gstreamer 链接错误(使用 gstglfilter 时)
gstreamer linking error (when using gstglfilter)
当我使用 CMake 构建我的 gstreamer 项目时,我使用以下 CmakeLists.txt:
cmake_minimum_required(VERSION 3.16)
set(CMAKE_CXX_STANDARD 20)
include(FetchContent)
project(someproject)
find_package(PkgConfig REQUIRED)
pkg_check_modules(GST REQUIRED gstreamer-1.0>=1.4
gstreamer-sdp-1.0>=1.4
gstreamer-video-1.0>=1.4
gstreamer-plugins-base-1.0>=1.4
gstreamer-app-1.0>=1.4
gstreamer-gl-1.0>=1.4)
#some other calls to find_package
add_library(someproject "")
#add source directories
target_include_directories(GUI_lib PUBLIC include "${OTHER_FIND_PACKAGE_INCLUDE_DIRS}"
"${GST_INCLUDE_DIRS}")
target_link_libraries(someproject PUBLIC "${OTHER_FIND_PACKAGE_LIBS}" "${GST_LIBRARIES}" -lGL -lepoxy)
这会导致以下错误:
in function `drawCallback(_GstElement*, unsigned int, unsigned int, unsigned int, void*)':
undefined reference to `gst_gl_filter_get_type'
undefined reference to `gst_gl_filter_draw_fullscreen_quad'
我已经搜索了我的 gstreamer 安装并确认存在一个使用以下代码段(星号表示强调)定义这些符号的共享库:
% readelf -s --wide /usr/lib/gstreamer-1.0/libgstopengl.so | rg gl_filter
121: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_render_to_target_with_shader
* 242: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_draw_fullscreen_quad
305: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_add_rgba_pad_templates
421: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_render_to_target
* 447: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_get_type
470: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_filter_texture
因此,我将以下内容添加到我的 CMake 文件中:
add_library(gstopenglextras SHARED IMPORTED)
set_target_properties(gstopenglextras PROPERTIES
IMPORTED_LOCATION "/usr/lib/gstreamer-1.0/libgstopengl.so")
我还将 target_link_libraries
调用更改为:
target_link_libraries(someproject PUBLIC "${OTHER_FIND_PACKAGE_LIBS}" gstopenglextras "${GST_LIBRARIES}" -lGL -lepoxy)
现在我收到以下链接器错误:
/usr/bin/ld: undefined reference to symbol 'gst_gl_filter_get_type'
/usr/bin/ld: /usr/lib/libgstgl-1.0.so.0: error adding symbols: DSO missing from command line
我已经阅读了一些关于循环依赖的资料,并且尝试在 gstopenglextras
之前添加 "${GST_LIBRARIES}"
。但是,这不会改变错误。
有什么想法吗?
target_link_libraries(
someproject
PUBLIC
"${OTHER_FIND_PACKAGE_LIBS}"
gstopenglextras
"${GST_LIBRARIES}"
-lGL
-lepoxy
gstgl-1.0
glib-2.0
gmodule-2.0
)
是解决此问题的电话。
当我使用 CMake 构建我的 gstreamer 项目时,我使用以下 CmakeLists.txt:
cmake_minimum_required(VERSION 3.16)
set(CMAKE_CXX_STANDARD 20)
include(FetchContent)
project(someproject)
find_package(PkgConfig REQUIRED)
pkg_check_modules(GST REQUIRED gstreamer-1.0>=1.4
gstreamer-sdp-1.0>=1.4
gstreamer-video-1.0>=1.4
gstreamer-plugins-base-1.0>=1.4
gstreamer-app-1.0>=1.4
gstreamer-gl-1.0>=1.4)
#some other calls to find_package
add_library(someproject "")
#add source directories
target_include_directories(GUI_lib PUBLIC include "${OTHER_FIND_PACKAGE_INCLUDE_DIRS}"
"${GST_INCLUDE_DIRS}")
target_link_libraries(someproject PUBLIC "${OTHER_FIND_PACKAGE_LIBS}" "${GST_LIBRARIES}" -lGL -lepoxy)
这会导致以下错误:
in function `drawCallback(_GstElement*, unsigned int, unsigned int, unsigned int, void*)':
undefined reference to `gst_gl_filter_get_type'
undefined reference to `gst_gl_filter_draw_fullscreen_quad'
我已经搜索了我的 gstreamer 安装并确认存在一个使用以下代码段(星号表示强调)定义这些符号的共享库:
% readelf -s --wide /usr/lib/gstreamer-1.0/libgstopengl.so | rg gl_filter
121: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_render_to_target_with_shader
* 242: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_draw_fullscreen_quad
305: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_add_rgba_pad_templates
421: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_render_to_target
* 447: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_get_type
470: 0000000000000000 0 FUNC GLOBAL DEFAULT UND gst_gl_filter_filter_texture
因此,我将以下内容添加到我的 CMake 文件中:
add_library(gstopenglextras SHARED IMPORTED)
set_target_properties(gstopenglextras PROPERTIES
IMPORTED_LOCATION "/usr/lib/gstreamer-1.0/libgstopengl.so")
我还将 target_link_libraries
调用更改为:
target_link_libraries(someproject PUBLIC "${OTHER_FIND_PACKAGE_LIBS}" gstopenglextras "${GST_LIBRARIES}" -lGL -lepoxy)
现在我收到以下链接器错误:
/usr/bin/ld: undefined reference to symbol 'gst_gl_filter_get_type'
/usr/bin/ld: /usr/lib/libgstgl-1.0.so.0: error adding symbols: DSO missing from command line
我已经阅读了一些关于循环依赖的资料,并且尝试在 gstopenglextras
之前添加 "${GST_LIBRARIES}"
。但是,这不会改变错误。
有什么想法吗?
target_link_libraries(
someproject
PUBLIC
"${OTHER_FIND_PACKAGE_LIBS}"
gstopenglextras
"${GST_LIBRARIES}"
-lGL
-lepoxy
gstgl-1.0
glib-2.0
gmodule-2.0
)
是解决此问题的电话。