Building on macOS with cmake.txt

# SPDX-FileCopyrightText: 2024 Duncan Greatwood
#
# SPDX-License-Identifier: Apache-2.0

Making Pistache on macOS with cmake
===================================

Building pistache using cmake is deprecated. Users are encouraged to
use Meson only when building from source. CMake build scripts are only
offered for convenience to users who depend on them for some reason,
since they previously were the recommended way to build Pistache.

In addition to what is described in "Making Pistache on macOS", the
following are needed.

brew:
  brew install cmake
  brew install howard-hinnant-date

Additional convenience scripts can be used if helpful:
  cmkbuild.sh - build release version using cmake
  cmkbuilddebug.sh - build debug version using cmake

If using cmake, you should add some homebrew setup to your .bashrc/.zshrc:

  if [ "$(uname)" == "Darwin" ]; then
      MYBREWCMD=brew
      if [[ $(uname -m) == 'x86_64' ]]; then
          if [ -e "/usr/local/bin/brew" ]; then
              MYBREWCMD="/usr/local/bin/brew"
          fi
      else
          if [ -e "/opt/homebrew/bin/brew" ]; then
              MYBREWCMD="/opt/homebrew/bin/brew"
          fi
      fi
      if command -v ${MYBREWCMD} &> /dev/null
      then
          # Setup brew environment variables
          #     HOMEBREW_PREFIX, HOMEBREW_CELLAR and HOMEBREW_REPOSITORY
          # Also updates PATH, MANPATH and INFOPATH
          eval "$(${MYBREWCMD} shellenv)"
      fi
      unset MYBREWCMD
  fi

And then also add to your .bashrc/.zshrc:
  if command -v brew &> /dev/null
  then
      export HOMEBREW_LIB_DIR=$HOMEBREW_PREFIX/lib
      export HOMEBREW_INC_DIR=$HOMEBREW_PREFIX/include
  
      if [ -d "$HOMEBREW_LIB_DIR" ]
         then
         export LD_LIBRARY_PATH=$HOMEBREW_LIB_DIR:$LD_LIBRARY_PATH
      fi
  
      if [ -d "$HOMEBREW_INC_DIR" ]
         then
         export CFLAGS="-I$HOMEBREW_INC_DIR $CFLAGS"
         export CXXFLAGS="-I$HOMEBREW_INC_DIR $CXXFLAGS"
         export CPPFLAGS="-I$HOMEBREW_INC_DIR $CPPFLAGS"
      fi
  fi

Note: When using cmake on Linux (NOT macOS), you will need to manually
install googletest. install_gtest_gmock.sh in this gist provides the
method (verified on Ubuntu 22.04, April/2024):
    https://gist.github.com/dlime/313f74fd23e4267c4a915086b84c7d3d