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- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_cxx_extern_template.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_CXX_EXTERN_TEMPLATE
- #
- # DESCRIPTION
- #
- # Test whether the C++ compiler supports "extern template".
- #
- # LICENSE
- #
- # Copyright (c) 2008 Patrick Mauritz <oxygene@studentenbude.ath.cx>
- #
- # 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 7
-
- AU_ALIAS([AC_CXX_EXTERN_TEMPLATE], [AX_CXX_EXTERN_TEMPLATE])
- AC_DEFUN([AX_CXX_EXTERN_TEMPLATE],[
- AC_CACHE_CHECK(whether the compiler supports extern template,
- ax_cv_cxx_extern_template,
- [AC_LANG_SAVE
- AC_LANG_CPLUSPLUS
- AC_TRY_COMPILE([template <typename T> void foo(T); extern template void foo<int>(int);],
- [],
- ax_cv_cxx_extern_template=yes, ax_cv_cxx_extern_template=no)
- AC_LANG_RESTORE
- ])
- if test "$ax_cv_cxx_extern_template" = yes; then
- AC_DEFINE(HAVE_EXTERN_TEMPLATE,,[define if the compiler supports extern template])
- fi
- ])
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