Fix MacOSX build issues (#2124)

* #include an absolute path didn't work - because paths were taken to always be relative.

* Small fixes.
Added compiler crash with generic defined in a function.
Added enum-flags test that works (by limiting backing type to int), and using __EnumType constraint.

* Add comment about crash.

* Disable crashing test.

* Fixes to make compile on OSX.

* Add github build for OSX.

* Make premake generator a utility.

* Fix osx compilation issue.

* More fixes for OSX build.

* OSX fix due to ambiguity around size_t and integer types.

* Disable xlib on build on osx.

* Use 'prebuildcommands' to make prebuild make utility projects do something.

* Small fixes for premake so utility works on linux/osx.

* Another hack to try and make generators run when 'utility'

* Fix typo in macos.yml.

* Revert premake to old style, and disable stdlib embedding on OSX.

1 files changed, 8 insertions, 1 deletions

diff --git a/slang.h b/slang.h
index cdc0daeab..83b10fc74 100644
--- a/slang.h
+++ b/slang.h
@@ -490,13 +490,20 @@ extern "C"
 
     // Use SLANG_PTR_ macros to determine SlangInt/SlangUInt types.
     // This is used over say using size_t/ptrdiff_t/intptr_t/uintptr_t, because on some targets, these types are distinct from
-    // their uint_t/int_t equivalents and so produce ambiguity with function overloading.   
+    // their uint_t/int_t equivalents and so produce ambiguity with function overloading.
+    //
+    // SlangSizeT is helpful as on some compilers size_t is distinct from a regular integer type and so overloading doesn't work.
+    // Casting to SlangSizeT works around this.
 #if SLANG_PTR_IS_64
     typedef int64_t    SlangInt;
     typedef uint64_t   SlangUInt;
+
+    typedef uint64_t   SlangSizeT;
 #else
     typedef int32_t    SlangInt;
     typedef uint32_t   SlangUInt;
+
+    typedef uint32_t   SlangSizeT;
 #endif
 
     typedef bool SlangBool;