In /usr/bin/xslt-config line 24: exit $1 ^-- SC2086: Double quote to prevent globbing and word splitting. Did you mean: exit "$1" In /usr/bin/xslt-config line 33: -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;; ^-- SC2006: Use $(...) notation instead of legacy backticked `...`. Did you mean: -*=*) optarg=$(echo "$1" | sed 's/[-_a-zA-Z0-9]*=//') ;; In /usr/bin/xslt-config line 41: libdir=${prefix}/lib ^----^ SC2034: libdir appears unused. Verify use (or export if used externally). In /usr/bin/xslt-config line 48: echo $prefix ^-----^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: echo "$prefix" In /usr/bin/xslt-config line 57: echo $exec_prefix ^----------^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: echo "$exec_prefix" In /usr/bin/xslt-config line 120: echo $other_flags $ord_libs ^----------^ SC2086: Double quote to prevent globbing and word splitting. ^-------^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: echo "$other_flags" "$ord_libs" For more information: https://www.shellcheck.net/wiki/SC2034 -- libdir appears unused. Verify use... https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ... https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...