fix(build): Exclude GameMath from VC6 and fix ACos typo in BaseType.h

- Guard gamemath.cmake and link with NOT IS_VS6_BUILD (VC6 lacks long long, stdint.h)
- Guard gmath.h include in wwmath.h with _MSC_VER >= 1300 check
- Fix ACos -> Acos case mismatch in BaseType.h (3 call sites)

Author: Okladnoj

CMakeLists.txt

@@ -64,7 +64,9 @@ endif()
 
 include(cmake/config.cmake)
 include(cmake/gamespy.cmake)
-include(cmake/gamemath.cmake)
+if (NOT IS_VS6_BUILD)
+    include(cmake/gamemath.cmake)
+endif()
 include(cmake/lzhl.cmake)
 
 if (IS_VS6_BUILD)

Core/Libraries/Include/Lib/BaseType.h

@@ -270,7 +270,7 @@ inline Real Coord2D::toAngle() const
 	else if (c > 1.0)
 		c = 1.0;
 
-	Real value = (Real)WWMath::ACos( (Real)c );
+	Real value = (Real)WWMath::Acos( (Real)c );
 
 	// Determine sign by checking Z component of dir cross vector
 	// Note this is assumes 2D, and is identical to dotting the perpendicular of v with dir
@@ -295,7 +295,7 @@ inline Real Coord2D::toAngle() const
 	else if (c > 1.0f)
 		c = 1.0f;
 
-	return y < 0.0f ? -WWMath::ACos(c) : WWMath::ACos(c);
+	return y < 0.0f ? -WWMath::Acos(c) : WWMath::Acos(c);
 #endif
 }
 

Core/Libraries/Source/WWVegas/WWMath/CMakeLists.txt

@@ -89,8 +89,11 @@ target_link_libraries(core_wwmath PRIVATE
     core_wwcommon
     corei_always
     core_wwsaveload
-    gamemath
 )
 
+if (NOT IS_VS6_BUILD)
+    target_link_libraries(core_wwmath PRIVATE gamemath)
+endif()
+
 # @todo Test its impact and see what to do with the legacy functions.
 #add_compile_definitions(core_wwmath PUBLIC ALLOW_TEMPORARIES) # Enables legacy math with "temporaries"

Core/Libraries/Source/WWVegas/WWMath/wwmath.h

@@ -39,11 +39,14 @@
 #include "always.h"
 #include <math.h>
 #include <float.h>
-#include "gmath.h"
 #include <assert.h>
 
+// TheSuperHackers @fix VC6 does not support long long or <stdint.h> required by GameMath (gmath.h).
+#if !(defined(_MSC_VER) && _MSC_VER < 1300)
+#include "gmath.h"
 #ifdef RETAIL_COMPATIBLE_CRC
 #define USE_DETERMINISTIC_MATH
+#endif
 #endif
 
  /*