gsl install failure

Operating System: Manjaro-ARM
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Kernel Version: 5.10.7-1-MANJARO-ARM
OS Type: 64-bit
Processors: 6 ×
Memory: 3.7 GiB of RAM
Graphics Processor: Mali T860

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GNU Octave Version: 6.1.0 (hg id: fb528d34f1ef)
GNU Octave License: GNU General Public License
Operating System: Linux 5.10.7-1-MANJARO-ARM #1 SMP Tue Jan 12 20:54:53 UTC 2021 aarch64
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Package Name    | Version | Installation directory
----------------+---------+-----------------------
communications  |   1.2.2 | /home/tjh/octave/communications-1.2.2
       control  |   3.2.0 | /home/tjh/octave/control-3.2.0
data-smoothing  |   1.3.0 | /home/tjh/octave/data-smoothing-1.3.0
     dataframe  |   1.2.0 | /home/tjh/octave/dataframe-1.2.0
        divand  |   1.1.2 | /home/tjh/octave/divand-1.1.2
            ga  |  0.10.1 | /home/tjh/octave/ga-0.10.1
       general  |   2.1.1 | /home/tjh/octave/general-2.1.1
      geometry  |   4.0.0 | /home/tjh/octave/geometry-4.0.0
         image  |  2.12.0 | /home/tjh/octave/image-2.12.0
      interval *|   3.2.0 | /home/tjh/octave/interval-3.2.0
            io *|   2.6.1 | /home/tjh/octave/io-2.6.1
linear-algebra  |   2.2.3 | /home/tjh/octave/linear-algebra-2.2.3
          lssa  |   0.1.3 | /home/tjh/octave/lssa-0.1.3
         ltfat  |   2.3.1 | /home/tjh/octave/ltfat-2.3.1
       mapping  |   1.4.0 | /home/tjh/octave/mapping-1.4.0
       matgeom  |   1.2.2 | /home/tjh/octave/matgeom-1.2.2
           nan  |   3.5.0 | /home/tjh/octave/nan-3.5.0
         nurbs  |  1.3.13 | /home/tjh/octave/nurbs-1.3.13
         optim  |   1.6.0 | /home/tjh/octave/optim-1.6.0
   optiminterp  |   0.3.6 | /home/tjh/octave/optiminterp-0.3.6
      parallel  |   4.0.0 | /home/tjh/octave/parallel-4.0.0
        signal  |   1.4.1 | /home/tjh/octave/signal-1.4.1
       splines  |   1.3.3 | /home/tjh/octave/splines-1.3.3
    statistics *|   1.4.2 | /home/tjh/octave/statistics-1.4.2
           stk  |   2.6.1 | /home/tjh/octave/stk-2.6.1
        struct  |  1.0.16 | /home/tjh/octave/struct-1.0.16
      symbolic  |   2.9.0 | /home/tjh/octave/symbolic-2.9.0
           tsa  |   4.6.2 | /home/tjh/octave/tsa-4.6.2