cross compilation

internal/xtool/llvm/llvm_test.go

@@ -0,0 +1,150 @@
+//go:build !llgo
+// +build !llgo
+
+package llvm
+
+import (
+	"os/exec"
+	"strings"
+	"testing"
+)
+
+func TestGetTargetTriple(t *testing.T) {
+	// Get the list of supported architectures from clang
+	cmd := exec.Command("clang", "--print-targets")
+	output, err := cmd.Output()
+	if err != nil {
+		t.Fatalf("Failed to run clang --print-targets: %v", err)
+	}
+
+	// Parse the output to get the list of supported architectures
+	supportedArchs := make(map[string]bool)
+	lines := strings.Split(string(output), "\n")
+	for _, line := range lines {
+		line = strings.TrimSpace(line)
+		if line != "" && !strings.HasPrefix(line, "Registered Targets:") {
+			// Extract the architecture from the line
+			parts := strings.SplitN(line, " - ", 2)
+			if len(parts) > 0 {
+				arch := strings.TrimSpace(parts[0])
+				supportedArchs[arch] = true
+			}
+		}
+	}
+
+	if len(supportedArchs) == 0 {
+		t.Fatal("No supported architectures found from clang --print-targets")
+	}
+
+	t.Logf("Found %d supported architectures from clang", len(supportedArchs))
+
+	// Map our architecture names to clang's architecture names
+	clangArchMap := map[string][]string{
+		"x86_64":  {"x86-64", "x86_64"},
+		"i386":    {"x86", "i386"},
+		"aarch64": {"aarch64", "arm64"},
+		"arm64":   {"arm64", "aarch64"},
+		"armv7":   {"arm", "thumb"},
+		"wasm32":  {"wasm32"},
+	}
+
+	// Define a function to check if the architecture is supported by clang
+	isArchSupported := func(archPart string) (bool, string) {
+		if mappedArchs, ok := clangArchMap[archPart]; ok {
+			for _, mappedArch := range mappedArchs {
+				if supportedArchs[mappedArch] {
+					return true, mappedArch
+				}
+			}
+		} else if supportedArchs[archPart] {
+			// Direct match
+			return true, archPart
+		}
+		return false, ""
+	}
+
+	// Define a function to verify OS name
+	isOSValid := func(os, goos string) bool {
+		validOSMap := map[string][]string{
+			"linux":   {"linux", "linux-gnu"},
+			"darwin":  {"macosx", "darwin"},
+			"windows": {"windows", "win32"},
+			"wasip1":  {"wasip1", "wasi"},
+			"js":      {"js", "javascript"},
+		}
+
+		if validVariants, ok := validOSMap[goos]; ok {
+			for _, validVariant := range validVariants {
+				if strings.HasPrefix(os, validVariant) {
+					return true
+				}
+			}
+		}
+		return false
+	}
+
+	// Define a function to check if vendor is valid
+	isVendorValid := func(vendor string) bool {
+		validVendors := map[string]bool{
+			"unknown": true,
+			"apple":   true,
+			"pc":      true,
+			"ibm":     true,
+		}
+		return validVendors[vendor]
+	}
+
+	// Define the test function
+	checkTriple := func(t *testing.T, testName, goos, goarch, expected string) {
+		t.Helper()
+		got := GetTargetTriple(goos, goarch)
+
+		// Check if the generated triple matches the expected value
+		if got != expected {
+			t.Errorf("getTargetTriple(%q, %q) = %q, want %q",
+				goos, goarch, got, expected)
+		}
+
+		// Extract the architecture part from the triple (first component)
+		parts := strings.Split(got, "-")
+		if len(parts) < 3 {
+			t.Errorf("Invalid target triple format: %s, should have at least 3 components", got)
+			return
+		}
+
+		archPart := parts[0]
+		vendor := parts[1]
+		os := parts[2]
+
+		// Check if the architecture is supported by clang
+		supported, mappedArch := isArchSupported(archPart)
+		if supported {
+			t.Logf("Architecture %s (mapped to %s) is supported by clang", archPart, mappedArch)
+		} else {
+			t.Logf("WARNING: Architecture %s from triple %q for %s/%s not found in clang's supported architectures",
+				archPart, got, goos, goarch)
+		}
+
+		// Verify vendor
+		if !isVendorValid(vendor) {
+			t.Errorf("Invalid vendor in triple: %s", vendor)
+		}
+
+		// Verify OS
+		if !isOSValid(os, goos) {
+			t.Errorf("OS in triple %q doesn't match expected OS %q", os, goos)
+		}
+	}
+
+	// Run tests for different OS/arch combinations
+	checkTriple(t, "wasip1/wasm", "wasip1", "wasm", "wasm32-unknown-wasip1")
+	checkTriple(t, "linux/amd64", "linux", "amd64", "x86_64-unknown-linux")
+	checkTriple(t, "linux/386", "linux", "386", "i386-unknown-linux")
+	checkTriple(t, "linux/arm64", "linux", "arm64", "aarch64-unknown-linux")
+	checkTriple(t, "linux/arm", "linux", "arm", "armv7-unknown-linux")
+	checkTriple(t, "darwin/amd64", "darwin", "amd64", "x86_64-apple-macosx")
+	checkTriple(t, "darwin/arm64", "darwin", "arm64", "arm64-apple-macosx")
+	checkTriple(t, "windows/amd64", "windows", "amd64", "x86_64-unknown-windows")
+	checkTriple(t, "windows/386", "windows", "386", "i386-unknown-windows")
+	checkTriple(t, "js/wasm", "js", "wasm", "wasm32-unknown-js")
+}