| # no-c++.m4 serial 2 |
| dnl Copyright (C) 2006, 2009-2020 Free Software Foundation, Inc. |
| dnl This file is free software; the Free Software Foundation |
| dnl gives unlimited permission to copy and/or distribute it, |
| dnl with or without modifications, as long as this notice is preserved. |
| |
| # Support for C source files that cannot be compiled by a C++ compiler. |
| # Set NO_CXX to the C++ compiler flags needed to request C mode instead of |
| # C++ mode. |
| # So far only g++ is supported. This includes clang++, as it is g++ compatible. |
| |
| AC_DEFUN([gt_NO_CXX], |
| [ |
| NO_CXX= |
| AC_EGREP_CPP([Is_g_plus_plus], [ |
| #if defined __GNUC__ && defined __cplusplus |
| Is_g_plus_plus |
| #endif |
| ], |
| [NO_CXX="-x c"]) |
| AC_SUBST([NO_CXX]) |
| ]) |
