termux-packages/packages/libllvm/tools-clang-lib-Driver-ToolChains-Gnu.cpp.patch

diff -u -r ../llvm-5.0.0.src/tools/clang/lib/Driver/ToolChains/Gnu.cpp ./tools/clang/lib/Driver/ToolChains/Gnu.cpp
--- ../llvm-5.0.0.src/tools/clang/lib/Driver/ToolChains/Gnu.cpp	2017-08-11 03:47:32.000000000 +0200
+++ ./tools/clang/lib/Driver/ToolChains/Gnu.cpp	2017-09-10 20:14:54.636653647 +0200
@@ -152,14 +152,11 @@
     }
   }
 
-  const std::string &customGCCName = D.getCCCGenericGCCName();
-  const char *GCCName;
-  if (!customGCCName.empty())
-    GCCName = customGCCName.c_str();
-  else if (D.CCCIsCXX()) {
-    GCCName = "g++";
-  } else
-    GCCName = "gcc";
+  // Termux modification: Disable calling into gcc from clang.
+  // Clang calls into gcc if it tries to compile a language it doesn't understand.
+  // On Termux gcc is a symlink to clang, so this leads into fork loop until
+  // the whole system runs out of memory.
+  const char *GCCName = "false";
 
   const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath(GCCName));
   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
@@ -415,9 +412,12 @@
   const llvm::Triple::ArchType Arch = ToolChain.getArch();
   const bool isAndroid = ToolChain.getTriple().isAndroid();
   const bool IsIAMCU = ToolChain.getTriple().isOSIAMCU();
+  // Termux modification: Enable pie by default for Android
+  // and support the nopie flag.
   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() || isAndroid) &&
+      !Args.hasArg(options::OPT_nopie);
   const bool HasCRTBeginEndFiles =
       ToolChain.getTriple().hasEnvironment() ||
       (ToolChain.getTriple().getVendor() != llvm::Triple::MipsTechnologies);