From 0b28aa24011e9552e6b5e6ffd94353355f97f9f8 Mon Sep 17 00:00:00 2001
From: Brendan Hansen <brendan.f.hansen@gmail.com>
Date: Thu, 17 Mar 2022 22:52:20 -0500
Subject: [PATCH] added architecture compile time variable

---
 core/runtime/build_opts.onyx |  8 ++++++++
 src/builtins.c               | 20 ++++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/core/runtime/build_opts.onyx b/core/runtime/build_opts.onyx
index 1016bdb9..ad0feca2 100644
--- a/core/runtime/build_opts.onyx
+++ b/core/runtime/build_opts.onyx
@@ -12,4 +12,12 @@ Runtime :: enum {
 OS :: enum {
     Linux       :: 1;
     Windows     :: 2;
+}
+
+// arch: Arch         This is set by the compiler.
+Arch :: enum {
+    Unknown     :: 0;
+    X86_64      :: 1;
+    X86_32      :: 2;
+    AARCH64     :: 3;
 }
\ No newline at end of file
diff --git a/src/builtins.c b/src/builtins.c
index 98dacf4d..94d412ed 100644
--- a/src/builtins.c
+++ b/src/builtins.c
@@ -511,5 +511,25 @@ void introduce_build_options(bh_allocator a) {
     os_type->type_node = OS_Type;
     add_entities_for_node(NULL, (AstNode *) os_type, NULL, NULL);
     symbol_builtin_introduce(p->scope, "compiler_os", (AstNode *) os_type);
+
+    i32 arch = 0;
+    #if defined(__x86_64__) || defined(_M_X64)
+        arch = 1; // X86_64;
+    #elif defined(i386) || defined(__i386__) || defined(__i386) || defined(_M_IX86)
+        arch = 2; // X86_32;
+    #elif defined(__aarch64__) || defined(_M_ARM64)
+        arch = 3; // AARCH64;
+    #endif
+
+    AstType* Arch_Type = (AstType *) symbol_raw_resolve(p->scope, "Arch");
+    if (Arch_Type == NULL) {
+        onyx_report_error((OnyxFilePos) {0}, Error_Critical, "'Arch' type not found in package runtime.");
+        return;
+    }
+
+    AstNumLit* arch_type = make_int_literal(a, arch);
+    arch_type->type_node = Arch_Type;
+    add_entities_for_node(NULL, (AstNode *) arch_type, NULL, NULL);
+    symbol_builtin_introduce(p->scope, "arch", (AstNode *) arch_type);
 }
 
-- 
2.25.1