llvm_11: patch to recognize Genode platform triples

This patch does not add Genode support to the Clang frontend or
LLVM runtime libraries, only the LLVM code generator and optimizer.

pkgs/development/compilers/llvm/11/llvm-genode.patch

@@ -0,0 +1,157 @@
+diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
+index 5ef22eb493ba..f40625c7eed2 100644
+--- a/cmake/modules/HandleLLVMOptions.cmake
++++ b/cmake/modules/HandleLLVMOptions.cmake
+@@ -132,7 +132,7 @@ if(WIN32)
+     set(LLVM_ON_UNIX 0)
+   endif(CYGWIN)
+ else(WIN32)
+-  if(FUCHSIA OR UNIX)
++  if(FUCHSIA OR GENODE OR UNIX)
+     set(LLVM_ON_WIN32 0)
+     set(LLVM_ON_UNIX 1)
+     if(APPLE OR ${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+@@ -140,9 +140,9 @@ else(WIN32)
+     else()
+       set(LLVM_HAVE_LINK_VERSION_SCRIPT 1)
+     endif()
+-  else(FUCHSIA OR UNIX)
++  else(FUCHSIA OR GENODE OR UNIX)
+     MESSAGE(SEND_ERROR "Unable to determine platform")
+-  endif(FUCHSIA OR UNIX)
++  endif(FUCHSIA OR GENODE OR UNIX)
+ endif(WIN32)
+ 
+ set(EXEEXT ${CMAKE_EXECUTABLE_SUFFIX})
+diff --git a/include/llvm/ADT/Triple.h b/include/llvm/ADT/Triple.h
+index 6bad18f19244..95459ca997c5 100644
+--- a/include/llvm/ADT/Triple.h
++++ b/include/llvm/ADT/Triple.h
+@@ -166,6 +166,7 @@ public:
+     DragonFly,
+     FreeBSD,
+     Fuchsia,
++    Genode,
+     IOS,
+     KFreeBSD,
+     Linux,
+@@ -502,6 +503,8 @@ public:
+ 
+   bool isOSDragonFly() const { return getOS() == Triple::DragonFly; }
+ 
++  bool isOSGenode() const { return getOS() == Triple::Genode; }
++
+   bool isOSSolaris() const {
+     return getOS() == Triple::Solaris;
+   }
+diff --git a/include/llvm/BinaryFormat/ELF.h b/include/llvm/BinaryFormat/ELF.h
+index bdcf10fd1640..46ed8e56cc31 100644
+--- a/include/llvm/BinaryFormat/ELF.h
++++ b/include/llvm/BinaryFormat/ELF.h
+@@ -348,6 +348,7 @@ enum {
+   ELFOSABI_AROS = 15,          // AROS
+   ELFOSABI_FENIXOS = 16,       // FenixOS
+   ELFOSABI_CLOUDABI = 17,      // Nuxi CloudABI
++  ELFOSABI_GENODE = 63,        // Genode (temporary)
+   ELFOSABI_FIRST_ARCH = 64,    // First architecture-specific OS ABI
+   ELFOSABI_AMDGPU_HSA = 64,    // AMD HSA runtime
+   ELFOSABI_AMDGPU_PAL = 65,    // AMD PAL runtime
+diff --git a/include/llvm/MC/MCELFObjectWriter.h b/include/llvm/MC/MCELFObjectWriter.h
+index 8f78b99d3794..7a1d1981f60d 100644
+--- a/include/llvm/MC/MCELFObjectWriter.h
++++ b/include/llvm/MC/MCELFObjectWriter.h
+@@ -74,6 +74,8 @@ public:
+     switch (OSType) {
+       case Triple::CloudABI:
+         return ELF::ELFOSABI_CLOUDABI;
++      case Triple::Genode:
++        return ELF::ELFOSABI_GENODE;
+       case Triple::HermitCore:
+         return ELF::ELFOSABI_STANDALONE;
+       case Triple::PS4:
+diff --git a/lib/ObjectYAML/ELFYAML.cpp b/lib/ObjectYAML/ELFYAML.cpp
+index 2353b34f188b..e93f53c40888 100644
+--- a/lib/ObjectYAML/ELFYAML.cpp
++++ b/lib/ObjectYAML/ELFYAML.cpp
+@@ -268,6 +268,7 @@ void ScalarEnumerationTraits<ELFYAML::ELF_ELFOSABI>::enumeration(
+   ECase(ELFOSABI_AROS);
+   ECase(ELFOSABI_FENIXOS);
+   ECase(ELFOSABI_CLOUDABI);
++  ECase(ELFOSABI_GENODE);
+   ECase(ELFOSABI_AMDGPU_HSA);
+   ECase(ELFOSABI_AMDGPU_PAL);
+   ECase(ELFOSABI_AMDGPU_MESA3D);
+diff --git a/lib/Support/Triple.cpp b/lib/Support/Triple.cpp
+index fec1985ccaca..1f3e4f07fb8e 100644
+--- a/lib/Support/Triple.cpp
++++ b/lib/Support/Triple.cpp
+@@ -197,6 +197,7 @@ StringRef Triple::getOSTypeName(OSType Kind) {
+   case Emscripten: return "emscripten";
+   case FreeBSD: return "freebsd";
+   case Fuchsia: return "fuchsia";
++  case Genode: return "genode";
+   case Haiku: return "haiku";
+   case HermitCore: return "hermit";
+   case Hurd: return "hurd";
+@@ -494,6 +495,7 @@ static Triple::OSType parseOS(StringRef OSName) {
+     .StartsWith("dragonfly", Triple::DragonFly)
+     .StartsWith("freebsd", Triple::FreeBSD)
+     .StartsWith("fuchsia", Triple::Fuchsia)
++    .StartsWith("genode", Triple::Genode)
+     .StartsWith("ios", Triple::IOS)
+     .StartsWith("kfreebsd", Triple::KFreeBSD)
+     .StartsWith("linux", Triple::Linux)
+diff --git a/tools/llvm-readobj/ELFDumper.cpp b/tools/llvm-readobj/ELFDumper.cpp
+index 15076f1f8933..b0636e7eb196 100644
+--- a/tools/llvm-readobj/ELFDumper.cpp
++++ b/tools/llvm-readobj/ELFDumper.cpp
+@@ -1334,6 +1334,7 @@ static const EnumEntry<unsigned> ElfOSABI[] = {
+   {"AROS",         "AROS",                 ELF::ELFOSABI_AROS},
+   {"FenixOS",      "FenixOS",              ELF::ELFOSABI_FENIXOS},
+   {"CloudABI",     "CloudABI",             ELF::ELFOSABI_CLOUDABI},
++  {"Genode",       "Genode",               ELF::ELFOSABI_GENODE},
+   {"Standalone",   "Standalone App",       ELF::ELFOSABI_STANDALONE}
+ };
+ 
+diff --git a/unittests/ADT/TripleTest.cpp b/unittests/ADT/TripleTest.cpp
+index dc7a28c72f20..eb62772c1dda 100644
+--- a/unittests/ADT/TripleTest.cpp
++++ b/unittests/ADT/TripleTest.cpp
+@@ -248,6 +248,12 @@ TEST(TripleTest, ParsedIDs) {
+   EXPECT_EQ(Triple::Fuchsia, T.getOS());
+   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
+ 
++  T = Triple("x86_64-unknown-genode");
++  EXPECT_EQ(Triple::x86_64, T.getArch());
++  EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
++  EXPECT_EQ(Triple::Genode, T.getOS());
++  EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
++
+   T = Triple("x86_64-unknown-hermit");
+   EXPECT_EQ(Triple::x86_64, T.getArch());
+   EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
+diff --git a/utils/benchmark/src/internal_macros.h b/utils/benchmark/src/internal_macros.h
+index f2d54bfcbd9d..e20f891d435b 100644
+--- a/utils/benchmark/src/internal_macros.h
++++ b/utils/benchmark/src/internal_macros.h
+@@ -65,6 +65,8 @@
+ #define BENCHMARK_OS_FUCHSIA 1
+ #elif defined (__SVR4) && defined (__sun)
+ #define BENCHMARK_OS_SOLARIS 1
++#elif defined(__GENODE__)
++  #define BENCHMARK_OS_GENODE 1
+ #endif
+ 
+ #if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \
+diff --git a/utils/gn/secondary/clang/lib/Driver/BUILD.gn b/utils/gn/secondary/clang/lib/Driver/BUILD.gn
+index 04d483a12eed..e487a9a9a016 100644
+--- a/utils/gn/secondary/clang/lib/Driver/BUILD.gn
++++ b/utils/gn/secondary/clang/lib/Driver/BUILD.gn
+@@ -66,6 +66,7 @@ static_library("Driver") {
+     "ToolChains/Flang.cpp",
+     "ToolChains/FreeBSD.cpp",
+     "ToolChains/Fuchsia.cpp",
++    "ToolChains/Genode.cpp",
+     "ToolChains/Gnu.cpp",
+     "ToolChains/HIP.cpp",
+     "ToolChains/Haiku.cpp",

pkgs/development/compilers/llvm/11/llvm.nix

@@ -55,6 +55,8 @@ in stdenv.mkDerivation (rec {
 
   propagatedBuildInputs = [ ncurses zlib ];
 
+  patches = [ ./llvm-genode.patch ];
+
   postPatch = optionalString stdenv.isDarwin ''
     substituteInPlace cmake/modules/AddLLVM.cmake \
       --replace 'set(_install_name_dir INSTALL_NAME_DIR "@rpath")' "set(_install_name_dir)" \