在CMake中使用ImageMagick库的ImageWand组件

Question

我用C语言编程，我想使用ImageMagick库，但有些函数无法解决。

这是我的cMakeList.txt文件：

cmake_minimum_required(VERSION 3.3)
project(WebServer)

set(CMAKE_C_COMPILER "/usr/bin/gcc")

set(SOURCE_FILES io.c server.c lock_fcntl.c sig_handler.c thread_job.c    msg_parser.c)
set(LIB http-parser-master/http_parser.c )

set(CMAKE_USE_PTHREADS_INIT true)
set(CMAKE_USE_PTHREADS_INIT ON)

find_package(Threads REQUIRED)
find_package(ImageMagick COMPONENTS ImageWand)

include_directories(header)
include_directories(http-parser-master)

#include_directories(/usr/local/include/ImageMagick-7/MagickWand)
include_directories(${ImageMagick_INCLUDE_DIRS})

add_executable(server ${SOURCE_FILES} ${LIB})
add_executable(client client.c io.c)
add_executable(main main.c io.c)

target_link_libraries(main ${ImageMagick_LIBRARIES})
target_link_libraries(server Threads::Threads)

这是源代码main.c：

#include <ImageMagick-7/MagickWand/MagickWand.h>
#include "basic.h"

void convert_image(char *path, float quality_factor, char *out) {

    int width, height;
    MagickWand *n_wand = NULL;

    MagickWandGenesis();

    m_wand = (struct MagickWand *) NewMagickWand();


    MagickReadImage(m_wand,"logo:");

    width = MagickGetImageWidth(m_wand);
    height = MagickGetImageHeight(m_wand);

    if((width /= 2) < 1)width = 1;
    if((height /= 2) < 1)height = 1;

    MagickResizeImage(m_wand,width,height,LanczosFilter,1);

    MagickSetImageCompressionQuality(m_wand,95);

    MagickWriteImage(m_wand,"logo_resize.jpg");

   if(m_wand)m_wand = (struct MagickWand *) DestroyMagickWand(m_wand);

    MagickWandTerminus();
}

仅解析MagickWandGenesis()和MagickWandTerminus()。库的安装已正确结束。如何解决？

编辑：

运行时，我得到错误：

/usr/local/include/ImageMagick-7/MagickWand/MagickWand.h:29:40: fatal     error: MagickCore/magick-config.h: File o directory non esistente
 #  include "MagickCore/magick-config.h"
                                    ^
compilation terminated.
make[3]: *** [CMakeFiles/main.dir/main.c.o] Errore 1
make[2]: *** [CMakeFiles/main.dir/all] Errore 2
make[1]: *** [CMakeFiles/main.dir/rule] Errore 2
make: *** [main] Errore 2

我尝试了这里显示的解决方案，但不起作用：ImageMagick No such file or directory

Answer 1

库结构是这样的：

ImageMagick-7
    ├── MagickCore
    │   ├── magick-config.h
    |
    └── MagickWand
        ├── MagickWand.h

MagickWand.h在MagickCore中包含一些头文件。我修复了用include_directories(/usr/local/include/ImageMagick-7)替换include_directories(${ImageMagick_INCLUDE_DIRS})的问题。我不知道为什么，但如果我打印${ImageMagick_INCLUDE_DIRS}，这是没有设置的。