all: add race build mode

Makefile

@@ -15,6 +15,7 @@ GPG_KEY = [email protected]
 GPG_KEY_PASSPHRASE = not-a-real-password
 NPM = npm
 NPM_FLAGS = --prefix $(CLIENT_DIR)
+RACE = 0
 SIGN = 1
 VERBOSE = 0
 VERSION = v0.0.0
@@ -30,6 +31,7 @@ ENV = env\
 	GO='$(GO)'\
 	GOPROXY='$(GOPROXY)'\
 	PATH="$${PWD}/bin:$$($(GO) env GOPATH)/bin:$${PATH}"\
+	RACE='$(RACE)'\
 	SIGN='$(SIGN)'\
 	VERBOSE='$(VERBOSE)'\
 	VERSION='$(VERSION)'\

scripts/make/go-build.sh

@@ -91,10 +91,22 @@ else
 	readonly out_flags=''
 fi
 
-# Don't use cgo.  Use modules.
-export CGO_ENABLED='0' GO111MODULE='on'
+# Allow users to enable the race detector.  Unfortunately, that means
+# that CGo must be enabled.
+readonly race="${RACE:-0}"
+if [ "$race" = '0' ]
+then
+	readonly cgo_enabled='0'
+	readonly race_flags=''
+else
+	readonly cgo_enabled='1'
+	readonly race_flags='--race'
+fi
+
+export CGO_ENABLED="$cgo_enabled"
+export GO111MODULE='on'
 
-readonly build_flags="${BUILD_FLAGS:-$out_flags $par_flags\
+readonly build_flags="${BUILD_FLAGS:-$race_flags $out_flags $par_flags\
 	$v_flags $x_flags}"
 
 # Don't use quotes with flag variables to get word splitting.