Ports/zig: Copy LLVM patches instead of symlinking them

LLVM toolchain is about to get updated to 18.1.3, which would desync
these patches.

Ports/zig/patches/0001-Support-Add-support-for-building-LLVM-on-SerenityOS.patch

@@ -0,0 +1,78 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Daniel Bertalan <[email protected]>
+Date: Thu, 14 Apr 2022 09:54:22 +0200
+Subject: [PATCH] [Support] Add support for building LLVM on SerenityOS
+
+Adds SerenityOS `#ifdef`s for platform-specific code.
+
+We stub out wait4, as SerenityOS doesn't support querying a child
+process's resource usage information.
+---
+ llvm/include/llvm/Support/SwapByteOrder.h | 2 +-
+ llvm/lib/Support/Unix/Path.inc            | 5 ++++-
+ llvm/lib/Support/Unix/Program.inc         | 9 ++++++++-
+ 3 files changed, 13 insertions(+), 3 deletions(-)
+
+diff --git a/llvm/include/llvm/Support/SwapByteOrder.h b/llvm/include/llvm/Support/SwapByteOrder.h
+index 9dd08665b..8915f92e8 100644
+--- a/llvm/include/llvm/Support/SwapByteOrder.h
++++ b/llvm/include/llvm/Support/SwapByteOrder.h
+@@ -20,7 +20,7 @@
+ #include <type_traits>
+
+ #if defined(__linux__) || defined(__GNU__) || defined(__HAIKU__) ||            \
+-    defined(__Fuchsia__) || defined(__EMSCRIPTEN__)
++    defined(__Fuchsia__) || defined(__EMSCRIPTEN__) || defined(__serenity__)
+ #include <endian.h>
+ #elif defined(_AIX)
+ #include <sys/machine.h>
+diff --git a/llvm/lib/Support/Unix/Path.inc b/llvm/lib/Support/Unix/Path.inc
+index 3efcad4f2..4f83d0e76 100644
+--- a/llvm/lib/Support/Unix/Path.inc
++++ b/llvm/lib/Support/Unix/Path.inc
+@@ -112,7 +112,7 @@ typedef uint_t uint;
+ #endif
+
+ #if defined(__NetBSD__) || defined(__DragonFly__) || defined(__GNU__) ||       \
+-    defined(__MVS__)
++    defined(__MVS__) || defined(__serenity__)
+ #define STATVFS_F_FLAG(vfs) (vfs).f_flag
+ #else
+ #define STATVFS_F_FLAG(vfs) (vfs).f_flags
+@@ -506,6 +506,9 @@ static bool is_local_impl(struct STATVFS &Vfs) {
+ #elif defined(__HAIKU__)
+   // Haiku doesn't expose this information.
+   return false;
++#elif defined(__serenity__)
++  // Serenity doesn't yet support remote filesystem mounts.
++  return false;
+ #elif defined(__sun)
+   // statvfs::f_basetype contains a null-terminated FSType name of the mounted
+   // target
+diff --git a/llvm/lib/Support/Unix/Program.inc b/llvm/lib/Support/Unix/Program.inc
+index 897e22711..23965a1a1 100644
+--- a/llvm/lib/Support/Unix/Program.inc
++++ b/llvm/lib/Support/Unix/Program.inc
+@@ -340,7 +340,7 @@ static bool Execute(ProcessInfo &PI, StringRef Program,
+ namespace llvm {
+ namespace sys {
+
+-#ifndef _AIX
++#if !defined(_AIX) && !defined(__serenity__)
+ using ::wait4;
+ #else
+ static pid_t(wait4)(pid_t pid, int *status, int options, struct rusage *usage);
+@@ -383,6 +383,13 @@ pid_t(llvm::sys::wait4)(pid_t pid, int *status, int options,
+ }
+ #endif
+
++#ifdef __serenity__
++pid_t (llvm::sys::wait4)(pid_t pid, int *status, int options,
++                         struct rusage*) {
++  return ::waitpid(pid, status, options);
++}
++#endif
++
+ ProcessInfo llvm::sys::Wait(const ProcessInfo &PI,
+                             std::optional<unsigned> SecondsToWait,
+                             std::string *ErrMsg,

Ports/zig/patches/0002-Triple-Add-triple-for-SerenityOS.patch

@@ -0,0 +1,56 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Daniel Bertalan <[email protected]>
+Date: Thu, 14 Apr 2022 09:51:24 +0200
+Subject: [PATCH] [Triple] Add triple for SerenityOS
+
+---
+ llvm/include/llvm/TargetParser/Triple.h | 8 +++++++-
+ llvm/lib/TargetParser/Triple.cpp        | 2 ++
+ 2 files changed, 9 insertions(+), 1 deletion(-)
+
+diff --git a/llvm/include/llvm/TargetParser/Triple.h b/llvm/include/llvm/TargetParser/Triple.h
+index 59513fa2f..951d69010 100644
+--- a/llvm/include/llvm/TargetParser/Triple.h
++++ b/llvm/include/llvm/TargetParser/Triple.h
+@@ -223,7 +223,8 @@ public:
+     WASI,       // Experimental WebAssembly OS
+     Emscripten,
+     ShaderModel, // DirectX ShaderModel
+-    LastOSType = ShaderModel
++    Serenity,
++    LastOSType = Serenity
+   };
+   enum EnvironmentType {
+     UnknownEnvironment,
+@@ -670,6 +671,11 @@ public:
+     return getOS() == Triple::AIX;
+   }
+
++  /// Tests whether the OS is SerenityOS
++  bool isOSSerenity() const {
++    return getOS() == Triple::Serenity;
++  }
++
+   /// Tests whether the OS uses the ELF binary format.
+   bool isOSBinFormatELF() const {
+     return getObjectFormat() == Triple::ELF;
+diff --git a/llvm/lib/TargetParser/Triple.cpp b/llvm/lib/TargetParser/Triple.cpp
+index a68035989..1ee9ea3b1 100644
+--- a/llvm/lib/TargetParser/Triple.cpp
++++ b/llvm/lib/TargetParser/Triple.cpp
+@@ -237,6 +237,7 @@ StringRef Triple::getOSTypeName(OSType Kind) {
+   case PS5: return "ps5";
+   case RTEMS: return "rtems";
+   case Solaris: return "solaris";
++  case Serenity: return "serenity";
+   case TvOS: return "tvos";
+   case WASI: return "wasi";
+   case WatchOS: return "watchos";
+@@ -596,6 +597,7 @@ static Triple::OSType parseOS(StringRef OSName) {
+     .StartsWith("wasi", Triple::WASI)
+     .StartsWith("emscripten", Triple::Emscripten)
+     .StartsWith("shadermodel", Triple::ShaderModel)
++    .StartsWith("serenity", Triple::Serenity)
+     .Default(Triple::UnknownOS);
+ }
+