Added version.h with library versioning information

Makefile.in

@@ -196,7 +196,7 @@ HEADERS = aes.h arcfour.h arctwo.h asn1.h blowfish.h \
 	  md5.h md5-compat.h \
 	  memxor.h \
 	  nettle-meta.h nettle-types.h \
-	  pbkdf2.h \
+	  pbkdf2.h version.h \
 	  pgp.h pkcs1.h realloc.h ripemd160.h rsa.h \
 	  salsa20.h sexp.h \
 	  serpent.h sha.h sha1.h sha2.h sha3.h twofish.h \

configure.ac

@@ -16,6 +16,11 @@ LIBNETTLE_MINOR=0
 LIBHOGWEED_MAJOR=4
 LIBHOGWEED_MINOR=0
 
+MAJOR_VERSION=`echo $PACKAGE_VERSION | sed 's/\(.*\)\..*/\1/g'`
+MINOR_VERSION=`echo $PACKAGE_VERSION | sed 's/.*\.\(.*\)/\1/g'`
+AC_SUBST([MAJOR_VERSION])
+AC_SUBST([MINOR_VERSION])
+
 AC_CANONICAL_HOST
 
 # Command line options
@@ -895,7 +900,7 @@ if test x$GCC = xyes ; then
 # inttypes.h.
 fi
 
-AC_CONFIG_FILES([config.make config.m4 Makefile bignum.h])
+AC_CONFIG_FILES([config.make config.m4 Makefile bignum.h version.h])
 AC_CONFIG_FILES([tools/Makefile testsuite/Makefile examples/Makefile])
 AC_CONFIG_FILES([nettle.pc hogweed.pc libnettle.map libhogweed.map])
 

version.h.in

+/* version.h
+
+   Information about library version.
+
+   Copyright (C) 2015 Red Hat, Inc.
+
+   This file is part of GNU Nettle.
+
+   GNU Nettle is free software: you can redistribute it and/or
+   modify it under the terms of either:
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at your
+       option) any later version.
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at your
+       option) any later version.
+
+   or both in parallel, as here.
+
+   GNU Nettle is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef NETTLE_VERSION_H_INCLUDED
+#define NETTLE_VERSION_H_INCLUDED
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Individual version numbers in decimal */
+#define NETTLE_VERSION_MAJOR @MAJOR_VERSION@
+#define NETTLE_VERSION_MINOR @MINOR_VERSION@
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* NETTLE_VERSION_H_INCLUDED */