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.

Description:
Helper GNUmakefile with syntax checks, build improvements, etc.
See also readme-release.

Files:
top/maint.mk

Depends-on:
gnumakefile
useless-if-before-free
vc-list-files

configure.ac:
AC_CONFIG_COMMANDS_PRE([m4_ifdef([AH_HEADER],
  [AC_SUBST([CONFIG_INCLUDE], m4_defn([AH_HEADER]))])])
AC_REQUIRE([AC_PROG_SED])
AC_REQUIRE([AC_PROG_GREP])

Makefile.am:
EXTRA_DIST += $(top_srcdir)/maint.mk

License:
GPLed build tool

Maintainer:
all