got this error while cross compiling:
checking whether setpgrp takes no argument... configure: error: cannot
check setpgrp when cross compiling
autoconf manual says:
— Macro: AC_FUNC_SETPGRP
If setpgrp takes no argument (the Posix version), define SETPGRP_VOID. Otherwise, it is the BSD version, which takes two process IDs as arguments. This macro does not check whether setpgrp exists at all; if you need to work in that situation, first call AC_CHECK_FUNC for setpgrp.
The result of this macro is cached in the ac_cv_func_setpgrp_void variable.
This macro is obsolescent, as current systems have a setpgrp whose signature conforms to Posix. New programs need not use this macro.
So override it with caching variable.
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