clang: Support -nopie flag

packages/clang/build.sh

@@ -2,7 +2,7 @@ TERMUX_PKG_HOMEPAGE=http://clang.llvm.org/
 TERMUX_PKG_DESCRIPTION="C and C++ frontend for the LLVM compiler"
 _PKG_MAJOR_VERSION=3.8
 TERMUX_PKG_VERSION=${_PKG_MAJOR_VERSION}.1
-TERMUX_PKG_BUILD_REVISION=2
+TERMUX_PKG_BUILD_REVISION=3
 TERMUX_PKG_SRCURL=http://llvm.org/releases/${TERMUX_PKG_VERSION}/llvm-${TERMUX_PKG_VERSION}.src.tar.xz
 TERMUX_PKG_HOSTBUILD=true
 TERMUX_PKG_RM_AFTER_INSTALL="bin/macho-dump bin/bugpoint bin/llvm-tblgen lib/BugpointPasses.so lib/LLVMHello.so"

packages/clang/tools-clang-lib-Driver-ToolChains.cpp.patch

@@ -1,15 +0,0 @@
-See http://lists.llvm.org/pipermail/cfe-commits/Week-of-Mon-20150302/124624.html
-where PIE as default on Android was removed. This patch brings it back.
-
-diff -u -r ../llvm-3.7.0.src/tools/clang/lib/Driver/ToolChains.cpp ./tools/clang/lib/Driver/ToolChains.cpp
---- ../llvm-3.7.0.src/tools/clang/lib/Driver/ToolChains.cpp	2015-07-13 19:27:56.000000000 -0400
-+++ ./tools/clang/lib/Driver/ToolChains.cpp	2015-09-04 10:38:53.984720577 -0400
-@@ -3598,7 +3598,7 @@
-   }
- }
- 
--bool Linux::isPIEDefault() const { return getSanitizerArgs().requiresPIE(); }
-+bool Linux::isPIEDefault() const { return true; }
- 
- SanitizerMask Linux::getSupportedSanitizers() const {
-   const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;

packages/clang/tools-clang-lib-Driver-Tools.cpp.patch

@@ -1,6 +1,6 @@
-diff -u -r ../llvm-3.8.0.src/tools/clang/lib/Driver/Tools.cpp ./tools/clang/lib/Driver/Tools.cpp
+diff -u -r ../llvm-3.8.1.src/tools/clang/lib/Driver/Tools.cpp ./tools/clang/lib/Driver/Tools.cpp
---- ../llvm-3.8.0.src/tools/clang/lib/Driver/Tools.cpp	2016-02-12 17:51:41.000000000 -0500
+--- ../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	2016-05-01 23:01:30.148998957 -0400
++++ ./tools/clang/lib/Driver/Tools.cpp	2016-08-18 10:00:30.287138752 -0400
 @@ -733,11 +733,11 @@
          ABI = FloatABI::SoftFP;
          break;
@@ -15,3 +15,23 @@ diff -u -r ../llvm-3.8.0.src/tools/clang/lib/Driver/Tools.cpp ./tools/clang/lib/
          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);