OSX sdk changes

- Adds pre-built OpenVR.framework for macOS support, defaults to universal 32-/64-bit binary building, see src/README
- corrects macOS framework structure and @rpath of .framework and .dylib binaries. supports building 32-bit-only dylib.

CL3996577, 3996634, 4006665

[git-p4: depot-paths = "//vr/steamvr/sdk_release/": change = 4009638]

Author: jeremyselan

CMakeLists.txt

@@ -6,6 +6,9 @@ project(OpenVRSDK)
 
 # Setup some options.
 option(BUILD_SHARED "Builds the library as shared library" OFF)
+option(BUILD_FRAMEWORK "Builds the library as an apple Framework" OFF)
+option(BUILD_UNIVERSAL "Builds the shared or framework as a universal (fat, 32- & 64-bit) binary" ON)
+option(BUILD_OSX_I386 "Builds the shared or framework as a 32-bit binary, even on a 64-bit platform" OFF)
 option(USE_LIBCXX "Uses libc++ instead of libstdc++" ON)
 option(USE_CUSTOM_LIBCXX "Uses a custom libc++" OFF)
 
@@ -34,6 +37,13 @@ elseif(APPLE)
   if(CMAKE_SYSTEM_NAME MATCHES ".*Darwin.*" OR CMAKE_SYSTEM_NAME MATCHES ".*MacOS.*")
     set(PLATFORM_NAME "osx")
     add_definitions(-DOSX -DPOSIX)
+    if(BUILD_UNIVERSAL)
+      set(CMAKE_OSX_ARCHITECTURES "i386;x86_64")
+    endif()
+    if(BUILD_OSX_I386)
+      set(PROCESSOR_ARCH "32")
+      set(CMAKE_OSX_ARCHITECTURES "i386")
+    endif()
   endif()
 endif()
 

bin/osx64/OpenVR.framework/Headers

@@ -0,0 +1 @@
+Versions/Current/Headers

bin/osx64/OpenVR.framework/OpenVR

@@ -0,0 +1 @@
+Versions/Current/OpenVR

bin/osx64/OpenVR.framework/Resources

@@ -0,0 +1 @@
+Versions/Current/Resources