Pass -pie to linker when generating executable on Android

This fixes problem with LTO on Android.

Differential Revision: http://reviews.llvm.org/D2668

llvm-svn: 207520

clang/lib/Driver/Tools.cpp

@@ -6917,7 +6917,10 @@ void gnutools::Link::ConstructJob(Compilation &C, const JobAction &JA,
     ToolChain.getTriple().getEnvironment() == llvm::Triple::Android;
   const bool IsPIE =
     !Args.hasArg(options::OPT_shared) &&
-    (Args.hasArg(options::OPT_pie) || ToolChain.isPIEDefault());
+    !Args.hasArg(options::OPT_static) &&
+    (Args.hasArg(options::OPT_pie) || ToolChain.isPIEDefault() ||
+     // On Android every code is PIC so every executable is PIE
+     isAndroid);
 
   ArgStringList CmdArgs;
 

clang/test/Driver/gold-lto.c

@@ -19,3 +19,8 @@
 // CHECK-ARM-V7A: "-plugin" "{{.*}}/LLVMgold.so"
 // CHECK-ARM-V7A: "-plugin-opt=mcpu=cortex-a8"
 // CHECK-ARM-V7A: "-plugin-opt=foo"
+//
+// RUN: %clang -target i686-linux-android -### %t.o -flto 2>&1 \
+// RUN:     | FileCheck %s --check-prefix=CHECK-X86-ANDROID
+// CHECK-X86-ANDROID: "-pie"
+// CHECK-X86-ANDROID: "-plugin" "{{.*}}/LLVMgold.so"