compile errors in new PL/Pler

gmake[3]: Entering directory `/space/1/home/chriskl/pgsql/src/pl/plperl'
gcc -O2 -fno-strict-aliasing -g -fpic -DPIC -I. 
-I/usr/libdata/perl/5.00503/mach/CORE -I../../../src/include   -c -o 
SPI.o SPI.c -MMD
SPI.xs: In function `XS__spi_exec_query':
SPI.xs:51: `aTHX_' undeclared (first use in this function)
SPI.xs:51: (Each undeclared identifier is reported only once
SPI.xs:51: for each function it appears in.)
SPI.xs:51: syntax error before string constant
gmake[3]: *** [SPI.o] Error 1
gmake[3]: Leaving directory `/space/1/home/chriskl/pgsql/src/pl/plperl'
gmake[2]: *** [all] Error 2
gmake[2]: Leaving directory `/space/1/home/chriskl/pgsql/src/pl'
gmake[1]: *** [all] Error 2
gmake[1]: Leaving directory `/space/1/home/chriskl/pgsql/src'
gmake: *** [all] Error 2

Chris