Add packages for bootstrapping Clang subsystem

clang/0002-Fix-GetHostTriple-for-mingw-w64-in-msys.patch

@@ -0,0 +1,29 @@
+From b47a00af69f3c662e54dc54e482fc9b0d4ba6480 Mon Sep 17 00:00:00 2001
+From: Martell Malone <martellmalone@gmail.com>
+Date: Sun, 28 Jun 2015 20:14:51 +0100
+Subject: [PATCH 2/5] Fix GetHostTriple for mingw-w64 in msys
+
+---
+ cmake/modules/GetHostTriple.cmake | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/cmake/modules/GetHostTriple.cmake b/cmake/modules/GetHostTriple.cmake
+index 0cad1db4eff..47e9f986e15 100644
+--- a/cmake/modules/GetHostTriple.cmake
++++ b/cmake/modules/GetHostTriple.cmake
+@@ -8,11 +8,11 @@
+     else()
+       set( value "i686-pc-windows-msvc" )
+     endif()
+-  elseif( MINGW AND NOT MSYS )
++  elseif( MINGW )
+     if( CMAKE_SIZEOF_VOID_P EQUAL 8 )
+       set( value "x86_64-w64-windows-gnu" )
+     else()
+-      set( value "i686-pc-windows-gnu" )
++      set( value "i686-w64-windows-gnu" )
+     endif()
+   else( MSVC )
+     set(config_guess ${LLVM_MAIN_SRC_DIR}/cmake/config.guess)
+2.13.3
+

clang/0004-llvm-config-look-for-unversioned-shared-lib-on-win32.patch

@@ -0,0 +1,37 @@
+From 56c0371a3cbc98ef5dc039324ad43c153ff601c4 Mon Sep 17 00:00:00 2001
+From: Mateusz Mikula <mati865@gmail.com>
+Date: Thu, 2 Feb 2017 11:48:25 +0100
+Subject: [PATCH 4/5] llvm-config: look for unversioned shared lib on win32
+
+---
+ tools/llvm-config/llvm-config.cpp | 8 +++++---
+ 1 file changed, 5 insertions(+), 3 deletions(-)
+
+diff --git a/tools/llvm-config/llvm-config.cpp b/tools/llvm-config/llvm-config.cpp
+index 08b096afb05..e388d9e5d3f 100644
+--- a/tools/llvm-config/llvm-config.cpp
++++ b/tools/llvm-config/llvm-config.cpp
+@@ -353,10 +353,11 @@ int main(int argc, char **argv) {
+   const Triple HostTriple(Triple::normalize(LLVM_HOST_TRIPLE));
+   if (HostTriple.isOSWindows()) {
+     SharedExt = "dll";
+-    SharedVersionedExt = LLVM_DYLIB_VERSION ".dll";
++    SharedVersionedExt = ".dll";
+     if (HostTriple.isOSCygMing()) {
+       StaticExt = "a";
+       StaticPrefix = "lib";
++      SharedPrefix = "lib";
+     } else {
+       StaticExt = "lib";
+       DirSep = "\\";
+@@ -393,7 +393,7 @@
+
+   bool DyLibExists = false;
+   const std::string DyLibName =
+-      (SharedPrefix + "LLVM-" + SharedVersionedExt).str();
++      (SharedPrefix + (HostTriple.isOSWindows() ? "LLVM" : "LLVM-") + SharedVersionedExt).str();
+
+   // If LLVM_LINK_DYLIB is ON, the single shared library will be returned
+   // for "--libs", etc, if they exist. This behaviour can be overridden with
+-- 
+2.13.3

clang/0006-add-coff-exported-flag.patch

@@ -0,0 +1,14 @@
+Index: lib/Object/COFFObjectFile.cpp
+===================================================================
+--- a/lib/Object/COFFObjectFile.cpp	(Revision 274558)
++++ b/lib/Object/COFFObjectFile.cpp	(Arbeitskopie)
+@@ -217,6 +217,9 @@
+   if (Symb.isExternal() || Symb.isWeakExternal())
+     Result |= SymbolRef::SF_Global;
+
++  if (Symb.isExternal())
++    Result |= SymbolRef::SF_Exported;
++
+   if (const coff_aux_weak_external *AWE = Symb.getWeakExternal()) {
+     Result |= SymbolRef::SF_Weak;
+     if (AWE->Characteristics != COFF::IMAGE_WEAK_EXTERN_SEARCH_ALIAS)

clang/0007-getLoadAddressWithOffset-assertion.patch

@@ -0,0 +1,45 @@
+Index: lib/ExecutionEngine/RuntimeDyld/Targets/RuntimeDyldCOFFI386.h
+===================================================================
+--- a/lib/ExecutionEngine/RuntimeDyld/Targets/RuntimeDyldCOFFI386.h	(revision 283036)
++++ b/lib/ExecutionEngine/RuntimeDyld/Targets/RuntimeDyldCOFFI386.h	(working copy)
+@@ -142,8 +142,7 @@
+       uint64_t Result =
+           RE.Sections.SectionA == static_cast<uint32_t>(-1)
+               ? Value
+-              : Sections[RE.Sections.SectionA].getLoadAddressWithOffset(
+-                    RE.Addend);
++              : Sections[RE.Sections.SectionA].getLoadAddress() + RE.Addend;
+       assert(Result <= UINT32_MAX && "relocation overflow");
+       DEBUG(dbgs() << "\t\tOffset: " << RE.Offset
+                    << " RelType: IMAGE_REL_I386_DIR32"
+@@ -159,7 +158,7 @@
+       // The target's 32-bit RVA.
+       // NOTE: use Section[0].getLoadAddress() as an approximation of ImageBase
+       uint64_t Result =
+-          Sections[RE.Sections.SectionA].getLoadAddressWithOffset(RE.Addend) -
++          Sections[RE.Sections.SectionA].getLoadAddress() + RE.Addend -
+           Sections[0].getLoadAddress();
+       assert(static_cast<int32_t>(Result) <= INT32_MAX &&
+              "relocation overflow");
+Index: lib/ExecutionEngine/RuntimeDyld/Targets/RuntimeDyldCOFFThumb.h
+===================================================================
+--- a/lib/ExecutionEngine/RuntimeDyld/Targets/RuntimeDyldCOFFThumb.h	(revision 283036)
++++ b/lib/ExecutionEngine/RuntimeDyld/Targets/RuntimeDyldCOFFThumb.h	(working copy)
+@@ -184,7 +184,7 @@
+       uint64_t Result =
+           RE.Sections.SectionA == static_cast<uint32_t>(-1)
+               ? Value
+-              : Sections[RE.Sections.SectionA].getLoadAddressWithOffset(RE.Addend);
++              : Sections[RE.Sections.SectionA].getLoadAddress() + RE.Addend;
+       Result |= ISASelectionBit;
+       assert(Result <= UINT32_MAX && "relocation overflow");
+       DEBUG(dbgs() << "\t\tOffset: " << RE.Offset
+@@ -229,7 +229,7 @@
+     case COFF::IMAGE_REL_ARM_MOV32T: {
+       // 32-bit VA of the target applied to a contiguous MOVW+MOVT pair.
+       uint64_t Result =
+-          Sections[RE.Sections.SectionA].getLoadAddressWithOffset(RE.Addend);
++          Sections[RE.Sections.SectionA].getLoadAddress() + RE.Addend;
+       assert(Result <= UINT32_MAX && "relocation overflow");
+       DEBUG(dbgs() << "\t\tOffset: " << RE.Offset
+                    << " RelType: IMAGE_REL_ARM_MOV32T"

clang/0009-empty-target-prefix-only-msvc.patch

@@ -0,0 +1,11 @@
+--- llvm-6.0.0.src/cmake/modules/AddLLVM.cmake.orig	2018-06-01 17:52:24.905810400 +0300
++++ llvm-6.0.0.src/cmake/modules/AddLLVM.cmake	2018-06-01 17:54:31.858071700 +0300
+@@ -473,7 +473,7 @@
+   endif()
+
+   if(ARG_SHARED)
+-    if(WIN32)
++    if(MSVC)
+       set_target_properties(${name} PROPERTIES
+         PREFIX ""
+         )

clang/0010-mbig-obj-for-all.patch

@@ -0,0 +1,13 @@
+--- llvm-6.0.0.src/cmake/modules/HandleLLVMOptions.cmake.orig	2018-06-06 14:33:51.928460200 +0300
++++ llvm-6.0.0.src/cmake/modules/HandleLLVMOptions.cmake	2018-06-06 14:33:59.840471400 +0300
+@@ -312,9 +312,7 @@
+   # Pass -mbig-obj to mingw gas on Win64. COFF has a 2**16 section limit, and
+   # on Win64, every COMDAT function creates at least 3 sections: .text, .pdata,
+   # and .xdata.
+-  if (CMAKE_SIZEOF_VOID_P EQUAL 8)
+-    append("-Wa,-mbig-obj" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+-  endif()
++  append("-Wa,-mbig-obj" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+ endif()
+
+ if( MSVC )