Comment 1 for bug 284910

I have the same error in a pbuilbder build:
libtool: link: g++ -Wl,-Bsymbolic-functions -fPIC -DPIC -I/usr/include -Wl,-Bsymbolic-functions -g -O2 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -rdynamic gdal_wrap.o -o .libs/gdal.so -L/usr/lib -lc -L/usr/lib/mysql -lm -L/tmp/buildd/gdal-1.5.2 /tmp/buildd/gdal-1.5.2/.libs/libgdal1.5.0.so /usr/lib/libgeos_c.so /usr/lib/libgeos.so /usr/lib/libsqlite3.so /usr/lib/libodbc.so /usr/lib/libodbcinst.so /usr/lib/libltdl.so /usr/lib/libexpat.so -lxerces-c /usr/lib/libjasper.so /usr/lib/libhdf5.so -lmfhdf -ldf -logdi /usr/lib/libgif.so /usr/lib/libtiff.so /usr/lib/libjpeg.so -lpng -lnetcdf -lpq -ldl /usr/lib/libcurl-gnutls.so /usr/lib/libidn.so -lldap -lrt -lkrb5 -lk5crypto -lcom_err -lgssapi_krb5 /usr/lib/libgnutls.so /usr/lib/libtasn1.so /lib/libgcrypt.so /usr/lib/libmysqlclient.so -lpthread -lcrypt -lnsl -lz -lruby1.8
/usr/lib/gcc/x86_64-linux-gnu/4.3.2/../../../../lib/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: ld returned 1 exit status
make[2]: *** [gdal.so] Error 1
make[2]: Leaving directory `/tmp/buildd/gdal-1.5.2/swig/ruby'