rk3568 egl 工作不正常

alfredng

我写了一个测试程序
```
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <stdio.h>

int main(int argc, char const *argv[])
{
  printf("aaa\n");
  static const int MAX_DEVICES = 1;
  EGLDeviceEXT eglDevs[MAX_DEVICES];
  EGLint numDevices;
printf("bbb\n");
  PFNEGLQUERYDEVICESEXTPROC eglQueryDevicesEXT =
      (PFNEGLQUERYDEVICESEXTPROC)
          eglGetProcAddress("eglQueryDevicesEXT");
printf("ccc\n");
  eglQueryDevicesEXT(MAX_DEVICES, eglDevs, &numDevices);

  printf("Detected %d devices\n", numDevices);

  PFNEGLGETPLATFORMDISPLAYEXTPROC eglGetPlatformDisplayEXT =
      (PFNEGLGETPLATFORMDISPLAYEXTPROC)
          eglGetProcAddress("eglGetPlatformDisplayEXT");

  void *eglDpy = eglGetPlatformDisplayEXT(EGL_PLATFORM_DEVICE_EXT,
                                          eglDevs[0], 0);
  if (eglDpy==EGL_NO_DISPLAY)
  {
    printf("Detected  devices\n");
  }

  // ...
  return 0;
}

```
我发现eglQueryDevicesEXT(MAX_DEVICES, eglDevs, &numDevices); 崩溃，这个是什么问题，是不是rk不支持直接egl这样用？在电脑和非rk平台都是正常的