diff --git a/reid-llvm-lib/src/compile.rs b/reid-llvm-lib/src/compile.rs
index e393025..521fb94 100644
--- a/reid-llvm-lib/src/compile.rs
+++ b/reid-llvm-lib/src/compile.rs
@@ -56,6 +56,8 @@ impl Drop for LLVMContext {
 pub struct CompiledModule {
     module_ref: LLVMModuleRef,
     _context: LLVMContext,
+    cpu: String,
+    features: String,
 }
 
 pub struct CompileOutput {
@@ -84,8 +86,8 @@ impl CompiledModule {
             let target_machine = LLVMCreateTargetMachine(
                 target,
                 triple,
-                c"generic".as_ptr(),
-                c"".as_ptr(),
+                into_cstring(self.cpu.clone()).as_ptr(),
+                into_cstring(self.features.clone()).as_ptr(),
                 llvm_sys::target_machine::LLVMCodeGenOptLevel::LLVMCodeGenLevelLess,
                 llvm_sys::target_machine::LLVMRelocMode::LLVMRelocDefault,
                 llvm_sys::target_machine::LLVMCodeModel::LLVMCodeModelDefault,
@@ -142,7 +144,7 @@ impl CompiledModule {
 }
 
 impl Context {
-    pub fn compile(&self) -> CompiledModule {
+    pub fn compile(&self, cpu: Option<String>, features: Vec<String>) -> CompiledModule {
         unsafe {
             let context_ref = LLVMContextCreate();
 
@@ -173,6 +175,8 @@ impl Context {
             CompiledModule {
                 module_ref: main_module_ref,
                 _context: context,
+                cpu: cpu.unwrap_or("generic".to_owned()),
+                features: features.join(","),
             }
         }
     }
diff --git a/reid/examples/cli.rs b/reid/examples/cli.rs
index 89fad8f..a39a9c4 100644
--- a/reid/examples/cli.rs
+++ b/reid/examples/cli.rs
@@ -25,7 +25,10 @@ fn main() -> Result<(), std::io::Error> {
 
         let text = fs::read_to_string(&path)?;
 
-        match compile_simple(&text, PathBuf::from(&path)) {
+        let cpu = std::env::var("CPU").unwrap_or("generic".to_owned());
+        let features = std::env::var("REIDFLAGS").unwrap_or("".to_owned());
+
+        match compile_simple(&text, PathBuf::from(&path), Some(cpu), vec![features]) {
             Ok((
                 CompileOutput {
                     triple,
diff --git a/reid/src/codegen.rs b/reid/src/codegen.rs
index aa0bc2a..ee0f259 100644
--- a/reid/src/codegen.rs
+++ b/reid/src/codegen.rs
@@ -19,12 +19,9 @@ use crate::{
     intrinsics::IntrinsicFunction,
     lexer::{FullToken, Position},
     mir::{
-        self,
-        implement::TypeCategory,
-        pass::{ScopeBinopDef, ScopeBinopKey},
-        CustomTypeKey, FunctionDefinitionKind, Metadata, NamedVariableRef, SourceModuleId,
-        StructField, StructType, TypeDefinition, TypeDefinitionKind, TypeKind, VagueLiteral,
-        WhileStatement,
+        self, implement::TypeCategory, pass::ScopeBinopKey, CustomTypeKey, FunctionDefinitionKind,
+        Metadata, NamedVariableRef, SourceModuleId, StructField, StructType, TypeDefinition,
+        TypeDefinitionKind, TypeKind, VagueLiteral, WhileStatement,
     },
     util::try_all,
 };
@@ -45,8 +42,8 @@ pub struct CodegenContext<'ctx> {
 impl<'ctx> CodegenContext<'ctx> {
     /// Compile contained LLIR into LLVM IR and produce `hello.o` and
     /// `hello.asm`
-    pub fn compile(&self) -> CompiledModule {
-        self.context.compile()
+    pub fn compile(&self, cpu: Option<String>, features: Vec<String>) -> CompiledModule {
+        self.context.compile(cpu, features)
     }
 }
 
diff --git a/reid/src/lib.rs b/reid/src/lib.rs
index 3fc9547..40230fd 100644
--- a/reid/src/lib.rs
+++ b/reid/src/lib.rs
@@ -216,6 +216,8 @@ pub fn compile_and_pass<'map>(
     source: &str,
     path: PathBuf,
     module_map: &'map mut ErrorModules,
+    cpu: Option<String>,
+    features: Vec<String>,
 ) -> Result<(CompileOutput, CustomIRs), ReidError> {
     let path = path.canonicalize().unwrap();
     let name = path.file_name().unwrap().to_str().unwrap().to_owned();
@@ -241,7 +243,7 @@ pub fn compile_and_pass<'map>(
     #[cfg(debug_assertions)]
     println!("{}", &codegen_modules.context);
 
-    let compiled = codegen_modules.compile();
+    let compiled = codegen_modules.compile(cpu, features);
     Ok((
         compiled.output(),
         CustomIRs {
@@ -259,7 +261,9 @@ pub struct CustomIRs {
 pub fn compile_simple(
     source: &str,
     path: PathBuf,
+    cpu: Option<String>,
+    features: Vec<String>,
 ) -> Result<(CompileOutput, CustomIRs), ReidError> {
     let mut map = ErrorModules::default();
-    compile_and_pass(source, path, &mut map)
+    compile_and_pass(source, path, &mut map, cpu, features)
 }
diff --git a/reid/tests/e2e.rs b/reid/tests/e2e.rs
index d2aa144..a11940d 100644
--- a/reid/tests/e2e.rs
+++ b/reid/tests/e2e.rs
@@ -30,7 +30,7 @@ fn test(source: &str, name: &str, expected_exit_code: Option<i32>) {
 
         let codegen = assert_err(mir_context.codegen(&context));
 
-        let output = codegen.compile().output();
+        let output = codegen.compile(None, Vec::new()).output();
         let time = SystemTime::now();
         let in_path = PathBuf::from(format!(
             "/tmp/temp-{}.o",