[Libguestfs] [PATCH 4/4] ruby: Move checks from autoconf to mkmf; add extra check for rb_alloc_func_t

[Richard W.M. Jones]

FYI when I tried this patch, I got the following compile error.
However possibly I didn't 'make clean' before compiling ...

_guestfs.c: In function 'rb_hash_lookup':
_guestfs.c:76:30: error: 'struct RHash' has no member named 'tbl'
_guestfs.c:76:19: error: passing argument 3 of 'st_lookup' discards 'volatile' qualifier from pointer target type [-Werror]
In file included from /usr/include/ruby/intern.h:34:0,
                 from /usr/include/ruby/ruby.h:1382,
                 from /usr/include/ruby.h:32,
                 from _guestfs.c:31:
/usr/include/ruby/st.h:114:5: note: expected 'st_data_t *' but argument is of type 'volatile VALUE *'
cc1: all warnings being treated as errors

Rich.

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