configure: let configure script generate config.h file

While we're at it, also let configure script generate the config.h
file. The generation of it is currently quite static, but that could
change in future. While at it, we also generate a GITVERSION define,
that we will use for ``--version'' output of the individual tools for
being able to provide better support since we can see what concrete
commit people are using when building from Git repo.

Signed-off-by: Daniel Borkmann <dborkman@redhat.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/configure b/configure
index 6a5a83e..7998572 100755
--- a/configure
+++ b/configure
@@ -419,6 +419,24 @@ EOF
 	fi
 }
 
+gen_config_hdr()
+{
+	local _version="`git describe --always`"
+	echo "[*] Generating config.h ... "
+
+	cat > config.h << EOF
+#ifndef CONFIG_H
+#define CONFIG_H
+#define FILE_CLIENTS ".curvetun/clients"
+#define FILE_SERVERS ".curvetun/servers"
+#define FILE_PRIVKEY ".curvetun/priv.key"
+#define FILE_PUBKEY ".curvetun/pub.key"
+#define FILE_USERNAM ".curvetun/username"
+#define GITVERSION "$_version"
+#endif /* CONFIG_H */
+EOF
+}
+
 echo "# This file is autogenerated by the configure script" > Config
 check_pkg_config
 
@@ -442,6 +460,8 @@ check_libpcap
 check_libcli
 check_libnet
 
+gen_config_hdr
+
 if [ "$MISSING_DEFS" == "1" ] ; then
 	echo "[!] Some libraries or header definitions are missing or too old."
 	echo "    Thus certain tools will not be built (see below). Please"