[PATCH] aarch64' Android Support

[林作健]

The following patch aims to add support to android for aarch64 architecture.

diff --git a/gcc/config.gcc b/gcc/config.gcc
index 09fb9ecd2cd..a8b32e34b47 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -1022,8 +1022,9 @@ aarch64*-*-freebsd*)
  tm_defines="${tm_defines}  TARGET_DEFAULT_ASYNC_UNWIND_TABLES=1"
  ;;
 aarch64*-*-linux*)
- tm_file="${tm_file} dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h"
+ tm_file="${tm_file} dbxelf.h elfos.h gnu-user.h linux.h
linux-android.h glibc-stdint.h"
  tm_file="${tm_file} aarch64/aarch64-elf.h aarch64/aarch64-linux.h"
+ extra_options="${extra_options} linux-android.opt"
  tmake_file="${tmake_file} aarch64/t-aarch64 aarch64/t-aarch64-linux"
  tm_defines="${tm_defines}  TARGET_DEFAULT_ASYNC_UNWIND_TABLES=1"
  case $target in
diff --git a/gcc/config/aarch64/aarch64-linux.h
b/gcc/config/aarch64/aarch64-linux.h
index 5e8b34ded03..e1700bf7db6 100644
--- a/gcc/config/aarch64/aarch64-linux.h
+++ b/gcc/config/aarch64/aarch64-linux.h
@@ -62,22 +62,33 @@
   " %{mfix-cortex-a53-843419:--fix-cortex-a53-843419}"
 #endif

-#define LINK_SPEC LINUX_TARGET_LINK_SPEC \
+#define LINK_SPEC LINUX_OR_ANDROID_LD (LINUX_TARGET_LINK_SPEC, \
+        LINUX_TARGET_LINK_SPEC " " ANDROID_LINK_SPEC) \
                   CA53_ERR_835769_SPEC \
                   CA53_ERR_843419_SPEC

+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC \
+  LINUX_OR_ANDROID_LD (GNU_USER_TARGET_STARTFILE_SPEC, ANDROID_STARTFILE_SPEC)
+
 #define GNU_USER_TARGET_MATHFILE_SPEC \
   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"

 #undef ENDFILE_SPEC
-#define ENDFILE_SPEC   \
-  GNU_USER_TARGET_MATHFILE_SPEC " " \
-  GNU_USER_TARGET_ENDFILE_SPEC
+#define ENDFILE_SPEC \
+  LINUX_OR_ANDROID_LD (GNU_USER_TARGET_MATHFILE_SPEC " " \
+      GNU_USER_TARGET_ENDFILE_SPEC, ANDROID_ENDFILE_SPEC)
+
+#undef  LIB_SPEC
+#define LIB_SPEC \
+  LINUX_OR_ANDROID_LD (GNU_USER_TARGET_LIB_SPEC, \
+     GNU_USER_TARGET_NO_PTHREADS_LIB_SPEC " " ANDROID_LIB_SPEC)

 #define TARGET_OS_CPP_BUILTINS() \
   do \
     { \
  GNU_USER_TARGET_OS_CPP_BUILTINS(); \
+ ANDROID_TARGET_OS_CPP_BUILTINS(); \
     } \
   while (0)