Install GNU libc version parallel to existing system

glibc_install.sh

# Claas Heuer, August 2015
# 
# urls:
# http://stackoverflow.com/questions/847179/multiple-glibc-libraries-on-a-single-host
# http://www.gnu.org/software/libc/download.html

cd $HOME
mkdir glibc_update
cd glibc_update

libc_version=2.19

# get the version you want:
wget http://ftp.gnu.org/gnu/glibc/glibc-${libc_version}.tar.gz

tar -xf glibc-${libc_version}.tar.gz

# configure and set the installation path
cd glibc-${libc_version}
mkdir build
cd build
../configure --prefix=/opt/glibc${libc_version}

# compile
make -j6

sudo make install



##############################################
### Run some software that need that glibc ###
##############################################


LD_PRELOAD="/opt/glibc${libc_version}/lib/libc.so.6 /opt/glibc${libc_version}/lib/libpthread.so.0 /opt/glibc${libc_version}/lib/ld-linux-x86-64.so.2" ./my_prog

When building with newer gcc versions (e.g. on Ubuntu 20.04) the build might fail. Should add --disable-werror to the configure stage. cirosantilli/linux-kernel-module-cheat#97

I want you build it in Debian 11 but I can't even if I use --disable-werror. Is there any other way to build glibc-2.26?