Driver: Add a -stdlib= argument which can be used to select the C++ standard
library to use.
- This is currently useful for testing libc++; you can now use 'clang++
-stdlib=libc++ t.cpp' to compile using it if installed.
- In the future could also be used to select other standard library choices if
alternatives become available (for example, to use an alternate C library).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113891 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/ToolChain.cpp b/lib/Driver/ToolChain.cpp
index 0f63046..337ea4e 100644
--- a/lib/Driver/ToolChain.cpp
+++ b/lib/Driver/ToolChain.cpp
@@ -175,6 +175,16 @@
}
ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{
+ if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) {
+ llvm::StringRef Value = A->getValue(Args);
+ if (Value == "libc++")
+ return ToolChain::CST_Libcxx;
+ if (Value == "libstdc++")
+ return ToolChain::CST_Libstdcxx;
+ getDriver().Diag(clang::diag::err_drv_invalid_stdlib_name)
+ << A->getAsString(Args);
+ }
+
return ToolChain::CST_Libstdcxx;
}
@@ -183,6 +193,11 @@
CXXStdlibType Type = GetCXXStdlibType(Args);
switch (Type) {
+ case ToolChain::CST_Libcxx:
+ CmdArgs.push_back("-cxx-system-include");
+ CmdArgs.push_back("/usr/include/c++/v1");
+ break;
+
case ToolChain::CST_Libstdcxx:
// Currently handled by the mass of goop in InitHeaderSearch.
break;
@@ -194,6 +209,10 @@
CXXStdlibType Type = GetCXXStdlibType(Args);
switch (Type) {
+ case ToolChain::CST_Libcxx:
+ CmdArgs.push_back("-lc++");
+ break;
+
case ToolChain::CST_Libstdcxx:
CmdArgs.push_back("-lstdc++");
break;