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-snprintf-posix.c
tests/test-snprintf-posix.h
tests/test-snprintf.c
tests/minus-zero.h
tests/infinity.h
tests/nan.h
tests/signature.h
tests/macros.h

Depends-on:
stdint
float

configure.ac:
AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
AC_DEFINE([CHECK_SNPRINTF_POSIX], 1,
  [Define to 1 for strict checking in test-snprintf.c.])

Makefile.am:
TESTS += test-snprintf-posix test-snprintf
check_PROGRAMS += test-snprintf-posix test-snprintf