From dcd606e1e1bf7a065d0ad25ec5bb2f9c22fb5c7b Mon Sep 17 00:00:00 2001
From: John Maddock <john@johnmaddock.co.uk>
Date: Mon, 31 Jan 2005 17:06:43 +0000
Subject: [PATCH] Turn off threading support if glibc++ is single threaded.
 Enable threading support on HPUX for gcc >= 3.3.

[SVN r26967]
---
 include/boost/config/platform/hpux.hpp     | 12 +++++++++---
 include/boost/config/stdlib/libstdcpp3.hpp |  3 +++
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/include/boost/config/platform/hpux.hpp b/include/boost/config/platform/hpux.hpp
index 21049059..fa773aa7 100644
--- a/include/boost/config/platform/hpux.hpp
+++ b/include/boost/config/platform/hpux.hpp
@@ -21,9 +21,15 @@
 #define BOOST_NO_SWPRINTF 
 #define BOOST_NO_CWCTYPE
 
-#ifdef __GNUC__
-   // GNU C on HP-UX does not support threads (checked up to gcc 3.3)
-#  define BOOST_DISABLE_THREADS
+#if defined(__GNUC__)
+#  if (__GNUC__ < 3) || ((__GNUC__ == 3) && (__GNUC_MINOR__ < 3))
+      // GNU C on HP-UX does not support threads (checked up to gcc 3.3)
+#     define BOOST_DISABLE_THREADS
+#  elif !defined(BOOST_DISABLE_THREADS)
+      // threads supported from gcc-3.3 onwards:
+#     define BOOST_HAS_THREADS
+#     define BOOST_HAS_PTHREADS
+#  endif
 #endif
 
 // boilerplate code:
diff --git a/include/boost/config/stdlib/libstdcpp3.hpp b/include/boost/config/stdlib/libstdcpp3.hpp
index 9774e876..8669dbd0 100644
--- a/include/boost/config/stdlib/libstdcpp3.hpp
+++ b/include/boost/config/stdlib/libstdcpp3.hpp
@@ -39,6 +39,9 @@
 #  else
 #     define BOOST_DISABLE_THREADS
 #  endif
+#elif defined(__GLIBCPP__) && !defined(_GLIBCPP_HAVE_GTHR_DEFAULT)
+   // disable thread support if the std lib was built single threaded:
+#  define BOOST_DISABLE_THREADS
 #endif