diff --git a/Makefile b/Makefile
index 746c778..ff49aff 100644
--- a/Makefile
+++ b/Makefile
@@ -13,6 +13,12 @@ TARGET ?= bpfel,bpfeb
 OUTPUT ?= dae
 MAX_MATCH_SET_LEN ?= 64
 CFLAGS := -DMAX_MATCH_SET_LEN=$(MAX_MATCH_SET_LEN) $(CFLAGS)
+NOSTRIP ?= n
+ifeq ($(strip $(NOSTRIP)),y)
+	STRIP_FLAG := -no-strip
+else
+	STRIP_FLAG := -strip=$(STRIP)
+endif
 
 # Get version from .git.
 date=$(shell git log -1 --format="%cd" --date=short | sed s/-//g)
@@ -35,7 +41,7 @@ clean-ebpf:
 
 # $BPF_CLANG is used in go:generate invocations.
 ebpf: export BPF_CLANG := $(CLANG)
-ebpf: export BPF_STRIP := $(STRIP)
+ebpf: export BPF_STRIP_FLAG := $(STRIP_FLAG)
 ebpf: export BPF_CFLAGS := $(CFLAGS)
 ebpf: export BPF_TARGET := $(TARGET)
 ebpf: clean-ebpf
diff --git a/control/control.go b/control/control.go
index 245d1dc..d462623 100644
--- a/control/control.go
+++ b/control/control.go
@@ -5,6 +5,4 @@
 
 package control
 
-// $BPF_CLANG, $BPF_STRIP, $BPF_CFLAGS, $BPF_TARGET are set by the Makefile.
-//go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc $BPF_CLANG -strip $BPF_STRIP -cflags $BPF_CFLAGS -target $BPF_TARGET bpf kern/tproxy.c -- -I./headers
-
+//go:generate go run github.com/cilium/ebpf/cmd/bpf2go -cc "$BPF_CLANG" "$BPF_STRIP_FLAG" -cflags "$BPF_CFLAGS" -target "$BPF_TARGET" bpf kern/tproxy.c -- -I./headers
diff --git a/control/control_plane.go b/control/control_plane.go
index 2f0e1c8..c667fee 100644
--- a/control/control_plane.go
+++ b/control/control_plane.go
@@ -58,7 +58,7 @@ type ControlPlane struct {
 	closed chan struct{}
 	ready  chan struct{}
 
-	muRealDomainSet sync.RWMutex
+	muRealDomainSet sync.Mutex
 	realDomainSet   *bloom.BloomFilter
 }
 
@@ -323,7 +323,7 @@ func NewControlPlane(
 		routingMatcher:   routingMatcher,
 		closed:           make(chan struct{}),
 		ready:            make(chan struct{}),
-		muRealDomainSet:  sync.RWMutex{},
+		muRealDomainSet:  sync.Mutex{},
 		realDomainSet:    bloom.NewWithEstimates(2048, 0.001),
 	}
 	defer func() {
@@ -478,21 +478,22 @@ func (c *ControlPlane) ChooseDialTarget(outbound consts.OutboundIndex, dst netip
 				dialMode = consts.DialMode_Domain
 			} else {
 				// Check if the domain is in real-domain set (bloom filter).
-				c.muRealDomainSet.RLock()
+				c.muRealDomainSet.Lock()
 				if c.realDomainSet.TestString(domain) {
-					c.muRealDomainSet.RUnlock()
+					c.muRealDomainSet.Unlock()
 					dialMode = consts.DialMode_Domain
 				} else {
-					c.muRealDomainSet.RUnlock()
+					c.muRealDomainSet.Unlock()
 					// Lookup A/AAAA to make sure it is a real domain.
 					ctx, cancel := context.WithTimeout(context.TODO(), 5*time.Second)
 					defer cancel()
+					// TODO: use DNS controller and re-route by control plane.
 					systemDns, err := netutils.SystemDns()
 					if err == nil {
 						if ip46, err := netutils.ResolveIp46(ctx, direct.SymmetricDirect, systemDns, domain, false, true); err == nil && (ip46.Ip4.IsValid() || ip46.Ip6.IsValid()) {
-							// Has NS records. It is a real domain.
+							// Has A/AAAA records. It is a real domain.
 							dialMode = consts.DialMode_Domain
-							// Add it to real domain set.
+							// Add it to real-domain set.
 							c.muRealDomainSet.Lock()
 							c.realDomainSet.AddString(domain)
 							c.muRealDomainSet.Unlock()
diff --git a/docs/getting-started/build-by-yourself.md b/docs/getting-started/build-by-yourself.md
index 48892cb..95cdb55 100644
--- a/docs/getting-started/build-by-yourself.md
+++ b/docs/getting-started/build-by-yourself.md
@@ -6,7 +6,7 @@
 
 ```shell
 clang >= 10
-llvm >= 10
+llvm >= 10 (optional)
 golang >= 1.18
 make
 ```
@@ -17,10 +17,17 @@ make
 git clone https://github.com/daeuniverse/dae.git
 cd dae
 git submodule update --init
-# Minimal dependency build:
-make GOFLAGS="-buildvcs=false" CC=clang
-# Or normal build:
-# make
+## Minimal dependency build
+make GOFLAGS="-buildvcs=false" CC=clang NOSTRIP=y
+
+## Normal build
+#make
+
+## Cross compile
+# To armv7 CPU architect:
+#make CGO_ENABLED=0 GOARCH=arm GOARM=7
+# To mips CPU architect:
+#make CGO_ENABLED=0 GOARCH=mips
 ```
 
 ## Run