模块 opencv_sfm 已禁用，因为未找到以下依赖项：Glog/Gflags - 均已检测到

Question

我无法使用 cmake 为 opencv 编译 sfm 模块。

如下日志显示cmake同时找到了glog和gflags，但是编译失败

Glog:   YES
freetype2:   NO
harfbuzz:    NO
Julia not found. Not compiling Julia Bindings. 
Module opencv_ovis disabled because OGRE3D was not found
No preference for use of exported gflags CMake configuration set, and no hints for include/library directories provided. Defaulting to preferring an installed/exported gflags CMake configuration if available.
Found installed version of gflags: D:/ceres/gflags/out/build/x64-Debug
Detected gflags version: 2.2.2
WARNING: Target "cmTC_9b54b" requests linking to directory "D:/ceres/glog/out/build/x64-Debug".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "cmTC_9b54b" requests linking to directory "D:/ceres/glog/out/build/x64-Debug".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "cmTC_9b54b" requests linking to directory "D:/ceres/glog/out/build/x64-Debug".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "cmTC_9b54b" requests linking to directory "D:/ceres/glog/out/build/x64-Debug".  Targets may link only to libraries.  CMake is dropping the item.
Checking SFM deps... FALSE
Module opencv_sfm disabled because the following dependencies are not found: Glog/Gflags

Tesseract:   NO
Allocator metrics storage type: 'long long'
Registering hook 'INIT_MODULE_SOURCES_opencv_dnn': D:/opencv-4.5.0/modules/dnn/cmake/hooks/INIT_MODULE_SOURCES_opencv_dnn.cmake
opencv_dnn: filter out cuda4dnn source code
CMake Warning at D:/opencv-4.5.0/cmake/OpenCVModule.cmake:679 (message):
  Unexpected include: D:/opencv-4.5.0/build/downloads/xfeatures2d
  (module=opencv_xfeatures2d)
Call Stack (most recent call first):
  D:/opencv-4.5.0/cmake/OpenCVModule.cmake:710 (ocv_target_include_modules)
  D:/opencv_contrib/modules/xfeatures2d/CMakeLists.txt:17 (ocv_module_include_directories)

这是来自 "opencv_contrib\modules\sfm\CmakeLists.txt" 的代码片段，它导致了之前的输出：

if((gflags_FOUND OR GFLAGS_FOUND OR GFLAGS_INCLUDE_DIRS) AND (glog_FOUND OR GLOG_FOUND OR GLOG_INCLUDE_DIRS))
  set(_fname "${CMAKE_CURRENT_BINARY_DIR}/test_sfm_deps.cpp")
  file(WRITE "${_fname}" "#include <glog/logging.h>\n#include <gflags/gflags.h>\n int main() { (void)(0); return 0; }\n")

  // This is reason of the fail
  try_compile(SFM_DEPS_OK "${CMAKE_BINARY_DIR}" "${_fname}"
      CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:STRING=${GLOG_INCLUDE_DIRS};${GFLAGS_INCLUDE_DIRS}"
      LINK_LIBRARIES ${GLOG_LIBRARIES} ${GFLAGS_LIBRARIES}
      OUTPUT_VARIABLE OUTPUT
  )
  file(REMOVE "${_fname}")
  message(STATUS "Checking SFM deps... ${SFM_DEPS_OK}")
else()
  set(SFM_DEPS_OK FALSE)
endif()

if(NOT HAVE_EIGEN OR NOT SFM_DEPS_OK)
  set(DISABLE_MSG "Module opencv_sfm disabled because the following dependencies are not found:")
  if(NOT HAVE_EIGEN)
    set(DISABLE_MSG "${DISABLE_MSG} Eigen")
  endif()
  if(NOT SFM_DEPS_OK)
    set(DISABLE_MSG "${DISABLE_MSG} Glog/Gflags")
  endif()
  message(STATUS ${DISABLE_MSG})
  ocv_module_disable(sfm)
endif()

我认为cmake 中的gflags 和glog 路径有问题。我尝试了更多变体。 Here is the current settings Most of them are set based on Ceres Solver documentation.

配置：

OpenCV 4.5.0
OpenCV-contrib 4.5.0
glog 0.4.0
gflags 2.2.2
Ceres 求解器 2.0.0
本征 3.3.9
CMake 3.9.12
Windows 10

类似问题：

Module opencv_sfm disabled because the following dependencies are not found: Glog/Gflags #8536 - 仅针对 Ubuntu 解决。
How can I only install some modules from opencv after make install? - 删除构建文件夹没有帮助。
building opencv with sfm module issues - 在这里他建议下载所有部分的旧版本。

Answer 1

我在 cmake 中的 glog 参数设置不正确。

正确的设置如下：

glog_DIR: 构建在哪里。应该有glog-config.cmake。路径：glog/out/build/x64-Debug
GLOG_LIBRARIES：安装位置。 glogd.lib 的路径。路径：glog/out/install/x64-Debug/lib/glogd.lib
GLOG_INCLUDE_DIR：安装位置。应该有名为 glog 的文件夹。路径：glog/out/install/x64-Debug/include

模块 opencv_sfm 已禁用，因为未找到以下依赖项：Glog/Gflags - 均已检测到

Module opencv_sfm disabled because the following dependencies are not found: Glog/Gflags - both are detected

opencv

cmake

gflags

glog

opencv-contrib