/lib64/libdmraid.so.1.0.0.rc16 in dmraid-1.0.0.rc16-37.fc28.x86_64 is not linked with the standard Fedora linker flags (LDFLAGS) from redhat-rpm-config:

gcc -shared -Wl,-soname,libdmraid.so.1 \
-Wl,--version-script,.export.sym activate/activate.o activate/devmapper.o device/ata.o device/partition.o device/scan.o device/scsi.o display/display.o format/format.o locking/locking.o log/log.o metadata/log_ops.o metadata/metadata.o metadata/reconfig.o misc/file.o misc/init.o misc/lib_context.o misc/misc.o misc/workaround.o mm/dbg_malloc.o format/ataraid/asr.o format/ataraid/hpt37x.o format/ataraid/hpt45x.o format/ataraid/isw.o format/ataraid/jm.o format/ataraid/lsi.o format/ataraid/nv.o format/ataraid/pdc.o format/ataraid/sil.o format/ataraid/via.o format/ddf/ddf1.o format/ddf/ddf1_lib.o format/ddf/ddf1_crc.o format/ddf/ddf1_cvt.o format/ddf/ddf1_dump.o 

Looks like LDFLAGS is missing completely, so this is probably a makefile bug in the package.

See https://src.fedoraproject.org/rpms/redhat-rpm-config/blob/master/f/buildflags.md for information on RPM macros and environment variables provided by the build environment.