[cfe-commits] r156771 - in /cfe/trunk: lib/Driver/Tools.cpp test/Driver/nodefaultlib.c

[Chandler Carruth]

Author: chandlerc
Date: Mon May 14 13:31:18 2012
New Revision: 156771

URL: http://llvm.org/viewvc/llvm-project?rev=156771&view=rev
Log:
Teach the driver on Linux to respect -nodefaultlibs.

Patch from Andrew C. Morrow.

Added:
    cfe/trunk/test/Driver/nodefaultlib.c
Modified:
    cfe/trunk/lib/Driver/Tools.cpp

Modified: cfe/trunk/lib/Driver/Tools.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=156771&r1=156770&r2=156771&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/Tools.cpp (original)
+++ cfe/trunk/lib/Driver/Tools.cpp Mon May 14 13:31:18 2012
@@ -5313,7 +5313,9 @@
 
   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs);
 
-  if (D.CCCIsCXX && !Args.hasArg(options::OPT_nostdlib)) {
+  if (D.CCCIsCXX &&
+      !Args.hasArg(options::OPT_nostdlib) &&
+      !Args.hasArg(options::OPT_nodefaultlibs)) {
     bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) &&
       !Args.hasArg(options::OPT_static);
     if (OnlyLibstdcxxStatic)
@@ -5328,22 +5330,23 @@
   addAsanRTLinux(getToolChain(), Args, CmdArgs);
 
   if (!Args.hasArg(options::OPT_nostdlib)) {
-    if (Args.hasArg(options::OPT_static))
-      CmdArgs.push_back("--start-group");
-
-    AddLibgcc(ToolChain.getTriple(), D, CmdArgs, Args);
+    if (!Args.hasArg(options::OPT_nodefaultlibs)) {
+      if (Args.hasArg(options::OPT_static))
+        CmdArgs.push_back("--start-group");
 
-    if (Args.hasArg(options::OPT_pthread) ||
-        Args.hasArg(options::OPT_pthreads))
-      CmdArgs.push_back("-lpthread");
+      AddLibgcc(ToolChain.getTriple(), D, CmdArgs, Args);
 
-    CmdArgs.push_back("-lc");
+      if (Args.hasArg(options::OPT_pthread) ||
+          Args.hasArg(options::OPT_pthreads))
+        CmdArgs.push_back("-lpthread");
 
-    if (Args.hasArg(options::OPT_static))
-      CmdArgs.push_back("--end-group");
-    else
-      AddLibgcc(ToolChain.getTriple(), D, CmdArgs, Args);
+      CmdArgs.push_back("-lc");
 
+      if (Args.hasArg(options::OPT_static))
+        CmdArgs.push_back("--end-group");
+      else
+        AddLibgcc(ToolChain.getTriple(), D, CmdArgs, Args);
+    }
 
     if (!Args.hasArg(options::OPT_nostartfiles)) {
       const char *crtend;

Added: cfe/trunk/test/Driver/nodefaultlib.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/nodefaultlib.c?rev=156771&view=auto
==============================================================================
--- cfe/trunk/test/Driver/nodefaultlib.c (added)
+++ cfe/trunk/test/Driver/nodefaultlib.c Mon May 14 13:31:18 2012
@@ -0,0 +1,8 @@
+// RUN: %clang -target i686-pc-linux-gnu -### -nodefaultlibs %s 2> %t
+// RUN: FileCheck < %t %s
+//
+// CHECK-NOT: start-group
+// CHECK-NOT: -lgcc
+// CHECK-NOT: -lc
+// CHECK: crtbegin
+// CHECK: crtend