From 97e0ffde9f95b9b805a6811b42fb9fac02f82b06 Mon Sep 17 00:00:00 2001
From: twinaphex <libretro@gmail.com>
Date: Wed, 8 Nov 2017 00:53:57 +0100
Subject: [PATCH] Buildfix for iOS

---
 gfx/drivers/gl.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gfx/drivers/gl.c b/gfx/drivers/gl.c
index 1e604f5c93..f3e32fce03 100644
--- a/gfx/drivers/gl.c
+++ b/gfx/drivers/gl.c
@@ -1075,6 +1075,7 @@ static struct video_shader *gl_get_current_shader(void *data)
    return shader_info.data;
 }
 
+#ifdef HAVE_GL_ASYNC_READBACK
 static void gl_pbo_async_readback(gl_t *gl)
 {
    glBindBuffer(GL_PIXEL_PACK_BUFFER,
@@ -1102,6 +1103,7 @@ static void gl_pbo_async_readback(gl_t *gl)
 
    glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
 }
+#endif
 
 static INLINE void gl_draw_texture(gl_t *gl, video_frame_info_t *video_info)
 {
@@ -1388,10 +1390,12 @@ static bool gl_frame(void *data, const void *frame,
             GL_RGBA, GL_UNSIGNED_BYTE, gl->readback_buffer_screenshot);
    }
 #ifdef HAVE_MENU
+#ifdef HAVE_GL_ASYNC_READBACK
    /* Don't readback if we're in menu mode. */
    else if (gl->pbo_readback_enable && !gl->menu_texture_enable)
       gl_pbo_async_readback(gl);
 #endif
+#endif
 #endif
 
    /* Disable BFI during fast forward, slow-motion,