* guix/build/gremlin.scm (&elf-error, &invalid-segment-size): New error condition types. (dynamic-link-segment): Compare SEGMENT's offset + size to ELF's total size. (validate-needed-in-runpath): Wrap body in 'guard' form.
* guix/build/gremlin.scm (%libc-libraries): Add "libnsl.so".
* guix/build/gremlin.scm, tests/gremlin.scm: New files. * Makefile.am (MODULES): Add guix/build/gremlin.scm. (SCM_TESTS): Add tests/gremlin.scm.