TL;DR: I did "make clean CONFIG_INTERNAL=no" and it looks like it built successfully! Here's the email as I assembled it before doing the "make clean":
I've attached the output files you asked for to this message.
I tried to build using "make CONFIG_INTERNAL=no" early on but this was the error output:
cli_classic.o: In function `main':
cli_classic.c:(.text.startup+0xaac): undefined reference to `force_boardmismatch'
print.o: In function `print_supported_boards_helper':
print.c:(.text+0x245): undefined reference to `board_matches'
print.o: In function `print_supported':
print.c:(.text+0xf11): undefined reference to `chipset_enables'
print.c:(.text+0xff3): undefined reference to `chipset_enables'
spi.o: In function `spi_get_valid_read_addr':
spi.c:(.text+0x12c): undefined reference to `ichspi_bbar'
collect2: error: ld returned 1 exit status
Makefile:1018: recipe for target 'flashrom' failed
make: *** [flashrom] Error 1