boost
 Summary: The free peer-reviewed portable C++ source libraries
 Version: 1.75.0
-Release: 13%{?dist}
+Release: 14%{?dist}
 License: Boost and MIT and Python
 
 # Replace each . with _ in %%{version}
@@ -169,6 +169,10 @@ Patch99: boost-1.75.0-copy_file-exdev.patch
 # https://github.com/boostorg/json/issues/717
 Patch100: boost-1.75.0-json-endian.patch
 
+# https://redhat.atlassian.net/browse/RHEL-154173
+# https://github.com/boostorg/thread/pull/408
+Patch101: boost-1.75-fix-no-member-named_that_error.patch
+
 %bcond_with tests
 %bcond_with docs_generated
 
@@ -696,6 +700,7 @@ find ./boost -name '*.hpp' -perm /111 | xargs chmod a-x
 %patch -P98 -p1
 %patch -P99 -p1
 %patch -P100 -p1
+%patch -P101 -p1
 
 %build
 %set_build_flags
@@ -1301,6 +1306,10 @@ fi
 %{_mandir}/man1/b2.1*
 
 %changelog
+* Fri Apr 17 2026 Patrick Palka <ppalka@redhat.com> - 1.75.0-14
+- Backport patch to fix build of boost thread on Clang19 and later
+  Resolves: RHEL-154173
+
 * Thu Oct 9 2025 Patrick Palka <ppalka@redhat.com> - 1.75.0-13
 - Add Boost.JSON patch for detecting endianness (RHEL-116553)