By any chance, do you happen to know offhand what this set of linker
errors could be coming from?

I'm still digging, but It's kinda strange: On two different machines (My
existing live server and a fairly fresh new VM instance), I have
the same OS (Debian 6), the exact same versions of vibe.d and mysqln,
the exact same main application file, the exact same DMD, exact same
libevent (2.0-5 from squeeze-backports), and I'm using the exact same
build command. And yet it works on my live server, but gives a bunch of
linker errors in the local VM machine. Darndest thing.

No need to go digging a bunch if you don't know offhand, I'm sure
there's something I've overlooked and I have very detailed notes on how
I set up my server. But I thought I'd ask just in case it was a pattern
you just happened to recognize:

/tmp/.rdmd-1000/rdmd-test10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test10.o:
In function
_D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection6__ctorMFPS4vibe4core7drivers13libevent2_tcp10TCPContextZC4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection6__ctorMFPS4vibe4core7drivers13libevent2_tcp10TCPContextZC4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection+0x1c):<br>undefined reference to<br>buffereventgetinput' ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers13libevent2tcp22Libevent2TCPConnection6ctorMFPS4vibe4core7drivers13libevent2_tcp10TCPContextZC4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection+0xc3):
undefined reference to
`evutil_inet_ntop' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection11readTimeoutMFNdS4core4time8DurationZv': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection11readTimeoutMFNdS4core4time8DurationZv+0x6a):
undefined reference to
`bufferevent_set_timeouts' ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection11readTimeoutMFNdS4core4time8DurationZv+0xbe):
undefined reference to
`bufferevent_set_timeouts' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection5closeMFZv': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection5closeMFZv+0xa1):
undefined reference to
`bufferevent_flush' ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection5closeMFZv+0xac):
undefined reference to
`bufferevent_flush' ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection5closeMFZv+0xd0):
undefined reference to
`bufferevent_get_output' ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection5closeMFZv+0xea):
undefined reference to
`evbuffer_get_length' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection9leastSizeMFNdZm': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection9leastSizeMFNdZm+0x4a):
undefined reference to
`evbuffer_get_length' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection20dataAvailableForReadMFNdZb': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection20dataAvailableForReadMFNdZb+0x3c):
undefined reference to
`evbuffer_get_length' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection4peekMFZAxh': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection4peekMFZAxh+0x4d):
undefined reference to
`evbuffer_peek' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection11waitForDataMFS4core4time8DurationZb': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection11waitForDataMFS4core4time8DurationZb+0x65):
undefined reference to
`event_new' ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection11waitForDataMFS4core4time8DurationZb+0x188):
undefined reference to
`event_free' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection5flushMFZv': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp22Libevent2TCPConnection5flushMFZv+0x5c):
undefined reference to
`bufferevent_flush' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers13libevent2_tcp19LibeventTCPListener13stopListeningMFZv': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp19LibeventTCPListener13stopListeningMFZv+0x86):
undefined reference to
`event_free' ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp19LibeventTCPListener13stopListeningMFZv+0x91):
undefined reference to
`evutil_closesocket' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers13libevent2_tcp9onConnectUNbisPvZv10ClientTask7executeMFZv': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers13libevent2_tcp9onConnectUNbisPvZv10ClientTask7executeMFZv+0x90):
undefined reference to
`bufferevent_socket_new' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`onSocketWrite': ../../vibe.d/source/vibe/core/log.d:(.text.onSocketWrite+0x7d):
undefined reference to
`bufferevent_flush' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers9libevent215Libevent2Driver6
ctorMFC4vibe4core6driver10DriverCoreZC4vibe4core7drivers9libevent215Libevent2Driver': ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent215Libevent2Driver6ctorMFC4vibe4core6driver10DriverCoreZC4vibe4core7drivers9libevent215Libevent2Driver+0x2b):
undefined reference to
`event
setmemfunctions' ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent215Libevent2Driver6ctorMFC4vibe4core6driver10DriverCoreZC4vibe4core7drivers9libevent215Libevent2Driver+0x79):
undefined reference to
`evthread
setlockcallbacks' ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent215Libevent2Driver6ctorMFC4vibe4core6driver10DriverCoreZC4vibe4core7drivers9libevent215Libevent2Driver+0xbc):
undefined reference to
`evthread
setconditioncallbacks' ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent215Libevent2Driver6ctorMFC4vibe4core6driver10DriverCoreZC4vibe4core7drivers9libevent215Libevent2Driver+0xc7):
undefined reference to
`evthread
setidcallback' ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent215Libevent2Driver6ctorMFC4vibe4core6driver10DriverCoreZC4vibe4core7drivers9libevent215Libevent2Driver+0x12a):
undefined reference to
`evthread
makebasenotifiable' ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent215Libevent2Driver6ctorMFC4vibe4core6driver10DriverCoreZC4vibe4core7drivers9libevent215Libevent2Driver+0x133):
undefined reference to
`evdns
basenew' /tmp/.rdmd-1000/rdmd-test10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test10.o:
In function
`
D4vibe4core7drivers9libevent215Libevent2Driver6dtorMFZv': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers9libevent215Libevent2Driver6dtorMFZv+0x16):
undefined reference to
evdns_base_free' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:<br>In function<br>D4vibe4core7drivers9libevent215Libevent2Driver11resolveHostMFAyatbZS4vibe4core3net14NetworkAddress': ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent215Libevent2Driver11resolveHostMFAyatbZS4vibe4core3net14NetworkAddress+0xe9):
undefined reference to
evutil_inet_pton' ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers9libevent215Libevent2Driver11resolveHostMFAyatbZS4vibe4core3net14NetworkAddress+0x1e3):<br>undefined reference to<br>evdnsbaseresolveipv4' ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent215Libevent2Driver11resolveHostMFAyatbZS4vibe4core3net14NetworkAddress+0x20b):
undefined reference to
evdns_base_resolve_ipv6' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:<br>In function<br>D4vibe4core7drivers9libevent215Libevent2Driver10connectTCPMFAyatZC4vibe4core3net13TCPConnection': ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent215Libevent2Driver10connectTCPMFAyatZC4vibe4core3net13TCPConnection+0xf3):
undefined reference to
bufferevent_socket_new' ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers9libevent215Libevent2Driver10connectTCPMFAyatZC4vibe4core3net13TCPConnection+0x1f8):<br>undefined reference to<br>buffereventsocketconnect' /tmp/.rdmd-1000/rdmd-test10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test10.o:
In function
_D4vibe4core7drivers9libevent215Libevent2Driver9listenTCPMFtDFC4vibe4core3net13TCPConnectionZvAyaE4vibe4core3net16TCPListenOptionsZC4vibe4core3net11TCPListener22setupConnectionHandlerFOC4vibe4core7drivers13libevent2_tcp19LibeventTCPListeneriS4vibe4core3net14NetworkAddressODFC4vibe4core3net13TCPConnectionZvZv': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers9libevent215Libevent2Driver9listenTCPMFtDFC4vibe4core3net13TCPConnectionZvAyaE4vibe4core3net16TCPListenOptionsZC4vibe4core3net11TCPListener22setupConnectionHandlerFOC4vibe4core7drivers13libevent2_tcp19LibeventTCPListeneriS4vibe4core3net14NetworkAddressODFC4vibe4core3net13TCPConnectionZvZv+0x51):<br>undefined reference to<br>eventnew' /tmp/.rdmd-1000/rdmd-test10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test10.o:
In function
`
D4vibe4core7drivers9libevent220Libevent2ManualEvent6dtorMFZv17foreachbody3072MFKS4vibe4core7drivers9libevent220Libevent2ManualEvent10ThreadSlotZi': ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent220Libevent2ManualEvent6dtorMFZv17foreachbody3072MFKS4vibe4core7drivers9libevent220Libevent2ManualEvent10ThreadSlotZi+0x15):
undefined reference to
`event
free' /tmp/.rdmd-1000/rdmd-test10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test10.o:
In function
_D4vibe4core7drivers9libevent220Libevent2ManualEvent7acquireMFZv': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers9libevent220Libevent2ManualEvent7acquireMFZv+0xa2):<br>undefined reference to<br>eventnew' /tmp/.rdmd-1000/rdmd-test10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test10.o:
In function
`
D4vibe4core7drivers9libevent214Libevent2Timer6ctorMFC4vibe4core7drivers9libevent215Libevent2DriverDFZvZC4vibe4core7drivers9libevent214Libevent2Timer': ../../vibe.d/source/vibe/core/log.d:(.text._D4vibe4core7drivers9libevent214Libevent2Timer6ctorMFC4vibe4core7drivers9libevent215Libevent2DriverDFZvZC4vibe4core7drivers9libevent214Libevent2Timer+0x34):
undefined reference to
event_new' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:<br>In function<br>D4vibe4core7drivers9libevent214Libevent2Timer6dtorMFZv': ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent214Libevent2Timer6dtorMFZv+0x20):
undefined reference to
`event_free' /tmp/.rdmd-1000/rdmd-test_10.d-B175BCE6948C0469C52048F3ABB2E6B5/objs/test_10.o:
In function
`_D4vibe4core7drivers9libevent222Libevent2UDPConnection6
ctorMFS4vibe4core3net14NetworkAddressC4vibe4core7drivers9libevent215Libevent2DriverZC4vibe4core7drivers9libevent222Libevent2UDPConnection': ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent222Libevent2UDPConnection6ctorMFS4vibe4core3net14NetworkAddressC4vibe4core7drivers9libevent215Libevent2DriverZC4vibe4core7drivers9libevent222Libevent2UDPConnection+0x66):
undefined reference to
`evutil
inetntop' ../../vibe.d/source/vibe/core/log.d:(.text.D4vibe4core7drivers9libevent222Libevent2UDPConnection6_ctorMFS4vibe4core3net14NetworkAddressC4vibe4core7drivers9libevent215Libevent2DriverZC4vibe4core7drivers9libevent222Libevent2UDPConnection+0x1de):
undefined reference to `event
new' collect2: ld returned 1 exit status