/usr/share/dune/aclocal/cxx0x_variadic.m4 is in libdune-common-dev 2.3.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | # tests for C++0x variadic template support
# the associated macro is called HAVE_VARIADIC_TEMPLATES
AC_DEFUN([VARIADIC_TEMPLATES_CHECK],[
AC_CACHE_CHECK([whether variadic templates are supported], dune_cv_variadic_templates_support, [
AC_REQUIRE([AC_PROG_CXX])
AC_REQUIRE([GXX0X])
AC_LANG_PUSH([C++])
AC_RUN_IFELSE([
AC_LANG_PROGRAM([#include<cassert>
template<typename... T>
int addints(T... x);
int add_ints()
{
return 0;
}
template<typename T1, typename... T>
int add_ints(T1 t1, T... t)
{
return t1 + add_ints(t...);
}],
[
assert( 5 == add_ints(9,3,-5,-2) );
return 0;
])],
dune_cv_variadic_templates_support=yes,
dune_cv_variadic_templates_support=no)
AC_LANG_POP
])
if test "x$dune_cv_variadic_templates_support" = xyes; then
AC_DEFINE(HAVE_VARIADIC_TEMPLATES, 1, [Define to 1 if variadic templates are supported])
fi
])
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