Fixed the build for web using CMake. (#1452)

* Fixed the build for web using CMake.

I found that the build for me was failing and I added some if defined checks in the core.c file where the glfwSetWindowAttrib was used. (error: implicit declaration of function 'glfwSetWindowAttrib' is invalid in C99 [-Werror,-Wimplicit-function-declaration])

I also changed some values in the toolchain file so that it correctly uses the .bat files when on windows.

* Cleaned up the additional variables (they are not important)

* Added more improvements to cmakelists

Added the option to use the system provided Emscripten toolchain to be more uniform with other libraries.

Fixed and issue which prevented example being built from cmake and also building with html extensions properly.

* Fixed ENUM to STRING because of a missed warning

1 files changed, 16 insertions, 0 deletions

diff --git a/src/core.c b/src/core.c
index 12f76609..5ee78779 100644
--- a/src/core.c
+++ b/src/core.c
@@ -1133,15 +1133,19 @@ void SetWindowState(unsigned int flags)
     // State change: FLAG_WINDOW_RESIZABLE
     if (((CORE.Window.flags & FLAG_WINDOW_RESIZABLE) != (flags & FLAG_WINDOW_RESIZABLE)) && ((flags & FLAG_WINDOW_RESIZABLE) > 0)) 
     {
+#if defined(PLATFORM_DESKTOP)
         glfwSetWindowAttrib(CORE.Window.handle, GLFW_RESIZABLE, GLFW_TRUE);
         CORE.Window.flags |= FLAG_WINDOW_RESIZABLE;
+#endif
     }
     
     // State change: FLAG_WINDOW_UNDECORATED
     if (((CORE.Window.flags & FLAG_WINDOW_UNDECORATED) != (flags & FLAG_WINDOW_UNDECORATED)) && (flags & FLAG_WINDOW_UNDECORATED)) 
     {
+#if defined(PLATFORM_DESKTOP)
         glfwSetWindowAttrib(CORE.Window.handle, GLFW_DECORATED, GLFW_FALSE);
         CORE.Window.flags |= FLAG_WINDOW_UNDECORATED;
+#endif
     }
 
     // State change: FLAG_WINDOW_HIDDEN
@@ -1168,15 +1172,19 @@ void SetWindowState(unsigned int flags)
     // State change: FLAG_WINDOW_UNFOCUSED
     if (((CORE.Window.flags & FLAG_WINDOW_UNFOCUSED) != (flags & FLAG_WINDOW_UNFOCUSED)) && ((flags & FLAG_WINDOW_UNFOCUSED) > 0)) 
     {
+#if defined(PLATFORM_DESKTOP)
         glfwSetWindowAttrib(CORE.Window.handle, GLFW_FOCUS_ON_SHOW, GLFW_FALSE);
         CORE.Window.flags |= FLAG_WINDOW_UNFOCUSED;
+#endif
     }
     
     // State change: FLAG_WINDOW_TOPMOST
     if (((CORE.Window.flags & FLAG_WINDOW_TOPMOST) != (flags & FLAG_WINDOW_TOPMOST)) && ((flags & FLAG_WINDOW_TOPMOST) > 0))
     {
+#if defined(PLATFORM_DESKTOP)
         glfwSetWindowAttrib(CORE.Window.handle, GLFW_FLOATING, GLFW_TRUE);
         CORE.Window.flags |= FLAG_WINDOW_TOPMOST;
+#endif
     }
     
     // State change: FLAG_WINDOW_ALWAYS_RUN
@@ -1234,15 +1242,19 @@ void ClearWindowState(unsigned int flags)
     // State change: FLAG_WINDOW_RESIZABLE
     if (((CORE.Window.flags & FLAG_WINDOW_RESIZABLE) > 0) && ((flags & FLAG_WINDOW_RESIZABLE) > 0))
     {
+#if defined(PLATFORM_DESKTOP)
         glfwSetWindowAttrib(CORE.Window.handle, GLFW_RESIZABLE, GLFW_FALSE);
         CORE.Window.flags &= ~FLAG_WINDOW_RESIZABLE;
+#endif
     }
     
     // State change: FLAG_WINDOW_UNDECORATED
     if (((CORE.Window.flags & FLAG_WINDOW_UNDECORATED) > 0) && ((flags & FLAG_WINDOW_UNDECORATED) > 0)) 
     {
+#if defined(PLATFORM_DESKTOP)
         glfwSetWindowAttrib(CORE.Window.handle, GLFW_DECORATED, GLFW_TRUE);
         CORE.Window.flags &= ~FLAG_WINDOW_UNDECORATED;
+#endif
     }
 
     // State change: FLAG_WINDOW_HIDDEN
@@ -1267,15 +1279,19 @@ void ClearWindowState(unsigned int flags)
     // State change: FLAG_WINDOW_UNFOCUSED
     if (((CORE.Window.flags & FLAG_WINDOW_UNFOCUSED) > 0) && ((flags & FLAG_WINDOW_UNFOCUSED) > 0)) 
     {
+#if defined(PLATFORM_DESKTOP)
         glfwSetWindowAttrib(CORE.Window.handle, GLFW_FOCUS_ON_SHOW, GLFW_TRUE);
         CORE.Window.flags &= ~FLAG_WINDOW_UNFOCUSED;
+#endif
     }
     
     // State change: FLAG_WINDOW_TOPMOST
     if (((CORE.Window.flags & FLAG_WINDOW_TOPMOST) > 0) && ((flags & FLAG_WINDOW_TOPMOST) > 0))
     {
+#if defined(PLATFORM_DESKTOP)
         glfwSetWindowAttrib(CORE.Window.handle, GLFW_FLOATING, GLFW_FALSE);
         CORE.Window.flags &= ~FLAG_WINDOW_TOPMOST;
+#endif
     }
     
     // State change: FLAG_WINDOW_ALWAYS_RUN