diff --git a/external/boost/0001-Add-a-comma-before-ellipsis-in-constexpr_swap.patch.2 b/external/boost/0001-Add-a-comma-before-ellipsis-in-constexpr_swap.patch.2
new file mode 100644
index 000000000000..3c3c8755fbfa
--- /dev/null
+++ b/external/boost/0001-Add-a-comma-before-ellipsis-in-constexpr_swap.patch.2
@@ -0,0 +1,28 @@
+From 2dfe66886d71b9a341433ea8b6ff225cc07da80b Mon Sep 17 00:00:00 2001
+From: Andrey Semashev <andrey.semashev@gmail.com>
+Date: Mon, 2 Dec 2024 19:22:20 +0300
+Subject: Add a comma before ellipsis in constexpr_swap.
+
+gcc 15 complains that the comma is required before vararg ellipsis.
+
+Fixes https://github.com/boostorg/integer/issues/35.
+---
+ include/boost/integer/common_factor_rt.hpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/include/boost/integer/common_factor_rt.hpp b/include/boost/integer/common_factor_rt.hpp
+index d6765d4..817682f 100644
+--- a/include/boost/integer/common_factor_rt.hpp
++++ b/include/boost/integer/common_factor_rt.hpp
+@@ -64,7 +64,7 @@ namespace boost {
+             return a.swap(b);
+          }
+          template <class T, class U>
+-         inline constexpr void constexpr_swap(T&a, U& b...) BOOST_GCD_NOEXCEPT(T)
++         inline constexpr void constexpr_swap(T& a, U& b, ...) BOOST_GCD_NOEXCEPT(T)
+          {
+             T t(static_cast<T&&>(a));
+             a = static_cast<T&&>(b);
+-- 
+2.47.1
+
diff --git a/external/boost/0001-Avoid-Wdeprecated-variadic-comma-omission-with-GCC-1.patch.2 b/external/boost/0001-Avoid-Wdeprecated-variadic-comma-omission-with-GCC-1.patch.2
new file mode 100644
index 000000000000..e7ebc6e18b62
--- /dev/null
+++ b/external/boost/0001-Avoid-Wdeprecated-variadic-comma-omission-with-GCC-1.patch.2
@@ -0,0 +1,38 @@
+From aa25af1928cc275537276c1a50e6ba49333a3aec Mon Sep 17 00:00:00 2001
+From: Stephan Bergmann <stephan.bergmann@allotropia.de>
+Date: Mon, 2 Dec 2024 19:06:25 +0100
+Subject: Avoid -Wdeprecated-variadic-comma-omission with GCC 15 trunk
+ -std=c++26
+
+...since
+<https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=cc67d95dc100706ea665e8cce581d59466aba62e>
+"c++: Implement C++26 P3176R1 - The Oxford variadic comma"
+---
+ include/boost/move/detail/unique_ptr_meta_utils.hpp | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/include/boost/move/detail/unique_ptr_meta_utils.hpp b/include/boost/move/detail/unique_ptr_meta_utils.hpp
+index 4c6aeb5..27154e0 100644
+--- a/include/boost/move/detail/unique_ptr_meta_utils.hpp
++++ b/include/boost/move/detail/unique_ptr_meta_utils.hpp
+@@ -497,7 +497,7 @@ struct is_unary_function_impl<R (*)(T0)>
+ {  static const bool value = true;  };
+ 
+ template <typename R, class T0>
+-struct is_unary_function_impl<R (*)(T0...)>
++struct is_unary_function_impl<R (*)(T0, ...)>
+ {  static const bool value = true;  };
+ 
+ #else // BOOST_MOVE_TT_TEST_MSC_FUNC_SIGS
+@@ -519,7 +519,7 @@ struct is_unary_function_impl<R (__cdecl*)(T0)>
+ {  static const bool value = true;  };
+ 
+ template <typename R, class T0>
+-struct is_unary_function_impl<R (__cdecl*)(T0...)>
++struct is_unary_function_impl<R (__cdecl*)(T0, ...)>
+ {  static const bool value = true;  };
+ 
+ #endif
+-- 
+2.47.1
+
diff --git a/external/boost/UnpackedTarball_boost.mk b/external/boost/UnpackedTarball_boost.mk
index 23b9a3c23dc8..3a8033bbea1e 100644
--- a/external/boost/UnpackedTarball_boost.mk
+++ b/external/boost/UnpackedTarball_boost.mk
@@ -36,6 +36,12 @@ boost_patches += Wundef.patch.0
 
 boost_patches += boost.spirit.noreturn.patch
 
+boost_patches += 0001-Add-a-comma-before-ellipsis-in-constexpr_swap.patch.2
+
+# Sent upstream as <https://github.com/boostorg/move/pull/58> "Avoid
+# -Wdeprecated-variadic-comma-omission with GCC 15 trunk -std=c++26":
+boost_patches += 0001-Avoid-Wdeprecated-variadic-comma-omission-with-GCC-1.patch.2
+
 $(eval $(call gb_UnpackedTarball_UnpackedTarball,boost))
 
 $(eval $(call gb_UnpackedTarball_set_tarball,boost,$(BOOST_TARBALL)))