When casting between a pointer and an integer of a different size, GCC
emits a warning (which is escalated to a build failure by -Werror).
Indeed, if what you start with is a pointer, which you then cast to a
shorter integer and then back again, you're going to cut off some bits
of the pointer.

But if you start with an integer (such as mach_port_t), then cast it to
a longer pointer (void *), and then back to a shorter integer, you are
fine. To keep GCC happy, cast through an intermediary uintptr_t, which
is always the same size as a pointer.

Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230212111044.610942-4-bugaevc@gmail.com>

I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 7061 files FOO.

I then removed trailing white space from math/tgmath.h,
support/tst-support-open-dev-null-range.c, and
sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following
obscure pre-commit check failure diagnostics from Savannah.  I don't
know why I run into these diagnostics whereas others evidently do not.

remote: *** 912-#endif
remote: *** 913:
remote: *** 914-
remote: *** error: lines with trailing whitespace found
...
remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines

I used these shell commands:

../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright
(cd ../glibc && git commit -am"[this commit message]")

and then ignored the output, which consisted lines saying "FOO: warning:
copyright statement not found" for each of 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master

Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:

sed -ri '
  s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
  s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
  $(find $(git ls-files) -prune -type f \
      ! -name '*.po' \
      ! -name 'ChangeLog*' \
      ! -path COPYING ! -path COPYING.LIB \
      ! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
      ! -path manual/texinfo.tex ! -path scripts/config.guess \
      ! -path scripts/config.sub ! -path scripts/install-sh \
      ! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
      ! -path INSTALL ! -path  locale/programs/charmap-kw.h \
      ! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
      ! '(' -name configure \
            -execdir test -f configure.ac -o -f configure.in ';' ')' \
      ! '(' -name preconfigure \
            -execdir test -f preconfigure.ac ';' ')' \
      -print)

and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:

  chmod a+x sysdeps/unix/sysv/linux/riscv/configure
  # Omit irrelevant whitespace and comment-only changes,
  # perhaps from a slightly-different Autoconf version.
  git checkout -f \
    sysdeps/csky/configure \
    sysdeps/hppa/configure \
    sysdeps/riscv/configure \
    sysdeps/unix/sysv/linux/csky/configure
  # Omit changes that caused a pre-commit check to fail like this:
  # remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
  git checkout -f \
    sysdeps/powerpc/powerpc64/ppc-mcount.S \
    sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
  # Omit change that caused a pre-commit check to fail like this:
  # remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
  git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S

	* All files with FSF copyright notices: Update copyright dates
	using scripts/update-copyrights.
	* locale/programs/charmap-kw.h: Regenerated.
	* locale/programs/locfile-kw.h: Likewise.

	* hurd/hurdauth.c (_S_msg_add_auth): Call __vm_allocate and
	__vm_deallocate instead of vm_allocate and vm_deallocate.
	* hurd/hurdmsg.c (_S_msg_set_env_variable): Call __setenv instead of
	setenv.
	* hurd/hurdprio.c (_hurd_priority_which_map): Call __geteuid instead
	of geteuid.
	* hurd/path-lookup.c (file_name_path_scan): Call __strdup instead of
	strdup.
	* hurd/siginfo.c: Include <libioP.h>.
	(_hurd_siginfo_handler): Call _IO_puts instead of puts.
	* hurd/xattr.c (_hurd_xattr_get, _hurd_xattr_set): Call __munmap instead of
	munmap.
	* io/fts.c (fts_build): Call __dirfd instead of dirfd.
	* mach/devstream.c: Include <libioP.h>.
	(dealloc_ref): Call __mach_port_deallocate instead of
	mach_port_deallocate.
	(mach_open_devstream): Call _IO_fopencookie instead of fopencookie.
	Call __mach_port_deallocate instead of mach_port_deallocate.
	* stdlib/canonicalize.c (__realpath): Call __pathconf instead of
	pathconf.
	* sysdeps/mach/hurd/ifreq.c (__ifreq): Call __munmap instead of
	munmap.
	* sysdeps/mach/hurd/ifreq.h (__if_freereq): Likewise.
	* sysdeps/mach/hurd/ptrace.c (ptrace): Call __kill instead of kill.
	* sysdeps/mach/hurd/sendfile64.c (sendfile64): Call __munmap instead
	of munmap.
	* sysdeps/mach/hurd/socketpair.c (__socketpair): Call __close instead
	of close.
	* sysdeps/posix/clock_getres.c (realtime_getres): Call __sysconf
	instead of sysconf.
	* sysdeps/pthread/timer_gettime.c (timer_gettime): Call
	__clock_gettime instead of clock_gettime.
	* sysdeps/pthread/timer_routines.c (thread_func): Likewise.
	* sysdeps/pthread/timer_settime.c (timer_settime): Likewise.
	* sysdeps/unix/bsd/gtty.c (gtty): Call __ioctl instead of ioctl.
	* sysdeps/unix/bsd/stty.c (stty): Likewise.
	* sysdeps/unix/bsd/tcflow.c (tcflow): Call __tcgetattr instead of
	tcgetattr.
	* sysdeps/unix/clock_nanosleep.c (__clock_nanosleep): Call
	__clock_gettime and __nanosleep instead of clock_gettime and
	nanosleep.