On Linux ld defaults search path contains non-relocated paths

[traversaro]

I do not know if this is a known issue or if it is even solvable, but given that I did not find any reference to it anywhere, I think it is worth at least documenting it somewhere.

It seems that the ld linker default search (see https://stackoverflow.com/questions/9922949/how-to-print-the-ldlinker-search-path) contains some absolute path of the environment that build the linker, that was not relocated during the installation:

(cmake-tests) traversaro@IITICUBLAP102:~/1d6e3bb4e737ba80ef6ad255e3734a32$ ld --verbose | grep SEARCH_DIR | tr -s ' ;' \\012
SEARCH_DIR("=/home/conda/feedstock_root/build_artifacts/binutils_split_1605279079140/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeh/x86_64-conda-linux-gnu/lib64")
SEARCH_DIR("=/usr/local/lib64")
SEARCH_DIR("=/lib64")
SEARCH_DIR("=/usr/lib64")
SEARCH_DIR("=/home/conda/feedstock_root/build_artifacts/binutils_split_1605279079140/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeh/x86_64-conda-linux-gnu/lib")
SEARCH_DIR("=/usr/local/lib")
SEARCH_DIR("=/lib")
SEARCH_DIR("=/usr/lib")

Related issue: conda-forge/cmake-feedstock#129 .

Environment (conda list):

$ conda list
(cmake-tests) traversaro@IITICUBLAP102:~/1d6e3bb4e737ba80ef6ad255e3734a32$ conda list
# packages in environment at /home/traversaro/miniconda3/envs/cmake-tests:
#
# Name                    Version                   Build  Channel
_libgcc_mutex             0.1                 conda_forge    conda-forge
_openmp_mutex             4.5                       1_gnu    conda-forge
binutils                  2.35.1               hdd6e379_0    conda-forge
binutils_impl_linux-64    2.35.1               h17ad2fc_0    conda-forge
binutils_linux-64         2.35                hc3fd857_29    conda-forge
bzip2                     1.0.8                h7b6447c_0
c-compiler                1.1.2                h7f98852_0    conda-forge
ca-certificates           2020.11.8            ha878542_0    conda-forge
cmake                     3.19.1               h1f3970d_0    conda-forge
compilers                 1.1.2                ha770c72_0    conda-forge
cxx-compiler              1.1.2                h4bd325d_0    conda-forge
expat                     2.2.10               he6710b0_2
fortran-compiler          1.1.2                h1990efc_0    conda-forge
gcc_impl_linux-64         9.3.0               h28f5a38_17    conda-forge
gcc_linux-64              9.3.0               h7247604_29    conda-forge
gfortran_impl_linux-64    9.3.0               h2bb4189_17    conda-forge
gfortran_linux-64         9.3.0               ha1c937c_29    conda-forge
gxx_impl_linux-64         9.3.0               h53cdd4c_17    conda-forge
gxx_linux-64              9.3.0               h0d07fa4_29    conda-forge
kernel-headers_linux-64   2.6.32              h77966d4_13    conda-forge
krb5                      1.18.2               h173b8e3_0
ld_impl_linux-64          2.35.1               hed1e6ac_0    conda-forge
libcurl                   7.71.1               h20c2e04_1
libedit                   3.1.20191231         h14c3975_1
libgcc-devel_linux-64     9.3.0               hfd08b2a_17    conda-forge
libgcc-ng                 9.3.0               h5dbcf3e_17    conda-forge
libgfortran-ng            9.3.0               he4bcb1c_17    conda-forge
libgfortran5              9.3.0               he4bcb1c_17    conda-forge
libgomp                   9.3.0               h5dbcf3e_17    conda-forge
libssh2                   1.9.0                h1ba5d50_1
libstdcxx-devel_linux-64  9.3.0               h4084dd6_17    conda-forge
libstdcxx-ng              9.3.0               h2ae2ef3_17    conda-forge
libuv                     1.40.0               h7b6447c_0
lz4-c                     1.9.2                heb0550a_3
ncurses                   6.2                  he6710b0_1
openssl                   1.1.1h               h516909a_0    conda-forge
rhash                     1.4.0                h1ba5d50_0
sysroot_linux-64          2.12                h77966d4_13    conda-forge
xz                        5.2.5                h7b6447c_0
zlib                      1.2.11               h7b6447c_3
zstd                      1.4.5                h9ceee32_0

Details about conda and system ( conda info ):

$ conda info
(cmake-tests) traversaro@IITICUBLAP102:~/1d6e3bb4e737ba80ef6ad255e3734a32$ conda info

     active environment : cmake-tests
    active env location : /home/traversaro/miniconda3/envs/cmake-tests
            shell level : 2
       user config file : /home/traversaro/.condarc
 populated config files : /home/traversaro/.condarc
          conda version : 4.8.3
    conda-build version : not installed
         python version : 3.8.3.final.0
       virtual packages : __glibc=2.31
       base environment : /home/traversaro/miniconda3  (writable)
           channel URLs : https://repo.anaconda.com/pkgs/main/linux-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/linux-64
                          https://repo.anaconda.com/pkgs/r/noarch
          package cache : /home/traversaro/miniconda3/pkgs
                          /home/traversaro/.conda/pkgs
       envs directories : /home/traversaro/miniconda3/envs
                          /home/traversaro/.conda/envs
               platform : linux-64
             user-agent : conda/4.8.3 requests/2.24.0 CPython/3.8.3 Linux/4.19.104-microsoft-standard ubuntu/20.04.1 glibc/2.31
                UID:GID : 1000:1000
             netrc file : None
           offline mode : False