From e20d83622478d8ca509596afc0c1899975738ea6 Mon Sep 17 00:00:00 2001
From: laokz <zhangkai@iscas.ac.cn>
Date: Tue, 29 Jul 2025 14:54:33 +0800
Subject: [PATCH] backport b2 patch to fix broken boost-context library on
 riscv

Subpackage boost-context generated broken .so which has incompleted
symbols.

This patch is from upstream b2 5.0.0.

https://github.com/bfgroup/b2/issues/340
https://github.com/bfgroup/b2/pull/341
(cherry picked from commit 64655eb81d1d93d8e5aafddda5595df22a746d57)
---
 ...e-OSPLAT-for-riscv64-and-riscv32-341.patch | 38 +++++++++++++++++++
 boost.spec                                    |  7 +++-
 2 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 b2-5.0.0-Define-OSPLAT-for-riscv64-and-riscv32-341.patch

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 0000000..10adf00
--- /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 f63a708..8c59e93 100644
--- a/boost.spec
+++ b/boost.spec
@@ -2,7 +2,7 @@
 
 Name:           boost
 Version:        1.83.0
-Release:        8
+Release:        9
 Summary:        The free peer-reviewed portable C++ source libraries
 License:        BSL-1.0
 URL:            https://www.boost.org
@@ -27,6 +27,8 @@ Patch7: boost-Support-numpy-2.0.0b1.patch
 Patch8: boost-Compare-pointers-directly-instead-of-using-PyArray_EquivTypes.patch
 # https://github.com/boostorg/thread/pull/408
 Patch9: boost-1.83-fix-no-member-named_that_error.patch
+# https://github.com/bfgroup/b2/pull/341
+Patch10: b2-5.0.0-Define-OSPLAT-for-riscv64-and-riscv32-341.patch
 
 Requires:       %{name}-atomic%{?_isa} = %{version}-%{release}
 Requires:       %{name}-chrono%{?_isa} = %{version}-%{release}
@@ -460,6 +462,9 @@ find libs -name example -exec cp {} boost-example --parents -r \;
 %{_libdir}/cmake/*
 
 %changelog
+* Tue Jul 29 2025 laokz <zhangkai@iscas.ac.cn> - 1.83.0-9
+- backport b2 patch to fix broken boost-context library on riscv
+
 * Thu Jun 19 2025 Funda Wang <fundawang@yeah.net> - 1.83.0-8
 - add more patch for numpy 2
 - fix build with clang 19
-- 
Gitee