From 9afb05024d86bcdba8e1a59d81d8c2bf6edbddf6 Mon Sep 17 00:00:00 2001
From: Derek Schuff <dschuff@google.com>
Date: Wed, 26 Aug 2015 17:14:08 +0000
Subject: [PATCH] Change Native Client x86 usr include and link path to match
 SDK expectations

GNU multilib style uses x86_64-nacl/include and x86_64-nacl/usr/include
but the SDK expects i686-nacl/usr/include for its files. Change the driver
to use this.

Fixes https://code.google.com/p/nativeclient/issues/detail?id=4108

Differential Revision: http://reviews.llvm.org/D11271

llvm-svn: 246040
---
 clang/lib/Driver/ToolChains.cpp | 17 +++++++++++++----
 clang/test/Driver/nacl-direct.c |  6 +++---
 2 files changed, 16 insertions(+), 7 deletions(-)

diff --git a/clang/lib/Driver/ToolChains.cpp b/clang/lib/Driver/ToolChains.cpp
index cb4ec03a4ca1..cae992e4a9d5 100644
--- a/clang/lib/Driver/ToolChains.cpp
+++ b/clang/lib/Driver/ToolChains.cpp
@@ -2328,7 +2328,7 @@ NaClToolChain::NaClToolChain(const Driver &D, const llvm::Triple &Triple,
   switch (Triple.getArch()) {
   case llvm::Triple::x86: {
     file_paths.push_back(FilePath + "x86_64-nacl/lib32");
-    file_paths.push_back(FilePath + "x86_64-nacl/usr/lib32");
+    file_paths.push_back(FilePath + "i686-nacl/usr/lib");
     prog_paths.push_back(ProgPath + "x86_64-nacl/bin");
     file_paths.push_back(ToolPath + "i686-nacl");
     break;
@@ -2380,12 +2380,21 @@ void NaClToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
 
   SmallString<128> P(D.Dir + "/../");
   switch (getTriple().getArch()) {
+  case llvm::Triple::x86:
+    // x86 is special because multilib style uses x86_64-nacl/include for libc
+    // headers but the SDK wants i686-nacl/usr/include. The other architectures
+    // have the same substring.
+    llvm::sys::path::append(P, "i686-nacl/usr/include");
+    addSystemInclude(DriverArgs, CC1Args, P.str());
+    llvm::sys::path::remove_filename(P);
+    llvm::sys::path::remove_filename(P);
+    llvm::sys::path::remove_filename(P);
+    llvm::sys::path::append(P, "x86_64-nacl/include");
+    addSystemInclude(DriverArgs, CC1Args, P.str());
+    return;
   case llvm::Triple::arm:
     llvm::sys::path::append(P, "arm-nacl/usr/include");
     break;
-  case llvm::Triple::x86:
-    llvm::sys::path::append(P, "x86_64-nacl/usr/include");
-    break;
   case llvm::Triple::x86_64:
     llvm::sys::path::append(P, "x86_64-nacl/usr/include");
     break;
diff --git a/clang/test/Driver/nacl-direct.c b/clang/test/Driver/nacl-direct.c
index 5fe857622320..f71e14f996ee 100644
--- a/clang/test/Driver/nacl-direct.c
+++ b/clang/test/Driver/nacl-direct.c
@@ -9,7 +9,7 @@
 // CHECK-I686: "-target-cpu" "pentium4"
 // CHECK-I686: "-resource-dir" "foo"
 // CHECK-I686: "-internal-isystem" "foo{{/|\\\\}}include"
-// CHECK-I686: "-internal-isystem" "{{.*}}{{/|\\\\}}..{{/|\\\\}}x86_64-nacl{{/|\\\\}}usr{{/|\\\\}}include"
+// CHECK-I686: "-internal-isystem" "{{.*}}{{/|\\\\}}..{{/|\\\\}}i686-nacl{{/|\\\\}}usr{{/|\\\\}}include"
 // CHECK-I686: "-internal-isystem" "{{.*}}{{/|\\\\}}..{{/|\\\\}}x86_64-nacl{{/|\\\\}}include"
 // CHECK-I686: as{{(.exe)?}}" "--32"
 // CHECK-I686: ld{{(.exe)?}}"
@@ -17,7 +17,7 @@
 // CHECK-I686: "-m" "elf_i386_nacl"
 // CHECK-I686: "-static"
 // CHECK-I686: "-L{{.*}}{{/|\\\\}}..{{/|\\\\}}x86_64-nacl{{/|\\\\}}lib32"
-// CHECK-I686: "-L{{.*}}{{/|\\\\}}..{{/|\\\\}}x86_64-nacl{{/|\\\\}}usr{{/|\\\\}}lib32"
+// CHECK-I686: "-L{{.*}}{{/|\\\\}}..{{/|\\\\}}i686-nacl{{/|\\\\}}usr{{/|\\\\}}lib"
 // CHECK-I686: "-Lfoo{{/|\\\\}}lib{{/|\\\\}}i686-nacl"
 // CHECK-I686-NOT: -lpthread
 //
@@ -118,7 +118,7 @@
 // CHECK-I686-CXX: "-resource-dir" "foo"
 // CHECK-I686-CXX: "-internal-isystem" "{{.*}}{{/|\\\\}}..{{/|\\\\}}x86_64-nacl{{/|\\\\}}include{{/|\\\\}}c++{{/|\\\\}}v1"
 // CHECK-I686-CXX: "-internal-isystem" "foo{{/|\\\\}}include"
-// CHECK-I686-CXX: "-internal-isystem" "{{.*}}{{/|\\\\}}..{{/|\\\\}}x86_64-nacl{{/|\\\\}}usr{{/|\\\\}}include"
+// CHECK-I686-CXX: "-internal-isystem" "{{.*}}{{/|\\\\}}..{{/|\\\\}}i686-nacl{{/|\\\\}}usr{{/|\\\\}}include"
 // CHECK-I686-CXX: "-internal-isystem" "{{.*}}{{/|\\\\}}..{{/|\\\\}}x86_64-nacl{{/|\\\\}}include"
 // CHECK-I686-CXX: "-lpthread"