dev-libs/libxml2: патч и персборка

https://bugs.gentoo.org/745162

https://745162.bugs.gentoo.org/attachment.cgi?id=662872

profiles/templates/3.6/6_ac_install_patch/dev-libs/libxml2/.calculate_directory

@@ -0,0 +1 @@
+# Calculate append=skip merge()!=

profiles/templates/3.6/6_ac_install_patch/dev-libs/libxml2/libxml2-python3-unicode-errors.patch

@@ -0,0 +1,40 @@
+# Calculate format=diff
+Origin: https://src.fedoraproject.org/rpms/libxml2/blob/master/f/libxml2-2.9.8-python3-unicode-errors.patch
+Bug-Upstream: https://bugzilla.gnome.org/show_bug.cgi?id=789714,
+              https://gitlab.gnome.org/GNOME/libxml2/issues/64
+Bug-Ubuntu: https://launchpad.net/bugs/1869814
+
+Index: libxml2-2.9.5/python/libxml.c
+===================================================================
+--- libxml2-2.9.5.orig/python/libxml.c
++++ libxml2-2.9.5/python/libxml.c
+@@ -1620,6 +1620,7 @@ libxml_xmlErrorFuncHandler(ATTRIBUTE_UNU
+     PyObject *message;
+     PyObject *result;
+     char str[1000];
++    unsigned char *ptr = (unsigned char *)str;
+ 
+ #ifdef DEBUG_ERROR
+     printf("libxml_xmlErrorFuncHandler(%p, %s, ...) called\n", ctx, msg);
+@@ -1636,12 +1637,20 @@ libxml_xmlErrorFuncHandler(ATTRIBUTE_UNU
+ 	    str[999] = 0;
+         va_end(ap);
+ 
++#if PY_MAJOR_VERSION >= 3
++        /* Ensure the error string doesn't start at UTF8 continuation. */
++        while (*ptr && (*ptr & 0xc0) == 0x80)
++            ptr++;
++#endif
++
+         list = PyTuple_New(2);
+         PyTuple_SetItem(list, 0, libxml_xmlPythonErrorFuncCtxt);
+         Py_XINCREF(libxml_xmlPythonErrorFuncCtxt);
+-        message = libxml_charPtrConstWrap(str);
++        message = libxml_charPtrConstWrap(ptr);
+         PyTuple_SetItem(list, 1, message);
+         result = PyEval_CallObject(libxml_xmlPythonErrorFuncHandler, list);
++        /* Forget any errors caused in the error handler. */
++        PyErr_Clear();
+         Py_XDECREF(list);
+         Py_XDECREF(result);
+     }

profiles/templates/3.6/6_ac_update_sync/revision/2020/20201110-rebuild_libxml2

@@ -0,0 +1,4 @@
+# Calculate name=ini.env format=samba ini(overlay-calculate.revision)=>20191116.3,#-cut(0,-,#-cl_pass_file-#)-# rebuild=dev-libs/libxml2
+
+[overlay-calculate]
+revision = #-cut(0,-,#-cl_pass_file-#)-#