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diff -up Python-2.7.13/configure.build Python-2.7.13/configure
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--- Python-2.7.13/configure.build	2019-06-04 13:32:12.772134075 +0200
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+++ Python-2.7.13/configure	2019-06-04 13:32:26.140144601 +0200
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@@ -6018,11 +6018,11 @@ then
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 		# debug builds.
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 		OPT="-g -O0 -Wall $STRICT_PROTO"
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 	    else
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-		OPT="-g $WRAP -O3 -Wall $STRICT_PROTO"
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+		OPT="-g $WRAP -O2 -Wall $STRICT_PROTO"
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 	    fi
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 	    ;;
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 	*)
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-	    OPT="-O3 -Wall $STRICT_PROTO"
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+	    OPT="-O2 -Wall $STRICT_PROTO"
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 	    ;;
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 	esac
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 	case $ac_sys_system in