internal/rosa/package: migrate llvm patches

LLVM itself is unlikely to ever be migrated due to complexity of the bootstrap, so migrate patches instead.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/llvm.go

@@ -1,9 +1,11 @@
 package rosa
 
 import (
+	"io/fs"
 	"regexp"
 	"slices"
 	"strings"
+	"unsafe"
 
 	"hakurei.app/internal/pkg"
 )
@@ -48,6 +50,24 @@ func litArgs(verbose bool, skipChecks ...string) string {
 }
 
 func init() {
+	var llvmPatches []KV
+	for _, name := range [...]string{
+		"increase-stack-size-unconditional",
+		"add-rosa-vendor",
+		"xfail-broken-tests",
+		"path-system-include",
+		"path-system-libraries",
+	} {
+		p, err := fs.ReadFile(nativeB, "package/llvm/"+name+".patch")
+		if err != nil {
+			panic(err)
+		}
+		llvmPatches = append(llvmPatches, KV{
+			name,
+			unsafe.String(unsafe.SliceData(p), len(p)),
+		})
+	}
+
 	native.MustRegister("early-compiler-rt", func(t Toolchain) (*Metadata, pkg.Artifact) {
 		meta := Metadata{
 			Name:        "early-compiler-rt",

internal/rosa/package/llvm/add-rosa-vendor.patch

@@ -0,0 +1,32 @@
+diff --git a/llvm/include/llvm/TargetParser/Triple.h b/llvm/include/llvm/TargetParser/Triple.h
+index 9c83abeeb3b1..5acfe5836a23 100644
+--- a/llvm/include/llvm/TargetParser/Triple.h
++++ b/llvm/include/llvm/TargetParser/Triple.h
+@@ -190,6 +190,7 @@ public:
+ 
+     Apple,
+     PC,
++    Rosa,
+     SCEI,
+     Freescale,
+     IBM,
+diff --git a/llvm/lib/TargetParser/Triple.cpp b/llvm/lib/TargetParser/Triple.cpp
+index a4f9dd42c0fe..cb5a12387034 100644
+--- a/llvm/lib/TargetParser/Triple.cpp
++++ b/llvm/lib/TargetParser/Triple.cpp
+@@ -279,6 +279,7 @@ StringRef Triple::getVendorTypeName(VendorType Kind) {
+   case NVIDIA: return "nvidia";
+   case OpenEmbedded: return "oe";
+   case PC: return "pc";
++  case Rosa: return "rosa";
+   case SCEI: return "scei";
+   case SUSE: return "suse";
+   case Meta:
+@@ -689,6 +690,7 @@ static Triple::VendorType parseVendor(StringRef VendorName) {
+   return StringSwitch<Triple::VendorType>(VendorName)
+       .Case("apple", Triple::Apple)
+       .Case("pc", Triple::PC)
++      .Case("rosa", Triple::Rosa)
+       .Case("scei", Triple::SCEI)
+       .Case("sie", Triple::SCEI)
+       .Case("fsl", Triple::Freescale)

internal/rosa/package/llvm/increase-stack-size-unconditional.patch

@@ -0,0 +1,13 @@
+diff --git a/llvm/lib/Support/Threading.cpp b/llvm/lib/Support/Threading.cpp
+index 9da357a7ebb9..b2931510c1ae 100644
+--- a/llvm/lib/Support/Threading.cpp
++++ b/llvm/lib/Support/Threading.cpp
+@@ -80,7 +80,7 @@ unsigned llvm::ThreadPoolStrategy::compute_thread_count() const {
+ // keyword.
+ #include "llvm/Support/thread.h"
+ 
+-#if defined(__APPLE__)
++#if defined(__APPLE__) || 1
+   // Darwin's default stack size for threads except the main one is only 512KB,
+   // which is not enough for some/many normal LLVM compilations. This implements
+   // the same interface as std::thread but requests the same stack size as the

internal/rosa/package/llvm/path-system-include.patch

@@ -0,0 +1,25 @@
+diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
+index 8ac8d4eb9181..e46b04a898ca 100644
+--- a/clang/lib/Driver/ToolChains/Linux.cpp
++++ b/clang/lib/Driver/ToolChains/Linux.cpp
+@@ -671,6 +671,12 @@ void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
+     addExternCSystemInclude(
+         DriverArgs, CC1Args,
+         concat(SysRoot, "/usr/include", MultiarchIncludeDir));
++  if (!MultiarchIncludeDir.empty() &&
++      D.getVFS().exists(concat(SysRoot, "/system/include", MultiarchIncludeDir)))
++    addExternCSystemInclude(
++        DriverArgs, CC1Args,
++        concat(SysRoot, "/system/include", MultiarchIncludeDir));
++
+ 
+   if (getTriple().getOS() == llvm::Triple::RTEMS)
+     return;
+@@ -681,6 +687,7 @@ void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
+   addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/include"));
+ 
+   addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/usr/include"));
++  addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/system/include"));
+ 
+   if (!DriverArgs.hasArg(options::OPT_nobuiltininc) && getTriple().isMusl())
+     addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude);

internal/rosa/package/llvm/path-system-libraries.patch

@@ -1,96 +1,4 @@
-package rosa
+diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
-
-// llvmPatches are centralised patches against latest LLVM monorepo.
-var llvmPatches = []KV{
-	{"increase-stack-size-unconditional", `diff --git a/llvm/lib/Support/Threading.cpp b/llvm/lib/Support/Threading.cpp
-index 9da357a7ebb9..b2931510c1ae 100644
---- a/llvm/lib/Support/Threading.cpp
-+++ b/llvm/lib/Support/Threading.cpp
-@@ -80,7 +80,7 @@ unsigned llvm::ThreadPoolStrategy::compute_thread_count() const {
- // keyword.
- #include "llvm/Support/thread.h"
- 
--#if defined(__APPLE__)
-+#if defined(__APPLE__) || 1
-   // Darwin's default stack size for threads except the main one is only 512KB,
-   // which is not enough for some/many normal LLVM compilations. This implements
-   // the same interface as std::thread but requests the same stack size as the
-`},
-
-	{"add-rosa-vendor", `diff --git a/llvm/include/llvm/TargetParser/Triple.h b/llvm/include/llvm/TargetParser/Triple.h
-index 9c83abeeb3b1..5acfe5836a23 100644
---- a/llvm/include/llvm/TargetParser/Triple.h
-+++ b/llvm/include/llvm/TargetParser/Triple.h
-@@ -190,6 +190,7 @@ public:
- 
-     Apple,
-     PC,
-+    Rosa,
-     SCEI,
-     Freescale,
-     IBM,
-diff --git a/llvm/lib/TargetParser/Triple.cpp b/llvm/lib/TargetParser/Triple.cpp
-index a4f9dd42c0fe..cb5a12387034 100644
---- a/llvm/lib/TargetParser/Triple.cpp
-+++ b/llvm/lib/TargetParser/Triple.cpp
-@@ -279,6 +279,7 @@ StringRef Triple::getVendorTypeName(VendorType Kind) {
-   case NVIDIA: return "nvidia";
-   case OpenEmbedded: return "oe";
-   case PC: return "pc";
-+  case Rosa: return "rosa";
-   case SCEI: return "scei";
-   case SUSE: return "suse";
-   case Meta:
-@@ -689,6 +690,7 @@ static Triple::VendorType parseVendor(StringRef VendorName) {
-   return StringSwitch<Triple::VendorType>(VendorName)
-       .Case("apple", Triple::Apple)
-       .Case("pc", Triple::PC)
-+      .Case("rosa", Triple::Rosa)
-       .Case("scei", Triple::SCEI)
-       .Case("sie", Triple::SCEI)
-       .Case("fsl", Triple::Freescale)
-`},
-
-	{"xfail-broken-tests", `diff --git a/clang/test/Modules/timestamps.c b/clang/test/Modules/timestamps.c
-index 50fdce630255..4b4465a75617 100644
---- a/clang/test/Modules/timestamps.c
-+++ b/clang/test/Modules/timestamps.c
-@@ -1,3 +1,5 @@
-+// XFAIL: target={{.*-rosa-linux-musl}}
-+
- /// Verify timestamps that gets embedded in the module
- #include <c-header.h>
- 
-`},
-
-	{"path-system-include", `diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
-index 8ac8d4eb9181..e46b04a898ca 100644
---- a/clang/lib/Driver/ToolChains/Linux.cpp
-+++ b/clang/lib/Driver/ToolChains/Linux.cpp
-@@ -671,6 +671,12 @@ void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
-     addExternCSystemInclude(
-         DriverArgs, CC1Args,
-         concat(SysRoot, "/usr/include", MultiarchIncludeDir));
-+  if (!MultiarchIncludeDir.empty() &&
-+      D.getVFS().exists(concat(SysRoot, "/system/include", MultiarchIncludeDir)))
-+    addExternCSystemInclude(
-+        DriverArgs, CC1Args,
-+        concat(SysRoot, "/system/include", MultiarchIncludeDir));
-+
- 
-   if (getTriple().getOS() == llvm::Triple::RTEMS)
-     return;
-@@ -681,6 +687,7 @@ void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
-   addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/include"));
- 
-   addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/usr/include"));
-+  addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/system/include"));
- 
-   if (!DriverArgs.hasArg(options::OPT_nobuiltininc) && getTriple().isMusl())
-     addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude);
-`},
-
-	{"path-system-libraries", `diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
 index cb6a9b242421..b8d31690d1af 100644
 --- a/clang/lib/Driver/ToolChains/Gnu.cpp
 +++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -178,5 +86,3 @@ index d525b417b4ea..2b93f401733e 100644
      std::string ArchName;
      bool IsArm = false;
  
-`},
-}

internal/rosa/package/llvm/xfail-broken-tests.patch

@@ -0,0 +1,10 @@
+diff --git a/clang/test/Modules/timestamps.c b/clang/test/Modules/timestamps.c
+index 50fdce630255..4b4465a75617 100644
+--- a/clang/test/Modules/timestamps.c
++++ b/clang/test/Modules/timestamps.c
+@@ -1,3 +1,5 @@
++// XFAIL: target={{.*-rosa-linux-musl}}
++
+ /// Verify timestamps that gets embedded in the module
+ #include <c-header.h>
+