Fix undefined behaviour. * lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to 'unsigned int', to avoid shift operations on 'int'. * lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size. * tests/test-count-leading-zeros.c (main): Use a random number that has as many bits as TYPE, not only 2*15 or 2*31 bits. * tests/test-count-trailing-zeros.c (main): Likewise. * tests/test-count-one-bits.c (main): Likewise. * tests/test-memmem.c: Don't include "null-ptr.h". (main): Use zerosize_ptr() instead of null_ptr(). * modules/memmem-tests (Files): Remove tests/null-ptr.h.

Files:
tests/test-net_if.c
tests/signature.h

Depends-on:

configure.ac:
NET_IF_LIB=
gl_saved_libs="$LIBS"
AC_SEARCH_LIBS([if_nameindex], [socket],
  [AC_DEFINE([HAVE_IF_NAMEINDEX], [1], [Define if you have if_nameindex.])
   if test "$ac_cv_search_if_nameindex" != "none required"; then
     NET_IF_LIB="$ac_cv_search_if_nameindex"
   fi])
LIBS="$gl_saved_libs"
AC_SUBST([NET_IF_LIB])

Makefile.am:
TESTS += test-net_if
check_PROGRAMS += test-net_if
test_net_if_LDADD = $(LDADD) @NET_IF_LIB@