[committed] libstdc++: Silence -Wattributes warning in exception_ptr

[Jonathan Wakely]

Tested x86_64-linux. Pushed to trunk.

-- >8 --

libstdc++-v3/ChangeLog:

        * libsupc++/exception_ptr.h (__exception_ptr::_M_safe_bool_dummy):
        Remove __attribute__((const)) from function returning void.
---
 libstdc++-v3/libsupc++/exception_ptr.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/libstdc++-v3/libsupc++/exception_ptr.h 
b/libstdc++-v3/libsupc++/exception_ptr.h
index 7c234ce0bf2..ee977a8a6ea 100644
--- a/libstdc++-v3/libsupc++/exception_ptr.h
+++ b/libstdc++-v3/libsupc++/exception_ptr.h
@@ -151,8 +151,7 @@ namespace std _GLIBCXX_VISIBILITY(default)
 
 #ifdef _GLIBCXX_EH_PTR_COMPAT
       // Retained for compatibility with CXXABI_1.3.
-      void _M_safe_bool_dummy() _GLIBCXX_USE_NOEXCEPT
-       __attribute__ ((__const__));
+      void _M_safe_bool_dummy() _GLIBCXX_USE_NOEXCEPT;
       bool operator!() const _GLIBCXX_USE_NOEXCEPT
        __attribute__ ((__pure__));
       operator __safe_bool() const _GLIBCXX_USE_NOEXCEPT;
-- 
2.46.0