Go - go build -ldflags

# download dependencies and build
RUN go mod download
RUN CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -ldflags="-s -w" -o /go/bin/server

zzh@ZZHPC:~/aaa$ go build -ldflags="-help" ./main.go
# command-line-arguments
usage: link [options] main.o
  -B note
    	add an ELF NT_GNU_BUILD_ID note when using ELF; use "gobuildid" to generate it from the Go build ID
  -E entry
    	set entry symbol name
  -H type
    	set header type
  -I linker
    	use linker as ELF dynamic linker
  -L directory
    	add specified directory to library path
  -R quantum
    	set address rounding quantum (default -1)
  -T int
    	set the start address of text symbols (default -1)
  -V	print version and exit
  -X definition
    	add string value definition of the form importpath.name=value
  -a	no-op (deprecated)
  -asan
    	enable ASan interface
  -aslr
    	enable ASLR for buildmode=c-shared on windows (default true)
  -benchmark string
    	set to 'mem' or 'cpu' to enable phase benchmarking
  -benchmarkprofile base
    	emit phase profiles to base_phase.{cpu,mem}prof
  -buildid id
    	record id as Go toolchain build id
  -buildmode mode
    	set build mode
  -c	dump call graph
  -capturehostobjs string
    	capture host object files loaded during internal linking to specified dir
  -compressdwarf
    	compress DWARF if possible (default true)
  -cpuprofile file
    	write cpu profile to file
  -d	disable dynamic executable
  -debugnosplit
    	dump nosplit call graph
  -debugtextsize int
    	debug text section max size
  -debugtramp int
    	debug trampolines
  -dumpdep
    	dump symbol dependency graph
  -extar string
    	archive program for buildmode=c-archive
  -extld linker
    	use linker when linking in external mode
  -extldflags flags
    	pass flags to external linker
  -f	ignore version mismatch
  -g	disable go package data checks
  -h	halt on error
  -importcfg file
    	read import configuration from file
  -installsuffix suffix
    	set package directory suffix
  -k symbol
    	set field tracking symbol
  -libgcc string
    	compiler support lib for internal linking; use "none" to disable
  -linkmode mode
    	set link mode
  -linkshared
    	link against installed Go shared libraries
  -memprofile file
    	write memory profile to file
  -memprofilerate rate
    	set runtime.MemProfileRate to rate
  -msan
    	enable MSan interface
  -n	no-op (deprecated)
  -o file
    	write output to file
  -pluginpath string
    	full path name for plugin
  -pruneweakmap
    	prune weak mapinit refs (default true)
  -r path
    	set the ELF dynamic linker search path to dir1:dir2:...
  -race
    	enable race detector
  -s	disable symbol table
  -strictdups int
    	sanity check duplicate symbol contents during object file reading (1=warn 2=err).
  -tmpdir directory
    	use directory for temporary files
  -v	print link trace
  -w	disable DWARF generation