config.log doesn't show INSTALL or srcdir

[LHB]

From my config.log:

ECHO_N='-n'
ECHO_T=''
EGREP='/bin/grep -E'
EXEEXT=''
GREP='/bin/grep'
INSTALL_DATA='${INSTALL} -m 644'
INSTALL_PROGRAM='${INSTALL}'
INSTALL_SCRIPT='${INSTALL}'
LDFLAGS=''
LEX='flex'
LEXLIB='-lfl'
LEX_OUTPUT_ROOT='lex.yy'
LIBOBJS=''

There are vars that depend on INSTALL listed, but INSTALL itself isn't 
listed.  However,  INSTALL  does get substituted, but it is not listed 
in config.log, which is a bummer for those of us who might cut and paste 
the variables to create a Makefile.in .  The same with srcdir:

psdir='${docdir}'
sbindir='${exec_prefix}/sbin'
sharedstatedir='${prefix}/com'
sysconfdir='${prefix}/etc'

I noticed that in a different bug report (ostensibly unrelated), 
somebody else was missing these vars in their config.log as well.
http://preview.tinyurl.com/3jcdg6q

So I am not alone.

Somewhere along the line, these vars managed to escape from being reported!

I did notice that config.status has a little section in it that has the 
missing vars all grouped together.  Coincidence?

:t
/@[a-zA-Z_][a-zA-Z_0-9]*@/!b
s|@configure_input@|$ac_sed_conf_input|;t t
s&@top_builddir@&$ac_top_builddir_sub&;t t
s&@top_build_prefix@&$ac_top_build_prefix&;t t
s&@srcdir@&$ac_srcdir&;t t
s&@abs_srcdir@&$ac_abs_srcdir&;t t
s&@top_srcdir@&$ac_top_srcdir&;t t
s&@abs_top_srcdir@&$ac_abs_top_srcdir&;t t
s&@builddir@&$ac_builddir&;t t
s&@abs_builddir@&$ac_abs_builddir&;t t
s&@abs_top_builddir@&$ac_abs_top_builddir&;t t
s&@INSTALL@&$ac_INSTALL&;t t
$ac_datarootdir_hack
"

All the best.

LHB Jr.