Dmitry Eremin-Solenikov(lumag) replied on github web page:
test/m4/miscellaneous.m4
line 5
@@ -4,5 +4,11 @@
AC_ARG_ENABLE([test-cpp],
[AS_HELP_STRING([--disable-test-cpp], [run basic test aginast cpp])],
[test_cpp=$enableval],
- [test_cpp=yes])
+ [AC_LANG_PUSH([C++])
Comment:
Missing AC_PROG_CXX.
Also I think it's better to write it in the following way:
```autoconf
AC_ARG_ENABLE([.......],
[test_cpp=$enableval],
[test_cpp=check])
if test "x$test_cpp" != "xno" ; then
AC_PROG_CXX
AC_CACHE_CHECK([if C++ compiler works], [odp_cv_cxx_works],
[AC_COMPILE_IFELSE([....], [odp_cv_cxx_works=yes],
[odp_cv_cxx_works=no])])
# or you can rewrite this as two inline diffs
AS_IF([test "x$test_cpp$odp_cv_cxx_works" = "xyesno"],
[AC_MSG_FAILURE([...])],
[test "x$test_cpp$odp_cv_cxx_works" = "xcheckno"],
[AC_MSG_NOTICE([disabling C++ test])])
fi
```
https://github.com/Linaro/odp/pull/349#discussion_r157808329
updated_at 2017-12-19 16:39:58
