In /usr/bin/apr-1-config line 28:
datarootdir="${exec_prefix}/share/apr"
^---------^ SC2034: datarootdir appears unused. Verify use (or export if used externally).


In /usr/bin/apr-1-config line 29:
datadir="${exec_prefix}/share/apr"
^-----^ SC2034: datadir appears unused. Verify use (or export if used externally).


In /usr/bin/apr-1-config line 42:
APR_SOURCE_DIR="$(cd /usr/share/apr-1.0/build/.. ; pwd)"
                  ^----------------------------^ SC2164: Use 'cd ... || exit' or 'cd ... || return' in case cd fails.

Did you mean: 
APR_SOURCE_DIR="$(cd /usr/share/apr-1.0/build/.. || exit ; pwd)"


In /usr/bin/apr-1-config line 105:
    -*=*) 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/apr-1-config line 115:
    echo $prefix
         ^-----^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
    echo "$prefix"


In /usr/bin/apr-1-config line 131:
    echo $flags
         ^----^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
    echo "$flags"


In /usr/bin/apr-1-config line 139:
    echo $CPP
         ^--^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
    echo "$CPP"


In /usr/bin/apr-1-config line 165:
    echo $APR_SOURCE_DIR
         ^-------------^ SC2086: Double quote to prevent globbing and word splitting.

Did you mean: 
    echo "$APR_SOURCE_DIR"

For more information:
  https://www.shellcheck.net/wiki/SC2034 -- datadir appears unused. Verify us...
  https://www.shellcheck.net/wiki/SC2164 -- Use 'cd ... || exit' or 'cd ... |...
  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...