GLIBC_2.26 installation

[Harry4FunResearch]

The current system has GLIBC_2.30, but I need a lower version, namely GLIBC_2.26, for my code. I wonder if it is possible to install GLIBC_2.26?

[nrcfieldsa]

Two possible approaches:

1. Load older gcc 4.9 in CC stack: module load nixpkgs/16.09 gcc/4.9.4; module list; gcc --version
2. Make use of gcc 4.8.5 in the OS w/o CC stack: module --force purge; module list; gcc --version

GLIBC_2.26 may be available in the CentOS 7 base OS. When you build and run this software, do you need access to any of the Compute Canada libraries other than gcc?

GLIBC-2.26 – INSTALL NOTES ( https://sourceware.org/git/?p=glibc.git;a=blob;f=INSTALL;hb=glibc-2.26 ):
· GCC 4.9 or higher is required.. As of release time, GCC 7.1 is the newest compiler verified to work to build the GNU C Library.
· GNU 'binutils' 2.25 or later.. As of release time, GNU 'binutils' 2.27 is the newest.
· We recommend GNU 'make' version 3.79

CentOS 7 base OS gcc compiler and toolchain:

$ module --force purge nixpkgs gcc
$ module list   # No modules loaded
$ gcc --version
gcc (GCC) 4.8.5 20150623 (RedHat 4.8.5-44)
$ rpm -q –provides glibc|grep GLIBC_2.2.6
libc.so.6(GLIBC_2.2.6)
libpthread.so.0(GLIBC_2.2.6) 

[Harry4FunResearch]

Thanks Allan!
"When you build and run this software, do you need access to any of the Compute Canada libraries other than gcc?"
No, I just need the GLIBC_2.26 library.

This is the full error message I got:
ImportError: /home/guoh/custom_libs/lib/x86_64-linux-gnu/libc.so.6: version `GLIBC_2.26' not found (required by /cvmfs/soft.computecanada.ca/easybuild/software/2020/sse3/Core/python/3.7.9/lib/libpython3.7m.so.1.0)

[nrcfieldsa]

Please try with-out referring to your own version of libc.so.6 and with-out using Compute Canada software stack at all.

The system-wide version of gcc, glibc, binutils and python should remain compatible with GLIBC_2.26 if you unload any environment modules and custom LD_LIBRARY_PATH's set-up before, and test from a clean slate in CentOS 7.

$ module --force purge
$ echo $LD_LIBRARY_PATH|grep -q '^$' && \
   make clean && \
   ./configure [--args ..]  && \
   make

[Harry4FunResearch]

Is this the one you referred to for the Compute Canada software stack: "module load miniconda3-4.7.12.1-gcc-9.2.0-j2idqxp"?