diff --git a/tre-CVE-2016-8859.patch b/tre-CVE-2016-8859.patch
new file mode 100644
index 0000000..3166c1d
--- /dev/null
+++ b/tre-CVE-2016-8859.patch
@@ -0,0 +1,36 @@
+diff -up tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-match-parallel.c.CVE-2016-8859 tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-match-parallel.c
+--- tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-match-parallel.c.CVE-2016-8859	2014-02-28 19:55:36.000000000 +0100
++++ tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-match-parallel.c	2016-11-02 22:07:41.984468354 +0100
+@@ -59,6 +59,9 @@ char *alloca ();
+ #ifdef HAVE_MALLOC_H
+ #include <malloc.h>
+ #endif /* HAVE_MALLOC_H */
++#ifdef HAVE_STDINT_H
++#include <stdint.h>
++#endif /* HAVE_STDINT_H */
+ 
+ #include "tre-internal.h"
+ #include "tre-match-utils.h"
+@@ -153,7 +156,7 @@ tre_tnfa_run_parallel(const tre_tnfa_t *
+      everything in a single large block from the stack frame using alloca()
+      or with malloc() if alloca is unavailable. */
+   {
+-    int tbytes, rbytes, pbytes, xbytes, total_bytes;
++    size_t tbytes, rbytes, pbytes, xbytes, total_bytes;
+     char *tmp_buf;
+     /* Compute the length of the block we need. */
+     tbytes = sizeof(*tmp_tags) * num_tags;
+@@ -168,11 +171,11 @@ tre_tnfa_run_parallel(const tre_tnfa_t *
+ #ifdef TRE_USE_ALLOCA
+     buf = alloca(total_bytes);
+ #else /* !TRE_USE_ALLOCA */
+-    buf = xmalloc((unsigned)total_bytes);
++    buf = xmalloc(total_bytes);
+ #endif /* !TRE_USE_ALLOCA */
+     if (buf == NULL)
+       return REG_ESPACE;
+-    memset(buf, 0, (size_t)total_bytes);
++    memset(buf, 0, total_bytes);
+ 
+     /* Get the various pointers within tmp_buf (properly aligned). */
+     tmp_tags = (void *)buf;
diff --git a/tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca.tar.gz b/tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca.tar.gz
new file mode 100644
index 0000000..79ae8b2
Binary files /dev/null and b/tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca.tar.gz differ
diff --git a/tre-chicken.patch b/tre-chicken.patch
new file mode 100644
index 0000000..d81f5e4
--- /dev/null
+++ b/tre-chicken.patch
@@ -0,0 +1,21 @@
+diff -up tre-0.8.0/python/setup.py.chicken tre-0.8.0/python/setup.py
+--- tre-0.8.0/python/setup.py.chicken	2009-09-20 09:51:01.000000000 +0200
++++ tre-0.8.0/python/setup.py	2009-09-20 15:43:45.000000000 +0200
+@@ -10,7 +10,8 @@ import shutil
+ 
+ version = "0.8.0"
+ data_files = []
+-include_dirs = ["../lib"]
++include_dirs = ["../include"]
++library_dirs = ["../lib/.libs"]
+ libraries = ["tre"]
+ 
+ if sys.platform == "win32":
+@@ -31,6 +32,7 @@ setup(name = "tre",
+                                sources = ["tre-python.c"],
+                                define_macros = [("HAVE_CONFIG_H", None)],
+                                include_dirs = include_dirs,
++                               library_dirs = library_dirs,
+                                libraries = libraries
+                                ),
+                      ],
diff --git a/tre-issue37.patch b/tre-issue37.patch
new file mode 100644
index 0000000..2e1c5ef
--- /dev/null
+++ b/tre-issue37.patch
@@ -0,0 +1,12 @@
+diff -up tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-parse.c.issue37 tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-parse.c
+--- tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-parse.c.issue37	2014-02-28 19:55:36.000000000 +0100
++++ tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-parse.c	2016-11-02 21:01:51.705351218 +0100
+@@ -1480,6 +1480,8 @@ tre_parse(tre_parse_ctx_t *ctx)
+ 		      ctx->re++;
+ 		      while (ctx->re_end - ctx->re >= 0)
+ 			{
++			  if (i == sizeof(tmp))
++			    return REG_EBRACE;
+ 			  if (ctx->re[0] == CHAR_RBRACE)
+ 			    break;
+ 			  if (tre_isxdigit(ctx->re[0]))
diff --git a/tre-issue50.patch b/tre-issue50.patch
new file mode 100644
index 0000000..39f2e00
--- /dev/null
+++ b/tre-issue50.patch
@@ -0,0 +1,12 @@
+diff -up tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-parse.c.issue50 tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-parse.c
+--- tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-parse.c.issue50	2019-02-23 17:36:40.940463693 +0100
++++ tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/lib/tre-parse.c	2019-02-23 18:40:41.111544430 +0100
+@@ -1341,7 +1341,7 @@ tre_parse(tre_parse_ctx_t *ctx)
+ 
+ 	    case CHAR_RPAREN:  /* end of current subexpression */
+ 	      if ((ctx->cflags & REG_EXTENDED && depth > 0)
+-		  || (ctx->re > ctx->re_start
++		  || (!(ctx->cflags & REG_EXTENDED) && ctx->re > ctx->re_start
+ 		      && *(ctx->re - 1) == CHAR_BACKSLASH))
+ 		{
+ 		  DPRINT(("tre_parse:	    empty: '%.*" STRF "'\n",
diff --git a/tre-ldflags.patch b/tre-ldflags.patch
new file mode 100644
index 0000000..827f6fa
--- /dev/null
+++ b/tre-ldflags.patch
@@ -0,0 +1,10 @@
+diff -up tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/tre.pc.in.ldflags tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/tre.pc.in
+--- tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/tre.pc.in.ldflags	2014-02-28 19:55:36.000000000 +0100
++++ tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/tre.pc.in	2015-06-08 22:55:39.316078801 +0200
+@@ -6,5 +6,5 @@ includedir=@includedir@
+ Name: TRE
+ Description: TRE regexp matching library
+ Version: @PACKAGE_VERSION@
+-Libs: -L${libdir} -ltre @LDFLAGS@ @LIBINTL@ @LIBS@
++Libs: -L${libdir} -ltre @LIBINTL@ @LIBS@
+ Cflags: -I${includedir} @CPPFLAGS@
diff --git a/tre-python3.patch b/tre-python3.patch
new file mode 100644
index 0000000..bd6798d
--- /dev/null
+++ b/tre-python3.patch
@@ -0,0 +1,193 @@
+diff -up tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/python/example.py.py3 tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/python/example.py
+--- tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/python/example.py.py3	2014-02-28 19:55:36.000000000 +0100
++++ tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/python/example.py	2019-02-24 00:13:35.372854041 +0100
+@@ -1,7 +1,7 @@
+ import tre
+ 
+ fz = tre.Fuzzyness(maxerr = 3)
+-print fz
++print (fz)
+ 
+ pt = tre.compile("Don(ald( Ervin)?)? Knuth", tre.EXTENDED)
+ data = """
+@@ -16,5 +16,5 @@ typefaces.
+ m = pt.search(data, fz)
+ 
+ if m:
+-    print m.groups()
+-    print m[0]
++    print (m.groups())
++    print (m[0])
+diff -up tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/python/tre-python.c.py3 tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/python/tre-python.c
+--- tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/python/tre-python.c.py3	2014-02-28 19:55:36.000000000 +0100
++++ tre-c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca/python/tre-python.c	2019-02-24 00:13:35.373854053 +0100
+@@ -86,9 +86,9 @@ TreFuzzyness_repr(PyObject *obj)
+   TreFuzzynessObject *self = (TreFuzzynessObject*)obj;
+   PyObject *o;
+ 
+-  o = PyString_FromFormat("%s(delcost=%d,inscost=%d,maxcost=%d,subcost=%d,"
++  o = PyUnicode_FromFormat("%s(delcost=%d,inscost=%d,maxcost=%d,subcost=%d,"
+ 			  "maxdel=%d,maxerr=%d,maxins=%d,maxsub=%d)",
+-			  self->ob_type->tp_name, self->ap.cost_del,
++			  Py_TYPE(self)->tp_name, self->ap.cost_del,
+ 			  self->ap.cost_ins, self->ap.max_cost,
+ 			  self->ap.cost_subst, self->ap.max_del,
+ 			  self->ap.max_err, self->ap.max_ins,
+@@ -118,8 +118,7 @@ static PyMemberDef TreFuzzyness_members[
+ };
+ 
+ static PyTypeObject TreFuzzynessType = {
+-  PyObject_HEAD_INIT(NULL)
+-  0,			        /* ob_size */
++  PyVarObject_HEAD_INIT(NULL, 0)
+   TRE_MODULE ".Fuzzyness",	/* tp_name */
+   sizeof(TreFuzzynessObject),	/* tp_basicsize */
+   0,			        /* tp_itemsize */
+@@ -193,7 +192,7 @@ PyTreMatch_groups(TreMatchObject *self,
+ }
+ 
+ static PyObject *
+-PyTreMatch_groupi(PyObject *obj, int gn)
++PyTreMatch_groupi(PyObject *obj, Py_ssize_t gn)
+ {
+   TreMatchObject *self = (TreMatchObject*)obj;
+   PyObject *result;
+@@ -220,7 +219,7 @@ PyTreMatch_group(TreMatchObject *self, P
+   PyObject *result;
+   long gn;
+ 
+-  gn = PyInt_AsLong(grpno);
++  gn = PyLong_AsLong(grpno);
+ 
+   if (PyErr_Occurred())
+     return NULL;
+@@ -277,8 +276,7 @@ static PySequenceMethods TreMatch_as_seq
+ };
+ 
+ static PyTypeObject TreMatchType = {
+-  PyObject_HEAD_INIT(NULL)
+-  0,			        /* ob_size */
++  PyVarObject_HEAD_INIT(NULL, 0)
+   TRE_MODULE ".Match",		/* tp_name */
+   sizeof(TreMatchObject),	/* tp_basicsize */
+   0,			        /* tp_itemsize */
+@@ -380,8 +378,8 @@ PyTrePattern_search(TrePatternObject *se
+     }
+   else
+     {
+-      targ = PyString_AsString(pstring);
+-      tlen = PyString_Size(pstring);
++      targ = PyBytes_AsString(pstring);
++      tlen = PyBytes_Size(pstring);
+ 
+       rc = tre_reganexec(&self->rgx, targ, tlen, &mo->am, fz->ap, eflags);
+     }
+@@ -433,8 +431,7 @@ PyTrePattern_dealloc(TrePatternObject *s
+ }
+ 
+ static PyTypeObject TrePatternType = {
+-  PyObject_HEAD_INIT(NULL)
+-  0,			        /* ob_size */
++  PyVarObject_HEAD_INIT(NULL, 0)
+   TRE_MODULE ".Pattern",	/* tp_name */
+   sizeof(TrePatternObject),	/* tp_basicsize */
+   0,			        /* tp_itemsize */
+@@ -467,7 +464,7 @@ static PyTypeObject TrePatternType = {
+ };
+ 
+ static TrePatternObject *
+-newTrePatternObject()
++newTrePatternObject(void)
+ {
+   TrePatternObject *self;
+ 
+@@ -482,7 +479,7 @@ static PyObject *
+ PyTre_ncompile(PyObject *self, PyObject *args)
+ {
+   TrePatternObject *rv;
+-  PyUnicodeObject *upattern = NULL;
++  PyObject *upattern = NULL;
+   char *pattern = NULL;
+   int pattlen;
+   int cflags = 0;
+@@ -537,9 +534,8 @@ static PyMethodDef tre_methods[] = {
+   { NULL, NULL }
+ };
+ 
+-static char *tre_doc =
+-"Python module for TRE library\n\nModule exports "
+-"the only function: compile";
++
++#define tre_doc "Python module for TRE library\n\nModule exports the only function: compile"
+ 
+ static struct _tre_flags {
+   char *name;
+@@ -556,40 +552,57 @@ static struct _tre_flags {
+   { NULL, 0 }
+ };
+ 
++
++static struct PyModuleDef moduledef = {
++  PyModuleDef_HEAD_INIT,
++  TRE_MODULE ".Module",   /* m_name */
++  tre_doc,             /* m_doc */
++  -1,                  /* m_size */
++  tre_methods,         /* m_methods */
++  NULL,                /* m_reload */
++  NULL,                /* m_traverse */
++  NULL,                /* m_clear */
++  NULL,                /* m_free */
++};
++
++
+ PyMODINIT_FUNC
+-inittre(void)
++PyInit_tre(void)
+ {
+   PyObject *m;
+   struct _tre_flags *fp;
+ 
+   if (PyType_Ready(&TreFuzzynessType) < 0)
+-    return;
++    return NULL;
+   if (PyType_Ready(&TreMatchType) < 0)
+-    return;
++    return NULL;
+   if (PyType_Ready(&TrePatternType) < 0)
+-    return;
++    return NULL;
+ 
+   /* Create the module and add the functions */
+-  m = Py_InitModule3(TRE_MODULE, tre_methods, tre_doc);
++
++  m = PyModule_Create (&moduledef);
++
+   if (m == NULL)
+-    return;
++    return NULL;
+ 
+   Py_INCREF(&TreFuzzynessType);
+   if (PyModule_AddObject(m, "Fuzzyness", (PyObject*)&TreFuzzynessType) < 0)
+-    return;
++    return NULL;
+   Py_INCREF(&TreMatchType);
+   if (PyModule_AddObject(m, "Match", (PyObject*)&TreMatchType) < 0)
+-    return;
++    return NULL;
+   Py_INCREF(&TrePatternType);
+   if (PyModule_AddObject(m, "Pattern", (PyObject*)&TrePatternType) < 0)
+-    return;
++    return NULL;
+   ErrorObject = PyErr_NewException(TRE_MODULE ".Error", NULL, NULL);
+   Py_INCREF(ErrorObject);
+   if (PyModule_AddObject(m, "Error", ErrorObject) < 0)
+-    return;
++    return NULL;
+ 
+   /* Insert the flags */
+   for (fp = tre_flags; fp->name != NULL; fp++)
+     if (PyModule_AddIntConstant(m, fp->name, fp->val) < 0)
+-      return;
++      return NULL;
++  return m;
+ }
diff --git a/tre-tests.patch b/tre-tests.patch
new file mode 100644
index 0000000..38b27ba
--- /dev/null
+++ b/tre-tests.patch
@@ -0,0 +1,11 @@
+diff -up tre-0.7.6/tests/agrep/run-tests.sh.tests tre-0.7.6/tests/agrep/run-tests.sh
+--- tre-0.7.6/tests/agrep/run-tests.sh.tests	2009-03-11 10:44:44.000000000 +0100
++++ tre-0.7.6/tests/agrep/run-tests.sh	2009-08-22 20:20:15.885084058 +0200
+@@ -2,6 +2,7 @@
+ 
+ set -e
+ 
++export LD_LIBRARY_PATH=$top_builddir/lib/.libs
+ agrep="$top_builddir/src/agrep"
+ 
+ echo "$builddir $top_builddir $srcdir"
diff --git a/tre.spec b/tre.spec
new file mode 100644
index 0000000..e6328a2
--- /dev/null
+++ b/tre.spec
@@ -0,0 +1,110 @@
+%global commit c2f5d130c91b1696385a6ae0b5bcfd5214bcc9ca
+%global shortcommit %(c=%{commit}; echo ${c:0:7})
+Name:                tre
+Version:             0.8.0
+Release:             1
+License:             BSD
+Source0:             https://github.com/laurikari/tre/archive/%{commit}/tre-%{commit}.tar.gz
+Patch0:              %{name}-chicken.patch
+Patch1:              %{name}-tests.patch
+Patch2:              %{name}-ldflags.patch
+Patch3:              %{name}-CVE-2016-8859.patch
+Patch4:              %{name}-issue37.patch
+Patch5:              %{name}-issue50.patch
+Patch10:             %{name}-python3.patch
+Summary:             POSIX compatible regexp library with approximate matching
+URL:                 http://laurikari.net/tre/
+BuildRequires:       gettext-devel glibc-langpack-en libtool python3-devel glibc-all-langpacks
+Requires:            %{name}-common = %{version}-%{release}
+%description
+TRE is a lightweight, robust, and efficient POSIX compatible regexp
+matching library with some exciting features such as approximate
+matching.
+
+%package common
+Summary:             Cross-platform files for use with the tre package
+BuildArch:           noarch
+%description common
+This package contains platform-agnostic files used by the TRE
+library.
+
+%package devel
+Requires:            tre = %{version}-%{release}
+Summary:             Development files for use with the tre package
+%description devel
+This package contains header files and static libraries for use when
+building applications which use the TRE library.
+
+%package -n python3-%{name}
+Summary:             Python bindings for the tre library
+%{?python_provide:%python_provide python3-tre}
+%description -n python3-%{name}
+This package contains the python bindings for the TRE library.
+
+%package -n agrep
+Summary:             Approximate grep utility
+%description -n agrep
+The agrep tool is similar to the commonly used grep utility, but agrep
+can be used to search for approximate matches.
+The agrep tool searches text input for lines (or records separated by
+strings matching arbitrary regexps) that contain an approximate, or
+fuzzy, match to a specified regexp, and prints the matching lines.
+Limits can be set on how many errors of each kind are allowed, or
+only the best matching lines can be output.
+Unlike other agrep implementations, TRE agrep allows full POSIX
+regexps of any length, any number of errors, and non-uniform costs.
+
+%prep
+%setup -q -n tre-%{commit}
+%patch0 -p1 -b .chicken
+%patch1 -p1 -b .tests
+%patch2 -p1 -b .ldflags
+%patch3 -p1 -b .CVE-2016-8859
+%patch4 -p1 -b .issue37
+%patch5 -p1 -b .issue50
+%patch10 -p1
+touch ChangeLog
+autoreconf -vif
+
+%build
+%configure --disable-static --disable-rpath
+%{__make} %{?_smp_mflags}
+pushd python
+%py3_build
+popd
+
+%install
+%{__make} install DESTDIR=$RPM_BUILD_ROOT
+pushd python
+%py3_install
+popd
+rm $RPM_BUILD_ROOT%{_libdir}/*.la
+%find_lang %{name}
+
+%check
+%{__make} check
+%ldconfig_scriptlets
+
+%files
+%{_libdir}/libtre.so.*
+
+%files common -f %{name}.lang
+%doc AUTHORS ChangeLog LICENSE NEWS README THANKS TODO
+%doc doc/*.html doc/*.css
+
+%files devel
+%{_libdir}/libtre.so
+%{_libdir}/pkgconfig/*
+%{_includedir}/*
+
+%files -n python3-%{name}
+%attr(0755,root,root) %{python3_sitearch}/tre.cpython-%{python3_version_nodots}*-%{_arch}-linux%{_gnu}.so
+%{python3_sitearch}/tre-%{version}-py%{python3_version}.egg-info
+
+%files -n agrep
+%{_bindir}/agrep
+%{_mandir}/man1/agrep.1*
+
+%changelog
+* Wed May 12 2021 zhangtao <zhangtao307@huawei.com> - 0.8.0-1
+- package init