Remember sysroot in Driver. Pass it down to ld for NetBSD, FreeBSD

and DragonFly. Use the --sysroot= form for Linux. Fix handling of =
prefix for -B.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@127994 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 2 deletions

diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index bfbf0a0be1..fac8c8c88f 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -287,6 +287,8 @@ Compilation *Driver::BuildCompilation(int argc, const char **argv) {
     A->claim();
     PrefixDirs.push_back(A->getValue(*Args, 0));
   }
+  if (const Arg *A = Args->getLastArg(options::OPT__sysroot_EQ))
+    SysRoot = A->getValue(*Args);
 
   Host = GetHostInfo(DefaultHostTriple.c_str());
 
@@ -1261,7 +1263,12 @@ std::string Driver::GetFilePath(const char *Name, const ToolChain &TC) const {
   // attempting to use this prefix when lokup up program paths.
   for (Driver::prefix_list::const_iterator it = PrefixDirs.begin(),
        ie = PrefixDirs.end(); it != ie; ++it) {
-    llvm::sys::Path P(*it);
+    std::string Dir(*it);
+    if (Dir.empty())
+      continue;
+    if (Dir[0] == '=')
+      Dir = SysRoot + Dir.substr(1);
+    llvm::sys::Path P(Dir);
     P.appendComponent(Name);
     bool Exists;
     if (!llvm::sys::fs::exists(P.str(), Exists) && Exists)
@@ -1271,7 +1278,12 @@ std::string Driver::GetFilePath(const char *Name, const ToolChain &TC) const {
   const ToolChain::path_list &List = TC.getFilePaths();
   for (ToolChain::path_list::const_iterator
          it = List.begin(), ie = List.end(); it != ie; ++it) {
-    llvm::sys::Path P(*it);
+    std::string Dir(*it);
+    if (Dir.empty())
+      continue;
+    if (Dir[0] == '=')
+      Dir = SysRoot + Dir.substr(1);
+    llvm::sys::Path P(Dir);
     P.appendComponent(Name);
     bool Exists;
     if (!llvm::sys::fs::exists(P.str(), Exists) && Exists)