(partial, not finished: rpmdbIndex* and headerImport APIs are used)
--- libsolv-0.6.34/ext/repo_rpmdb_librpm.h.orig	2018-03-23 12:04:14.000000000 +0100
+++ libsolv-0.6.34/ext/repo_rpmdb_librpm.h	2018-05-10 20:28:01.213443653 +0200
@@ -15,6 +15,12 @@
 #include <rpm/rpmts.h>
 #include <rpm/rpmmacro.h>
 
+#ifdef RPM5
+#define _RPMVSF_NOSIGNATURES (RPMVSF_NODSAHEADER | RPMVSF_NORSAHEADER | RPMVSF_NODSA | RPMVSF_NORSA)
+#define _RPMVSF_NODIGESTS (RPMVSF_NOSHA1HEADER | RPMVSF_NOMD5HEADER | RPMVSF_NOSHA1 | RPMVSF_NOMD5)
+#define _RPMVSF_NOHEADER (RPMVSF_NOSHA1HEADER | RPMVSF_NOMD5HEADER | RPMVSF_NODSAHEADER | RPMVSF_NORSAHEADER)
+#endif
+
 struct rpmdbstate {
   Pool *pool;
   char *rootdir;
--- libsolv-0.6.35/ext/repo_rpmdb.c.orig	2019-06-04 17:32:58.000000000 +0200
+++ libsolv-0.6.35/ext/repo_rpmdb.c	2019-06-04 17:33:15.457951815 +0200
@@ -30,6 +30,8 @@
 #include <rpm/rpmpgp.h>
 #ifndef RPM5
 #include <rpm/header.h>
+#else
+#include <rpm/rpm46compat.h>
 #endif
 #include <rpm/rpmdb.h>