[build] add --enable-dev-tools configure flag

This builds tools that I want to keep in the same code base, but not
intended for general release.

Makefile.in

@@ -95,7 +95,14 @@ SOURCE=\
 	thin-provisioning/thin_restore.cc \
 	thin-provisioning/thin_rmap.cc \
 	thin-provisioning/thin_trim.cc \
-	thin-provisioning/xml_format.cc
+	thin-provisioning/xml_format.cc \
+
+DEVTOOLS_SOURCE=\
+	thin-provisioning/thin_generate_metadata.cc
+
+ifeq ("@DEVTOOLS@", "yes")
+SOURCE+=$(DEVTOOLS_SOURCE)
+endif
 
 CC:=@CC@
 CXX:=@CXX@
@@ -106,6 +113,11 @@ TOP_BUILDDIR:=@top_builddir@
 CFLAGS+=-g -Wall -O3
 CFLAGS+=@LFS_FLAGS@
 CXXFLAGS+=-g -Wall -fno-strict-aliasing -std=c++11
+
+ifeq ("@DEVTOOLS@", "yes")
+CXXFLAGS+=-DDEV_TOOLS
+endif
+
 CXXFLAGS+=@CXXOPTIMISE_FLAG@
 CXXFLAGS+=@CXXDEBUG_FLAG@
 CXXFLAGS+=@CXX_STRERROR_FLAG@

configure.ac

@@ -137,6 +137,14 @@ AC_ARG_ENABLE(testing,
               TESTING=$enableval, TESTING=no)
 AC_MSG_RESULT($TESTING)
 
+################################################################################
+dnl -- Enable development tools
+AC_MSG_CHECKING(whenter to enable development tools)
+AC_ARG_ENABLE(dev-tools,
+	      AC_HELP_STRING(--enable-dev-tools, [enable development tools in the makefile]),
+	      DEVTOOLS=$enableval, DEVTOOLS=no)
+AC_MSG_RESULT($DEVTOOLS)
+
 ################################################################################
 dnl -- Enable static libstdc++
 AC_MSG_CHECKING(whether to statically link libstdc++)
@@ -173,6 +181,7 @@ AC_SUBST(RELEASE_DATE)
 AC_SUBST(TESTING)
 AC_SUBST(THIN_PROVISIONING_TOOLS_VERSION)
 AC_SUBST(STATIC_CXX)
+AC_SUBST(DEVTOOLS)
 
 ################################################################################
 dnl -- First and last lines should not contain files to generate in order to

thin-provisioning/commands.cc

@@ -17,6 +17,10 @@ thin_provisioning::register_thin_commands(base::application &app)
 	app.add_cmd(command::ptr(new thin_repair_cmd()));
 	app.add_cmd(command::ptr(new thin_rmap_cmd()));
 	app.add_cmd(command::ptr(new thin_trim_cmd()));
+
+#if DEV_COMMANDS
+	app.add_cmd(command::ptr(new thin_generate_metadata_cmd()));
+#endif
 }
 
 //----------------------------------------------------------------

thin-provisioning/commands.h

@@ -70,6 +70,13 @@ namespace thin_provisioning {
 		virtual int run(int argc, char **argv);
 	};
 
+	class thin_generate_metadata_cmd : public base::command {
+	public:
+		thin_generate_metadata_cmd();
+		virtual void usage(std::ostream &out) const;
+		virtual int run(int argc, char **argv);
+	};
+
 	void register_thin_commands(base::application &app);
 }
 

thin-provisioning/thin_generate_metadata.cc

@@ -0,0 +1,25 @@
+#include "thin-provisioning/commands.h"
+
+using namespace thin_provisioning;
+
+//----------------------------------------------------------------
+
+thin_generate_metadata_cmd::thin_generate_metadata_cmd()
+	: command("thin_generate_metadata")
+{
+}
+
+void
+thin_generate_metadata_cmd::usage(std::ostream &out) const
+{
+
+}
+
+int
+thin_generate_metadata_cmd::run(int argc, char **argv)
+{
+
+	return 1;
+}
+
+//----------------------------------------------------------------