--- a/build/build.ninja
+++ b/build/build.ninja
@@ -12,18 +12,18 @@
     3rd/bee.lua/compile/config.lua 3rd/bee.lua/compile/common.lua $
     make/code_format.lua
 rule c_source_bee
-  command = $cc -MMD -MT $out -MF $out.d -std=c11 -O2 -Wall -Werror $
+  command = $cc -MMD -MT $out -MF $out.d -std=c11 -Wall $
     -fvisibility=hidden -I3rd/bee.lua/3rd/lua-seri -I$builddir/lua54 $
-    -DNDEBUG -fPIC -o $out -c $in
+    -DNDEBUG -o $out -c $in CFLAGS
   description = Compile C   $out
   deps = gcc
   depfile = $out.d
 build $obj/source_bee/lua-seri.obj: c_source_bee $
     3rd/bee.lua/3rd/lua-seri/lua-seri.c
 rule cxx_source_bee
-  command = $cc -MMD -MT $out -MF $out.d -std=c++17 -fno-rtti -O2 -Wall $
-    -Werror -fvisibility=hidden -I3rd/bee.lua/bee/nonstd -DNDEBUG -fPIC -o $
-    $out -c $in
+  command = $cc -MMD -MT $out -MF $out.d -std=c++17 -fno-rtti -Wall $
+    -fvisibility=hidden -I3rd/bee.lua/bee/nonstd -DNDEBUG -o $
+    $out -c $in CXXFLAGS
   description = Compile C++ $out
   deps = gcc
   depfile = $out.d
@@ -31,8 +31,8 @@
     3rd/bee.lua/bee/nonstd/fmt/format.cc
 build $obj/source_bee/os.obj: cxx_source_bee 3rd/bee.lua/bee/nonstd/fmt/os.cc
 rule cxx_source_bee_1
-  command = $cc -MMD -MT $out -MF $out.d -std=c++17 -fno-rtti -O2 -Wall $
-    -Werror -fvisibility=hidden -I3rd/bee.lua -DNDEBUG -fPIC -o $out -c $in
+  command = $cc -MMD -MT $out -MF $out.d -std=c++17 -fno-rtti -Wall $
+    -fvisibility=hidden -I3rd/bee.lua -DNDEBUG -o $out -c $in CXXFLAGS
   description = Compile C++ $out
   deps = gcc
   depfile = $out.d
@@ -56,9 +56,9 @@
 build $obj/source_bee/path_helper.obj: cxx_source_bee_1 $
     3rd/bee.lua/bee/utility/path_helper.cpp
 rule cxx_source_bee_2
-  command = $cc -MMD -MT $out -MF $out.d -std=c++17 -fno-rtti -O2 -Wall $
-    -Werror -fvisibility=hidden -I3rd/bee.lua/3rd/lua-seri -I3rd/bee.lua $
-    -I$builddir/lua54 -DBEE_STATIC -DNDEBUG -fPIC -o $out -c $in
+  command = $cc -MMD -MT $out -MF $out.d -std=c++17 -fno-rtti -Wall $
+    -fvisibility=hidden -I3rd/bee.lua/3rd/lua-seri -I3rd/bee.lua $
+    -I$builddir/lua54 -DBEE_STATIC -DNDEBUG -o $out -c $in CXXFLAGS
   description = Compile C++ $out
   deps = gcc
   depfile = $out.d
@@ -79,26 +79,26 @@
 build $obj/source_bee/lua_time.obj: cxx_source_bee_2 $
     3rd/bee.lua/binding/lua_time.cpp
 rule c_source_lua
-  command = $cc -MMD -MT $out -MF $out.d -std=c11 -O2 -Wall -Werror $
-    -fvisibility=hidden -DNDEBUG -fPIC -o $out -c $in
+  command = $cc -MMD -MT $out -MF $out.d -std=c11 -Wall $
+    -fvisibility=hidden -DNDEBUG -o $out -c $in CFLAGS
   description = Compile C   $out
   deps = gcc
   depfile = $out.d
 build $obj/source_lua/utf8_crt.obj: c_source_lua $
     3rd/bee.lua/3rd/lua/utf8_crt.c
 rule c_source_lua_1
-  command = $cc -MMD -MT $out -MF $out.d -std=c11 -O2 -Wall -Werror $
-    -DMAKE_LIB -DLUA_USE_LINUX -DNDEBUG -fPIC -Wno-maybe-uninitialized -o $
-    $out -c $in
+  command = $cc -MMD -MT $out -MF $out.d -std=c11 -Wall $
+    -DMAKE_LIB -DLUA_USE_LINUX -DNDEBUG -Wno-maybe-uninitialized -o $
+    $out -c $in CFLAGS
   description = Compile C   $out
   deps = gcc
   depfile = $out.d
 build $obj/source_lua/linit.obj: c_source_lua_1 3rd/bee.lua/3rd/lua/linit.c
 build $obj/source_lua/onelua.obj: c_source_lua_1 3rd/bee.lua/3rd/lua/onelua.c
 rule cxx_source_bootstrap
-  command = $cc -MMD -MT $out -MF $out.d -std=c++17 -fno-rtti -O2 -Wall $
-    -Werror -fvisibility=hidden -I3rd/bee.lua/3rd/lua -I3rd/bee.lua $
-    -DLUA_USE_LINUX -DNDEBUG -fPIC -o $out -c $in
+  command = $cc -MMD -MT $out -MF $out.d -std=c++17 -fno-rtti -Wall $
+    -fvisibility=hidden -I3rd/bee.lua/3rd/lua -I3rd/bee.lua $
+    -DLUA_USE_LINUX -DNDEBUG -o $out -c $in CXXFLAGS
   description = Compile C++ $out
   deps = gcc
   depfile = $out.d
@@ -108,7 +108,7 @@
     3rd/bee.lua/bootstrap/progdir.cpp
 rule link_bootstrap
   command = $cc $in -o $out -lm -ldl -Wl,-E -lstdc++fs -pthread $
-    -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic -static-libgcc -s
+    -Wl,-Bstatic -lstdc++ -Wl,-Bdynamic -static-libgcc LDFLAGS
   description = Link    Exe $out
 build /bootstrap: link_bootstrap $obj/source_bootstrap/main.obj $
     $obj/source_bootstrap/progdir.obj $obj/source_bee/lua-seri.obj $