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# ===========================================================================
# http://autoconf-archive.cryp.to/ac_cxx_explicit_instantiations.html
# ===========================================================================
#
# SYNOPSIS
#
# AC_CXX_EXPLICIT_INSTANTIATIONS
#
# DESCRIPTION
#
# If the C++ compiler supports explicit instanciations 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.
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
])
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