From fa23e171f4d9390c1c4151355ec72f9ff6fc90ab Mon Sep 17 00:00:00 2001 From: Paul Eggert Date: Tue, 21 Jun 2011 09:15:07 -0700 Subject: Use gnulib's alloca-opt module. * .bzrignore: Add lib/alloca.h. * Makefile.in (GNULIB_MODULES): Add alloca-opt. * configure.in (AC_FUNC_ALLOCA): Remove almost all the alloca stuff, as gnulib now does that for us. Put alloca check after gl_INIT. * lib/gnulib.mk, m4/gl-comp.m4: Regenerate. * lib/alloca.in.h, m4/alloca.m4: New files, from gnulib. --- lib/alloca.in.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 lib/alloca.in.h (limited to 'lib/alloca.in.h') diff --git a/lib/alloca.in.h b/lib/alloca.in.h new file mode 100644 index 00000000000..5b69c6c81a8 --- /dev/null +++ b/lib/alloca.in.h @@ -0,0 +1,56 @@ +/* Memory allocation on the stack. + + Copyright (C) 1995, 1999, 2001-2004, 2006-2011 Free Software Foundation, + Inc. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + You should have received a copy of the GNU General Public + License along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, + USA. */ + +/* Avoid using the symbol _ALLOCA_H here, as Bison assumes _ALLOCA_H + means there is a real alloca function. */ +#ifndef _GL_ALLOCA_H +#define _GL_ALLOCA_H + +/* alloca (N) returns a pointer to N bytes of memory + allocated on the stack, which will last until the function returns. + Use of alloca should be avoided: + - inside arguments of function calls - undefined behaviour, + - in inline functions - the allocation may actually last until the + calling function returns, + - for huge N (say, N >= 65536) - you never know how large (or small) + the stack is, and when the stack cannot fulfill the memory allocation + request, the program just crashes. + */ + +#ifndef alloca +# ifdef __GNUC__ +# define alloca __builtin_alloca +# elif defined _AIX +# define alloca __alloca +# elif defined _MSC_VER +# include +# define alloca _alloca +# elif defined __DECC && defined __VMS +# define alloca __ALLOCA +# else +# include +# ifdef __cplusplus +extern "C" +# endif +void *alloca (size_t); +# endif +#endif + +#endif /* _GL_ALLOCA_H */ -- cgit v1.2.3