warning on intel macs 10.5

gcc -DHAVE_CONFIG_H -I. -I../.. -DG_LOG_DOMAIN=\"gnc.engine\" -I/usr/X11R6/include -I/sw/lib/system-openssl/include -I/sw/include -I../../lib/libc -I../../src/core-utils -I../../src -I../../src -I../../src/gnc-module -I../../lib/libqof/qof -I../../lib/libqof/qof -I/sw/include/glib-2.0 -I/sw/lib/glib-2.0/include -I/sw/include -Werror -Wdeclaration-after-statement -Wno-pointer-sign -D_FORTIFY_SOURCE=2 -g -O2 -Wall -Wunused -Wmissing-prototypes -Wmissing-declarations -Wno-unused -c Transaction.c  -fno-common -DPIC -o .libs/Transaction.o
cc1: warnings being treated as errors
SplitP.h:152: warning: 'mark_split' used but never defined
make[5]: *** [Transaction.lo] Error 1