无法解析的外部符号：__cairo_path_fixed_stroke_to_traps

Question

我跟随此post来构建和安装cairo。

不过，我被困与下面的错误：

Error 277 error LNK2019: unresolved external symbol __cairo_path_fixed_stroke_to_traps referenced in function __cairo_traps_compositor_stroke C:\gtk_compilation\cairo\cairo-1.12.18\msvc\vs10\cairo-traps-compositor.obj cairo 

安装指南说，我需要关闭，我没有使用的/GL-编译器标志整个程序优化 但仍然没有办法围绕这个问题。

下面是从C:\gtk_compilation\cairo\cairo-1.12.18\msvc\vs10\cairo-traps-compositor.c文件的摘录：

cairo_int_status_t (*func) (const cairo_path_fixed_t *path, 
       const cairo_stroke_style_t *stroke_style, 
       const cairo_matrix_t *ctm, 
       const cairo_matrix_t *ctm_inverse, 
       double   tolerance, 
       cairo_traps_t  *traps); 
composite_traps_info_t info; 
unsigned flags; 

if (antialias == CAIRO_ANTIALIAS_BEST || antialias == CAIRO_ANTIALIAS_GOOD) { 
     func = _cairo_path_fixed_stroke_polygon_to_traps; 
     flags = 0; 
    } else { 
     func = _cairo_path_fixed_stroke_to_traps; /* line#2183 */ 
     flags = need_bounded_clip (extents) & ~NEED_CLIP_SURFACE; 
    } 

上述功能在cairoint.h被定义为：

cairo_private cairo_int_status_t 
_cairo_path_fixed_stroke_to_traps (const cairo_path_fixed_t *path, 
        const cairo_stroke_style_t *stroke_style, 
        const cairo_matrix_t *ctm, 
        const cairo_matrix_t *ctm_inverse, 
        double  tolerance, 
        cairo_traps_t *traps); 

cairo_private cairo_int_status_t 
_cairo_path_fixed_stroke_polygon_to_traps (const cairo_path_fixed_t *path, 
         const cairo_stroke_style_t *stroke_style, 
         const cairo_matrix_t *ctm, 
         const cairo_matrix_t *ctm_inverse, 
         double  tolerance, 
         cairo_traps_t *traps); 

有谁请提出解决类似的问题？

Answer 1

继@andlabs评论，我发现文件cairo-path-stroke-traps.c未包含在Visual Studio项目源文件中。增加了这个并重建了解决方案 - Voila！