Add support for M1 Mac

* wref to issue #13
* We do this with the help of inbuilt arch command "Rosetta 2", For now Rosetta is here to stay
* and we can make use of it's capabilities to compile x86 instructions on arm machine

Makefile

@@ -2,6 +2,15 @@ CC     = gcc
 RACKET = racket
 RM     = rm
 
+UNAME_S := $(shell uname -s)
+UNAME_P := $(shell uname -p)
+ifeq ($(UNAME_S),Darwin)
+    ifeq ($(UNAME_P),arm)
+        $(info M1 MacOSX detected)
+        CC := arch -x86_64 $(CC)
+    endif
+endif
+
 runtime.o: runtime.c runtime.h
 	$(CC) -c -g -std=c99 runtime.c
 

utilities.rkt

@@ -2244,6 +2244,13 @@ Changelog:
        (close-output-port out)
        result)]))
 
+(define (get-arch)
+     (match (system-type 'arch)
+      [ 'aarch64 
+        (match (system-type 'os)
+        [ 'macosx "arch -x86_64 "])]
+      [ else "" ]))
+
 (define (compiler-tests-suite name typechecker passes test-family test-nums)
   (let ([compiler (compile-file typechecker passes)])
     (make-test-suite
@@ -2258,7 +2265,7 @@ Changelog:
               (test-case "typecheck" (check-false typechecks "Expected expression to fail typechecking"))
 	      (if (not typechecks) (fail "Expected expression to typecheck")
 		  (test-case "code generation"
-			     (let ([gcc-output (system (format "gcc -g -march=x86-64 -std=c99 runtime.o ./tests/~a.s -o ./tests/~a.out" test-name test-name))])
+			     (let ([gcc-output (system (format (string-append (get-arch) "gcc -g -std=c99 runtime.o ./tests/~a.s -o ./tests/~a.out") test-name test-name))])
 			       (if (not gcc-output) (fail "Failed during assembly")
 				   (let ([input (if (file-exists? (format "./tests/~a.in" test-name))
 						    (format " < ./tests/~a.in" test-name)