Add support for compiling on aarch64 (64-bit ARM).

Closes #140.

prism/Makefile

@@ -86,6 +86,9 @@ ifeq ($(OSTYPE),linux)
 	ifneq (,$(findstring ia64, $(shell uname -m)))
 		ARCH = ia64
 	endif
+	ifneq (,$(findstring aarch64, $(shell uname -m)))
+		ARCH = aarch64
+	endif
 endif
 # For Mac/Windows, we decide whether to build in 64-bit mode based on
 # whether java is 32/64-bit (since these need to match)
@@ -217,6 +220,13 @@ ifeq ($(OSTYPE),linux)
 		CXXFLAGS = --std=c++11 $(CFLAGS)
 		LDFLAGS = $(CFLAGS)
 		BINDISTSUFFIX = linux64
+	else
+	ifeq ($(ARCH),aarch64)
+		# Position Independent Code required on Aarch64
+		CFLAGS = -fPIC -DPIC -DHAVE_IEEE_754 -DBSD -DSIZEOF_VOID_P=8 -DSIZEOF_LONG=8 $(DEBUG) $(OPTIMISE) $(WARNINGS)
+		CXXFLAGS = --std=c++11 $(CFLAGS)
+		LDFLAGS = $(CFLAGS)
+		BINDISTSUFFIX = linux64
 	else
 		CFLAGS = -m32 -malign-double -DHAVE_IEEE_754 -DBSD $(DEBUG) $(OPTIMISE) $(WARNINGS)
 		CXXFLAGS = --std=c++11 $(CFLAGS)
@@ -224,6 +234,7 @@ ifeq ($(OSTYPE),linux)
 		BINDISTSUFFIX = linux32
 	endif
 	endif
+	endif
 	BIN_TARGETS=prism.linux xprism.linux
 	JFLAGS = -encoding UTF8
 	SHARED = -shared

prism/ext/lp_solve_5.5_java/lib/build

@@ -29,6 +29,9 @@ fi
 if [ "$ARCH" = "ia64" ]; then
 	CFLAGS="-fPIC -DPIC"
 fi
+if [ "$ARCH" = "aarch64" ]; then
+	CFLAGS="-fPIC -DPIC"
+fi
 
 #determine platform (32/64 bit)
 >/tmp/platform.c

prism/ext/lpsolve55/src/lp_solve_5.5/lpsolve55/ccc

@@ -11,6 +11,9 @@ fi
 if [ "$ARCH" = "ia64" ]; then
 	CFLAGS="-fPIC -DPIC"
 fi
+if [ "$ARCH" = "aarch64" ]; then
+	CFLAGS="-fPIC -DPIC"
+fi
 
 #determine platform (32/64 bit)
 >/tmp/platform.c