The GNU C Library cannot be compiled in the source directory. You must build it in a separate build directory. For example, if you have unpacked the GNU C Library sources in /src/gnu/glibc-VERSION, create a directory /src/gnu/glibc-build to put the object files in.
The steps to build Glibc for Occlum are as follows:
- Install the required modules
sudo apt-get update
sudo apt-get install gawk bison -y
- Configure, build and install Glibc
cd <glibc-build-folder>
unset LD_LIBRARY_PATH
CFLAGS="-O2 -g" <glibc-VERSION>/configure \
--prefix=<glibc-install-folder> --with-tls --without-selinux --enable-stack-protector=strong --disable-nscd
make
make install
When completed, the resulting Glibc can be found in <glibc-install-folder> directory.