add -latomic flag to lockfree tests for riscv64

Boost does not implement atomic functions for RISC-V, and depend
that on compiler. For 16-byte atomic ops, the compiler must link
against libatomic.

boost.spec

@@ -2,7 +2,7 @@
 
 Name:           boost
 Version:        1.78.0
-Release:        16
+Release:        17
 Summary:        The free peer-reviewed portable C++ source libraries
 License:        Boost Software License 1.0
 URL:            http://www.boost.org
@@ -74,6 +74,9 @@ BuildRequires:  libquadmath-devel libquadmath-static
 BuildRequires:  python3-numpy
 # optional library for regex
 BuildRequires:  libicu-devel
+%ifarch riscv64
+BuildRequires:  libatomic
+%endif
 
 Obsoletes: boost-signals < 1.69.0
 
@@ -301,7 +304,12 @@ cd status
 ../b2 %{?_smp_mflags} %{opt_feature} cxxflags="$RPM_OPT_FLAGS" %{boost_macros} \
   --include-tests=algorithm,graph,intrusive,dynamic_bitset,property_map,crc,lexical_cast,range \
   --exclude-tests=mpi,graph_parallel
-../b2 %{?_smp_mflags} %{opt_feature} cxxflags="$RPM_OPT_FLAGS" %{boost_macros} \
+%ifarch riscv64
+LINKFLAGS='linkflags="-Wl,-latomic"'
+%else
+LINKFLAGS=
+%endif
+../b2 %{?_smp_mflags} %{opt_feature} cxxflags="$RPM_OPT_FLAGS" $LINKFLAGS %{boost_macros} \
   --include-tests=bimap,circular_buffer,container,heap,icl,lockfree,logic,multi_array,multi_index,poly_collection,property_tree,ptr_container,sort \
   --exclude-tests=container_hash
 
@@ -453,6 +461,9 @@ find libs -name example -exec cp {} boost-example --parents -r \;
 %{_libdir}/*.a
 
 %changelog
+* Mon Aug 14 2023 laokz <zhangkai@iscas.ac.cn> - 1.78.0-17
+- add -latomic flag to lockfree tests for riscv64
+
 * Thu Aug 10 2023 herengui <herengui@kylinsec.com.cn> - 1.78.0-16
 - add loongarch64 patch