kohr-h commented on issue #13096: [Scala] `make scalapkg` fails if MKL-DNN is used URL: https://github.com/apache/incubator-mxnet/issues/13096#issuecomment-435520719 Actually, while writing up this report, I kept fiddling around and managed to solve the problem. At least temporarily for myself. Here's what works: 1. Make the `Makefile` use environment `LDFLAGS`: ```bash $ git diff Makefile diff --git a/Makefile b/Makefile index b12311736..bc29c8705 100644 --- a/Makefile +++ b/Makefile @@ -90,7 +90,7 @@ else CFLAGS += -O3 -DNDEBUG=1 endif CFLAGS += -I$(TPARTYDIR)/mshadow/ -I$(TPARTYDIR)/dmlc-core/include -fPIC -I$(NNVM_PATH)/include -I$(DLPACK_PATH)/include -I$(TPARTYDIR)/tvm/include -Iinclude $(MSHADOW_CFLAGS) -LDFLAGS = -pthread $(MSHADOW_LDFLAGS) $(DMLC_LDFLAGS) +LDFLAGS += -pthread $(MSHADOW_LDFLAGS) $(DMLC_LDFLAGS) ifeq ($(ENABLE_TESTCOVERAGE), 1) CFLAGS += --coverage ``` I assume that the original version was intentional, maybe to be able to start from scratch. So the above patch may not be acceptable. 2. Set `LDFLAGS="-L$PWD/lib -lmkldnn" in the environment. At this stage, the error message changes. Instead of `undefined symbol`, we get ``` java.lang.UnsatisfiedLinkError: /home/hkohr/git/mxnet/scala-package/init-native/linux-x86_64/target/libmxnet-init-scala-linux-x86_64.so: libmkldnn.so.0: cannot open shared object file: No such file or directory ``` So we made it past the compilation phase but fail during linking because the linker doesn't find the shared library. 3. Adding also `LD_LIBRARY_PATH=$PWD/lib` finally makes the build succeed. Now I'm not sure if amending `LD_LIBRARY_PATH` is really a sustainable solution. The other dependencies get linked statically, so they don't have this issue. Maybe there's a way to also build a static version of MKL-DNN? Because then one could simply amend `LIB_DEP`.
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