Ticket History #2617: build failure on FreeBSD 4.9

FreeBSD 4.9-RELEASE (build and target)
gcc 2.95.4

configure issues several warnings, including
Could not find Tcl which is needed fro some tests
krb_db.h: present but cannot be compiled
krb_db.h: check for missing prerequisites headers?
krb_db.h: proceeding with the preprocessor's result

make issues warnings for nearly all successfully compiled files:
/usr/include/stdlib.h:111: warning: ANSI C does not support 'long long'
/usr/include/stdlib.h:117: warning: ANSI C does not support 'long long'
other make warnings include:
error.c:71: warning: no previous prototype for 'ss_error'
dk_decrypt.c:163: warning: pointer targets in assignment differ in signedness
(other, similar warnings in dk_encrypt.c, derive.c, ...)
stringtokey.c:79: warning: cast discards qualifiers from pointer target type
(many warnings in aes.c)
yarrow.c:448: warning: negative integer implicitly converted to unsigned type
(...)

The build eventually dies:
In file included from /usr/include/sys/param.h:98,
from ftp_var.h:111,
from ./cmdtab.c:39:
/usr/include/sys/signal.h:230: redefinition of 'my_sig_t'
ftp_var.h:62: 'my_sig_t' previously declared here
./cmdtab.c:35: warning: 'sccsid' defined but not used
*** Error code 1

Stop in /software/Kerberos/krb5-1.3.4/src/appl/gssftp/ftp.
<...>


I have captured the configure and make output using this shell script:
./configure -- prefix=/usr --enable-shared > config.stdout 2>&1
make > make.log 2>&1

Please advise if you would like to have me send either of these files
and/or the config.log file, or any other information needed to resolve this
problem.


I suspect configure made an erroneous assumption about the build
environment: This looks rather like the kinds of warnings and errors that
I see when trying to build winDoze programs with the wrong
compiler. However, I don't know enough about the gcc build process, etc.
to identify the underlying invalid assumption and correct it.