$ /opt/homebrew/bin/h5cc -show
/opt/homebrew/h5cc
dir is /opt/homebrew
clang: error: unknown argument: '-show'

$ pkg-config --cflags --libs hdf5
-I/opt/homebrew/Cellar/hdf5/1.14.4.3/include -L/opt/homebrew/Cellar/hdf5/1.14.4.3/lib -lhdf5

#! /bin/sh
##
# Copyright by The HDF Group.
# All rights reserved.
#
# This file is part of HDF5.  The full HDF5 copyright notice, including
# terms governing use, modification, and redistribution, is contained in
# the COPYING file, which can be found at the root of the source code
# distribution tree, or in https://www.hdfgroup.org/licenses.
# If you do not have access to either file, you may request a copy from
# help@hdfgroup.org.
##

prg=$0
if [ ! -e "$prg" ]; then
  case $prg in
    (*/*) exit 1;;
    (*) prg=$(command -v -- "$prg") || exit;;
  esac
fi
dir=$(
  cd -P -- "$(dirname -- "$prg")/.." && pwd -P
) || exit
prg=$dir/$(basename -- "$prg") || exit

printf '%s\n' "$prg"
printf 'dir is %s\n' "$dir"


# Show the configuration summary of the library recorded in the
# libhdf5.settings file residing in the lib directory.
showconfigure()
{
  cat $dir/lib/libhdf5.settings
  status=$?
}

export PKG_CONFIG_PATH=$dir/lib/pkgconfig

for arg in $@ ; do
  case "$arg" in
    -showconfig)
      showconfigure
      exit $status
      ;;
    *)
      clang $@ `pkg-config --define-variable=prefix=$dir --cflags --libs hdf5`
      status=$?
      exit $status
      ;;
  esac
done