CVS log for src/tests/libexec/ld.elf_so/t_dlinfo.c

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t_dlinfo, t_rtld_r_debug: Audit ATF_REQUIRE/CHECK, sprinkle messages.

Make sure to use ATF_REQUIRE when the subsequent code doesn't work if
the check fails.

rtld tests: Don't use RZ for dlinfo.

Use

	ATF_REQUIRE_EQ_MSG(dlinfo(...), 0, "dlinfo: %s", dlerror())

instead, in order to accurately report the error on failure.  RZ is
only for functions like pthread_create(3) that return zero on success
and errno(3) code on failure, but dlinfo returns -1 on failure and
sets dlerror() to report the nature of the error.

Mostly merge changes from HEAD upto 20200411

return return atf_no_error() instead of 0 for consistency.

suggested by moritzbuhl in https://github.com/NetBSD/src/pull/11/

Sync with HEAD

Don't play with "../.." in includes for h_macros.h; deal with it centrally.
Minor fixes.

check that we can dlopen() the linkmap name, too

check that dlopen()d dso shows up in the linkmap

add Makefile.inc everywhere so that we can set WARNS=4 by default. Amazing
how many bugs this found :-)

add regression tests for dlinfo()