env GO111MODULE=off [!compiler:gc] skip 'using -gcflags and -ldflags' [short] skip # -gcflags=-e applies to named packages, not dependencies go build -a -n -v -gcflags=-e z1 z2 stderr 'compile.* -p z1.* -e ' stderr 'compile.* -p z2.* -e ' stderr 'compile.* -p y' ! stderr 'compile.* -p [^z].* -e ' # -gcflags can specify package=flags, and can be repeated; last match wins go build -a -n -v -gcflags=-e -gcflags=z1=-N z1 z2 stderr 'compile.* -p z1.* -N ' ! stderr 'compile.* -p z1.* -e ' ! stderr 'compile.* -p z2.* -N ' stderr 'compile.* -p z2.* -e ' stderr 'compile.* -p y' ! stderr 'compile.* -p [^z].* -e ' ! stderr 'compile.* -p [^z].* -N ' # -gcflags can have arbitrary spaces around the flags go build -a -n -v -gcflags=' z1 = -e ' z1 stderr 'compile.* -p z1.* -e ' # -gcflags='all=-e' should apply to all packages, even with go test go test -a -c -n -gcflags='all=-e' z1 stderr 'compile.* -p z3.* -e ' # this particular -gcflags argument made the compiler crash ! go build -gcflags=-d=ssa/ z1 stderr 'PhaseOptions usage' # check for valid -ldflags parameter ! go build '-ldflags="-X main.X=Hello"' stderr 'invalid value' # -ldflags for implicit test package applies to test binary go test -a -c -n -gcflags=-N -ldflags=-X=x.y=z z1 stderr 'compile.* -N .*z_test.go' stderr 'link.* -X=x.y=z' # -ldflags for explicit test package applies to test binary go test -a -c -n -gcflags=z1=-N -ldflags=z1=-X=x.y=z z1 stderr 'compile.* -N .*z_test.go' stderr 'link.* -X=x.y=z' # -ldflags applies to link of command go build -a -n -ldflags=-X=math.pi=3 my/cmd/prog stderr 'link.* -X=math.pi=3' # -ldflags applies to link of command even with strange directory name go build -a -n -ldflags=-X=math.pi=3 my/cmd/prog/ stderr 'link.* -X=math.pi=3' # -ldflags applies to current directory cd my/cmd/prog go build -a -n -ldflags=-X=math.pi=3 stderr 'link.* -X=math.pi=3' # -ldflags applies to current directory even if GOPATH is funny [!case-sensitive] cd $WORK/GoPath/src/my/cmd/prog go build -a -n -ldflags=-X=math.pi=3 stderr 'link.* -X=math.pi=3' # cgo.a should not be a dependency of internally-linked go package go build -ldflags='-linkmode=external -linkmode=internal' -n prog.go ! stderr 'packagefile .*runtime/cgo.a' -- z1/z.go -- package z1 import _ "y" import _ "z2" -- z1/z_test.go -- package z1_test import "testing" import _ "z3" func Test(t *testing.T) {} -- z2/z.go -- package z2 -- z3/z.go -- package z3 -- y/y.go -- package y -- my/cmd/prog/prog.go -- package main func main() {}