Macro: ac_cxx_explicit_instantiations

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Synopsis

  `AC_CXX_EXPLICIT_INSTANTIATIONS`

Version

  1.1.1.1 (2001/07/26) C++_Support @ ac-archive-0.5.39

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
      ])