如上文所说，如果不修改，将会出现undefined symbol xxx 或者 找不到opencv_xxx的库的问题。
关于Opengl ES 版本问题
根据官方说明，需要Opengl ES 3.1 或者 Opengl ES 3.1+的版本，我这里遇到的问题是，如果版本比这个低，运行GPU版本的demo 的时候，会报错。 注意：rk的libmali-rk-midgard-t86x-r14p0版本就支持 Opengl ES 3.1及以上，现在rk已经更新了libmali-rk-midgard-t86x-r18p0，可以暂时不更新也可以用。因为一旦更新了gpu驱动，内核也必须更新，配套的文件系统也得更新。因为我 xxxxxxxxxxxxxx 踩过.
关于Opengl ES 版本查看问题，可以使用glxinfo，如果没有这个命令推荐安装。如果使用的ssh来运行glxinfo，保证启用X11-forwarding. 查看到的版本如下图(glxinfo|grep “OpenGL ES”)： opengles_ver
I20210417 17:49:08 4016 demo_run_graph_main_gpu.cc:58] Initialize the calculator graph. I20210417 17:49:08 4016 demo_run_graph_main_gpu.cc:62] Initialize the GPU. XIO: fatal IO error 11 (Resource temporarily unavailable) on X server "localhost:12.0" after 6 requests (6 known processed) with 0 events remaining.
/* ** Copyright (c) 2007-2016 The Khronos Group Inc. ** ** Permission is hereby granted, free of charge, to any person obtaining a ** copy of this software and/or associated documentation files (the ** "Materials"), to deal in the Materials without restriction, including ** without limitation the rights to use, copy, modify, merge, publish, ** distribute, sublicense, and/or sell copies of the Materials, and to ** permit persons to whom the Materials are furnished to do so, subject to ** the following conditions: ** ** The above copyright notice and this permission notice shall be included ** in all copies or substantial portions of the Materials. ** ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. */
/* Platform-specific types and definitions for egl.h * $Revision: 30994 $ on $Date: 2015-04-30 13:36:48 -0700 (Thu, 30 Apr 2015) $ * * Adopters may modify khrplatform.h and this file to suit their platform. * You are encouraged to submit all modifications to the Khronos group so that * they can be included in future versions of this file. Please submit changes * by sending them to the public Khronos Bugzilla (http://khronos.org/bugzilla) * by filing a bug against product "EGL" component "Registry". */
#include <KHR/khrplatform.h>
/* Macros used in EGL function prototype declarations. * * EGL functions should be prototyped as: * * EGLAPI return-type EGLAPIENTRY eglFunction(arguments); * typedef return-type (EXPAPIENTRYP PFNEGLFUNCTIONPROC) (arguments); * * KHRONOS_APICALL and KHRONOS_APIENTRY are defined in KHR/khrplatform.h */
/* The types NativeDisplayType, NativeWindowType, and NativePixmapType * are aliases of window-system-dependent types, such as X Display * or * Windows Device Context. They must be defined in platform-specific * code below. The EGL-prefixed versions of Native*Type are the same * types, renamed in EGL 1.3 so all types in the API start with "EGL". * * Khronos STRONGLY RECOMMENDS that you use the default definitions * provided below, since these changes affect both binary and source * portability of applications using EGL running on different EGL * implementations. */
/* EGL 1.2 types, renamed for consistency in EGL 1.3 */ typedef EGLNativeDisplayType NativeDisplayType; typedef EGLNativePixmapType NativePixmapType; typedef EGLNativeWindowType NativeWindowType;
/* Define EGLint. This must be a signed integral type large enough to contain * all legal attribute names and values passed into and out of EGL, whether * their type is boolean, bitmask, enumerant (symbolic constant), integer, * handle, or other. While in general a 32-bit integer will suffice, if * handles are 64 bit types, then EGLint should be defined as a signed 64-bit * integer type. */ typedef khronos_int32_t EGLint;
/* C++ / C typecast macros for special EGL handle values */ #if defined(__cplusplus) #define EGL_CAST(type, value) (static_cast<type>(value)) #else #define EGL_CAST(type, value) ((type) (value)) #endif
/* ** Copyright (c) 2007-2016 The Khronos Group Inc. ** ** Permission is hereby granted, free of charge, to any person obtaining a ** copy of this software and/or associated documentation files (the ** "Materials"), to deal in the Materials without restriction, including ** without limitation the rights to use, copy, modify, merge, publish, ** distribute, sublicense, and/or sell copies of the Materials, and to ** permit persons to whom the Materials are furnished to do so, subject to ** the following conditions: ** ** The above copyright notice and this permission notice shall be included ** in all copies or substantial portions of the Materials. ** ** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, ** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. ** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY ** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, ** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE ** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS. */
/* Platform-specific types and definitions for egl.h * $Revision: 30994 $ on $Date: 2015-04-30 13:36:48 -0700 (Thu, 30 Apr 2015) $ * * Adopters may modify khrplatform.h and this file to suit their platform. * You are encouraged to submit all modifications to the Khronos group so that * they can be included in future versions of this file. Please submit changes * by sending them to the public Khronos Bugzilla (http://khronos.org/bugzilla) * by filing a bug against product "EGL" component "Registry". */
#include <KHR/khrplatform.h>
/* Macros used in EGL function prototype declarations. * * EGL functions should be prototyped as: * * EGLAPI return-type EGLAPIENTRY eglFunction(arguments); * typedef return-type (EXPAPIENTRYP PFNEGLFUNCTIONPROC) (arguments); * * KHRONOS_APICALL and KHRONOS_APIENTRY are defined in KHR/khrplatform.h */
#if defined(MESA_EGL_NO_X11_HEADERS) && !defined(EGL_NO_X11) #warning "`MESA_EGL_NO_X11_HEADERS` is deprecated, and doesn't work with the unmodified Khronos header" #warning "Please use `EGL_NO_X11` instead, as `MESA_EGL_NO_X11_HEADERS` will be removed soon" #define EGL_NO_X11 #endif
/* The types NativeDisplayType, NativeWindowType, and NativePixmapType * are aliases of window-system-dependent types, such as X Display * or * Windows Device Context. They must be defined in platform-specific * code below. The EGL-prefixed versions of Native*Type are the same * types, renamed in EGL 1.3 so all types in the API start with "EGL". * * Khronos STRONGLY RECOMMENDS that you use the default definitions * provided below, since these changes affect both binary and source * portability of applications using EGL running on different EGL * implementations. */
/* EGL 1.2 types, renamed for consistency in EGL 1.3 */ typedef EGLNativeDisplayType NativeDisplayType; typedef EGLNativePixmapType NativePixmapType; typedef EGLNativeWindowType NativeWindowType;
/* Define EGLint. This must be a signed integral type large enough to contain * all legal attribute names and values passed into and out of EGL, whether * their type is boolean, bitmask, enumerant (symbolic constant), integer, * handle, or other. While in general a 32-bit integer will suffice, if * handles are 64 bit types, then EGLint should be defined as a signed 64-bit * integer type. */ typedef khronos_int32_t EGLint;
/* C++ / C typecast macros for special EGL handle values */ #if defined(__cplusplus) #define EGL_CAST(type, value) (static_cast<type>(value)) #else #define EGL_CAST(type, value) ((type) (value)) #endif
