Make Compiler-RT build for AArch64.

lib/builtins/CMakeLists.txt

@@ -242,10 +242,13 @@ set(arm_SOURCES
   arm/unordsf2vfp.S
   ${GENERIC_SOURCES})
 
+set(aarch64_SOURCES
+  ${GENERIC_SOURCES})
+
 add_custom_target(builtins)
 
 if (NOT WIN32)
-  foreach(arch x86_64 i386 arm)
+  foreach(arch x86_64 i386 arm aarch64)
     if(CAN_TARGET_${arch})
       add_compiler_rt_runtime(clang_rt.${arch} ${arch} STATIC
         SOURCES ${${arch}_SOURCES}

lib/builtins/Makefile.mk

@@ -11,7 +11,7 @@ ModuleName := builtins
 SubDirs :=
 
 # Add arch specific optimized implementations.
-SubDirs += i386 ppc x86_64 arm
+SubDirs += i386 ppc x86_64 arm aarch64
 
 # Define the variables for this specific directory.
 Sources := $(foreach file,$(wildcard $(Dir)/*.c),$(notdir $(file)))

lib/builtins/aarch64/Makefile.mk

@@ -0,0 +1,22 @@
+#===- lib/builtins/aarch64/Makefile.mk ---------------------*- Makefile -*--===#
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+#===------------------------------------------------------------------------===#
+
+ModuleName := builtins
+SubDirs := 
+OnlyArchs := aarch64
+
+AsmSources := $(foreach file,$(wildcard $(Dir)/*.S),$(notdir $(file)))
+Sources := $(foreach file,$(wildcard $(Dir)/*.c),$(notdir $(file)))
+ObjNames := $(Sources:%.c=%.o) $(AsmSources:%.S=%.o)
+Implementation := Optimized
+
+# FIXME: use automatic dependencies?
+Dependencies := $(wildcard lib/*.h $(Dir)/*.h)
+
+CFLAGS.builtins := $(CFLAGS) -std=c99

lib/builtins/clear_cache.c

@@ -25,6 +25,10 @@
   #include <asm/unistd.h>
 #endif
 
+#if defined(__aarch64__) && !defined(__APPLE__)
+  #include <stddef.h>
+#endif
+
 /*
  * The compiler generates calls to __clear_cache() when creating 
  * trampoline functions on the stack for use with nested functions.