Mercurial > hg > octave-kai > gnulib-hg
changeset 10247:03122e4acd36
Don't test whether compound literals can be used as initializers.
author | Andreas Schwab <schwab@suse.de> |
---|---|
date | Wed, 25 Jun 2008 00:59:18 +0200 |
parents | 50a9076d476d |
children | dde1ecc647d1 |
files | ChangeLog m4/getdate.m4 |
diffstat | 2 files changed, 14 insertions(+), 3 deletions(-) [+] |
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--- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2008-06-24 Andreas Schwab <schwab@suse.de> + + * m4/getdate.m4 (gl_C_COMPOUND_LITERALS): Don't test whether compound + literals can be used as initializers for global variables. + 2008-06-23 Eric Blake <ebb9@byu.net> Make gnulib-cache.m4 easier to diff.
--- a/m4/getdate.m4 +++ b/m4/getdate.m4 @@ -1,13 +1,19 @@ -# getdate.m4 serial 12 -dnl Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. +# getdate.m4 serial 13 +dnl Copyright (C) 2002-2006, 2008 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. +dnl Define HAVE_COMPOUND_LITERALS if the C compiler supports compound literals +dnl as in ISO C99. +dnl Note that compound literals such as (struct s) { 3, 4 } can be used for +dnl initialization of stack-allocated variables, but are not constant +dnl expressions and therefore cannot be used as initializer for global or +dnl static variables (even though gcc supports this in pre-C99 mode). AC_DEFUN([gl_C_COMPOUND_LITERALS], [ AC_CACHE_CHECK([for compound literals], gl_cv_compound_literals, - [AC_TRY_COMPILE([struct s { int i, j; }; struct s s = (struct s) { 1, 2 };], + [AC_TRY_COMPILE([struct s { int i, j; };], [struct s t = (struct s) { 3, 4 }; if (t.i != 0) return 0;], gl_cv_compound_literals=yes,