From 885f2dcfd50ab5262a18908f85ab7c0afcf65783 Mon Sep 17 00:00:00 2001
From: Georg Hopp <georg@steffers.org>
Date: Wed, 2 Oct 2013 20:33:16 +0100
Subject: [PATCH] add m4 macros to build with dragonegg and make the memopt m4
 show a message if it is active

---
 m4/dragonegg.m4 | 17 +++++++++++++++++
 m4/memopt.m4    |  5 +++--
 2 files changed, 20 insertions(+), 2 deletions(-)
 create mode 100644 m4/dragonegg.m4

diff --git a/m4/dragonegg.m4 b/m4/dragonegg.m4
new file mode 100644
index 0000000..4887587
--- /dev/null
+++ b/m4/dragonegg.m4
@@ -0,0 +1,17 @@
+AC_DEFUN([AC_DRAGONEGG],
+[
+	AC_ARG_ENABLE(dragonegg,
+		AC_HELP_STRING([--enable-dragonegg],
+		               [use dragonegg llvm plugin]),
+		[use_dragonegg=$enableval],
+		[use_dragonegg=no])
+
+	if test "x$use_dragonegg" = "xyes"; then
+	  # this could be more elaborated in finding drageonegg, etc.
+		AC_MSG_NOTICE("using dragonegg gcc plugin")
+		DRAGONEGG_FLAGS="-fplugin=/usr/lib64/llvm/dragonegg.so"
+		AC_SUBST(DRAGONEGG_FLAGS)
+	fi
+])
+
+# vim: set ft=m4 ts=2 sw=2:
diff --git a/m4/memopt.m4 b/m4/memopt.m4
index 4389752..9668c5c 100644
--- a/m4/memopt.m4
+++ b/m4/memopt.m4
@@ -7,8 +7,9 @@ AC_DEFUN([AC_MEM_OPT],
 		[use_mem_opt=no])
 
 	if test "x$use_mem_opt" = "xyes"; then
-	MEM_OPT_FLAGS="-DMEM_OPT"
-	AC_SUBST(MEM_OPT_FLAGS)
+		AC_MSG_NOTICE("Using best fit tree based memory optimizations")
+		MEM_OPT_FLAGS="-DMEM_OPT"
+		AC_SUBST(MEM_OPT_FLAGS)
 	fi
 ])