The 2026 upstream Linux binaries (olex2c, olex2, unirun, NoSpherA2,
openblas, cctbx ext) need GLIBC_2.38 / GLIBCXX_3.4.32; RHEL9 has 2.34 /
3.4.29 so they cannot run natively and a newer libc cannot be supplied
via LD_LIBRARY_PATH. Fetch frozen Fedora 40 glibc/libstdc++/libgcc rpms
from kojipkgs plus a static patchelf (all sha256-pinned), extract them
into PREFIX/sysroot and set interpreter + DT_RPATH on the dynamic
executables. Host keeps providing GTK2/X11/GL. Launcher sets C.UTF-8 and
never exposes the sysroot on LD_LIBRARY_PATH. Install verifies with
ld.so --list that olex2c resolves through the bundled glibc.
duan_j
53a5753541