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digistump-sam/system/libsam/build_gcc/debug.mk

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+#
+#  Copyright (c) 2011 Arduino.  All right reserved.
+#
+#  This library is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU Lesser General Public
+#  License as published by the Free Software Foundation; either
+#  version 2.1 of the License, or (at your option) any later version.
+#
+#  This library is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
+#  See the GNU Lesser General Public License for more details.
+#
+#  You should have received a copy of the GNU Lesser General Public
+#  License along with this library; if not, write to the Free Software
+#  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#
+
+# Optimization level
+# -O1 Optimize
+# -O2 Optimize even more
+# -O3 Optimize yet more
+# -O0 Reduce compilation time and make debugging produce the expected results
+# -Os Optimize for size
+OPTIMIZATION = -g -O0 -DDEBUG