In /usr/bin/pcre-config line 36: case `uname -s` in ^--------^ SC2006: Use $(...) notation instead of legacy backticked `...`. Did you mean: case $(uname -s) in In /usr/bin/pcre-config line 52: -*=*) 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/pcre-config line 64: echo $prefix ^-----^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: echo "$prefix" In /usr/bin/pcre-config line 71: echo $exec_prefix ^----------^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: echo "$exec_prefix" In /usr/bin/pcre-config line 77: if test ${prefix}/include != /usr/include ; then ^-------^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: if test "${prefix}"/include != /usr/include ; then In /usr/bin/pcre-config line 84: if test ${prefix}/include != /usr/include ; then ^-------^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: if test "${prefix}"/include != /usr/include ; then In /usr/bin/pcre-config line 94: echo $libS$libR -lpcreposix -lpcre ^---^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: echo $libS"$libR" -lpcreposix -lpcre In /usr/bin/pcre-config line 101: echo $libS$libR -lpcre ^---^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: echo $libS"$libR" -lpcre In /usr/bin/pcre-config line 108: echo $libS$libR -lpcre16 ^---^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: echo $libS"$libR" -lpcre16 In /usr/bin/pcre-config line 115: echo $libS$libR -lpcre32 ^---^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: echo $libS"$libR" -lpcre32 In /usr/bin/pcre-config line 122: echo $libS$libR -lpcrecpp -lpcre ^---^ SC2086: Double quote to prevent globbing and word splitting. Did you mean: echo $libS"$libR" -lpcrecpp -lpcre For more information: https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ... https://www.shellcheck.net/wiki/SC2006 -- Use $(...) notation instead of le...