// The input file is either a .s or a .bc file
BuildTask CreateCompileTask(string assembly_name, string infile_path, Abi abi)
{
var ext = App.FastDev ? "dylib" : "o";
var ofile = Path.ChangeExtension (infile_path, ext);
var install_name = string.Empty;
if (App.FastDev) {
if (dylibs == null)
dylibs = new List<string> ();
dylibs.Add (ofile);
install_name = "lib" + Path.GetFileName (assembly_name) + ".dylib";
} else {
Target.LinkWith (ofile);
}
if (Application.IsUptodate (new string [] { infile_path, Driver.CompilerPath }, new string [] { ofile })) {
Driver.Log (3, "Target {0} is up-to-date.", ofile);
return null;
} else {
Application.TryDelete (ofile); // otherwise the next task might not detect that it will have to rebuild.
Driver.Log (3, "Target {0} needs to be rebuilt.", ofile);
}
var compiler_flags = new CompilerFlags () { Target = Target };
BuildTask bitcode_task = null;
BuildTask link_task = null;
string link_task_input, link_language = "";
if (App.EnableAsmOnlyBitCode) {
link_task_input = infile_path + ".ll";
link_language = "";
// linker_flags.Add (" -fembed-bitcode");
bitcode_task = new BitCodeify () {
Input = infile_path,
OutputFile = link_task_input,
Platform = App.Platform,
Abi = abi,
DeploymentTarget = App.DeploymentTarget,
};
} else {
link_task_input = infile_path;
if (infile_path.EndsWith (".s"))
link_language = "assembler";
}
if (App.FastDev) {
compiler_flags.AddFrameworks (Frameworks, WeakFrameworks);
compiler_flags.AddLinkWith (LinkWith, ForceLoad);
compiler_flags.LinkWithMono ();
compiler_flags.LinkWithXamarin ();
compiler_flags.AddOtherFlags (LinkerFlags);
if (Target.GetEntryPoints ().ContainsKey ("UIApplicationMain"))
compiler_flags.AddFramework ("UIKit");
}
link_task = new LinkTask ()
{
Target = Target,
AssemblyName = assembly_name,
Abi = abi,
InputFile = link_task_input,
OutputFile = ofile,
InstallName = install_name,
CompilerFlags = compiler_flags,
SharedLibrary = App.FastDev,
Language = link_language,
};
if (bitcode_task != null) {
bitcode_task.NextTasks = new BuildTask[] { link_task };
return bitcode_task;
}
return link_task;
}
public void NativeLink()
{
if (!string.IsNullOrEmpty (App.UserGccFlags))
App.DeadStrip = false;
if (App.EnableLLVMOnlyBitCode)
App.DeadStrip = false;
var compiler_flags = new CompilerFlags () { Target = this };
// Get global frameworks
compiler_flags.AddFrameworks (App.Frameworks, App.WeakFrameworks);
compiler_flags.AddFrameworks (Frameworks, WeakFrameworks);
// Collect all LinkWith flags and frameworks from all assemblies.
foreach (var a in Assemblies) {
compiler_flags.AddFrameworks (a.Frameworks, a.WeakFrameworks);
compiler_flags.AddLinkWith (a.LinkWith, a.ForceLoad);
compiler_flags.AddOtherFlags (a.LinkerFlags);
}
var bitcode = App.EnableBitCode;
if (bitcode)
compiler_flags.AddOtherFlag (App.EnableMarkerOnlyBitCode ? "-fembed-bitcode-marker" : "-fembed-bitcode");
if (App.EnablePie.HasValue && App.EnablePie.Value && (App.DeploymentTarget < new Version (4, 2)))
ErrorHelper.Error (28, "Cannot enable PIE (-pie) when targeting iOS 4.1 or earlier. Please disable PIE (-pie:false) or set the deployment target to at least iOS 4.2");
if (!App.EnablePie.HasValue)
App.EnablePie = true;
if (App.Platform == ApplePlatform.iOS) {
if (App.EnablePie.Value && (App.DeploymentTarget >= new Version (4, 2))) {
compiler_flags.AddOtherFlag ("-Wl,-pie");
} else {
compiler_flags.AddOtherFlag ("-Wl,-no_pie");
}
}
CompileTask.GetArchFlags (compiler_flags, Abis);
if (App.IsDeviceBuild) {
compiler_flags.AddOtherFlag ($"-m{Driver.TargetMinSdkName}-version-min={App.DeploymentTarget}");
compiler_flags.AddOtherFlag ($"-isysroot {Driver.Quote (Driver.FrameworkDirectory)}");
} else {
CompileTask.GetSimulatorCompilerFlags (compiler_flags, null, App);
}
compiler_flags.LinkWithMono ();
compiler_flags.LinkWithXamarin ();
compiler_flags.AddLinkWith (link_with);
compiler_flags.AddOtherFlag ($"-o {Driver.Quote (Executable)}");
compiler_flags.AddOtherFlag ("-lz");
compiler_flags.AddOtherFlag ("-liconv");
if (App.EnableBitCode)
compiler_flags.AddOtherFlag ("-lc++");
// allow the native linker to remove unused symbols (if the caller was removed by the managed linker)
if (!bitcode) {
foreach (var entry in GetRequiredSymbols ()) {
// Note that we include *all* (__Internal) p/invoked symbols here
// We also include any fields from [Field] attributes.
compiler_flags.ReferenceSymbol (entry);
}
}
string mainlib;
if (App.IsWatchExtension) {
mainlib = "libwatchextension.a";
compiler_flags.AddOtherFlag (" -e _xamarin_watchextension_main");
} else if (App.IsTVExtension) {
mainlib = "libtvextension.a";
} else if (App.IsExtension) {
mainlib = "libextension.a";
} else {
mainlib = "libapp.a";
}
var libdir = Path.Combine (Driver.ProductSdkDirectory, "usr", "lib");
var libmain = Path.Combine (libdir, mainlib);
compiler_flags.AddLinkWith (libmain, true);
if (App.EnableProfiling) {
string libprofiler;
if (App.FastDev) {
libprofiler = Path.Combine (libdir, "libmono-profiler-log.dylib");
compiler_flags.AddLinkWith (libprofiler);
} else {
libprofiler = Path.Combine (libdir, "libmono-profiler-log.a");
compiler_flags.AddLinkWith (libprofiler);
if (!App.EnableBitCode)
compiler_flags.ReferenceSymbol ("mono_profiler_startup_log");
}
}
if (!string.IsNullOrEmpty (App.UserGccFlags))
compiler_flags.AddOtherFlag (App.UserGccFlags);
if (App.DeadStrip)
compiler_flags.AddOtherFlag ("-dead_strip");
if (App.IsExtension) {
if (App.Platform == ApplePlatform.iOS && Driver.XcodeVersion.Major < 7) {
compiler_flags.AddOtherFlag ("-lpkstart");
compiler_flags.AddOtherFlag ($"-F {Driver.Quote (Path.Combine (Driver.FrameworkDirectory, "System/Library/PrivateFrameworks"))} -framework PlugInKit");
}
compiler_flags.AddOtherFlag ("-fapplication-extension");
}
compiler_flags.Inputs = new List<string> ();
var flags = compiler_flags.ToString (); // This will populate Inputs.
if (!Application.IsUptodate (compiler_flags.Inputs, new string [] { Executable } )) {
// always show the native linker warnings since many of them turn out to be very important
// and very hard to diagnose otherwise when hidden from the build output. Ref: bug #2430
var linker_errors = new List<Exception> ();
var output = new StringBuilder ();
var code = Driver.RunCommand (Driver.CompilerPath, flags, null, output);
Application.ProcessNativeLinkerOutput (this, output.ToString (), link_with, linker_errors, code != 0);
if (code != 0) {
// if the build failed - it could be because of missing frameworks / libraries we identified earlier
foreach (var assembly in Assemblies) {
if (assembly.UnresolvedModuleReferences == null)
continue;
foreach (var mr in assembly.UnresolvedModuleReferences) {
// TODO: add more diagnose information on the warnings
var name = Path.GetFileNameWithoutExtension (mr.Name);
linker_errors.Add (new MonoTouchException (5215, false, "References to '{0}' might require additional -framework=XXX or -lXXX instructions to the native linker", name));
}
}
// mtouch does not validate extra parameters given to GCC when linking (--gcc_flags)
if (!String.IsNullOrEmpty (App.UserGccFlags))
linker_errors.Add (new MonoTouchException (5201, true, "Native linking failed. Please review the build log and the user flags provided to gcc: {0}", App.UserGccFlags));
linker_errors.Add (new MonoTouchException (5202, true, "Native linking failed. Please review the build log.", App.UserGccFlags));
}
ErrorHelper.Show (linker_errors);
} else {
cached_executable = true;
Driver.Log (3, "Target '{0}' is up-to-date.", Executable);
}
// the native linker can prefer private (and existing) over public (but non-existing) framework when weak_framework are used
// on an iOS target version where the framework does not exists, e.g. targeting iOS6 for JavaScriptCore added in iOS7 results in
// /System/Library/PrivateFrameworks/JavaScriptCore.framework/JavaScriptCore instead of
// /System/Library/Frameworks/JavaScriptCore.framework/JavaScriptCore
// more details in https://bugzilla.xamarin.com/show_bug.cgi?id=31036
if (WeakFrameworks.Count > 0)
AdjustDylibs ();
Driver.Watch ("Native Link", 1);
}