/usr/bin/pcre2-config is in libpcre2-dev 10.31-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110  | #!/bin/sh
prefix=/usr
exec_prefix=${prefix}
exec_prefix_set=no
cflags="[--cflags]"
libs=
if test yes = yes ; then
  libs="[--libs16] $libs"
fi
if test yes = yes ; then
  libs="[--libs32] $libs"
fi
if test yes = yes ; then
  libs="[--libs8] [--libs-posix] $libs"
  cflags="$cflags [--cflags-posix]"
fi
usage="Usage: pcre2-config [--prefix] [--exec-prefix] [--version] $libs $cflags"
if test $# -eq 0; then
      echo "${usage}" 1>&2
      exit 1
fi
libR=
libS=
while test $# -gt 0; do
  case "$1" in
  -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
  *) optarg= ;;
  esac
  case $1 in
    --prefix=*)
      prefix=$optarg
      if test $exec_prefix_set = no ; then
        exec_prefix=$optarg
      fi
      ;;
    --prefix)
      echo $prefix
      ;;
    --exec-prefix=*)
      exec_prefix=$optarg
      exec_prefix_set=yes
      ;;
    --exec-prefix)
      echo $exec_prefix
      ;;
    --version)
      echo 10.31
      ;;
    --cflags)
      if test ${prefix}/include != /usr/include ; then
        includes=-I${prefix}/include
      fi
      echo $includes 
      ;;
    --cflags-posix)
      if test yes = yes ; then
        if test ${prefix}/include != /usr/include ; then
          includes=-I${prefix}/include
        fi
        echo $includes 
      else
        echo "${usage}" 1>&2
      fi
      ;;
    --libs-posix)
      if test yes = yes ; then
        echo $libS$libR -lpcre2-posix -lpcre2-8
      else
        echo "${usage}" 1>&2
      fi
      ;;
    --libs8)
      if test yes = yes ; then
        echo $libS$libR -lpcre2-8
      else
        echo "${usage}" 1>&2
      fi
      ;;
    --libs16)
      if test yes = yes ; then
        echo $libS$libR -lpcre2-16
      else
        echo "${usage}" 1>&2
      fi
      ;;
    --libs32)
      if test yes = yes ; then
        echo $libS$libR -lpcre2-32
      else
        echo "${usage}" 1>&2
      fi
      ;;
    *)
      echo "${usage}" 1>&2
      exit 1
      ;;
  esac
  shift
done
 |