Graphviz - 无法加载gvplugin_pango.dll

Question

我试图在Windows中从CLion运行graphviz作为库.我花了很长时间才走到这一步,我希望这是最后的障碍.当我运行程序时,我看到以下警告,没有图表

Warning: Could not load "C:\Program Files (x86)\Graphviz2.38\bin\gvplugin_pango.dll" - can't open the module

我正在运行CLion,MinGW 3.22作为工具链.CmakeLists和main.c如下.不幸的是我无法注册graphviz论坛所以我希望这里有人可能有一些建议.到目前为止我已经尝试过 -

• 安装和使用mingw-64
• 安装旧版GraphViz(2.28,当前为2.38)
• 在cmakelists.txt中包含gvplugin_pango库
• 更改Graphviz文件夹的权限以允许完全访问Everyone,测试点-c并正常工作
• 设置GVBINDIR env变量以明确指向2.38安装
• 尝试在Cmakelists.txt中设置m32(不是100%我正确地做了这个)

的CMakeLists.txt

cmake_minimum_required(VERSION 3.6)
project(Learning)

set(CMAKE_CXX_FLAGS "${CMAKE_C_FLAGS}")
set(GRAPHVIZ_INCLUDE_DIR "C:/Program Files (x86)/Graphviz2.38/include/graphviz")
set(GRAPHVIZ_LIB_DIR "C:/Program Files (x86)/Graphviz2.38/lib/release/lib")

set(SOURCE_FILES main.c)
include_directories("${GRAPHVIZ_INCLUDE_DIR}")
add_executable(Learning ${SOURCE_FILES})

find_library(CGRAPH_LIBRARY cgraph HINTS "${GRAPHVIZ_LIB_DIR}" REQUIRED)
find_library(GVC_LIBRARY gvc HINTS "${GRAPHVIZ_LIB_DIR}" REQUIRED)
target_link_libraries( Learning ${CGRAPH_LIBRARY} ${GVC_LIBRARY} )

MAIN.C

#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <gvc.h>
#include <cgraph.h>

int main() {
    Agraph_t *graph;
    Agnode_t *nodeA, *nodeB;
    Agedge_t *edge1;
    Agsym_t *symbol1;
    GVC_t *gvc;

    gvc = gvContext();
    graph = agopen( "graph", Agdirected, NULL);
    nodeA = agnode(graph, "nodeA", 1);
    nodeB = agnode(graph, "nodeB", 1);
    edge1 = agedge(graph, nodeA, nodeB, 0, 1);
    printf("debug");

    agsafeset(nodeA, "color", "red", "");
    gvLayout(gvc, graph, "dot");
    gvRender(gvc, graph, "dot", NULL);
    agclose(graph);
    return ( gvFreeContext(gvc));
    }

Answer 1

该警告可能是由于缺少运行时依赖项pango（库）引起的。您可以尝试为您的 mingw 设置安装适当的pango软件包pangocairo，看看是否可以解决问题。

让我知道这是否有效！