diff --git a/Makefile b/Makefile
index 980e9ff..27e1770 100644
--- a/Makefile
+++ b/Makefile
@@ -25,13 +25,13 @@ MRUBY_CFLAGS ?= -I./libs/mruby/build/host/include
 MRUBY_LIBS ?= -L./libs/mruby/build/host/lib -lmruby
 
 CFLAGS_DEBUG :=\
-	-std=c++26 -Wall -Wextra \
-	-O0 -fno-inline -gsplit-dwarf \
+	-std=c++20 -Wall -Wextra -fno-rtti \
+	-Og -fno-inline -gsplit-dwarf \
 	-g -fno-omit-frame-pointer -ffast-math \
 	-I./include -I./libs/unicode_width
 
 CFLAGS_RELEASE :=\
-	-std=c++26 -O3 -march=x86-64 -mtune=generic -fno-rtti \
+	-std=c++20 -O3 -mtune=generic -fno-rtti \
 	-fvisibility=hidden -static -ffast-math \
 	-fomit-frame-pointer -DNDEBUG -s \
 	-I./include -I./libs/unicode_width
@@ -77,6 +77,7 @@ $(TARGET_DEBUG): $(PCH_DEBUG) $(OBJ_DEBUG) $(UNICODE_OBJ)
 $(TARGET_RELEASE): $(PCH_RELEASE) $(OBJ_RELEASE) $(UNICODE_OBJ)
 	@mkdir -p $(BIN_DIR)
 	@$(CXX) $(CFLAGS_RELEASE) -o $@ $(OBJ_RELEASE) $(UNICODE_OBJ) $(LIBS)
+	@strip $@
 	@echo "Release build complete: $@"
 
 $(OBJ_DIR)/debug/%.o: $(SRC_DIR)/%.cc $(PCH_DEBUG) $(GENERATED_HEADER)
diff --git a/flake.nix b/flake.nix
index 98a955a..502e229 100644
--- a/flake.nix
+++ b/flake.nix
@@ -59,6 +59,7 @@
           xxd
           bash
           findutils
+          binutils
         ];
 
         buildInputs = with pkgs; [
diff --git a/include/pch.h b/include/pch.h
index 6d3f2b1..ced4c6c 100644
--- a/include/pch.h
+++ b/include/pch.h
@@ -29,7 +29,6 @@ extern "C" {
 #include <filesystem>
 #include <fstream>
 #include <functional>
-#include <immintrin.h>
 #include <iostream>
 #include <limits.h>
 #include <map>
@@ -51,4 +50,5 @@ extern "C" {
 #include <unistd.h>
 #include <unordered_map>
 #include <unordered_set>
+#include <variant>
 #include <vector>
diff --git a/src/main.cc b/src/main.cc
index 2cee90b..59c2721 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -3,15 +3,26 @@
 #include "vase/shard.h"
 #include "vase/vase.h"
 
-int main() {
-  const char *text_o =
+int main(int argc, char *argv[]) {
+  /*const char *text_o =
     "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz\n"
     "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz\n"
     "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz\n"
     "abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz";
 
   uint32_t len = strlen(text_o);
-  char *text = strdup(text_o);
+  char *text = strdup(text_o);*/
+
+  const char *path;
+
+  if (argc >= 2)
+    path = argv[1];
+  else
+    throw "Please give filename.";
+
+  uint32_t len;
+  char *text;
+  read_file(path, &text, &len);
 
   Vase vase = Vase(text, len);