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- # ===================================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_cxx_explicit_instantiations.html
- # ===================================================================================
- #
- # SYNOPSIS
- #
- # AX_CXX_EXPLICIT_INSTANTIATIONS
- #
- # DESCRIPTION
- #
- # If the C++ compiler supports explicit instantiations syntax, define
- # HAVE_INSTANTIATIONS.
- #
- # LICENSE
- #
- # Copyright (c) 2008 Todd Veldhuizen
- # Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org>
- #
- # Copying and distribution of this file, with or without modification, are
- # permitted in any medium without royalty provided the copyright notice
- # and this notice are preserved. This file is offered as-is, without any
- # warranty.
-
- #serial 9
-
- AU_ALIAS([AC_CXX_EXPLICIT_INSTANTIATIONS], [AX_CXX_EXPLICIT_INSTANTIATIONS])
- AC_DEFUN([AX_CXX_EXPLICIT_INSTANTIATIONS],
- [AC_CACHE_CHECK(whether the compiler supports explicit instantiations,
- ax_cv_cxx_explinst,
- [AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- AC_TRY_COMPILE([template <class T> class A { T t; }; template class A<int>;],
- [], ax_cv_cxx_explinst=yes, ax_cv_cxx_explinst=no)
- AC_LANG_RESTORE
- ])
- if test "$ax_cv_cxx_explinst" = yes; then
- AC_DEFINE(HAVE_INSTANTIATIONS,,
- [define if the compiler supports explicit instantiations])
- fi
- ])
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