diff --git a/b2-5.0.0-Define-OSPLAT-for-riscv64-and-riscv32-341.patch b/b2-5.0.0-Define-OSPLAT-for-riscv64-and-riscv32-341.patch
new file mode 100644
index 0000000000000000000000000000000000000000..10adf00540651b02d15e8383d1b9da3555b62bac
--- /dev/null
+++ b/b2-5.0.0-Define-OSPLAT-for-riscv64-and-riscv32-341.patch
@@ -0,0 +1,38 @@
+From b4c09d1b0fea7f0e31e54317523c26c0490996c3 Mon Sep 17 00:00:00 2001
+From: Levi Zim <rsworktech@outlook.com>
+Date: Sat, 2 Dec 2023 03:23:14 +0800
+Subject: [PATCH] Define OSPLAT for riscv64 and riscv32 (#341)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+* src/engine/jam.h
+    define OSPLAT for riscv64 and riscv32
+
+Co-authored-by: René Ferdinand Rivera Morell <grafikrobot@gmail.com>
+---
+ src/engine/jam.h | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/tools/build/src/engine/jam.h b/tools/build/src/engine/jam.h
+index e1b76cb04ad3..4e8ffa6420ca 100644
+--- a/tools/build/src/engine/jam.h
++++ b/tools/build/src/engine/jam.h
+@@ -442,6 +442,14 @@
+     #define OSPLAT "OSPLAT=PARISC"
+ #endif
+ 
++#if defined( __riscv ) || defined( __riscv__ )
++  #if __riscv_xlen == 64
++    #define OSPLAT "OSPLAT=RISCV64"
++  #elif __riscv_xlen == 32
++    #define OSPLAT "OSPLAT=RISCV32"
++  #endif
++#endif
++
+ #ifndef OSPLAT
+     #define OSPLAT ""
+ #endif
+-- 
+2.43.0
+
diff --git a/boost.spec b/boost.spec
index c047ec004c66d9fb11dcd89fc7f5e7239ecedc22..d977c257b227651573df0f140903e7a02d045abe 100644
--- a/boost.spec
+++ b/boost.spec
@@ -2,7 +2,7 @@
 
 Name:           boost
 Version:        1.83.0
-Release:        6
+Release:        7
 Summary:        The free peer-reviewed portable C++ source libraries
 License:        BSL-1.0
 URL:            https://www.boost.org
@@ -20,6 +20,8 @@ Patch4: boost-1.81-random-test-Add-missing-includes.patch
 Patch5: boost-1.81-phoenix-Update-avoid-placeholders-uarg1.10-ODR-violates.patch
 # https://lists.boost.org/Archives/boost/2020/04/248812.php
 Patch6: boost-1.73.0-cmakedir.patch
+# https://github.com/bfgroup/b2/pull/341
+Patch7: b2-5.0.0-Define-OSPLAT-for-riscv64-and-riscv32-341.patch
 
 Requires:       %{name}-atomic%{?_isa} = %{version}-%{release}
 Requires:       %{name}-chrono%{?_isa} = %{version}-%{release}
@@ -457,6 +459,9 @@ find libs -name example -exec cp {} boost-example --parents -r \;
 %{_libdir}/cmake/*
 
 %changelog
+* Tue Jul 29 2025 laokz <zhangkai@iscas.ac.cn> - 1.83.0-7
+- backport b2 patch to fix broken boost-context library on riscv
+
 * Thu Mar 06 2025 mahailiang <mahailiang@uniontech.com> - 1.83.0-6
 - Disable libquadmath dependency for sw_64 mips64el