yann@1: Workaround for buglet in std::vector etc. when compiling
yann@1: with gcc-4.0.1 -Wall -O -fno-exceptions
yann@1: Fixes:
yann@1: 
yann@1: .../include/c++/4.0.0/bits/vector.tcc: In member function 'void std::vector<_Tp,
yann@1: _Alloc>::reserve(size_t) [with _Tp = int, _Alloc = std::allocator<int>]':
yann@1: .../include/c++/4.0.0/bits/vector.tcc:78: warning: control may reach end of
yann@1: non-void function 'typename _Alloc::pointer std::vector<_Tp,
yann@1: _Alloc>::_M_allocate_and_copy(size_t, _ForwardIterator, _ForwardIterator) [with
yann@1: _ForwardIterator = int*, _Tp = int, _Alloc = std::allocator<int>]' being inlined
yann@1: 
yann@1: See http://gcc.gnu.org/PR21951
yann@1: 
yann@1: To: gcc-patches at gcc dot gnu dot org
yann@1: Subject: [4.0.x] may reach end warning in system headers
yann@1: Message-Id: <20050701183024.E138714C16A9@geoffk5.apple.com>
yann@1: Date: Fri,  1 Jul 2005 11:30:24 -0700 (PDT)
yann@1: From: gkeating at apple dot com (Geoffrey Keating)
yann@1: 
yann@1: 
yann@1: One of our users was getting
yann@1: 
yann@1: /usr/include/gcc/darwin/4.0/c++/bits/stl_uninitialized.h:113: warning:
yann@1: control may reach end of non-void function '_ForwardIterator
yann@1: std::__uninitialized_copy_aux(_InputIterator, _InputIterator,
yann@1: _ForwardIterator, __false_type) [with _InputIterator =
yann@1: __gnu_cxx::__normal_iterator<TPoolAllocator::tAllocState*,
yann@1: std::vector<TPoolAllocator::tAllocState,
yann@1: std::allocator<TPoolAllocator::tAllocState> > >, _ForwardIterator =
yann@1: __gnu_cxx::__normal_iterator<TPoolAllocator::tAllocState*,
yann@1: std::vector<TPoolAllocator::tAllocState,
yann@1: std::allocator<TPoolAllocator::tAllocState> > >]' being inlined
yann@1: 
yann@1: which shouldn't be happening, he has no way to change a standard C++
yann@1: header.  The warning is bogus anyway, but it's fixed in 4.1 through
yann@1: the CFG changes, which I don't really want to backport to the 4.0
yann@1: branch, so instead I'll add this patch.  Other warnings generated from
yann@1: tree-inline.c check for DECL_SYSTEM_HEADER like this.
yann@1: 
yann@1: Bootstrapped & tested on powerpc-darwin8, I'll commit when the branch
yann@1: is unfrozen.
yann@1: 
yann@1: -- 
yann@1: - Geoffrey Keating <geoffk@apple.com>
yann@1: 
yann@1: ===File ~/patches/gcc-40-4121982.patch======================
yann@1: Index: ChangeLog
yann@1: 2005-06-28  Geoffrey Keating  <geoffk@apple.com>
yann@1: 
yann@1: 	* tree-inline.c (expand_call_inline): Prevent 'may reach end'
yann@1: 	warning in system headers.
yann@1: 
yann@1: Index: tree-inline.c
yann@1: ===================================================================
yann@1: RCS file: /cvs/gcc/gcc/gcc/tree-inline.c,v
yann@1: retrieving revision 1.170.8.4
yann@1: diff -u -p -u -p -r1.170.8.4 tree-inline.c
yann@1: --- gcc-4.0.1/gcc/tree-inline.c.old	6 Jun 2005 19:20:32 -0000	1.170.8.4
yann@1: +++ gcc-4.0.1/gcc/tree-inline.c	1 Jul 2005 18:27:26 -0000
yann@1: @@ -1693,7 +1693,8 @@ expand_call_inline (tree *tp, int *walk_
yann@1:  	&& !TREE_NO_WARNING (fn)
yann@1:  	&& !VOID_TYPE_P (TREE_TYPE (TREE_TYPE (fn)))
yann@1:  	&& return_slot_addr == NULL_TREE
yann@1: -	&& block_may_fallthru (copy))
yann@1: +	&& block_may_fallthru (copy)
yann@1: +	&& !DECL_IN_SYSTEM_HEADER (fn))
yann@1:        {
yann@1:  	warning ("control may reach end of non-void function %qD being inlined",
yann@1:  		 fn);
yann@1: ============================================================
yann@1: