Unable to build sieve plugin

[Mark Foley]

I'm wanting to experiment with sieve processing for the first time. Having some trouble getting
started. I googled to page, https://wiki2.dovecot.org/Pigeonhole/Sieve, went to the "Download
and Installation" link, then the "Pigeonhole download page" link and downloaded
dovecot-2.2-pigeonhole-0.4.21.tar.gz (I have Dovecot version 2.2.15). I untarred, ran
./configure (which appeared to run OK), then `make` and got the following erro:

make[4]: Entering directory '/user/util/src/dovecot/dovecot-2.2-pigeonhole-0.4.21/src/lib-sieve/util'
/bin/sh ../../../libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I. -I../../..  -I/usr/local/include/dovecot   -DMODULEDIR=\""/usr/local/lib/dovecot"\"   -std=gnu99 -g -O2 -Wall -W -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wformat=2 -Wbad-function-cast -fno-builtin-strftime -Wstrict-aliasing=2  -I../../.. -MT edit-mail.lo -MD -MP -MF .deps/edit-mail.Tpo -c -o edit-mail.lo edit-mail.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I../../.. -I/usr/local/include/dovecot -DMODULEDIR=\"/usr/local/lib/dovecot\" -std=gnu99 -g -O2 -Wall -W -Wmissing-prototypes -Wmissing-declarations -Wpointer-arith -Wchar-subscripts -Wformat=2 -Wbad-function-cast -fno-builtin-strftime -Wstrict-aliasing=2 -I../../.. -MT edit-mail.lo -MD -MP -MF .deps/edit-mail.Tpo -c edit-mail.c  -fPIC -DPIC -o .libs/edit-mail.o
edit-mail.c: In function 'edit_mail_get_special':
edit-mail.c:1592:8: error: 'MAIL_FETCH_STORAGE_ID' undeclared (first use in this function)
   case MAIL_FETCH_STORAGE_ID:
        ^
edit-mail.c:1592:8: note: each undeclared identifier is reported only once for each function it appears in

This was followed by several more errors and the make failed.

What did I do wrong?

--Mark