Emacs Lisp warnings during make bootstrap

[Vinicius Jose Latorre <viniciusjl@ig.com.br>]

I've just done a make bootstrap and noticed the following Emacs Lisp 
warnings:


make bootstrap

[......]

Compiling /opt/work/emacs/lisp/./custom.el

In custom-theme-recalc-face:
custom.el:1179:8:Warning: face-spec-recalc called with 1 argument, but
    requires 2
Wrote /opt/work/emacs/lisp/custom.elc

[......]

Compiling /opt/work/emacs/lisp/./emulation/viper-init.el

In toplevel form:
viper-init.el:451:8:Warning: `make-variable-frame-local' is an obsolete
    function (as of Emacs 22.2); use a frame-parameter instead.
Wrote /opt/work/emacs/lisp/emulation/viper-init.elc

[......]

Compiling /opt/work/emacs/lisp/./gnus/gnus-sum.el

In end of data:
gnus-sum.el:12512:1:Warning: the following functions might not be defined at
    runtime: gnus-build-sparse-threads, gnus-dead-summary-mode,
    gnus-summary-mark-below
Wrote /opt/work/emacs/lisp/gnus/gnus-sum.elc

[......]

Compiling /opt/work/emacs/lisp/./obsolete/rnewspost.el
Package rnews is obsolete
Wrote /opt/work/emacs/lisp/obsolete/rnewspost.elc

[......]

Compiling /opt/work/emacs/lisp/./textmodes/tex-mode.el

In tex-mode:
tex-mode.el:910:8:Warning: function `tex-mode' defined multiple times in 
this
    file
Wrote /opt/work/emacs/lisp/textmodes/tex-mode.elc

[......]

Compiling /opt/work/emacs/lisp/./nxml/nxml-mode.el

In end of data:
nxml-mode.el:2628:1:Warning: the following functions are not known to be
    defined: rng-nxml-mode-init, nxml-enable-unicode-char-name-sets
Wrote /opt/work/emacs/lisp/nxml/nxml-mode.elc