Almost have an x86_64 assembly example working.

Makefile

@@ -21,10 +21,12 @@
 #    distribution.
 
 # Compilers
+ASM=as
 CC=gcc
 CXX=g++
-JAVAC=javac
+LD=ld
 FTR=gfortran
+JAVAC=javac
 
 # Other commands
 RM=rm -rf
@@ -32,7 +34,13 @@ RM=rm -rf
 # Directories
 BINDIR=bin
 
-all: c cpp fortran java
+all: x86-64asm c cpp fortran java
+
+x86-64asm:
+	mkdir -p $(BINDIR)
+	$(ASM) -o src/main-x86_64.o src/main-x86_64.asm
+	$(LD) -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o \
+		$(BINDIR)/doublesgame-x86_64asm src/main-x86_64.o -lc
 
 c:
 	mkdir -p $(BINDIR)
@@ -52,4 +60,4 @@ java:
 
 .PHONY: clean
 clean:
-	$(RM) $(BINDIR)
+	$(RM) src/*.o