This file is indexed.

/usr/share/dune/aclocal/cxx11_constexpr.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
# tests for C++11 constexpr support
# the associated macro is called HAVE_CONSTEXPR

AC_DEFUN([CXX11_CONSTEXPR_CHECK],[
  AC_CACHE_CHECK([for C++11 constexpr], dune_cv_cxx11_constexpr_support, [
    AC_REQUIRE([AC_PROG_CXX])
    AC_REQUIRE([GXX0X])
    AC_LANG_PUSH([C++])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([
          constexpr int foo () { return 0; }

          template< int v >
          struct A
          {
            static const int value = v;
          };
        ],[
          return A< foo() >::value;
        ])],
      dune_cv_cxx11_constexpr_support=yes,
      dune_cv_cxx11_constexpr_support=no)
    AC_LANG_POP
  ])
  if test "x$dune_cv_cxx11_constexpr_support" = xyes; then
    AC_DEFINE(HAVE_CONSTEXPR, 1, [Define to 1 if C++11 constexpr is supported])
  fi
])