Add macros to gcc.hpp to support pathscale toolset.

Added an optimization to the -lx unix timeout code.  I
compute the amount of time the select call should sleep
until the "oldest" process times out.  This ensures that
all processes that timeout will be killed within one
second of their expiration.



[SVN r39534]

include/boost/config/compiler/gcc.hpp

@@ -43,6 +43,10 @@
 #   define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL
 #   define BOOST_NO_IS_ABSTRACT
 #elif __GNUC__ == 3
+#  if defined (__PATHSCALE__)
+#     define BOOST_NO_TWO_PHASE_NAME_LOOKUP
+#     define BOOST_NO_IS_ABSTRACT
+#  endif
    //
    // gcc-3.x problems:
    //