[Driver] Also obey -nostdlib++ when rewriting -lstdc++.

Reviewers: pirama

Reviewed By: pirama

Subscribers: cfe-commits

Differential Revision: https://reviews.llvm.org/D55856

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@349570 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 413956eb18e4cae505297f7dfe30d81d27506b59..dfc0faac7b8d8978c6e65c0d1ab09e481c1fbd4b 100644 (file)
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -303,6 +303,7 @@ DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
   DerivedArgList *DAL = new DerivedArgList(Args);
 
   bool HasNostdlib = Args.hasArg(options::OPT_nostdlib);
+  bool HasNostdlibxx = Args.hasArg(options::OPT_nostdlibxx);
   bool HasNodefaultlib = Args.hasArg(options::OPT_nodefaultlibs);
   for (Arg *A : Args) {
     // Unfortunately, we have to parse some forwarding options (-Xassembler,
@@ -347,7 +348,8 @@ DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
       StringRef Value = A->getValue();
 
       // Rewrite unless -nostdlib is present.
-      if (!HasNostdlib && !HasNodefaultlib && Value == "stdc++") {
+      if (!HasNostdlib && !HasNodefaultlib && !HasNostdlibxx &&
+          Value == "stdc++") {
         DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_reserved_lib_stdcxx));
         continue;
       }

diff --git a/test/Driver/nostdlibxx.cpp b/test/Driver/nostdlibxx.cpp
index 02bd62d96af5a02e0d8a874f12a0dbc639bc1bb6..48d14e15a61f9bf0ed7c2087486e179bce9c04e8 100644 (file)
--- a/test/Driver/nostdlibxx.cpp
+++ b/test/Driver/nostdlibxx.cpp
@@ -6,3 +6,12 @@
 // CHECK-NOT: -lstdc++
 // CHECK-NOT: -lc++
 // CHECK: -lm
+
+// Make sure -lstdc++ isn't rewritten to the default stdlib when -nostdlib++ is
+// used.
+//
+// RUN: %clangxx -target i686-pc-linux-gnu -### \
+// RUN:     -nostdlib++ -stdlib=libc++ -lstdc++ %s 2> %t
+// RUN: FileCheck --check-prefix=CHECK-RESERVED-LIB-REWRITE < %t %s
+// CHECK-RESERVED-LIB-REWRITE: -lstdc++
+// CHECK-RESERVED-LIB-REWRITE-NOT: -lc++