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golang on Fedora 30 … and beyond.

• golang
  • golang-src
  • golang-bin
  • go-srpm-macros
• dep

GOARCH="amd64"
GOBIN=""
GOCACHE="/home/rpjday/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/rpjday/go"               [personal workspace]
GOPROXY=""
GORACE=""
GOROOT="/usr/lib/golang"               [Go installation workspace]
GOTMPDIR=""
GOTOOLDIR="/usr/lib/golang/pkg/tool/linux_amd64"
GCCGO="gccgo"
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-build215138165=/tmp/go-build -gno-record-gcc-switches"

• env vars
  • GOPATH (workspace)
  • GOROOT (install dir)
• “factored” import statement
• uppercase symbols are automatically exported (math.Pi)
• functions
  • return type *trails* function prototype
  • no need to duplicate consecutive arg types (x, y int)
  • multiple return values “(string, int)”
  • named return values “func split(sum int) (x, y int) {”
• variables
  • “var c, python, java bool”
  • initializers “var i, j int = 10, 20”
  • short implicit in-function form “k := 3”
• type conversions are necessary
• loops
  • for [init] ; cond ; [iter] {
  • for cond { [“while”]