undefined reference to symbol 'SHA256_Init'

Uwe Kubosch uwe at kubosch.no
Sat May 22 22:58:32 UTC 2010

Thank you for your reply.  I was able to fix the immediate error by linking with libcrypto as suggested.

Now I get

gcc -o cmd/zdb/zdb -pipe -Wall -s cmd/zdb/zdb.o cmd/zdb/zdb_il.o cmd/zdb/ptrace.o lib/libavl/libavl.a lib/libnvpair/libnvpair-user.a lib/libumem/libumem.a lib/libzfs/libzfs.a lib/libzpool/libzpool-user.a lib/libzfscommon/libzfscommon-user.a lib/libuutil/libuutil.a lib/libsolcompat/libsolcompat.a -lrt -lpthread -ldl -lz -lm -laio -lssl -lcrypto
lib/libzfs/libzfs.a(libzfs_pool.o): In function `zpool_valid_proplist':
libzfs_pool.c:(.text+0x3355): undefined reference to `S_ISDIR'

This time there is no suggestion for what to link to.  Do you have a suggestion?

On May 22, 2010, at 11:37 PM, Rahul Sundaram wrote:

> On 05/23/2010 03:04 AM, Uwe Kubosch wrote:
>> Hi all!
>> I am having trouble building zfs-fuse for F-13 and devel:
>> /usr/bin/ld: lib/libzfs/libzfs.a(libzfs_sendrecv.o): undefined reference to symbol 'SHA256_Init'
>> /usr/bin/ld: note: 'SHA256_Init' is defined in DSO /usr/lib64/libcrypto.so.10 so try adding it to the linker command line
>> /usr/lib64/libcrypto.so.10: could not read symbols: Invalid operation
>> I have openssl-devel as a build dependency, but something has changed
>> in F-13 and devel to break the build.
> Refer to
> http://fedoraproject.org/wiki/UnderstandingDSOLinkChange
> Rahul

With kind regards
Uwe Kubosch
Kubosch Consulting
uwe at kubosch.no

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