undefined reference to symbol 'pthread_setname_np##GLIBC_2.12' Haskell Stack error on OpenSuse42.3 - haskell

Question

I have installed haskell stack and I'm trying to setup ghc for the same. stack version is
stack --version
Version 1.5.1, Git revision 600c1f01435a10d127938709556c1682ecfd694e (4861 commits) x86_64 hpack-0.17.1
I have updated the ~/.stack/global-project/stack.yaml as below
# This is the implicit global project's config file, which is only used when
# 'stack' is run outside of a real project. Settings here do _not_ act as
# defaults for all projects. To change stack's default settings, edit
# '/home/rajkumar/.stack/config.yaml' instead.
#
# For more information about stack's configuration, see
# http://docs.haskellstack.org/en/stable/yaml_configuration/
#
flags: {}
extra-package-dbs: []
packages: []
extra-deps: []
resolver: ghc-8.2.1
Then I run stack setup command and got the below error -
stack setup
The GHC located at /home/rajkumar/.stack/programs/x86_64-linux/ghc-8.2.1/bin/ghc failed to compile a sanity check. Please see:
http://docs.haskellstack.org/en/stable/install_and_upgrade/
for more information. Exception was:
Running /home/rajkumar/.stack/programs/x86_64-linux/ghc-8.2.1/bin/ghc /tmp/stack-sanity-check3048/Main.hs -no-user-package-db in directory /tmp/stack-sanity-check3048/ exited with ExitFailure 1
[1 of 1] Compiling Main ( /tmp/stack-sanity-check3048/Main.hs, /tmp/stack-sanity-check3048/Main.o )
Linking /tmp/stack-sanity-check3048/Main ...
/usr/bin/ld.bfd: /home/rajkumar/.stack/programs/x86_64-linux/ghc-8.2.1/lib64/ghc-8.2.1/rts/libHSrts.a(OSThreads.o): undefined reference to symbol 'pthread_setname_np##GLIBC_2.12'
/lib64/libpthread.so.0: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
`gcc' failed in phase `Linker'. (Exit code: 1)

Answer 1

So maybe the problem is that you need GLIBC_2.12 installed on your machine and not 2.26
No, that is not the issue. GLIBC-2.26 most certainly provides the pthread_setname_np##GLIBC_2.12 symbol (see this answer to understand how symbol versioning works).
You can verify that the symbol is indeed available in your GLIBC-2.26 like so:
$ readelf -Ws /lib/x86_64-linux-gnu/libpthread.so.0 | grep pthread_setname_np
89: 00000000000113c0 258 FUNC GLOBAL DEFAULT 13 pthread_setname_np##GLIBC_2.12
704: 00000000000113c0 258 FUNC GLOBAL DEFAULT 13 pthread_setname_np
(Above command was executed on a system with GLIBC-2.19, but you'll get the same output on a system with GLIBC-2.26).
Now to what your real problem is: libHSrts.a(OSThreads.o) references pthread_setname_np (and likely other pthread_* symbols, but you are not linking with -pthread or -lpthread flag.
I don't know where to add this flag to GHC, but once you find that out, your problem will be solved.