Add src/vlib/config.h.in template

Change-Id: I9b81dcb9250cab09b88f161366da9475a7ee5dd6
Signed-off-by: Damjan Marion <damarion@cisco.com>

.gitignore

@@ -36,7 +36,6 @@ aclocal.m4
 app.info
 compile
 config.h
-config.h.in
 config.log
 config.guess
 config.sub

src/configure.ac

@@ -3,7 +3,14 @@ LT_INIT
 AC_CONFIG_AUX_DIR([.])
 AM_INIT_AUTOMAKE([subdir-objects])
 AM_SILENT_RULES([yes])
-AC_CONFIG_FILES([Makefile plugins/Makefile vpp-api/python/Makefile vpp-api/java/Makefile vpp-api/vapi/Makefile])
+AC_CONFIG_FILES([ \
+  Makefile \
+  plugins/Makefile \
+  vpp-api/python/Makefile \
+  vpp-api/java/Makefile \
+  vpp-api/vapi/Makefile \
+  vlib/config.h \
+])
 AC_CONFIG_MACRO_DIR([m4])
 
 AC_PROG_CC

src/vlib.am

@@ -16,11 +16,6 @@ lib_LTLIBRARIES += libvlib.la
 libvlib_la_LIBADD = libvppinfra.la -ldl -lpthread
 libvlib_la_DEPENDENCIES = libvppinfra.la
 
-BUILT_SOURCES += vlib/config.h
-
-vlib/config.h:
-	@echo "#define __PRE_DATA_SIZE" @PRE_DATA_SIZE@ > $@
-
 libvlib_la_SOURCES =				\
   vlib/buffer.c					\
   vlib/buffer_serialize.c			\

src/vlib/config.h.in

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef included_vlib_config_h
+#define included_vlib_config_h
+
+#define __PRE_DATA_SIZE @PRE_DATA_SIZE@
+
+#endif