build: use -trimpath in non-DBG mode

hack/lib/golang.sh

@@ -748,7 +748,7 @@ kube::golang::build_binaries_for_platform() {
   done
 
   V=2 kube::log::info "Env for ${platform}: GOOS=${GOOS-} GOARCH=${GOARCH-} GOROOT=${GOROOT-} CGO_ENABLED=${CGO_ENABLED-} CC=${CC-}"
-  V=3 kube::log::info "Building binaries with GCFLAGS=${gogcflags} ASMFLAGS=${goasmflags} LDFLAGS=${goldflags}"
+  V=3 kube::log::info "Building binaries with GCFLAGS=${gogcflags} LDFLAGS=${goldflags}"
 
   local -a build_args
   if [[ "${#statics[@]}" != 0 ]]; then
@@ -756,7 +756,6 @@ kube::golang::build_binaries_for_platform() {
       -installsuffix=static
       ${goflags:+"${goflags[@]}"}
       -gcflags="${gogcflags}"
-      -asmflags="${goasmflags}"
       -ldflags="${goldflags}"
       -tags="${gotags:-}"
     )
@@ -767,7 +766,6 @@ kube::golang::build_binaries_for_platform() {
     build_args=(
       ${goflags:+"${goflags[@]}"}
       -gcflags="${gogcflags}"
-      -asmflags="${goasmflags}"
       -ldflags="${goldflags}"
       -tags="${gotags:-}"
     )
@@ -783,7 +781,6 @@ kube::golang::build_binaries_for_platform() {
     go test -c \
       ${goflags:+"${goflags[@]}"} \
       -gcflags="${gogcflags}" \
-      -asmflags="${goasmflags}" \
       -ldflags="${goldflags}" \
       -tags="${gotags:-}" \
       -o "${outfile}" \
@@ -840,26 +837,19 @@ kube::golang::build_binaries() {
     # These are "local" but are visible to and relied on by functions this
     # function calls.  They are effectively part of the calling API to
     # build_binaries_for_platform.
-    local goflags goldflags goasmflags gogcflags gotags
+    local goflags goldflags gogcflags gotags
 
-    # This is $(pwd) because we use run-in-gopath to build.  Once that is
-    # excised, this can become ${KUBE_ROOT}.
-    local trimroot # two lines to appease shellcheck SC2155
-    trimroot=$(pwd)
+    goflags=()
+    gogcflags="${GOGCFLAGS:-}"
+    goldflags="all=$(kube::version::ldflags) ${GOLDFLAGS:-}"
 
-    goasmflags="all=-trimpath=${trimroot}"
-
-    gogcflags="all=-trimpath=${trimroot} ${GOGCFLAGS:-}"
     if [[ "${DBG:-}" == 1 ]]; then
         # Debugging - disable optimizations and inlining and trimPath
-        gogcflags="${GOGCFLAGS:-} all=-N -l"
-        goasmflags=""
-    fi
-
-    goldflags="all=$(kube::version::ldflags) ${GOLDFLAGS:-}"
-    if [[ "${DBG:-}" != 1 ]]; then
-        # Not debugging - disable symbols and DWARF.
+        gogcflags="${gogcflags} all=-N -l"
+    else
+        # Not debugging - disable symbols and DWARF, trim embedded paths
         goldflags="${goldflags} -s -w"
+        goflags+=("-trimpath")
     fi
 
     # Extract tags if any specified in GOFLAGS