From: Douglas Katzman <dougk@google.com>
Date: Fri, 2 Oct 2015 18:39:08 +0000 (+0000)
Subject: [Myriad]: Accept '-nostdlib' option
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=fa376cc4006140bdf7794272f241b1e37fa73645;p=clang

[Myriad]: Accept '-nostdlib' option

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@249166 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 932122236b..f20e5cd8ef 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -9760,6 +9760,8 @@ void tools::Myriad::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   const llvm::Triple &T = TC.getTriple();
   ArgStringList CmdArgs;
   bool UseStartfiles = !Args.hasArg(options::OPT_nostartfiles);
+  bool UseDefaultLibs = !Args.hasArg(options::OPT_nostdlib) &&
+                        !Args.hasArg(options::OPT_nodefaultlibs);
 
   std::string StartFilesDir, BuiltinLibDir;
   TC.getCompilerSupportDir(StartFilesDir);
@@ -9796,27 +9798,31 @@ void tools::Myriad::Linker::ConstructJob(Compilation &C, const JobAction &JA,
                             options::OPT_e, options::OPT_s, options::OPT_t,
                             options::OPT_Z_Flag, options::OPT_r});
 
-  // The linker doesn't use these builtin paths unless directed to,
-  // because it was not compiled for support with sysroots, nor does
-  // it have a default of little-endian with FPU.
-  CmdArgs.push_back(Args.MakeArgString("-L" + BuiltinLibDir));
-  CmdArgs.push_back(Args.MakeArgString("-L" + StartFilesDir));
+  if (UseDefaultLibs) {
+    // The linker doesn't use these builtin paths unless directed to,
+    // because it was not compiled for support with sysroots, nor does
+    // it have a default of little-endian with FPU.
+    CmdArgs.push_back(Args.MakeArgString("-L" + BuiltinLibDir));
+    CmdArgs.push_back(Args.MakeArgString("-L" + StartFilesDir));
+  }
 
   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs);
 
-  if (T.getOS() == llvm::Triple::RTEMS) {
-    CmdArgs.push_back("--start-group");
-    CmdArgs.push_back("-lc");
-    // You must provide your own "-L" option to enable finding these.
-    CmdArgs.push_back("-lrtemscpu");
-    CmdArgs.push_back("-lrtemsbsp");
-    CmdArgs.push_back("--end-group");
-  } else {
-    CmdArgs.push_back("-lc");
+  if (UseDefaultLibs) {
+    if (T.getOS() == llvm::Triple::RTEMS) {
+      CmdArgs.push_back("--start-group");
+      CmdArgs.push_back("-lc");
+      // You must provide your own "-L" option to enable finding these.
+      CmdArgs.push_back("-lrtemscpu");
+      CmdArgs.push_back("-lrtemsbsp");
+      CmdArgs.push_back("--end-group");
+    } else {
+      CmdArgs.push_back("-lc");
+    }
+    if (C.getDriver().CCCIsCXX())
+      CmdArgs.push_back("-lstdc++");
+    CmdArgs.push_back("-lgcc");
   }
-  if (C.getDriver().CCCIsCXX())
-    CmdArgs.push_back("-lstdc++");
-  CmdArgs.push_back("-lgcc");
   if (UseStartfiles) {
     CmdArgs.push_back(Args.MakeArgString(StartFilesDir + "/crtend.o"));
     CmdArgs.push_back(Args.MakeArgString(StartFilesDir + "/crtn.o"));
diff --git a/test/Driver/myriad-toolchain.c b/test/Driver/myriad-toolchain.c
index 9760d7b2f4..9db62f5f8e 100644
--- a/test/Driver/myriad-toolchain.c
+++ b/test/Driver/myriad-toolchain.c
@@ -53,3 +53,7 @@
 // RUN: %clang -target shave-myriad -c %s -o foo.o -### -MD -MF dep.d 2>&1 \
 // RUN:   | FileCheck %s -check-prefix=MDMF
 // MDMF: "-S" "-MD" "-MF" "dep.d" "-MT" "foo.o"
+
+// RUN: %clang -target sparc-myriad -### -nostdlib %s 2>&1 | FileCheck %s --check-prefix=NOSTDLIB
+//
+// NOSTDLIB-NOT: "-lc"