check linking against libs in sysroot

[beckermr]

One thing the environment here does is always install the sysroot packages. These are only supposed to be used at build time and not at run time.

I wonder if SOs in the environment might be linking against them instead of the corresponding libraries supplied by the OS.

If this is true, then the sysroot packages need to be removed from the env.

[beckermr]

Things appear to be ok

(test) root@92f160059dbc:/# LD_DEBUG=libs python -c "import lsst.afw" 2>&1 | grep "libm\."
      3207:	find library=libm.so.6 [0]; searching
      3207:	  trying file=/opt/conda/envs/test/bin/../lib/libm.so.6
      3207:	  trying file=/opt/conda/envs/test/share/eups/Linux64/afw/21.0.0-15-gedb9d5423+093f827fa0/lib/libm.so.6
      3207:	  trying file=/opt/conda/envs/test/share/eups/Linux64/astshim/21.0.0-2-g45278ab+e70536a077/lib/libm.so.6
      3207:	  trying file=/opt/conda/envs/test/share/eups/Linux64/sphgeom/21.0.0+e70536a077/lib/libm.so.6
      3207:	  trying file=/opt/conda/envs/test/share/eups/Linux64/geom/21.0.0-2-g8f08a60+37af6e4b43/lib/libm.so.6
      3207:	  trying file=/opt/conda/envs/test/share/eups/Linux64/log/21.0.0-3-g7d9da8d+3d46b50fa2/lib/libm.so.6
      3207:	  trying file=/opt/conda/envs/test/share/eups/Linux64/daf_persistence/21.0.0-5-gdf36809+51e1abfa8d/lib/libm.so.6
      3207:	  trying file=/opt/conda/envs/test/share/eups/Linux64/pex_exceptions/21.0.0-2-gde069b7+e4a9d806b1/lib/libm.so.6
      3207:	  trying file=/opt/conda/envs/test/share/eups/Linux64/base/21.0.0-5-g5fb7357+e70536a077/lib/libm.so.6
      3207:	  trying file=/opt/conda/envs/test/share/eups/Linux64/utils/21.0.0-4-gccdca77+29267fd41f/lib/libm.so.6
      3207:	  trying file=/opt/conda/envs/test/share/eups/Linux64/daf_base/21.0.0+3d46b50fa2/lib/libm.so.6
      3207:	  trying file=/lib/x86_64-linux-gnu/libm.so.6
      3207:	calling init: /lib/x86_64-linux-gnu/libm.so.6
      3207:	calling fini: /lib/x86_64-linux-gnu/libm.so.6 [0]