[Solaris] Only define _REENTRANT if -pthread

When looking at lib/Basic/Targets/OSTargets.h, I noticed that _REENTRANT is defined
unconditionally on Solaris, unlike all other targets and what either Studio cc (only define
it with -mt) or gcc (only define it with -pthread) do.

This patch follows that lead.

Differential Revision: https://reviews.llvm.org/D41241

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@332343 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Basic/Targets/OSTargets.h b/lib/Basic/Targets/OSTargets.h
index a669a275dcf4d714a060ebcceaae5746627660f4..18239a2ec77f24e8f6b225ed6dec8b645cfd65da 100644 (file)
--- a/lib/Basic/Targets/OSTargets.h
+++ b/lib/Basic/Targets/OSTargets.h
@@ -551,7 +551,8 @@ protected:
     Builder.defineMacro("_LARGEFILE_SOURCE");
     Builder.defineMacro("_LARGEFILE64_SOURCE");
     Builder.defineMacro("__EXTENSIONS__");
-    Builder.defineMacro("_REENTRANT");
+    if (Opts.POSIXThreads)
+      Builder.defineMacro("_REENTRANT");
     if (this->HasFloat128)
       Builder.defineMacro("__FLOAT128__");
   }