Build for Linux ARM32 (armhf) and ARM64 (aarch64)

build.cake

@@ -75,6 +75,11 @@ var TRACKED_NUGETS = new Dictionary<string, Version> {
     { "SkiaSharp.Vulkan.SharpVk",                      new Version (1, 57, 0) },
 };
 
+Information("Arguments:");
+foreach (var arg in CAKE_ARGUMENTS) {
+    Information($"    {arg.Key.PadRight(30)} {{0}}", arg.Value);
+}
+
 #load "cake/msbuild.cake"
 #load "cake/UtilsManaged.cake"
 #load "cake/externals.cake"

cake/native-shared.cake

@@ -1,11 +1,5 @@
 #load "shared.cake"
 
-var BUILD_ARCH = Argument("arch", Argument("buildarch", EnvironmentVariable("BUILD_ARCH") ?? ""))
-    .ToLower().Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
-
-var BUILD_VARIANT = Argument("variant", EnvironmentVariable("BUILD_VARIANT"));
-var ADDITIONAL_GN_ARGS = Argument("gnArgs", EnvironmentVariable("ADDITIONAL_GN_ARGS"));
-
 var PYTHON_EXE = Argument("python", EnvironmentVariable("PYTHON_EXE") ?? "python");
 
 if (!string.IsNullOrEmpty(PYTHON_EXE) && FileExists(PYTHON_EXE)) {
@@ -85,7 +79,7 @@ void GnNinja(DirectoryPath outDir, string target, string skiaArgs)
 void StripSign(FilePath target)
 {
     if (!IsRunningOnMac())
-        throw new InvalidOperationException("lipo is only available on Unix.");
+        throw new InvalidOperationException("lipo is only available on macOS.");
 
     target = MakeAbsolute(target);
     var archive = target;
@@ -107,7 +101,7 @@ void StripSign(FilePath target)
 void RunLipo(DirectoryPath directory, FilePath output, FilePath[] inputs)
 {
     if (!IsRunningOnMac())
-        throw new InvalidOperationException("lipo is only available on Unix.");
+        throw new InvalidOperationException("lipo is only available on macOS.");
 
     EnsureDirectoryExists(directory.CombineWithFilePath(output).GetDirectory());
 

cake/shared.cake

@@ -13,6 +13,12 @@ var CAKE_ARGUMENTS = (IReadOnlyDictionary<string, string>)Context.Arguments
     .GetProperty("Arguments")
     .GetValue(Context.Arguments);
 
+var BUILD_ARCH = Argument("arch", Argument("buildarch", EnvironmentVariable("BUILD_ARCH") ?? ""))
+    .ToLower().Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
+
+var BUILD_VARIANT = Argument("variant", EnvironmentVariable("BUILD_VARIANT"));
+var ADDITIONAL_GN_ARGS = Argument("gnArgs", EnvironmentVariable("ADDITIONAL_GN_ARGS"));
+
 DirectoryPath PROFILE_PATH = EnvironmentVariable("USERPROFILE") ?? EnvironmentVariable("HOME");
 
 void RunCake(FilePath cake, string target = null, Dictionary<string, string> arguments = null)

native/linux-clang-cross/build.cake

@@ -0,0 +1,61 @@
+DirectoryPath ROOT_PATH = MakeAbsolute(Directory("../.."));
+
+#load "../../cake/shared.cake"
+
+if (BUILD_ARCH.Length == 0)
+    BUILD_ARCH = new [] { "arm" };
+
+string GetGnArgs(string arch)
+{
+    var toolchainArch = arch == "arm"
+        ? "arm-linux-gnueabihf"
+        : "aarch64-linux-gnu";
+    var targetArch = arch == "arm"
+        ? "armv7a-linux-gnueabihf"
+        : "aarch64-linux-gnu";
+
+    var sysroot = $"/usr/{toolchainArch}";
+    var init = $"'--sysroot={sysroot}', '--target={targetArch}'";
+    var bin = $"'-B{sysroot}/bin/' ";
+    var libs = $"'-L{sysroot}/lib/' ";
+    var includes = 
+        $"'-I{sysroot}/include', " +
+        $"'-I{sysroot}/include/c++/current', " +
+        $"'-I{sysroot}/include/c++/current/{toolchainArch}' ";
+
+    return
+        $"extra_asmflags+=[ {init}, '-no-integrated-as', {bin}, {includes} ] " +
+        $"extra_cflags+=[ {init}, {bin}, {includes} ] " +
+        $"extra_ldflags+=[ {init}, {bin}, {libs} ] " +
+        ADDITIONAL_GN_ARGS;
+}
+
+Task("libSkiaSharp")
+    .WithCriteria(IsRunningOnLinux())
+    .Does(() =>
+{
+    foreach (var arch in BUILD_ARCH) {
+        RunCake("../linux/build.cake", "libSkiaSharp", new Dictionary<string, string> {
+            { "arch", arch },
+            { "gnArgs", GetGnArgs(arch) },
+        });
+    }
+});
+
+Task("libHarfBuzzSharp")
+    .WithCriteria(IsRunningOnLinux())
+    .Does(() =>
+{
+    foreach (var arch in BUILD_ARCH) {
+        RunCake("../linux/build.cake", "libHarfBuzzSharp", new Dictionary<string, string> {
+            { "arch", arch },
+            { "gnArgs", GetGnArgs(arch) },
+        });
+    }
+});
+
+Task("Default")
+    .IsDependentOn("libSkiaSharp")
+    .IsDependentOn("libHarfBuzzSharp");
+
+RunTarget(TARGET);

native/linux/build.cake

@@ -6,32 +6,35 @@ DirectoryPath OUTPUT_PATH = MakeAbsolute(ROOT_PATH.Combine("output/native"));
 string SUPPORT_GPU_VAR = Argument("supportGpu", EnvironmentVariable("SUPPORT_GPU") ?? "true").ToLower();
 bool SUPPORT_GPU = SUPPORT_GPU_VAR == "1" || SUPPORT_GPU_VAR == "true";
 
-string SUPPORT_VULKAN_VAR = Argument ("supportVulkan", EnvironmentVariable ("SUPPORT_VULKAN") ?? "true");
-bool SUPPORT_VULKAN = SUPPORT_VULKAN_VAR == "1" || SUPPORT_VULKAN_VAR.ToLower () == "true";
+string SUPPORT_VULKAN_VAR = Argument("supportVulkan", EnvironmentVariable("SUPPORT_VULKAN") ?? "true");
+bool SUPPORT_VULKAN = SUPPORT_VULKAN_VAR == "1" || SUPPORT_VULKAN_VAR.ToLower() == "true";
+
+var VERIFY_EXCLUDED = Argument("verifyExcluded", "")
+    .ToLower().Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
 
 string CC = Argument("cc", EnvironmentVariable("CC"));
 string CXX = Argument("cxx", EnvironmentVariable("CXX"));
 string AR = Argument("ar", EnvironmentVariable("AR"));
 
-string VARIANT = BUILD_VARIANT ?? "linux";
+string VARIANT = string.IsNullOrEmpty(BUILD_VARIANT) ? "linux" : BUILD_VARIANT?.Trim();
+
+if (BUILD_ARCH.Length == 0)
+    BUILD_ARCH = new [] { "x64" };
+
+var COMPILERS = "";
+if (!string.IsNullOrEmpty(CC))
+    COMPILERS += $"cc='{CC}' ";
+if (!string.IsNullOrEmpty(CXX))
+    COMPILERS += $"cxx='{CXX}' ";
+if (!string.IsNullOrEmpty(AR))
+    COMPILERS += $"ar='{AR}' ";
 
 Task("libSkiaSharp")
     .IsDependentOn("git-sync-deps")
     .WithCriteria(IsRunningOnLinux())
     .Does(() =>
 {
-    var COMPILERS = "";
-    if (!string.IsNullOrEmpty(CC))
-        COMPILERS += $"cc='{CC}' ";
-    if (!string.IsNullOrEmpty(CXX))
-        COMPILERS += $"cxx='{CXX}' ";
-    if (!string.IsNullOrEmpty(AR))
-        COMPILERS += $"ar='{AR}' ";
-
-    Build("x64", "x64", "x64");
-
-    void Build(string arch, string skiaArch, string dir)
-    {
+    foreach (var arch in BUILD_ARCH) {
         if (Skip(arch)) return;
 
         var soname = GetVersion("libSkiaSharp", "soname");
@@ -52,49 +55,64 @@ Task("libSkiaSharp")
             $"skia_use_system_libpng=false " +
             $"skia_use_system_libwebp=false " +
             $"skia_use_system_zlib=false " +
-            $"skia_use_vulkan={SUPPORT_VULKAN} ".ToLower () +
+            $"skia_use_vulkan={SUPPORT_VULKAN} ".ToLower() +
+            $"extra_asmflags=[] " +
             $"extra_cflags=[ '-DSKIA_C_DLL', '-DHAVE_SYSCALL_GETRANDOM', '-DXML_DEV_URANDOM' ] " +
             $"extra_ldflags=[ '-static-libstdc++', '-static-libgcc', '-Wl,--version-script={map}' ] " +
             COMPILERS +
             $"linux_soname_version='{soname}' " +
             ADDITIONAL_GN_ARGS);
 
-        var outDir = OUTPUT_PATH.Combine($"{VARIANT}/{dir}");
+        var outDir = OUTPUT_PATH.Combine($"{VARIANT}/{arch}");
         EnsureDirectoryExists(outDir);
         var so = SKIA_PATH.CombineWithFilePath($"out/{VARIANT}/{arch}/libSkiaSharp.so.{soname}");
         CopyFileToDirectory(so, outDir);
         CopyFile(so, outDir.CombineWithFilePath("libSkiaSharp.so"));
+
+        foreach (var exclude in VERIFY_EXCLUDED) {
+            RunProcess("readelf", $"-d {so}", out var stdout);
+
+            if (stdout.Any(o => o.Contains($"[{exclude}.")))
+                throw new Exception($"libSkiaSharp.so contained a dependency on {exclude}.");
+        }
     }
 });
 
 Task("libHarfBuzzSharp")
+    .IsDependentOn("git-sync-deps")
     .WithCriteria(IsRunningOnLinux())
     .Does(() =>
 {
-    var COMPILERS = "";
-    if (!string.IsNullOrEmpty(CC))
-        COMPILERS += $"CC='{CC}' ";
-    if (!string.IsNullOrEmpty(CXX))
-        COMPILERS += $"CXX='{CXX}' ";
-
-    Build("x64", "x64");
-
-    void Build(string arch, string dir)
-    {
+    foreach (var arch in BUILD_ARCH) {
         if (Skip(arch)) return;
 
         var soname = GetVersion("HarfBuzz", "soname");
+        var map = MakeAbsolute((FilePath)"libHarfBuzzSharp/libHarfBuzzSharp.map");
 
-        RunProcess("make", new ProcessSettings {
-            Arguments = $"{COMPILERS} ARCH={arch} SONAME_VERSION={soname} VARIANT={VARIANT} LDFLAGS=-static-libstdc++",
-            WorkingDirectory = "libHarfBuzzSharp",
-        });
+        GnNinja($"{VARIANT}/{arch}", "HarfBuzzSharp",
+            $"target_os='linux' " +
+            $"target_cpu='{arch}' " +
+            $"is_official_build=true " +
+            $"visibility_hidden=false " +
+            $"extra_asmflags=[] " +
+            $"extra_cflags=[] " +
+            $"extra_ldflags=[ '-static-libstdc++', '-static-libgcc', '-Wl,--version-script={map}' ] " +
+            COMPILERS +
+            $"linux_soname_version='{soname}' " +
+            ADDITIONAL_GN_ARGS);
 
-        var outDir = OUTPUT_PATH.Combine($"{VARIANT}/{dir}");
+        var outDir = OUTPUT_PATH.Combine($"{VARIANT}/{arch}");
         EnsureDirectoryExists(outDir);
-        var so = $"libHarfBuzzSharp/bin/{VARIANT}/{arch}/libHarfBuzzSharp.so.{soname}";
+        var so = SKIA_PATH.CombineWithFilePath($"out/{VARIANT}/{arch}/libHarfBuzzSharp.so.{soname}");
         CopyFileToDirectory(so, outDir);
         CopyFile(so, outDir.CombineWithFilePath("libHarfBuzzSharp.so"));
+
+        foreach (var exclude in VERIFY_EXCLUDED) {
+            RunProcess("readelf", $"-d {so}", out var stdout);
+
+            if (stdout.Any(o => o.Contains($"[{exclude}.")))
+                throw new Exception($"libHarfBuzzSharp.so contained a dependency on {exclude}.");
+        }
     }
 });