[LDC] compiler-rt: Work around compile errors for Android

Author: kinke

compiler-rt/lib/builtins/CMakeLists.txt

@@ -572,6 +572,11 @@ elseif(NOT WIN32)
   )
 endif()
 
+if (ANDROID)
+  # FIXME: clear_cache.c:87:20: error: write to reserved register 'R7'
+  list(REMOVE_ITEM arm_SOURCES clear_cache.c)
+endif()
+
 set(aarch64_SOURCES
   ${GENERIC_TF_SOURCES}
   ${GENERIC_SOURCES}

compiler-rt/lib/hwasan/hwasan_linux.cpp

@@ -26,6 +26,12 @@
 #  include <sys/prctl.h>
 #  include <sys/resource.h>
 #  include <sys/time.h>
+#  if defined(__ANDROID__)
+#    // SSIZE_MAX required by unistd.h; somehow including limits.h explicitly doesn't work either
+#    if !defined(SSIZE_MAX) && defined(__LP64__)
+#      define SSIZE_MAX 0x7fffffffffffffffL
+#    endif
+#  endif
 #  include <unistd.h>
 #  include <unwind.h>