| 1 | # rw_PROG_CXX_WORKS |
| 2 | # |
| 3 | # Check whether the C++ compiler works. There's a bit of oversight in |
| 4 | # autoconf that will set the C++ compiler to g++ if no compiler is found, |
| 5 | # even if g++ is not present! So we need an extra test to make sure that |
| 6 | # the compiler works. |
| 7 | # |
| 8 | AC_DEFUN([rw_PROG_CXX_WORKS], [ |
| 9 | AC_REQUIRE([AC_PROG_CXX]) |
| 10 | AC_CACHE_CHECK([whether the C++ compiler works], |
| 11 | [rw_cv_prog_cxx_works], |
| 12 | [AC_LANG_PUSH([C++]) |
| 13 | |
| 14 | AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [ |
| 15 | check_cxx_designated_initializers=yes |
| 16 | ], [ |
| 17 | rw_cv_prog_cxx_works=no |
| 18 | ]) |
| 19 | |
| 20 | AS_IF([test "x$check_cxx_designated_initializers" = "xyes"], [ |
| 21 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ |
| 22 | struct foo { int a; int b; }; |
| 23 | void fct(void) |
| 24 | { |
| 25 | struct foo f = { .a = 0, .b = 1 }; |
| 26 | } |
| 27 | ]])], [ |
| 28 | rw_cv_prog_cxx_works=yes |
| 29 | ], [ |
| 30 | rw_cv_prog_cxx_works=no |
| 31 | ]) |
| 32 | ]) |
| 33 | |
| 34 | AC_LANG_POP([C++]) |
| 35 | ]) |
| 36 | ]) |