can't find acap.h while building imapd-2.1.11

[Matt Selsky]

I'm trying to build imapd-2.1.11

I unpacked the source tarball into a direction and then I build from
another directory (since I have multiple architectures).  I configured
like this:

$ ../../src/configure \
        --prefix=/opt/cyrus-imapd-2.1.11 \
        --with-cyrus-prefix=/opt/cyrus-imap-2.1.11 \
        --with-cyrus-user=cyrusadm \
        --with-cyrus-group=mailer \
        --with-dbdir=/opt/BerkeleyDB.3.3 \
        --with-auth=unix \
        --enable-murder \
        --disable-sieve \
        --enable-fulldirhash \
        --with-openssl \
        --with-sasl=/opt/local

$ make
....
### Making all in 
/src/mail/cyrus/cyrus-imapd-2.1.11/obj/solaris9/acap
make[1]: Entering directory `/src/mail/cyrus/cyrus-imapd-2.1.11/obj/solaris9/acap'
gcc -c -I/opt/BerkeleyDB.3.3/include  -I/usr/local/include -I/opt/local/include -I. -I.. -I../lib -DHAVE_CONFIG_H -Wall -g -O2 \
../../../src/acap/acapsieve.c
../../../src/acap/acapsieve.c:20: acap.h: No such file or directory
make[1]: *** [acapsieve.o] Error 1
make[1]: Leaving directory 
`/src/mail/cyrus/cyrus-imapd-2.1.11/obj/solaris9/acap'
make: *** [all] Error 1


acap.h does exist in ../../../src/acap/acap.h  Should configure have 
added '$srcdir/.' to CPPFLAGS instead of '.' in the acap/Makefile?