simgear build fails

[Scott I. Remick]

On a FreeBSD 5.3R system, I am unable to upgrade from simgear 0.3.5 to
0.3.7:

c++  -O -pipe  -L/usr/local/lib -L/usr/X11R6/lib  -o openal_test1 
openal_test1.o ../../simgear/debug/libsgdebug.a  -lm
openal_test1.o(.text+0x943): In function `main':
: undefined reference to `alutInit'
openal_test1.o(.text+0x948): In function `main':
: undefined reference to `alGetError'
openal_test1.o(.text+0x94d): In function `main':
: undefined reference to `alGetError'
openal_test1.o(.text+0xaf1): In function `main':
: undefined reference to `alListenerfv'
openal_test1.o(.text+0xb02): In function `main':
: undefined reference to `alListenerfv'
openal_test1.o(.text+0xb13): In function `main':
: undefined reference to `alListenerfv'
openal_test1.o(.text+0xb36): In function `main':
: undefined reference to `alGenBuffers'
openal_test1.o(.text+0xb3b): In function `main':
: undefined reference to `alGetError'
openal_test1.o(.text+0xe75): In function `main':
: undefined reference to `alutLoadWAVFile'
openal_test1.o(.text+0xe7d): In function `main':
: undefined reference to `alGetError'
openal_test1.o(.text+0x101f): In function `main':
: undefined reference to `alBufferData'
openal_test1.o(.text+0x1027): In function `main':
: undefined reference to `alGetError'
openal_test1.o(.text+0x11be): In function `main':
: undefined reference to `alutUnloadWAV'
openal_test1.o(.text+0x11cf): In function `main':
: undefined reference to `alGenSources'
openal_test1.o(.text+0x11d4): In function `main':
: undefined reference to `alGetError'
openal_test1.o(.text+0x1201): In function `main':
: undefined reference to `alSourcei'
openal_test1.o(.text+0x121a): In function `main':
: undefined reference to `alSourcef'
openal_test1.o(.text+0x122e): In function `main':
: undefined reference to `alSourcef'
openal_test1.o(.text+0x1245): In function `main':
: undefined reference to `alSourcefv'
openal_test1.o(.text+0x125c): In function `main':
: undefined reference to `alSourcefv'
openal_test1.o(.text+0x1277): In function `main':
: undefined reference to `alSourcei'
openal_test1.o(.text+0x1285): In function `main':
: undefined reference to `alSourcePlay'
*** Error code 1

Stop in /usr/ports/devel/simgear/work/SimGear-0.3.7/simgear/sound.
*** Error code 1

Stop in /usr/ports/devel/simgear/work/SimGear-0.3.7/simgear.
*** Error code 1

Stop in /usr/ports/devel/simgear/work/SimGear-0.3.7/simgear.
*** Error code 1

Stop in /usr/ports/devel/simgear/work/SimGear-0.3.7.
*** Error code 1

Stop in /usr/ports/devel/simgear.
** Command failed [exit code 1]: /usr/bin/script -qa /tmp/portupgrade33872.9
make
** Fix the problem and try again.
** Listing the failed packages (*:skipped / !:failed)
        ! devel/simgear (SimGear-0.3.5) (bad C++ code)
--->  Packages processed: 0 done, 9 ignored, 0 skipped and 1 failed