Trying to upgrade to Apache 2.0.49 and getting compile errors related to
mod_auth_pgsql:

make[1]: Entering directory `/usr/src/httpd-2.0.49'
/usr/src/httpd-2.0.49/srclib/apr/libtool --silent --mode=link gcc -pthread
-I/
=500 -D_BSD_SOURCE -D_SVID_SOURCE -D_GNU_SOURCE
-DAP_HAVE_DESIGNATED_INITIALIZER
I. -I/usr/src/httpd-2.0.49/os/unix
-I/usr/src/httpd-2.0.49/server/mpm/prefork -I
.49/modules/proxy -I/usr/src/httpd-2.0.49/include
-I/usr/src/httpd-2.0.49/module
-o httpd modules.lo modules/aaa/mod_access.la modules/aaa/mod_auth.la
modules
s/metadata/mod_env.la modules/metadata/mod_mime_magic.la
modules/metadata/mod_ex
_setenvif.la modules/ssl/mod_ssl.la modules/http/mod_http.la
modules/http/mod_mi
a modules/generators/mod_autoindex.la modules/generators/mod_asis.la
modules/gen
ers/mod_dir.la modules/mappers/mod_imap.la modules/mappers/mod_actions.la
module
ork/libprefork.la server/libmain.la os/unix/libos.la -lssl -lcrypto
/usr/src/htt
ldb-4.0 -lexpat -liconv /usr/src/httpd-2.0.49/srclib/apr/libapr-0.la -lrt
-lm -l
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x470): In
function
: undefined reference to `PQsetdbLogin'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x482): In
function
: undefined reference to `PQstatus'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x49a): In
function
: undefined reference to `PQreset'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x4aa): In
function
: undefined reference to `PQerrorMessage'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x4d2): In
function
: undefined reference to `PQstatus'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x4e6): In
function
: undefined reference to `PQerrorMessage'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x51d): In
function
: undefined reference to `PQexec'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x53c): In
function
: undefined reference to `PQerrorMessage'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x56e): In
function
: undefined reference to `PQresultStatus'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x580): In
function
: undefined reference to `PQclear'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x59a): In
function
: undefined reference to `PQresultStatus'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x5b5): In
function
: undefined reference to `PQerrorMessage'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x5db): In
function
: undefined reference to `PQclear'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x5f5): In
function
: undefined reference to `PQntuples'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x610): In
function
: undefined reference to `PQgetvalue'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x629): In
function
: undefined reference to `PQerrorMessage'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x64f): In
function
: undefined reference to `PQclear'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x6ad): In
function
: undefined reference to `PQclear'
modules/aaa/.libs/mod_auth_pgsql.al(mod_auth_pgsql.lo)(.text+0x6d5): In
function
: undefined reference to `PQclear'
collect2: ld returned 1 exit status
make[1]: *** [httpd] Error 1
make[1]: Leaving directory `/usr/src/httpd-2.0.49'
make: *** [all-recursive] Error 1

It still compiles fine with apache 2.0.48... I must be missing something,
because I don't see others having similar problems... My configure command
is as follows:

CFLAGS="-I/usr/kerberos/include -DSECURITY_HOLE_PASS_AUTHORIZATION"
./configure --prefix=/usr/apache2 --datadir=/www --enable-auth-digest
--enable-mime-magic --enable-expires --enable-headers --enable-usertrack
--enable-static-rotatelogs --enable-http --enable-dav --enable-dav-fs
-enable-cgi --enable-so --enable-ssl
--with-module=aaa:../mod_auth_pgsql-2.0.1/mod_auth_pgsql.c