Macro: ac_cxx_explicit_instantiations

Back to the Main Page. | Download the M4 Source.

# ac_cxx_explicit_instantiations

## Synopsis

`AC_CXX_EXPLICIT_INSTANTIATIONS`

## Version

1.1.1.1 (2001/07/26) C++_Support @ ac-archive-0.5.32

## Author

Luc Maisonobe

## Description

If the C++ compiler supports explicit instanciations syntax, define HAVE_INSTANTIATIONS.

## M4 Source Code

    AC_DEFUN([AC_CXX_EXPLICIT_INSTANTIATIONS],
    [AC_CACHE_CHECK(whether the compiler supports explicit instantiations,
    ac_cv_cxx_explinst,
    [AC_LANG_SAVE
     AC_LANG_CPLUSPLUS
     AC_TRY_COMPILE([template <class T> class A { T t; }; template class A<int>;],
     [], ac_cv_cxx_explinst=yes, ac_cv_cxx_explinst=no)
     AC_LANG_RESTORE
    ])
    if test "$ac_cv_cxx_explinst" = yes; then
      AC_DEFINE(HAVE_INSTANTIATIONS,,
                [define if the compiler supports explicit instantiations])
    fi
    ])