Compile an integer to an exectuable that exits with the given number

.gitignore

@@ -0,0 +1,5 @@
+*~
+*.o
+tmp*
+a.out
+chibicc

Makefile

@@ -0,0 +1,12 @@
+CFLAGS=-std=c11 -g -static -fno-common
+
+chibicc: main.o
+	$(CC) -o $@ $? $(LDFLAGS)
+
+test: chibicc
+	./test.sh
+
+clean:
+	rm -f chibicc *.o *~ tmp*
+
+.PHONY: test clean

main.c

@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv) {
+  if (argc != 2) {
+    fprintf(stderr, "%s: invalid number of arguments\n", argv[0]);
+    return 1;
+  }
+
+  printf(".intel_syntax noprefix\n");
+  printf(".global main\n");
+  printf("main:\n");
+  printf("  mov rax, %d\n", atoi(argv[1]));
+  printf("  ret\n");
+  return 0;
+}

test.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+assert() {
+  expected="$1"
+  input="$2"
+
+  ./chibicc "$input" > tmp.s
+  gcc -static -o tmp tmp.s
+  ./tmp
+  actual="$?"
+
+  if [ "$actual" = "$expected" ]; then
+    echo "$input => $actual"
+  else
+    echo "$input => $expected expected, but got $actual"
+    exit 1
+  fi
+}
+
+assert 0 0
+assert 42 42
+
+echo OK