diff --git a/csexp-1.5.1.tbz b/csexp-1.5.1.tbz
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diff --git a/ocaml-csexp.spec b/ocaml-csexp.spec
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+%ifnarch %{ocaml_native_compiler}
+%global debug_package %{nil}
+%endif
+
+%bcond_with dune
+
+Name:           ocaml-csexp
+Version:        1.5.1
+Release:        1
+Summary:        Parsing and printing of S-expressions in canonical form
+
+License:        MIT
+URL:            https://github.com/ocaml-dune/csexp
+Source0:        https://github.com/ocaml-dune/csexp/releases/download/%{version}/csexp-%{version}.tbz
+
+BuildRequires:  ocaml >= 4.03.0
+%if %{with dune}
+BuildRequires:  ocaml-dune >= 1.11
+BuildRequires:  ocaml-odoc
+%endif
+
+%description
+This project provides minimal support for parsing and printing
+S-expressions in canonical form, which is a very simple and canonical
+binary encoding of S-expressions.
+
+%package        devel
+Summary:        Development files for %{name}
+Requires:       %{name}%{?_isa} = %{version}-%{release}
+
+%description    devel
+The %{name}-devel package contains libraries and signature files for
+developing applications that use %{name}.
+
+%prep
+%autosetup -N -n csexp-%{version}
+
+%build
+%if %{with dune}
+dune build %{?_smp_mflags} --display=verbose @install
+dune build %{?_smp_mflags} @doc
+%else
+OFLAGS="-strict-sequence -strict-formats -short-paths -keep-locs -g"
+OCFLAGS="$OFLAGS -bin-annot"
+cd src
+ocamlc $OCFLAGS -output-obj csexp.mli
+ocamlc $OCFLAGS -a -o csexp.cma csexp.ml
+%ifarch %{ocaml_native_compiler}
+ocamlopt $OFLAGS -ccopt "%{build_cflags}" -cclib "%{build_ldflags}" -a \
+  -o csexp.cmxa csexp.ml
+ocamlopt $OFLAGS -ccopt "%{build_cflags}" -cclib "%{build_ldflags}" -shared \
+  -o csexp.cmxs csexp.ml
+%endif
+cd -
+%endif
+
+%install
+%if %{with dune}
+dune install --destdir=%{buildroot}
+
+find _build/default/_doc/_html -name .dune-keep -delete
+
+find %{buildroot}%{_libdir}/ocaml -name \*.ml -delete
+
+rm -fr %{buildroot}%{_prefix}/doc
+%else
+mkdir -p %{buildroot}%{_libdir}/ocaml/csexp
+cp -p src/csexp.{cma,cmi,cmt,cmti,mli} %{buildroot}%{_libdir}/ocaml/csexp
+%ifarch %{ocaml_native_compiler}
+cp -p src/csexp.{a,cmx,cmxa,cmxs} %{buildroot}%{_libdir}/ocaml/csexp
+%endif
+cp -p csexp.opam %{buildroot}%{_libdir}/ocaml/csexp/opam
+
+cat >> %{buildroot}%{_libdir}/ocaml/csexp/META << EOF
+version = "%{version}"
+description = "Parsing and printing of S-expressions in canonical form"
+archive(byte) = "csexp.cma"
+%ifarch %{ocaml_native_compiler}
+archive(native) = "csexp.cmxa"
+%endif
+plugin(byte) = "csexp.cma"
+%ifarch %{ocaml_native_compiler}
+plugin(native) = "csexp.cmxs"
+%endif
+EOF
+
+cat >> %{buildroot}%{_libdir}/ocaml/csexp/dune-package << EOF
+(lang dune 2.8)
+(name csexp)
+(version %{version})
+(library
+ (name csexp)
+ (kind normal)
+%ifarch %{ocaml_native_compiler}
+ (archives (byte csexp.cma) (native csexp.cmxa))
+ (plugins (byte csexp.cma) (native csexp.cmxs))
+ (native_archives csexp.a)
+%else
+ (archives (byte csexp.cma))
+ (plugins (byte csexp.cma))
+%endif
+ (main_module_name Csexp)
+%ifarch %{ocaml_native_compiler}
+ (modes byte native)
+%else
+ (modes byte)
+%endif
+ (modules
+  (singleton (name Csexp) (obj_name csexp) (visibility public) (impl) (intf))))
+EOF
+%endif
+
+
+%files
+%doc README.md
+%license LICENSE.md
+%dir %{_libdir}/ocaml/csexp/
+%{_libdir}/ocaml/csexp/META
+%{_libdir}/ocaml/csexp/*.cma
+%{_libdir}/ocaml/csexp/*.cmi
+%ifarch %{ocaml_native_compiler}
+%{_libdir}/ocaml/csexp/*.cmxs
+%endif
+
+%files devel
+%{_libdir}/ocaml/csexp/dune-package
+%{_libdir}/ocaml/csexp/opam
+%ifarch %{ocaml_native_compiler}
+%{_libdir}/ocaml/csexp/*.a
+%{_libdir}/ocaml/csexp/*.cmx
+%{_libdir}/ocaml/csexp/*.cmxa
+%endif
+%{_libdir}/ocaml/csexp/*.cmt
+%{_libdir}/ocaml/csexp/*.cmti
+%{_libdir}/ocaml/csexp/*.mli
+
+%changelog
+* Thu Jan 20 2022 xu_ping <xuping33@huawei.com> - 1.5.1-1
+- Package init
diff --git a/ocaml-csexp.yaml b/ocaml-csexp.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..c8295107c8be38951e586a4f848d1b6fd2287caf
--- /dev/null
+++ b/ocaml-csexp.yaml
@@ -0,0 +1,4 @@
+version_control: github
+src_repo: ocaml-dune/csexp
+tag_prefix: "^"
+seperator: "."