diff --git a/lcr.spec b/lcr.spec
index 0454cdc..e157857 100644
--- a/lcr.spec
+++ b/lcr.spec
@@ -1,5 +1,5 @@
 %global _version 2.1.4
-%global _release 5
+%global _release 6
 %global _inner_name isula_libutils
 %global enable_lxc 1
 
@@ -72,10 +72,14 @@ the libisula-devel package contains json, log and utils headers for developing p
 %build
 mkdir -p build
 cd build
+%if "%toolchain" == "clang"
+%global cmake_opts -DCMAKE_C_FLAGS="${CFLAGS}"
+%endif
+
 %if 0%{?enable_lxc}
-%cmake -DDEBUG=ON -DENABLE_LIBLCR=ON -DCMAKE_SKIP_RPATH=TRUE -DLIB_INSTALL_DIR=%{_libdir} ../
+%cmake -DDEBUG=ON -DENABLE_LIBLCR=ON -DCMAKE_SKIP_RPATH=TRUE -DLIB_INSTALL_DIR=%{_libdir} %{?cmake_opts} ../
 %else
-%cmake -DDEBUG=ON -DENABLE_LIBLCR=OFF -DCMAKE_SKIP_RPATH=TRUE -DLIB_INSTALL_DIR=%{_libdir} ../
+%cmake -DDEBUG=ON -DENABLE_LIBLCR=OFF -DCMAKE_SKIP_RPATH=TRUE -DLIB_INSTALL_DIR=%{_libdir} %{?cmake_opts} ../
 %endif
 %make_build
 
@@ -137,6 +141,12 @@ rm -rf %{buildroot}
 %{_includedir}/lcr/utils_compile.h
 
 %changelog
+* Fri Apr 12 2024 luofeng<luofeng13@huawei.com> - 2.1.4-6
+- Type:enhancement
+- CVE:NA
+- SUG:NA
+- DESC:support clang build
+
 * Thu Apr 11 2024 jikai<jikai11@huawei.com> - 2.1.4-5
 - Type:enhancement
 - CVE:NA