Merge pull request #26 from Vexu/codegen

Add codegen

.gitattributes

@@ -1 +1,3 @@
 *.zig text eol=lf
+
+deps/** linguist-vendored

README.md

@@ -1,9 +1,23 @@
 # Aro
 A C compiler with the goal of providing fast compilation and low memory usage with good diagnostics.
 
-Currently it can preprocess, parse and semantically analyze ~75% of standard C17 with 
+Currently it can preprocess, parse and semantically analyze ~85% of standard C17 with 
 work still being needed to support all of the usual extensions.
 
+Basic code generation is supported for x86-64 linux and can produce a valid hello world:
+```shell
+$ cat hello.c
+extern int printf(const char *restrict fmt, ...);
+int main(void) {
+    pritnf("Hello, world!\n");
+    return 0;
+}
+$ zig build run -- hello.c -c
+$ zig run hello.o -lc
+Hello, world!
+$
+```
+
 Future plans for the project include making it the C backend of Zig's `translate-c` feature and
 making it an optional C frontend for the self-hosted Zig compiler.
 ```c
@@ -50,4 +64,4 @@ fn_def: 'fn (argc: int, argv: **const char) int'
                  value: 4
 
 ```
-<sup>types are printed in Zig style as C types are more confusing than necessary</sup>
+<sup>types are printed in Zig style as C types are more confusing than necessary, actual error messages contain proper C like types</sup>

build.zig

@@ -12,9 +12,15 @@ pub fn build(b: *Builder) void {
     // between Debug, ReleaseSafe, ReleaseFast, and ReleaseSmall.
     const mode = b.standardReleaseOptions();
 
+    const zig_pkg = std.build.Pkg{
+        .name = "zig",
+        .path = .{ .path = "deps/zig/lib.zig" },
+    };
+
     const exe = b.addExecutable("arocc", "src/main.zig");
     exe.setTarget(target);
     exe.setBuildMode(mode);
+    exe.addPackage(zig_pkg);
     exe.install();
 
     const run_cmd = exe.run();
@@ -30,12 +36,18 @@ pub fn build(b: *Builder) void {
     tests_step.dependOn(&exe.step);
 
     var unit_tests = b.addTest("src/main.zig");
+    unit_tests.addPackage(zig_pkg);
     tests_step.dependOn(&unit_tests.step);
 
     const integration_tests = b.addExecutable("arocc", "test/runner.zig");
-    integration_tests.addPackagePath("aro", "src/lib.zig");
+    integration_tests.addPackage(.{
+        .name = "aro",
+        .path = .{ .path = "src/lib.zig" },
+        .dependencies = &.{zig_pkg},
+    });
 
     const integration_test_runner = integration_tests.run();
     integration_test_runner.addArg(b.pathFromRoot("test/cases"));
+    integration_test_runner.addArg(b.zig_exe);
     tests_step.dependOn(&integration_test_runner.step);
 }