Unexpected Struct while using GPGME in C++ Application

问题

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 problem:

I dowloaded the dev package for my debian system. I told my compiler how to find the library. Just to see if I 'm able to initialize the library (mentioned here) I try to execute the following code..:

//--- Main.cpp---

#include <locale.h>
#include <gpgme.h> 

int main(){
       /* Initialize the locale environment.  */
  setlocale (LC_ALL, "");
  gpgme_check_version (NULL);
  gpgme_set_locale (NULL, LC_CTYPE, setlocale (LC_CTYPE, NULL));
#ifdef LC_MESSAGES
  gpgme_set_locale (NULL, LC_MESSAGES, setlocale (LC_MESSAGES, NULL));
#endif
    return 0;
}

the line

gpgme_set_locale (NULL, LC_CTYPE, setlocale (LC_CTYPE, NULL));

is underlined in red by qt creator. The message is

expected token ';' got 'struct'

But why?

JFYI

As a synopsys of my earlier problem, my CMakeLists look like this:

My main CMakeLists.txt in the root directory of my project:

//...
include(FeatureSummary)

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
find_package(Gpgme)

# Additional include directories
INCLUDE_DIRECTORIES(${CMAKE_SOURCE_DIR}                  
                    ${GPGME_INCLUDES}
)

ADD_SUBDIRECTORY(${CMAKE_SOURCE_DIR}/application/framework/impl)

And the CMakeLists.txt in application/framework/impl subdirectory:

# Define name of component
SET(COMPONENT_NAME framework)

# Define set of source files for library
SET(comp_src
      //... well, the sources
)

add_executable(${COMPONENT_NAME} ${comp_src})
target_link_libraries(${COMPONENT_NAME} ${GPGME_VANILLA_LIBRARIES})

UPDATE

If I uncommend the line

//gpgme_check_version (NULL);

the message disappears. I checked the documentation. The signature of the method seams to be valid. Might there be something wrong with the library version I'm using?

EDIT:

This is not a compiler error, but just a red mark given by the qt creator. I would assume it should be caused by a typo or something. But I can't see any typo. Moreover the application does compile and run even if I didn't comment out the check_version line.

来源：https://stackoverflow.com/questions/34614154/unexpected-struct-while-using-gpgme-in-c-application

标签

c++

gpgme