diff --git a/libdb.spec b/libdb.spec
index 483e03919de2d67d3257853caf86c97483e17b48..5484ac584a53e88eb8007c32060a5ed46bb90138 100644
--- a/libdb.spec
+++ b/libdb.spec
@@ -1,6 +1,6 @@
 Name:		libdb
 Version:	5.3.28
-Release:	41
+Release:	42
 Summary:	The Berkeley DB database library for C
 License:	BSD and LGPLv2 and Sleepycat
 URL:		https://www.oracle.com/database/berkeley-db/
@@ -40,6 +40,7 @@ patch40:        libdb-cbd-race.patch
 Patch41:        fix-a-potential-infinite-loop.patch
 Patch42:        add-check-for-device-number-in-__check_lock_fn.patch
 Patch43:        db-5.3.28-sw.patch
+patch44:        support-clang-build.patch
 
 BuildRequires:	gcc gcc-c++ perl-interpreter libtool tcl-devel >= 8.5.2-3 
 BuildRequires:  java-1.8.0-openjdk-devel chrpath zlib-devel
@@ -124,7 +125,7 @@ popd
 %ifarch sw_64
 %patch43 -p1
 %endif
-
+%patch44 -p1
 
 pushd dist
 ./s_config
@@ -217,6 +218,9 @@ mv man/* %{buildroot}%{_mandir}/man1/
 %{_mandir}/man1
 
 %changelog
+* Fri Mar 22 2024 luofeng <luofeng13@huawei.com> - 5.3.28-42
+- support clang build
+
 * Wed Oct 19 2022 wuzx<wuzx1226@qq.com> - 5.3.28-41
 - add sw64 patch
 
diff --git a/support-clang-build.patch b/support-clang-build.patch
new file mode 100644
index 0000000000000000000000000000000000000000..0cbb539c22c1d3d3b0696279a30311d0ba659aca
--- /dev/null
+++ b/support-clang-build.patch
@@ -0,0 +1,33 @@
+From ba70232521c53b4f32733ba023b82157e6de6cdd Mon Sep 17 00:00:00 2001
+From: luofeng <luofeng13@huawei.com>
+Date: Thu, 21 Mar 2024 21:00:42 +0800
+Subject: [PATCH] support clang build
+
+---
+ db.1.85/PORT/Makefile       | 2 +-
+ db.1.85/PORT/linux/Makefile | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/db.1.85/PORT/Makefile b/db.1.85/PORT/Makefile
+index 383b259..fc7518e 100644
+--- a/db.1.85/PORT/Makefile
++++ b/db.1.85/PORT/Makefile
+@@ -99,4 +99,4 @@ memmove.o:
+ mktemp.o:
+ 	${CC} -c -O -I. -Iinclude clib/mktemp.c
+ snprintf.o:
+-	${CC} -c -O -I. -Iinclude clib/snprintf.c
++	${CC} -c $(CFLAGS) -O -I. -Iinclude clib/snprintf.c
+diff --git a/db.1.85/PORT/linux/Makefile b/db.1.85/PORT/linux/Makefile
+index 40b7c55..6a70e2c 100644
+--- a/db.1.85/PORT/linux/Makefile
++++ b/db.1.85/PORT/linux/Makefile
+@@ -98,4 +98,4 @@ memmove.o:
+ mktemp.o:
+ 	${CC} -c -O -I. -Iinclude clib/mktemp.c
+ snprintf.o:
+-	${CC} -c -O -I. -Iinclude clib/snprintf.c
++	${CC} -c $(CFLAGS) -O -I. -Iinclude clib/snprintf.c
+-- 
+2.19.1
+