First cut of a cmake build.

Building on macOS right now.  cmake will soon replace qmake
as the supported build system.  Some notes about the
implementation:

* libquackle and libquackleio can be separately built as before.
* quacker still links to the static libraries for libquackle and libquackleio,
  but quacker's cmake file includes those projects, which means
  everything builds at once.  No more need to run separate builds
  of everything to get a GUI.  And debugging is easier now that
  the libraries are incorporated into the quacker project.
* I tried to get cmake to build the macOS app bundle, but cmake
  is unable, by conventional means, to build a non-flat Resources
  directory (which many people have complained about).  Right
  now, the default build just builds the binary, and you have to run
  it from the command-line.  But -DBUNDLE=ON will build a shell
  of a bundle.  It won't work, but I intend to create an Xcode project
  from it for building the bundle, to make it easier for me to deliver
  a code-signed and notarized app bundle.
* I've got CMakeLists.txt files for the resources, but they're not
  really doing anything right now.  Maybe later.
* Minimum macOS version for the cmake build is 10.10.

1 files changed, 6 insertions, 0 deletions

diff --git a/Settings.cmake b/Settings.cmake
new file mode 100644
index 0000000..df21391
--- /dev/null
+++ b/Settings.cmake
@@ -0,0 +1,6 @@
+include_guard()
+
+message("-- Including settings")
+set(CMAKE_CXX_STANDARD 14)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_OSX_DEPLOYMENT_TARGET 10.10)