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Fix GLAPIENTRY redefinition warning

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On a Unix system, if you define GLFW_INCLUDE_NONE and
GLFW_EXPOSE_NATIVE_GLX, then include glfw3.h and glfw3native.h, you will
get a redefinition warning for GLAPIENTRY.

The glfw3.h header defines GLAPIENTRY as a service for OpenGL related
headers that assume it's already defined.  However, glx.h includes gl.h,
which defines GLAPIENTRY unconditionally.

If not for Hyrum's law, the better solution would have been not to
define GLAPIENTRY if GLFW_INCLUDE_NONE is defined.

Fixes #2010
This commit is contained in:
Camilla Löwy 2022-03-15 17:51:57 +01:00
parent 3ee5031fd7
commit 535c3ce632
1 changed files with 10 additions and 0 deletions
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10
include/GLFW/glfw3native.h
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@ -111,12 +111,22 @@ extern "C" {
/* NSGL is declared by Cocoa.h */
#endif
#if defined(GLFW_EXPOSE_NATIVE_GLX)
/* This is a workaround for the fact that glfw3.h defines GLAPIENTRY because by
* default it also acts as an OpenGL header
* However, glx.h will include gl.h, which will define it unconditionally
*/
#undef GLAPIENTRY
#include <GL/glx.h>
#endif
#if defined(GLFW_EXPOSE_NATIVE_EGL)
#include <EGL/egl.h>
#endif
#if defined(GLFW_EXPOSE_NATIVE_OSMESA)
/* This is a workaround for the fact that glfw3.h defines GLAPIENTRY because by
* default it also acts as an OpenGL header
* However, osmesa.h will include gl.h, which will define it unconditionally
*/
#undef GLAPIENTRY
#include <GL/osmesa.h>
#endif