Patch for CuraEngine's Makefile that should make it compilable on a Raspberry Pi. From http://umforum.ultimaker.com/index.php?/topic/5943-recent-build-of-curaengine-wont-compile-on-raspberry-pi/?p=58539

CuraEngine.patch

--- Makefile.orig	2014-10-01 07:56:20.923057917 +0000
+++ Makefile	2014-10-01 07:58:35.839060822 +0000
@@ -12,6 +12,8 @@
 CXX ?= g++
 CFLAGS += -c -Wall -Wextra -Wold-style-cast -Woverloaded-virtual -std=c++11 -DVERSION=\"$(VERSION)\" -isystem libs
 
+FLTO = #allow for enable/disabling of link-time-optimization. Pass FLTO=-flto to enable. Default is disabled.
+
 ifeq ($(BUILD_TYPE),DEBUG)
 	CFLAGS+=-ggdb -Og -g
 endif
@@ -38,8 +40,8 @@
 ifeq ($(OS),Windows_NT)
 	#For windows make it large address aware, which allows the process to use more then 2GB of memory.
 	EXECUTABLE := $(EXECUTABLE).exe
-	CFLAGS += -march=pentium4 -flto
-	LDFLAGS += -Wl,--large-address-aware -lm -lwsock32 -flto
+	CFLAGS += -march=pentium4 $(FLTO)
+	LDFLAGS += -Wl,--large-address-aware -lm -lwsock32 $(FLTO)
 	MKDIR_PREFIX = mkdir -p
 else
 	MKDIR_PREFIX = mkdir -p
@@ -49,8 +51,8 @@
 		ifeq ($(BUILD_TYPE),DEBUG)
 			LDFLAGS += --static
 		else
-			CFLAGS += -flto
-			LDFLAGS += --static -flto
+			CFLAGS += $(FLTO)
+			LDFLAGS += --static $(FLTO)
 		endif
 	endif
 	ifeq ($(UNAME), Darwin)