manual c function interop

compiler/compiler.odin

@@ -3,6 +3,7 @@ package compiler
 import "./backend"
 import "./checker"
 import "./llvm"
+import "./linker"
 import "./loader"
 import "./lower"
 import "./opt"
@@ -13,7 +14,7 @@ import vmem "core:mem/virtual"
 import "core:os"
 import "core:os/os2"
 
-compile_package :: proc(input_path, output_path: string) -> int {
+compile_package :: proc(input_path, output_path: string, link_arguments: []linker.Argument = nil) -> int {
 	sources := source.init_store()
 	defer source.destroy_store(&sources)
 	diagnostics := source.init_store_diagnostics(&sources)
@@ -76,7 +77,7 @@ compile_package :: proc(input_path, output_path: string) -> int {
 	}
 
 	source.print_all(&diagnostics)
-	if !backend.compile(llvm_path, output_path) {
+	if !backend.compile(llvm_path, output_path, link_arguments) {
 		return 2
 	}
 	if len(diagnostics.items) > 0 {