ImportError with import hashlib.py

I get this error when running the examples: Traceback (most recent call last): File "/home/d.baburin/work/cocotb/cocotb/__init__.py", line 37, in <module> import random File "/usr/lib64/python2.7/random.py", line 49, in <module> import hashlib as _hashlib File "/usr/lib64/python2.7/hashlib.py", line 116, in <module> import _hashlib ImportError: /usr/lib64/libssl.so.10: symbol private_ossl_minimum_dh_bits, version libcrypto.so.10 not defined in file libcrypto.so.10 with link time reference Failed to load "cocotb" ` I have Centos 7 and Cadence Xcelium simulator (new version of Cadence IUS).

As far as I understand it requires earlier version for openssl. My version 1.0.2k and in /lib64/ libssl.so.10 and libcrypto.so.10 symlinks links on 1.0.2k version files. When I change simlinks on previous version - 0.9.8e, I got next error( but simulation was started): Traceback (most recent call last): File "/usr/libexec/abrt-action-ureport", line 11, in <module> import augeas File "/usr/lib/python2.7/site-packages/augeas.py", line 43, in <module> import ctypes.util File "/usr/lib64/python2.7/ctypes/util.py", line 89, in <module> import re, tempfile, errno File "/usr/lib64/python2.7/tempfile.py", line 35, in <module> from random import Random as _Random File "/usr/lib64/python2.7/random.py", line 49, in <module> import hashlib as _hashlib File "/usr/lib64/python2.7/hashlib.py", line 116, in <module> import _hashlib ImportError: /usr/lib64/python2.7/lib-dynload/_hashlib.so: symbol HMAC_CTX_copy, version libcrypto.so.10 not defined in file libcrypto.so.10 with link time reference

[martijnbastiaan]

Alternatively, if you don’t want or cannot change your Xcelium distribution you can patch these lines:

https://github.com/cocotb/cocotb/blob/4946a08d744f2b96ca0e85d62efba3203710da10/cocotb/share/makefiles/simulators/Makefile.xcelium#L110-L112

Splicing an extra line LD_PRELOAD="/lib64/libcrypto.so.10 /lib64/libssl.so.10" \ in between such that it reads:

	MODULE=$(MODULE) TESTCASE=$(TESTCASE) TOPLEVEL=$(TOPLEVEL) GPI_EXTRA=$(GPI_EXTRA) TOPLEVEL_LANG=$(TOPLEVEL_LANG) \
	LD_PRELOAD="/lib64/libcrypto.so.10 /lib64/libssl.so.10" \
	$(CMD) -timescale $(COCOTB_HDL_TIMEUNIT)/$(COCOTB_HDL_TIMEPRECISION) \
	$(EXTRA_ARGS) $(GPI_ARGS) $(INCDIRS) -access +rwc -createdebugdb $(MAKE_LIB) $(HDL_SOURCES) $(PLUSARGS) 2>&1 | tee $(SIM_BUILD)/sim.log

seems to work for me.

[flamehj]

Thanks, @stuarthodgson, @jrpetrus! It really works!