From 09ec07827b1128504457a93dee80b2ceee1af600 Mon Sep 17 00:00:00 2001
From: Vitaly Buka <vitalybuka@google.com>
Date: Wed, 4 Nov 2020 13:10:17 -0800
Subject: [PATCH] [sanitizer] Get Android API from --target

Depends on D90792.

Differential Revision: https://reviews.llvm.org/D90793
---
 compiler-rt/CMakeLists.txt | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/compiler-rt/CMakeLists.txt b/compiler-rt/CMakeLists.txt
index 1871d99615f2..13c082438fb3 100644
--- a/compiler-rt/CMakeLists.txt
+++ b/compiler-rt/CMakeLists.txt
@@ -119,22 +119,10 @@ if ("${COMPILER_RT_DEFAULT_TARGET_TRIPLE}" MATCHES ".*hf$")
     CHECK_SYMBOL_EXISTS (__thumb__ "" COMPILER_RT_ARM_THUMB)
   endif()
 endif()
-
-set(ANDROID_HAS_ELF_TLS 0)
 if ("${COMPILER_RT_DEFAULT_TARGET_TRIPLE}" MATCHES ".*android.*")
   set(ANDROID 1)
-  CHECK_CXX_SOURCE_COMPILES("
-int main() {
-#if __ANDROID_API__ >= 28
-    return 0;
-#else
-  #error NO_ELF_TLS
-  return 1;
-#endif
-}
-  " ANDROID_HAS_ELF_TLS)
   string(REGEX MATCH "-target(=| +)[^ ]+android([0-9]+)" ANDROID_API_LEVEL "${CMAKE_C_FLAGS}")
-  set(ANDROID_API_LEVEL ${CMAKE_MATCH_2}) 
+  set(ANDROID_API_LEVEL ${CMAKE_MATCH_2})
 endif()
 pythonize_bool(ANDROID)
 
@@ -289,7 +277,7 @@ if(NOT COMPILER_RT_HAS_FUNC_SYMBOL)
 endif()
 
 # Provide some common commmandline flags for Sanitizer runtimes.
-if(ANDROID_HAS_ELF_TLS)
+if("${ANDROID_API_LEVEL}" GREATER_EQUAL 28)
   list(APPEND SANITIZER_COMMON_CFLAGS -fno-emulated-tls)
   list(APPEND COMPILER_RT_TEST_COMPILER_CFLAGS -fno-emulated-tls)
 endif()