dangen version 0.4-1 failed to build on amd64 with GCC-4.6/oneiric

dangen version 0.4-1 failed to build on amd64 with GCC-4.6/oneiric
Link to failed build: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2448106

Details about the rebuild:
https://lists.ubuntu.com/archives/ubuntu-devel/2011-April/033042.html

Direct link to the build log: https://launchpad.net/ubuntu/+archive/test-rebuild-20110413/+buildjob/2448106/+files/buildlog_ubuntu-natty-amd64.dangen_0.4-1_FAILEDTOBUILD.txt.gz

This log snippet might be of interest, since it triggered the matcher 'Purging chroot-autobuild'.
Excerpt 2090 lines into the build log:

/build/buildd/dangen-0.4/libtenm/tenm_timer.c:88: undefined reference to `SDL_Delay'
/build/buildd/dangen-0.4/libtenm/tenm_timer.c:89: undefined reference to `SDL_GetTicks'
/build/buildd/dangen-0.4/libtenm/tenm_timer.c:93: undefined reference to `SDL_GetTicks'
/build/buildd/dangen-0.4/libtenm/tenm_timer.c:95: undefined reference to `SDL_GetTicks'
libtenm/libtenm.a(tenm_timer.o): In function `tenm_calculate_fps':
/build/buildd/dangen-0.4/libtenm/tenm_timer.c:116: undefined reference to `SDL_GetTicks'
collect2: ld returned 1 exit status
make[3]: *** [dangen] Error 1
make[3]: Leaving directory `/build/buildd/dangen-0.4'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/build/buildd/dangen-0.4'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/build/buildd/dangen-0.4'
make: *** [build-stamp] Error 2
dpkg-buildpackage: error: debian/rules build gave error exit status 2
******************************************************************************
Build finished at 20110422-0033
FAILED [dpkg-buildpackage died]
Purging chroot-autobuild/build/buildd/dangen-0.4