Failed compile PostgreSQL 7.1.2 on AIX 5.1

I am attempting to compile PostgreSQL 7.1.2 on an IBM B50 running AIX 5.1.
Running configure works fine but when I  go to the next step and run gmake
dies with the following error. If someone could point me in the direction of
what exactly is causing the error I would appreciate it greatly.

<!-- BEGIN Error Message -->
gmake[4]: Leaving directory
`/downloads/postgresql/postgresql-7.1.2/src/backend/
utils/time'
/usr/bin/ld -r -o SUBSYS.o fmgrtab.o adt/SUBSYS.o cache/SUBSYS.o
error/SUBSYS.o
fmgr/SUBSYS.o hash/SUBSYS.o init/SUBSYS.o misc/SUBSYS.o mmgr/SUBSYS.o
sort/SUBSY
S.o time/SUBSYS.o
gmake[3]: Leaving directory
`/downloads/postgresql/postgresql-7.1.2/src/backend/
utils'
gcc -O2 -pipe -Wall -Wmissing-prototypes -Wmissing-declarations
access/SUBSYS
.o bootstrap/SUBSYS.o catalog/SUBSYS.o parser/SUBSYS.o commands/SUBSYS.o
executo
r/SUBSYS.o lib/SUBSYS.o libpq/SUBSYS.o main/SUBSYS.o nodes/SUBSYS.o
optimizer/SU
BSYS.o port/SUBSYS.o postmaster/SUBSYS.o regex/SUBSYS.o rewrite/SUBSYS.o
storage
/SUBSYS.o tcop/SUBSYS.o
tils/SUBSYS.o -lz -lPW -lld -lnsl -ldl -lreadline  -o p
ostgres
ld: 0711-317 ERROR: Undefined symbol: .log
ld: 0711-317 ERROR: Undefined symbol: .ceil
ld: 0711-317 ERROR: Undefined symbol: .sqrt
ld: 0711-317 ERROR: Undefined symbol: .isnan
ld: 0711-317 ERROR: Undefined symbol: .floor
ld: 0711-317 ERROR: Undefined symbol: .pow
ld: 0711-317 ERROR: Undefined symbol: .exp
ld: 0711-317 ERROR: Undefined symbol: .log10
ld: 0711-317 ERROR: Undefined symbol: .acos
ld: 0711-317 ERROR: Undefined symbol: .asin
ld: 0711-317 ERROR: Undefined symbol: .atan
ld: 0711-317 ERROR: Undefined symbol: .atan2
ld: 0711-317 ERROR: Undefined symbol: .cos
ld: 0711-317 ERROR: Undefined symbol: .tan
ld: 0711-317 ERROR: Undefined symbol: .sin
ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more
information.
collect2: ld returned 8 exit status
gmake[2]: *** [postgres] Error 1
gmake[2]: Leaving directory
`/downloads/postgresql/postgresql-7.1.2/src/backend'
gmake[1]: *** [all] Error 2
gmake[1]: Leaving directory `/downloads/postgresql/postgresql-7.1.2/src'
gmake: *** [all] Error 2
<!-- END Error Message -->

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