问题描述
我想在我的C ++应用程序中使用GPGME来生成密钥和加密。但是，在尝试开始时，我遇到了一个问题：
我下载了dev包的debian系统。现在我想告诉我的编译器（gcc在Qt Creator）在哪里使用cmake找到库使用。但我不知道如何添加 gpgme-config --cflags --libs 到我的编译器标志。这不起作用：
SET（CMAKE_CXX_FLAGS$ {CMAKE_CXX_FLAGS}`gpgme-config --cflags --libs` ）
当我尝试构建应用程序时，编译器找不到 gpgme -config ：
c ++：错误：$（gpgme-config：找不到文件或目录
c ++：错误：无法识别的命令行选项'--cflags'
c ++：错误：无法识别的命令行选项'--libs）'
无论如何执行 gpgme-config --cflags --libs 在命令行上给我一个结果：
-L / usr / lib / x86_64-linux-gnu -lgpgme -lassuan -lgpg-error
我知道文档还提到Automake和libtool，使这个过程更容易。但我之前都没有使用Automake或libtool。
UPDATE：
$ b
我也试图使用FindGpgme.cmake文件为GPGME。但我使用的几个其他cmake文件，我也下载了。我把它们放在与FindGpgme.cmake相同的目录中。找到了主要的cmake文件（FindGpgme.cmake），但是MacroEnsureVersion和MacroBoolTo01没有。我对我的CMakeLists.txt变化如下：
包括：（cmake_modules / FindGpgme.cmake）
find_package（GPGME ）
我在FindGpgme.cmake中尝试了其他文件的相对路径和绝对路径。同样的问题 - cmake找不到它们。我的第二个尝试是用的。错误是：
在cmake_modules CMake的错误/ FindGpgme.cmake：376（set_package_properties）：
未知的CMake命令 set_package_properties。
调用堆栈（最近调用的第一个）：
CMakeLists.txt：7（include）
$ b b
我完全没有胶水如何解决 set_package_properties 问题。
UPDATE 2
我添加了
code> include（FeatureSummary）
到我的CMakeLists.txt。现在我得到以下错误：
即使消息描述的接缝非常详细，我不知道如何FindGpgme.cmake添加到 CMAKE_MODULE_PATH 或如何请求添加前缀到 CMAKE_PREFIX_PATH 。 dev包是绝对安装的（使用包管理器）
我建议使用一个正确的CMake查找脚本安装GPGME：
示例：
然后在你的CMake代码中进行类似的操作（未测试）：
find_package（GPGME）
include_directories（$ {GPGME_INCLUDES}）
target_link_libraries（YOURTARGET $ {GPGME_VANILLA_LIBRARIES）
I would like to use GPGME for key generation and encryption in my C++ application. However, while trying to get started, I got stuck with a problems:
I dowloaded the dev package for my debian system. Now I would like to tell my compiler (gcc in Qt Creator) where to find the library with cmake using the tool mentioned in the documentation. But I don't know how to add gpgme-config --cflags --libs to my compiler flags. This didn't work:
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} `gpgme-config --cflags --libs` ")
When I try to build the app the compiler can't find gpgme-config:
c++: error: $(gpgme-config: File or Directory not found
c++: error: unrecognized command line option ‘--cflags’
c++: error: unrecognized command line option ‘--libs)’
Anyway executing gpgme-config --cflags --libs on command line DOES give me a result:
-L/usr/lib/x86_64-linux-gnu -lgpgme -lassuan -lgpg-error
I know the documentation also mentions Automake and libtool to make this process easier. But I neither used Automake or libtool before.
UPDATE:
I also tried to use a FindGpgme.cmake file for GPGME. But the first file I used required several other cmake files, which I also downloaded. I put them in the same directory as FindGpgme.cmake. The main cmake file (FindGpgme.cmake) was found, but MacroEnsureVersion and MacroBoolTo01 not. My change to my CMakeLists.txt was the following:
include(cmake_modules/FindGpgme.cmake)
find_package(Gpgme)
I tried relative and absolute path to the other files in FindGpgme.cmake. Same problem - cmake can't find them. My second try was with the file I found on gitweb. The error was:
CMake Error at cmake_modules/FindGpgme.cmake:376 (set_package_properties):
Unknown CMake command "set_package_properties".
Call Stack (most recent call first):
CMakeLists.txt:7 (include)
I have absolutely no glue how to fix that set_package_properties problem.
UPDATE 2
I added
include(FeatureSummary)
to my CMakeLists.txt as proposed by kfunk. Now I get the following error:
Even the message description seams pretty detailed I don't know how to add the FindGpgme.cmake to CMAKE_MODULE_PATH or how to add the requested prefix to CMAKE_PREFIX_PATH. The dev package however is definitely installed (using package manager)
I'd suggest to use a proper CMake find script to look up the GPGME installation:
Example here: https://quickgit.kde.org/?p=kwallet.git&a=blob&h=7a092104ba0604b0606c4662750b8b32c5c3e2c6&f=cmake%2FFindGpgme.cmake&o=plain
Then something like this in your CMake code (untested):
find_package(Gpgme)
include_directories(${GPGME_INCLUDES})
target_link_libraries(YOURTARGET ${GPGME_VANILLA_LIBRARIES)
这篇关于在Debian的C ++应用程序中使用GPGME的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！