pg_bulkload 版本是3.1.16

linux CentOS release 6.5

# make USE_PGXS=1
make[1]: Entering directory `/soft/pg-soft/pg_bulkload-VERSION3_1_16/bin'
gcc -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement -Wendif-labels -Wmissing-format-attribute -Wformat-security -fno-strict-aliasing -fwrapv -g -O2 -DMAP_HUGETLB=0x40000 pg_bulkload.o recovery.o pgut/pgut.o pgut/pgut-fe.o pgut/pgut-list.o -L/opt/pgbinary/pgsql/lib -L/opt/local/Current/lib -Wl,--as-needed -Wl,-rpath,'/opt/pgbinary/pgsql/lib',--enable-new-dtags -Wl,--build-id -L/opt/pgbinary/pgsql/lib -lpq -lpgcommon -lpgport -lpam -lssl -lcrypto -lgssapi_krb5 -lz -ledit -lrt -lcrypt -ldl -lm -o pg_bulkload
/usr/bin/ld: cannot find -lpam
collect2: ld 返回 1
make[1]: *** [pg_bulkload] 错误 1
make[1]: Leaving directory `/soft/pg-soft/pg_bulkload-VERSION3_1_16/bin'
make: *** [all] 错误 2

请问如何解决？？