diff --git a/strace.spec b/strace.spec
index f064368b882c13cc863d80d7733d200db3583f7c..0be9672aff6b4859fa36031dc15f2681fd0b6d57 100644
--- a/strace.spec
+++ b/strace.spec
@@ -1,7 +1,7 @@
 Summary: Tracks and displays system calls associated with a running process
 Name: strace
 Version: 6.6
-Release: 1
+Release: 2
 # The test suite is GPLv2+, all the rest is LGPLv2.1+.
 License: LGPL-2.1+ and GPL-2.0+
 # Some distros require Group tag to be present,
@@ -73,6 +73,9 @@ echo 'END OF BUILD ENVIRONMENT INFORMATION'
 
 export CC_FOR_BUILD="$CC";
 CFLAGS_FOR_BUILD="$RPM_OPT_FLAGS"; export CFLAGS_FOR_BUILD
+%if "%{?toolchain}" == "clang"
+    CFLAGS="${CFLAGS:-%{?build_cflags}} -Wno-error=deprecated-non-prototype -Wno-error=unused-function"; export CFLAGS;
+%endif
 %configure --enable-mpers=check
 %make_build
 
@@ -112,6 +115,9 @@ wait
 %{_mandir}/man1/*
 
 %changelog
+* Thu Feb 22 2024 luofeng <luofeng13@huawei.com> - 6.6-2
+- support clang build
+
 * Fri Jan 19 2024 liuchao <liuchao173@huawei.com> - 6.6-1
 - update to 6.6 to fix compile error with kernel 6.6