diff --git a/gcc-12.spec b/gcc-12.spec
index a3517df..caace54 100644
--- a/gcc-12.spec
+++ b/gcc-12.spec
@@ -1,9 +1,6 @@
 %global scl 1
 
-%global gcc_version 12.2.1
 %global gcc_major 12
-%global gcc_release 4
-%global isl_version 0.18
 
 %global _unpackaged_files_terminate_build 0
 %global _performance_build 1
@@ -69,7 +66,6 @@
 %else
 %global build_libitm 0
 %endif
-%global build_isl 1
 %ifarch %{ix86} x86_64 ppc ppc64 ppc64le ppc64p7 s390 s390x %{arm} aarch64 %{mips}
 %global attr_ifunc 1
 %else
@@ -87,19 +83,18 @@
 
 Summary: Various compilers (C, C++, Objective-C, ...)
 Name: %{?scl_prefix}gcc
-Version: %{gcc_version}
-Release: %{gcc_release}
+Version: 12.2.1
+Release: 5
 # libgcc, libgfortran, libgomp, libstdc++ and crtstuff have
 # GCC Runtime Exception.
 License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions and LGPLv2+ and BSD
 Source0: https://ftp.gnu.org/gnu/gcc/gcc-12.2.0/gcc-12.2.0.tar.xz
-Source1: https://gcc.gnu.org/pub/gcc/infrastructure/isl-%{isl_version}.tar.bz2
 URL: http://gcc.gnu.org
 
 BuildRequires: binutils >= 2.31
 BuildRequires: glibc-headers
 BuildRequires: libtool, zlib-devel, texinfo, gettext, flex, bison, sharutils
-BuildRequires: gmp-devel >= 4.1.2, mpfr-devel >= 3.1.0, libmpc-devel >= 0.8.1
+BuildRequires: gmp-devel >= 4.1.2, mpfr-devel >= 3.1.0, libmpc-devel >= 0.8.1, isl-devel >= 0.15.0
 BuildRequires: gcc, gcc-c++, make
 BuildRequires: gdb
 BuildRequires: glibc-devel >= 2.17
@@ -593,11 +588,11 @@ not stable, so plugins must be rebuilt any time GCC is updated.
 
 
 %prep
-%setup -q -n gcc-12.2.0 -a 1
+%setup -q -n gcc-12.2.0
 
 %patch0 -p1
 
-echo 'openEuler %{version}-%{gcc_release}' > gcc/DEV-PHASE
+echo 'openEuler %{version}-%{release}' > gcc/DEV-PHASE
 
 cp -a libstdc++-v3/config/cpu/i{4,3}86/atomicity.h
 
@@ -638,19 +633,6 @@ rm -rf obj-%{gcc_target_platform}
 mkdir obj-%{gcc_target_platform}
 cd obj-%{gcc_target_platform}
 
-%if %{build_isl}
-mkdir isl-build isl-install
-cd isl-build
-../../isl-%{isl_version}/configure \
-  CC=/usr/bin/gcc CXX=/usr/bin/g++ \
-  CFLAGS="$OPT_FLAGS -O2 -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector-strong -fpic" \
-  CXXFLAGS="$OPT_FLAGS -O2 -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector-strong -fpic" \
-  --prefix=`cd ..; pwd`/isl-install --disable-shared
-make %{?_smp_mflags}
-make install
-cd ../
-%endif
-
 enablelgo=
 enablelada=
 enablelobjc=
@@ -671,7 +653,7 @@ enableld=,d
 CONFIGURE_OPTS="\
 	--prefix=%{_prefix} --mandir=%{_mandir} --infodir=%{_infodir} \
 	--with-bugurl=https://gitee.com/src-openeuler/gcc/issues \
-	--enable-shared --enable-threads=posix --enable-checking=release \
+	--enable-shared --enable-threads=posix --enable-checking=release --with-isl \
 %ifarch aarch64 riscv64
 	--enable-multilib \
 %else
@@ -684,11 +666,6 @@ CONFIGURE_OPTS="\
 	--with-linker-hash-style=gnu \
 %endif
 	--enable-plugin --enable-initfini-array \
-%if %{build_isl}
-	--with-isl=`pwd`/isl-install \
-%else
-	--without-isl \
-%endif
 %if %{attr_ifunc}
 	--enable-gnu-indirect-function \
 %endif
@@ -2670,6 +2647,9 @@ end
 %doc rpm.doc/changelogs/libcc1/ChangeLog*
 
 %changelog
+* Wed Nov 02 2022 liyancheng <412998149@qq.com> 12.2.1-5
+- Change isl dependency from Source to BuildRequire
+
 * Wed Nov 02 2022 liyancheng <412998149@qq.com> 12.2.1-4
 - Upgrade GCC to 12.2.1
 
diff --git a/isl-0.18.tar.bz2 b/isl-0.18.tar.bz2
deleted file mode 100644
index 4c8296c..0000000
Binary files a/isl-0.18.tar.bz2 and /dev/null differ