on my ubuntu 9.04 box, I can't build pam_smbpass from v3-4-test:

Compiling pam_smbpass/support.c
pam_smbpass/support.c: In function ‘_log_err’:
pam_smbpass/support.c:72: error: implicit declaration of function ‘pam_vsyslog’
The following command failed:
ccache gcc -g -ggdb -Wc++-compat -Wcomment -Wpointer-arith -Wcast-align -Wwrite-strings -Wstrict-prototypes -Wstrict-aliasing -Wmissing-prototypes -Wmissing-declarations -Wshadow -Wdeclaration-after-statement -D_FORTY_SOURCE=2 -fmessage-length=0 -g -g -Wall -Wshadow -Wpointer-arith -Wcast-align -Wwrite-strings -DDEBUG_PASSWORD -DDEVELOPER -Wdeclaration-after-statement -Werror-implicit-function-declaration -I. -I/home/obnox/devel/samba/3.4/v3-4-test/source3 -I/home/obnox/devel/samba/3.4/v3-4-test/source3/iniparser/src -Iinclude -I./include  -I. -I. -I./../lib/replace -I./../lib/talloc -I./../lib/tevent -I./../lib/tdb/include -I./libaddns -I./librpc -I./.. -I/home/obnox/devel/samba/ctdb.git/include -DHAVE_CONFIG_H  -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Iinclude -I./include -I. -I. -I./../lib/replace -I./../lib/talloc -I./../lib/tevent -I./../lib/tdb/include -I./libaddns -I./librpc -I./.. -I./../lib/popt -DLDAP_DEPRECATED  -I/home/obnox/devel/samba/3.4/v3-4-test/source3/lib -I.. -I../source4 -D_SAMBA_BUILD_=3 -D_SAMBA_BUILD_=3 -fPIC -c pam_smbpass/support.c -o pam_smbpass/support.o

The use of pam_vsyslog was introduced in commit 5c34ea94bdf9e3efb6743e52dd3c0c0088cff7d8
("s3:pam_smbpass: don't call openlog() or closelog() from pam_smbpass")

Michael