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tool/gocross: treat empty GOOS/GOARCH as native GOOS/GOARCH

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Tracking down the side effect can otherwise be a pain, for example on
Darwin an empty GOOS resulted in CGO being implicitly disabled. The user
intended for `export GOOS=` to act like unset, and while this is a
misunderstanding, the main toolchain would treat it this way.

Fixes tailscale/corp#20059

Signed-off-by: James Tucker <james@tailscale.com>
This commit is contained in:
James Tucker
2024-05-16 10:53:44 -07:00
committed by James Tucker
parent 76c30e014d
commit 87f00d76c4
2 changed files with 61 additions and 2 deletions
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58
tool/gocross/autoflags_test.go
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@@ -275,6 +275,64 @@ GOMIPS=softfloat (was <nil>)
GOOS=darwin (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,omitidna,omitpemdecrypt",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg",
"./cmd/tailcontrol",
},
},
{
name: "darwin_arm64_to_darwin_arm64_empty_goos",
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
env: map[string]string{
"GOOS": "",
},
goroot: "/goroot",
nativeGOOS: "darwin",
nativeGOARCH: "arm64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=arm64 (was <nil>)
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=darwin (was )
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",
"-trimpath",
"-tags=tailscale_go,omitidna,omitpemdecrypt",
"-ldflags", "-X tailscale.com/version.longStamp=1.2.3-long -X tailscale.com/version.shortStamp=1.2.3 -X tailscale.com/version.gitCommitStamp=abcd -X tailscale.com/version.extraGitCommitStamp=defg",
"./cmd/tailcontrol",
},
},
{
name: "darwin_arm64_to_darwin_arm64_empty_goarch",
argv: []string{"gocross", "build", "./cmd/tailcontrol"},
env: map[string]string{
"GOARCH": "",
},
goroot: "/goroot",
nativeGOOS: "darwin",
nativeGOARCH: "arm64",
envDiff: `CC=cc (was <nil>)
CGO_CFLAGS=-O3 -std=gnu11 (was <nil>)
CGO_ENABLED=1 (was <nil>)
CGO_LDFLAGS= (was <nil>)
GOARCH=arm64 (was )
GOARM=5 (was <nil>)
GOMIPS=softfloat (was <nil>)
GOOS=darwin (was <nil>)
GOROOT=/goroot (was <nil>)
GOTOOLCHAIN=local (was <nil>)
TS_LINK_FAIL_REFLECT=0 (was <nil>)`,
wantArgv: []string{
"gocross", "build",