Add basic support for -pthread.

 - Patch by David Chisnall, with PCH and Darwin support mixed in.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@80883 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 12 insertions, 0 deletions

diff --git a/lib/Basic/Targets.cpp b/lib/Basic/Targets.cpp
index 305ca2d8d2..d9cd42c323 100644
--- a/lib/Basic/Targets.cpp
+++ b/lib/Basic/Targets.cpp
@@ -102,6 +102,9 @@ static void getDarwinDefines(std::vector<char> &Defs, const LangOptions &Opts) {
     Define(Defs, "__STATIC__");
   else
     Define(Defs, "__DYNAMIC__");
+
+  if (Opts.POSIXThreads)
+    Define(Defs, "_REENTRANT", "1");
 }
 
 static void getDarwinOSXDefines(std::vector<char> &Defs,
@@ -272,6 +275,8 @@ protected:
     DefineStd(Defs, "linux", Opts);
     Define(Defs, "__gnu_linux__");
     Define(Defs, "__ELF__", "1");
+    if (Opts.POSIXThreads)
+      Define(Defs, "_REENTRANT", "1");
   }
 public:
   LinuxTargetInfo(const std::string& triple) 
@@ -290,6 +295,8 @@ protected:
     Define(Defs, "__NetBSD__", "1");
     Define(Defs, "__unix__", "1");
     Define(Defs, "__ELF__", "1");
+    if (Opts.POSIXThreads)
+      Define(Defs, "_POSIX_THREADS", "1");
   }
 public:
   NetBSDTargetInfo(const std::string &triple) 
@@ -309,6 +316,8 @@ protected:
     Define(Defs, "__OpenBSD__", "1");
     DefineStd(Defs, "unix", Opts);
     Define(Defs, "__ELF__", "1");
+    if (Opts.POSIXThreads)
+      Define(Defs, "_POSIX_THREADS", "1");
   }
 public:
   OpenBSDTargetInfo(const std::string &triple) 
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index e93e6429eb..b7357ec13a 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -517,6 +517,8 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   Args.AddLastArg(CmdArgs, options::OPT_fvisibility_EQ);
   Args.AddLastArg(CmdArgs, options::OPT_fwritable_strings);
 
+  Args.AddLastArg(CmdArgs, options::OPT_pthread);
+
   // Forward stack protector flags.
   if (Arg *A = Args.getLastArg(options::OPT_fno_stack_protector,
                                options::OPT_fstack_protector_all,
diff --git a/lib/Frontend/PCHReader.cpp b/lib/Frontend/PCHReader.cpp
index cb008c0ea2..55dbd978f1 100644
--- a/lib/Frontend/PCHReader.cpp
+++ b/lib/Frontend/PCHReader.cpp
@@ -78,6 +78,7 @@ PCHValidator::ReadLanguageOptions(const LangOptions &LangOpts) {
   PARSE_LANGOPT_IMPORTANT(NoBuiltin, diag::warn_pch_builtins);
   PARSE_LANGOPT_IMPORTANT(ThreadsafeStatics, 
                           diag::warn_pch_thread_safe_statics);
+  PARSE_LANGOPT_IMPORTANT(POSIXThreads, diag::warn_pch_posix_threads);
   PARSE_LANGOPT_IMPORTANT(Blocks, diag::warn_pch_blocks);
   PARSE_LANGOPT_BENIGN(EmitAllDecls);
   PARSE_LANGOPT_IMPORTANT(MathErrno, diag::warn_pch_math_errno);