cmd/link: should log searching directory

[qingyunha]

What version of Go are you using (go version)?

$ go version
go version go1.13 linux/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOENV="/root/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GONOPROXY=""
GONOSUMDB="*.ctripcorp.com"
GOOS="linux"
GOPATH="/root/go"
GOPRIVATE=""
GOPROXY="https://goproxy.io,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build028007412=/tmp/go-build -gno-record-gcc-switches"

What did you do?

$ go tool link -v main.o 
HEADER = -H5 -T0x401000 -R0x1000
searching for runtime.a in /usr/local/go/pkg/linux_amd64/runtime.a
 0.00 deadcode
 0.02 symsize = 0
 0.03 pclntab=251242 bytes, funcdata total 57287 bytes
 0.04 dodata
 0.04 dwarf
 0.11 asmb
 0.11 codeblk
 0.12 rodatblk
 0.12 datblk
 0.12 reloc
 0.12 sym
 0.12 symsize = 2688
 0.13 symsize = 34560
 0.13 dwarf
 0.13 headr
 0.13 cpu time
21167 symbols
34132 liveness data

What did you expect to see?

searching for runtime.a in /usr/local/go/pkg/linux_amd64/

What did you see instead?

searching for runtime.a in /usr/local/go/pkg/linux_amd64/runtime.a

[gopherbot]

Change https://golang.org/cl/211817 mentions this issue: cmd/link: log searching directory instead of full pathname

[dmitshur]

/cc @mwhudson @thanm per owners.

Also /cc @ianlancetaylor since you already looked at the CL that fixes this issue.