clang: Support -nopie flag

[termux-packages] / packages / clang / tools-clang-lib-Driver-Tools.cpp.patch

diff -u -r ../llvm-3.8.1.src/tools/clang/lib/Driver/Tools.cpp ./tools/clang/lib/Driver/Tools.cpp
--- ../llvm-3.8.1.src/tools/clang/lib/Driver/Tools.cpp	2016-02-12 17:51:41.000000000 -0500
+++ ./tools/clang/lib/Driver/Tools.cpp	2016-08-18 10:00:30.287138752 -0400
@@ -733,11 +733,11 @@
         ABI = FloatABI::SoftFP;
         break;
       case llvm::Triple::Android:
-        ABI = (SubArch == 7) ? FloatABI::SoftFP : FloatABI::Soft;
+        ABI = FloatABI::SoftFP;
         break;
       default:
         // Assume "soft", but warn the user we are guessing.
-        ABI = FloatABI::Soft;
+        ABI = FloatABI::SoftFP;
         if (Triple.getOS() != llvm::Triple::UnknownOS ||
             !Triple.isOSBinFormatMachO())
           D.Diag(diag::warn_drv_assuming_mfloat_abi_is) << "soft";
@@ -8773,9 +8773,18 @@
 
   const llvm::Triple::ArchType Arch = ToolChain.getArch();
   const bool isAndroid = ToolChain.getTriple().isAndroid();
   const bool IsPIE =
       !Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_static) &&
-      (Args.hasArg(options::OPT_pie) || ToolChain.isPIEDefault());
+      (Args.hasArg(options::OPT_pie) || ToolChain.isPIEDefault()
+       /* Termux modification: Revert
+	   http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20150302/124624.html
+          as we really want pie by default: */
+       // On Android every code is PIC so every executable is PIE
+       // Cannot use isPIEDefault here since otherwise
+       // PIE only logic will be enabled during compilation
+       || isAndroid)
+       && !Args.hasArg(options::OPT_nopie);
+
   const bool HasCRTBeginEndFiles =
       ToolChain.getTriple().hasEnvironment() ||
       (ToolChain.getTriple().getVendor() != llvm::Triple::MipsTechnologies);