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Viewing file:     version_build_settings.txt (2.74 KB)      -rw-r--r--

[short] skip

# Compiler name is always added.
go build
go version -m m$GOEXE
stdout '^\tbuild\t-compiler=gc$'
stdout '^\tbuild\tGOOS='
stdout '^\tbuild\tGOARCH='
[GOARCH:amd64] stdout '^\tbuild\tGOAMD64='
! stdout asmflags|gcflags|ldflags|gccgoflags

# Toolchain flags are added if present.
# The raw flags are included, with package patterns if specified.
go build -asmflags=example.com/m=-D=FOO=bar
go version -m m$GOEXE
stdout '^\tbuild\t-asmflags=example\.com/m=-D=FOO=bar$'

go build -gcflags=example.com/m=-N
go version -m m$GOEXE
stdout '^\tbuild\t-gcflags=example\.com/m=-N$'

go build -ldflags=example.com/m=-w
go version -m m$GOEXE
stdout '^\tbuild\t-ldflags=example\.com/m=-w$'

go build -trimpath
go version -m m$GOEXE
stdout '\tbuild\t-trimpath=true$'

# gccgoflags are not added when gc is used, and vice versa.
# TODO: test gccgo.
go build -gccgoflags=all=UNUSED
go version -m m$GOEXE
! stdout gccgoflags

# Build and tool tags are added but not release tags.
# "race" is included with build tags but not "cgo".
go build -tags=a,b
go version -m m$GOEXE
stdout '^\tbuild\t-tags=a,b$'
[race] go build -race
[race] go version -m m$GOEXE
[race] ! stdout '^\tbuild\t-tags='
[race] stdout '^\tbuild\t-race=true$'

# CGO flags are separate settings.
# CGO_ENABLED is always present.
# Other flags are added if CGO_ENABLED is true.
env CGO_ENABLED=0
go build
go version -m m$GOEXE
stdout '^\tbuild\tCGO_ENABLED=0$'
! stdout CGO_CPPFLAGS|CGO_CFLAGS|CGO_CXXFLAGS|CGO_LDFLAGS

[cgo] env CGO_ENABLED=1
[cgo] env CGO_CPPFLAGS=-DFROM_CPPFLAGS=1
[cgo] env CGO_CFLAGS=-DFROM_CFLAGS=1
[cgo] env CGO_CXXFLAGS=-DFROM_CXXFLAGS=1
[cgo] env CGO_LDFLAGS=-L/extra/dir/does/not/exist
[cgo] go build '-ldflags=all=-linkmode=external -extldflags=-L/bonus/dir/does/not/exist'
[cgo] go version -m m$GOEXE
[cgo] stdout '^\tbuild\t-ldflags="all=-linkmode=external -extldflags=-L/bonus/dir/does/not/exist"$'
[cgo] stdout '^\tbuild\tCGO_ENABLED=1$'
[cgo] stdout '^\tbuild\tCGO_CPPFLAGS=-DFROM_CPPFLAGS=1$'
[cgo] stdout '^\tbuild\tCGO_CFLAGS=-DFROM_CFLAGS=1$'
[cgo] stdout '^\tbuild\tCGO_CXXFLAGS=-DFROM_CXXFLAGS=1$'
[cgo] stdout '^\tbuild\tCGO_LDFLAGS=-L/extra/dir/does/not/exist$'

# https://go.dev/issue/52372: a cgo-enabled binary should not be stamped with
# CGO_ flags that contain paths.
[cgo] env CGO_ENABLED=1
[cgo] env CGO_CPPFLAGS=-DFROM_CPPFLAGS=1
[cgo] env CGO_CFLAGS=-DFROM_CFLAGS=1
[cgo] env CGO_CXXFLAGS=-DFROM_CXXFLAGS=1
[cgo] env CGO_LDFLAGS=-L/extra/dir/does/not/exist
[cgo] go build -trimpath '-ldflags=all=-linkmode=external -extldflags=-L/bonus/dir/does/not/exist'
[cgo] go version -m m$GOEXE
[cgo] ! stdout '/extra/dir/does/not/exist'
[cgo] ! stdout '/bonus/dir/does/not/exist'
[cgo] stdout '^\tbuild\tCGO_ENABLED=1$'

-- go.mod --
module example.com/m

go 1.18
-- m.go --
package main

func main() {}