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我想在我的应用程序中使用日志记录。在我制作的 CMake 文件（相关部分见下文）中，一切运行顺利，gflags 似乎安装正常。但是，在编译 glog 时，我收到错误消息： fatal error: 'gflags/gflags.h' file not found

在生成的代码中找到了丢失的文件，所以我猜想某些开关/选项的设置方式不正确。或者，我从错误的站点下载文件的另一件事。（我找到并下载了几个带路径的 glog 文件，它们都向我显示错误消息，但有不同的消息。）我该如何解决？（我更喜欢非手动补丁）

# Download and install GoogleFlags
ExternalProject_Add(
gflags
URL https://github.com/gflags/gflags/archive/master.zip
PREFIX ${CMAKE_CURRENT_BINARY_DIR}/gflags
INSTALL_COMMAND ""
)

# Create a libgflags target to be used as a dependency by test programs
add_library(libgflags IMPORTED STATIC GLOBAL)
add_dependencies(libgflags gflags)

# Set gflag properties
ExternalProject_Get_Property(gflags source_dir binary_dir)
set_target_properties(libgflags PROPERTIES
"IMPORTED_LOCATION" "${binary_dir}/libgflags.a"
"IMPORTED_LINK_INTERFACE_LIBRARIES" "${CMAKE_THREAD_LIBS_INIT}"
)
include_directories("${source_dir}/include")

# Download and install GoogleLog
ExternalProject_Add(
glog
URL https://github.com/emzeat/google-glog/archive/master.zip
PREFIX ${CMAKE_CURRENT_BINARY_DIR}/glog
INSTALL_COMMAND ""
)

# Create a libglog target to be used as a dependency by test programs
add_library(libglog IMPORTED STATIC GLOBAL)
add_dependencies(libglog glog)

# Set glog properties
ExternalProject_Get_Property(glog source_dir binary_dir)
set_target_properties(libglog PROPERTIES
"IMPORTED_LOCATION" "${binary_dir}/libglog.a"
"IMPORTED_LINK_INTERFACE_LIBRARIES" "${CMAKE_THREAD_LIBS_INIT}"
#    "INTERFACE_INCLUDE_DIRECTORIES" "${source_dir}/include"
)
# I couldn't make it work with INTERFACE_INCLUDE_DIRECTORIES
include_directories("${source_dir}/include")
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