From 82171f9ec347e3d1b4b5347b6f905f9a376a35ab Mon Sep 17 00:00:00 2001
From: Rui Ueyama <ruiu@cs.stanford.edu>
Date: Sat, 3 Aug 2019 11:29:50 +0900
Subject: [PATCH] Compile an integer to an exectuable that exits with the given
 number

---
 .gitignore |  5 +++++
 Makefile   | 12 ++++++++++++
 main.c     | 16 ++++++++++++++++
 test.sh    | 22 ++++++++++++++++++++++
 4 files changed, 55 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 main.c
 create mode 100755 test.sh

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b27256c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+*~
+*.o
+tmp*
+a.out
+chibicc
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..9fac1d6
--- /dev/null
+++ b/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
diff --git a/main.c b/main.c
new file mode 100644
index 0000000..cae6b4f
--- /dev/null
+++ b/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;
+}
diff --git a/test.sh b/test.sh
new file mode 100755
index 0000000..eb1e680
--- /dev/null
+++ b/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