diff --git a/gcc.spec b/gcc.spec
index 92d7555b7848c13237f7fbb94875ecaa666e7712..55b5fd7999e88ae9907888522b4bd46f16da66af 100644
--- a/gcc.spec
+++ b/gcc.spec
@@ -2,7 +2,7 @@
 %define debug_package %{nil}
 
 %global gcc_version 7.3.0
-%global isl_version 0.14
+%global isl_version 0.21
 %global cloog_version 0.18.4
 
 %define compat_gcc_provides 7777777
@@ -26,7 +26,7 @@
 %global build_libatomic 1
 %global build_libitm 1
 %global attr_ifunc 1
-%global build_cloog 1
+%global build_cloog 0
 %global build_libstdcxx_docs 0
 %global build_java_tar 0
 %global build_libtsan 1
@@ -37,7 +37,7 @@
 Summary: Various compilers (C, C++, Objective-C, Java, ...)
 Name: gcc
 Version: 7.3.0
-Release: %{DATE}.39
+Release: %{DATE}.40
 License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions and LGPLv2+ and BSD
 Group: Development/Languages
 URL: https://gcc.gnu.org
@@ -674,6 +674,7 @@ make %{?_smp_mflags}
 make %{?_smp_mflags} install
 cd ..
 
+%if %{build_cloog}
 mkdir cloog-build cloog-install
 cd cloog-build
 cat >> ../../cloog-%{cloog_version}/source/isl/constraints.c << \EOF
@@ -698,6 +699,7 @@ cd ../cloog-install/lib
 ln -sf libcloog-isl.so.4 libcloog-isl.so
 ln -sf libcloog-isl.so.4 libcloog.so
 cd ../..
+%endif
 
 #test don't build
 %if 1 
@@ -764,7 +766,7 @@ CC="$CC" CFLAGS="$OPT_FLAGS" \
          --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions \
          --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu \
          --enable-languages=c,c++,objc,obj-c++,fortran,lto --enable-plugin \
-         --enable-initfini-array --disable-libgcj --without-isl --without-cloog \
+         --enable-initfini-array --disable-libgcj --with-isl=`cd isl-install;pwd` --without-cloog \
          --enable-gnu-indirect-function --build=%{gcc_target_platform} \
          --with-stage1-ldflags="$OPT_LDFLAGS" \
          --with-boot-ldflags="$OPT_LDFLAGS" \
@@ -3291,6 +3293,10 @@ fi
 
 
 %changelog
+* Wed Jul 7 2021 jiangchuangang <jiangchuangang@huawei.com> - 7.3.0-20210605.40
+- isl-0.21.tar.bz2: New file
+- gcc.spec: update isl version and and --with-isl
+
 * Sat Jun 05 2021 dingguangya <dingguangya1@huawei.com> - 7.3.0-20210605.39
 - fix-pre-improve-fake-exit-edge-placement.patch: New file
 - gcc.spec: Add new patch
diff --git a/isl-0.14.tar.xz b/isl-0.14.tar.xz
deleted file mode 100644
index 823478eeabef35afb19b9ebea047dd34c09694cb..0000000000000000000000000000000000000000
Binary files a/isl-0.14.tar.xz and /dev/null differ
diff --git a/isl-0.21.tar.bz2 b/isl-0.21.tar.bz2
new file mode 100644
index 0000000000000000000000000000000000000000..1b256e26d304a8a3f3b656886f5ecb4852d4a0f8
Binary files /dev/null and b/isl-0.21.tar.bz2 differ