The newly-introduced libctf-lookup unnamed-field-info test checks
C compiler-observed field offsets against libctf-computed ones
by #including the testcase in the lookup runner as well as
generating CTF for it. This only works if the host, on which
the lookup runner is compiled and executed, is the same architecture as
the target, for which the CTF is generated: when crossing, the trick
may fail.
So pass down an indication of whether this is a cross into the
testsuite, and add a new no_cross flag to .lk files that is used to
suppress test execution when a cross-compiler is being tested.
libctf/
* Makefile.am (check_DEJAGNU): Pass down TEST_CROSS.
* Makefile.in: Regenerated.
* testsuite/lib/ctf-lib.exp (run_lookup_test): Use it to
implement the new no_cross option.
* testsuite/libctf-lookup/unnamed-field-info.lk: Mark as
no_cross.
We were failing to add the offsets of the containing struct/union
in this case, leading to all offsets being relative to the unnamed
struct/union itself.
libctf/
PR libctf/30264
* ctf-types.c (ctf_member_info): Add the offset of the unnamed
member of the current struct as necessary.
* testsuite/libctf-lookup/unnamed-field-info*: New test.
