[#137,!42] Kea version moved to separate header.

Makefile.am

@@ -150,4 +150,4 @@ CLEANFILES = $(abs_top_builddir)/logger_lockfile
 
 # config.h may be included by headers supplied for building user-written
 # hooks libraries, so we need to include it in the distribution.
-pkginclude_HEADERS = config.h
+pkginclude_HEADERS = config.h kea_version.h

configure.ac

@@ -43,7 +43,11 @@ else
 fi
 # Export EXTENDED_VERSION to config.h
 # This will be either "tarball" or "git abcd".
-AC_DEFINE_UNQUOTED([EXTENDED_VERSION], ["${KEA_SRCID}"], [Extended Kea version])
+# We do not want to put this in a config.h, because it messes up ccache
+# horribly. When building different branches, the commit-id is different
+# and since the config.h is included in most files *and* has a different
+# content, ccache can't use cached content and thus has to do full compilation.
+echo "#define EXTENDED_VERSION \"${KEA_SRCID}\"" > kea_version.h
 
 # Find a separator for path_replacer
 for sep in "+" "," ";" "&" "__NONE__"; do

src/bin/dhcp4/dhcp4_srv.cc

@@ -5,6 +5,8 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <config.h>
+#include <kea_version.h>
+
 #include <dhcp/dhcp4.h>
 #include <dhcp/duid.h>
 #include <dhcp/hwaddr.h>

src/bin/dhcp4/main.cc

@@ -5,6 +5,7 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <config.h>
+#include <kea_version.h>
 
 #include <dhcp4/ctrl_dhcp4_srv.h>
 #include <dhcp4/dhcp4_log.h>

src/bin/dhcp6/dhcp6_srv.cc

@@ -5,6 +5,7 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <config.h>
+#include <kea_version.h>
 
 #include <asiolink/io_address.h>
 #include <dhcp_ddns/ncr_msg.h>

src/bin/dhcp6/main.cc

@@ -5,6 +5,7 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <config.h>
+#include <kea_version.h>
 
 #include <dhcp6/ctrl_dhcp6_srv.h>
 #include <dhcp6/dhcp6_log.h>

src/bin/lfc/lfc_controller.cc

@@ -5,6 +5,7 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <config.h>
+#include <kea_version.h>
 
 #include <lfc/lfc_controller.h>
 #include <lfc/lfc_log.h>

src/bin/netconf/main.cc

@@ -5,6 +5,7 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <config.h>
+#include <kea_version.h>
 
 #include <netconf/netconf_log.h>
 #include <exceptions/exceptions.h>

src/lib/cfgrpt/tests/config_report_unittests.cc

@@ -5,6 +5,7 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <config.h>
+#include <kea_version.h>
 #include <cfgrpt/config_report.h>
 
 #include <gtest/gtest.h>

src/lib/process/d_controller.cc

@@ -14,6 +14,7 @@
 #include <process/d_log.h>
 #include <process/d_controller.h>
 #include <process/config_base.h>
+#include <kea_version.h>
 
 #ifdef HAVE_MYSQL
 #include <dhcpsrv/mysql_lease_mgr.h>

src/lib/process/tests/d_controller_unittests.cc

@@ -5,6 +5,7 @@
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
 #include <config.h>
+#include <kea_version.h>
 
 #include <cc/command_interpreter.h>
 #include <process/testutils/d_test_stubs.h>