dpkg-bootstrap-1.10.21-1221 config failed on Catalina 10.15.6

Hi, there,

I'm trying to install a new Fink on a MacBook Pro Late 2013 which I just upgraded from Mojave to Catalina. I've installed the new Xcode and command line tools, but when I run ./bootstrap, it quits after failing to configure dpkg-bootstrap-1.10.21-1221. The relevant output is below. Any suggestions will be greatly appreciated!

Package manager version: 0.45.1
Distribution version: selfupdate-point (bootstrap), 10.15, x86_64
Trees: local/main stable/main
Xcode.app: 12.0
Xcode command-line tools: 12.0.0.0.1.1599194153
Max. Fink build jobs:  8

...
	popd
/opt/sw/src/fink.build/dpkg-bootstrap-1.10.21-1221/dpkg-1.10.21
./configure --prefix=/opt/sw/bootstrap 	--build=x86_64-apple-darwin --without-zlib --without-dselect --without-start-stop-daemon --without-sgml-doc --with-admindir=/opt/sw/var/lib/dpkg --mandir=/opt/sw/bootstrap/share/man --infodir=/opt/sw/bootstrap/share/info --srcdir=/opt/sw/src/fink.build/dpkg-bootstrap-1.10.21-1221/dpkg-1.10.21 --without-libintl-prefix --without-libiconv-prefix --disable-nls
checking build system type... x86_64-apple-darwin
checking host system type... x86_64-apple-darwin
checking target system type... x86_64-apple-darwin
checking for gcc... gcc
checking for gcc... (cached) gcc
checking for C compiler default output file name... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables... 
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ANSI C... none needed
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking for ld... ld
checking for special C compiler options needed for large files... no
checking for _FILE_OFFSET_BITS value needed for large files... no
checking for _LARGE_FILES value needed for large files... no
checking whether make sets $(MAKE)... yes
checking dpkg version... 1.10.21
checking Operating system type... darwin
checking Debian architecture... darwin-x86_64
checking for a BSD-compatible install... /usr/bin/install -c
checking whether NLS is requested... no
checking for msgfmt... no
checking for gmsgfmt... :
checking for xgettext... no
checking for msgmerge... no
checking for ld used by GCC... ld
checking if the linker (ld) is GNU ld... no
checking for shared library run path origin... done
checking whether NLS is requested... no
checking whether to use NLS... no
checking for msgfmt... (cached) no
checking for gmsgfmt... (cached) :
checking for xgettext... (cached) no
checking for msgmerge... (cached) no
checking whether setlocale() is available... yes
checking how to run the C preprocessor... gcc -E
checking for egrep... grep -E
checking for ANSI C header files... no
checking for ranlib... ranlib
checking whether ln -s works... yes
checking for rm... rm -f
checking for sed... sed
checking for a BSD-compatible install... /usr/bin/install -c
checking for perl... /usr/bin/perl
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for mode_t... yes
checking for pid_t... yes
checking for size_t... yes
checking for vprintf... yes
checking for _doprnt... no
checking for an ANSI C-conforming const... yes
checking whether byte ordering is bigendian... no
checking for inline... inline
checking for unsigned long... yes
checking size of unsigned long... 8
checking for unsigned int... yes
checking size of unsigned int... 4
checking for ptrdiff_t... no
checking for unsetenv... yes
checking for alphasort... yes
checking for scandir... yes
checking for strerror... yes
checking for strsignal... yes
checking for strtoul... yes
checking for setsid... yes
checking for vsnprintf... yes
checking for lchown... yes
checking for snprintf... yes
checking sys/cdefs.h usability... yes
checking sys/cdefs.h presence... yes
checking for sys/cdefs.h... yes
checking syslog.h usability... yes
checking syslog.h presence... yes
checking for syslog.h... yes
checking stddef.h usability... no
checking stddef.h presence... yes
configure: WARNING: stddef.h: present but cannot be compiled
configure: WARNING: stddef.h:     check for missing prerequisite headers?
configure: WARNING: stddef.h: see the Autoconf documentation
configure: WARNING: stddef.h:     section "Present But Cannot Be Compiled"
configure: WARNING: stddef.h: proceeding with the preprocessor's result
configure: WARNING: stddef.h: in the future, the compiler will take precedence
configure: WARNING:     ## ------------------------------------------ ##
configure: WARNING:     ## Report this to the AC_PACKAGE_NAME lists.  ##
configure: WARNING:     ## ------------------------------------------ ##
checking for stddef.h... yes
checking error.h usability... no
checking error.h presence... no
checking for error.h... no
checking locale.h usability... yes
checking locale.h presence... yes
checking for locale.h... yes
checking whether sys_siglist is declared... yes
checking for ihash_create in -lihash... no
checking for proc_stat_list_create in -lps... no
checking for fmt_past_time in -lshouldbeinlibc... no
checking for kvm_openfiles in -lkvm... no
checking for initscr in -lncurses... yes
checking if TIOCNOTTY is defined in sys/ioctl.h... yes
checking for va_copy... no
checking for va_list assignment copy... configure: error: no
### execution of ./configure failed, exit code 1
phase compiling: dpkg-bootstrap-1.10.21-1221 failed



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