文件操作 - ax_cxx_extern_template.m4
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文件: /usr/share/aclocal/ax_cxx_extern_template.m4
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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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