fix image build error

Dockerfile

@@ -42,6 +42,7 @@ RUN apt-get -qq update \
 COPY --from=builder /go-ethereum/build/bin/geth /usr/local/bin/
 COPY --from=zkp-builder /app/target/release/libzkp.so /usr/local/lib/
 ENV LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib/
+ENV CGO_LDFLAGS="-ldl"
 
 EXPOSE 8545 8546 30303 30303/udp
 ENTRYPOINT ["geth"]

Dockerfile.mockccc

@@ -20,6 +20,8 @@ FROM ubuntu:20.04
 RUN apt-get -qq update \
     && apt-get -qq install -y --no-install-recommends ca-certificates
 
+ENV CGO_LDFLAGS="-ldl"
+
 COPY --from=builder /go-ethereum/build/bin/geth /usr/local/bin/
 
 EXPOSE 8545 8546 30303 30303/udp

build/ci.go

@@ -228,6 +228,9 @@ func doInstall(cmdline []string) {
 	// Show packages during build.
 	gobuild.Args = append(gobuild.Args, "-v")
 
+	// Add -ldl flags for libscroll_zstd.a.
+	gobuild.Args = append(gobuild.Args, "-ldflags", "-extldflags -ldl")
+
 	// Now we choose what we're even building.
 	// Default: collect all 'main' packages in cmd/ and build those.
 	packages := flag.Args()