Cant compile7.4.3

hi,mike g, i compiled pg 7.4.3 in MSYS with mingw3.3, and it can't be compiled, it seemed that the Makefile in the dir
of/src/backend is missed some line of codes. the "pg_sema.o" don't have the compile target 
thanks for your help!


make[4]: Entering directory `/home/cron/postgresql-7.4.2/src/backend/optimizer/util'
make[4]: `SUBSYS.o' is up to date.
make[4]: Leaving directory `/home/cron/postgresql-7.4.2/src/backend/optimizer/util'
make[3]: Leaving directory `/home/cron/postgresql-7.4.2/src/backend/optimizer'
make -C port all
make[3]: Entering directory `/home/cron/postgresql-7.4.2/src/backend/port'
gcc -O2 -fno-strict-aliasing -Wall -Wmissing-prototypes -Wmissing-declarations -I../../../src/include
-I./src/include/port/win32 "-I../../../src/include/port/win32" -DBUILDING_DLL  -c -o dynloader.o dynloader.c 
make[3]: *** No rule to make target `pg_sema.o', needed by `SUBSYS.o'.  Stop.
make[3]: Leaving directory `/home/cron/postgresql-7.4.2/src/backend/port'
make[2]: *** [port-recursive] Error 2
make[2]: Leaving directory `/home/cron/postgresql-7.4.2/src/backend'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/cron/postgresql-7.4.2/src'
make: *** [all] Error 2