Run-time version information is now available

Run-time version information is available as exported four integers:
- const int      nl_ver_num = LIBNL_VER_NUM;
- const int      nl_ver_maj = LIBNL_VER_MAJ;
- const int      nl_ver_min = LIBNL_VER_MIN;
- const int      nl_ver_mic = LIBNL_VER_MIC;

The purpose of this is to get version of compiled library as run time.
Use cases:
- To know exact version of the library in Python's ctypes module,
  Say, to find out if nl_cache_mngr_alloc() allow sk=NULL

- To make sure that the version of the loaded library corresponds to the
  version of headers (for the paranoid). Say, to check:

  if (LIBNL_VER_NUM != nl_ver_num)
      exit(1);

1 files changed, 10 insertions, 1 deletions

diff --git a/include/netlink/version.h.in b/include/netlink/version.h.in
index ac56799..35bf2aa 100644
--- a/include/netlink/version.h.in
+++ b/include/netlink/version.h.in
@@ -1,5 +1,5 @@
 /*
- * netlink/version.h	Compile Time Versioning Information
+ * netlink/version.h	Versioning Information
  *
  *	This library is free software; you can redistribute it and/or
  *	modify it under the terms of the GNU Lesser General Public
@@ -12,6 +12,8 @@
 #ifndef NETLINK_VERSION_H_
 #define NETLINK_VERSION_H_
 
+/* Compile Time Versioning Information */
+
 #define LIBNL_STRING "@PACKAGE_STRING@"
 #define LIBNL_VERSION "@PACKAGE_VERSION@"
 
@@ -25,4 +27,11 @@
 #define LIBNL_REVISION		@LT_REVISION@
 #define LIBNL_AGE		@LT_AGE@
 
+/* Run-time version information */
+
+extern const int        nl_ver_num;
+extern const int        nl_ver_maj;
+extern const int        nl_ver_min;
+extern const int        nl_ver_mic;
+
 #endif