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all: add support for GOARM

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This environment variable can be set to 5, 6, or 7 and controls which
ARM version (ARMv5, ARMv6, ARMv7) is used when compiling for GOARCH=arm.

I have picked the default value ARMv6, which I believe is supported on
most common single board computers including all Raspberry Pis. The
difference in code size is pretty big.

We could even go further and support ARMv4 if anybody is interested. It
should be pretty simple to add this if needed.
This commit is contained in:
Ayke van Laethem
2021-11-14 01:39:34 +01:00
committed by Ron Evans
parent 73ad825b67
commit 7cb44fb373
7 changed files with 80 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
main_test.go
+19 -7
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@@ -95,13 +95,13 @@ func TestCompiler(t *testing.T) {
if runtime.GOOS == "linux" {
t.Run("X86Linux", func(t *testing.T) {
runPlatTests(optionsFromOSARCH("linux", "386"), tests, t)
runPlatTests(optionsFromOSARCH("linux/386"), tests, t)
})
t.Run("ARMLinux", func(t *testing.T) {
runPlatTests(optionsFromOSARCH("linux", "arm"), tests, t)
runPlatTests(optionsFromOSARCH("linux/arm/6"), tests, t)
})
t.Run("ARM64Linux", func(t *testing.T) {
runPlatTests(optionsFromOSARCH("linux", "arm64"), tests, t)
runPlatTests(optionsFromOSARCH("linux/arm64"), tests, t)
})
t.Run("WebAssembly", func(t *testing.T) {
runPlatTests(optionsFromTarget("wasm"), tests, t)
@@ -125,6 +125,7 @@ func TestCompiler(t *testing.T) {
runTestWithConfig("stdlib.go", t, compileopts.Options{
GOOS: goenv.Get("GOOS"),
GOARCH: goenv.Get("GOARCH"),
GOARM: goenv.Get("GOARM"),
Opt: "1",
}, nil, nil)
})
@@ -136,6 +137,7 @@ func TestCompiler(t *testing.T) {
runTestWithConfig("print.go", t, compileopts.Options{
GOOS: goenv.Get("GOOS"),
GOARCH: goenv.Get("GOARCH"),
GOARM: goenv.Get("GOARM"),
Opt: "0",
}, nil, nil)
})
@@ -145,6 +147,7 @@ func TestCompiler(t *testing.T) {
runTestWithConfig("ldflags.go", t, compileopts.Options{
GOOS: goenv.Get("GOOS"),
GOARCH: goenv.Get("GOARCH"),
GOARM: goenv.Get("GOARM"),
GlobalValues: map[string]map[string]string{
"main": {
"someGlobal": "foobar",
@@ -200,15 +203,24 @@ func optionsFromTarget(target string) compileopts.Options {
// GOOS/GOARCH are only used if target == ""
GOOS: goenv.Get("GOOS"),
GOARCH: goenv.Get("GOARCH"),
GOARM: goenv.Get("GOARM"),
Target: target,
}
}
func optionsFromOSARCH(goos, goarch string) compileopts.Options {
return compileopts.Options{
GOOS: goos,
GOARCH: goarch,
// optionsFromOSARCH returns a set of options based on the "osarch" string. This
// string is in the form of "os/arch/subarch", with the subarch only sometimes
// being necessary. Examples are "darwin/amd64" or "linux/arm/7".
func optionsFromOSARCH(osarch string) compileopts.Options {
parts := strings.Split(osarch, "/")
options := compileopts.Options{
GOOS: parts[0],
GOARCH: parts[1],
}
if options.GOARCH == "arm" {
options.GOARM = parts[2]
}
return options
}
func runTest(name string, options compileopts.Options, t *testing.T, cmdArgs, environmentVars []string) {