In /usr/bin/libassuan-config line 27:
exec_prefix_set=no
^-------------^ SC2034: exec_prefix_set appears unused. Verify use (or export if used externally).


In /usr/bin/libassuan-config line 47:
	exit $1
             ^-- SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
	exit "$1"


In /usr/bin/libassuan-config line 56:
  -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
               ^-- SC2006: Use $(...) notation instead of legacy backticked `...`.

Did you mean: 
  -*=*) optarg=$(echo "$1" | sed 's/[-_a-zA-Z0-9]*=//') ;;


In /usr/bin/libassuan-config line 57:
  *) optarg= ;;
     ^----^ SC2034: optarg appears unused. Verify use (or export if used externally).


In /usr/bin/libassuan-config line 130:
    echo $includes $cflags
         ^-------^ SC2086: Double quote to prevent globbing and word splitting.
                   ^-----^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
    echo "$includes" "$cflags"


In /usr/bin/libassuan-config line 142:
    echo $libdirs $lib $extralibs
         ^------^ SC2086: Double quote to prevent globbing and word splitting.
                       ^--------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
    echo "$libdirs" $lib "$extralibs"

For more information:
  https://www.shellcheck.net/wiki/SC2034 -- exec_prefix_set appears unused. V...
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...
  https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...