我正在尝试构建一个依赖于GraphicsMagick C ++库的小实用程序,但在链接到库时出现以下错误:
make all-recursive
make[1]: Entering directory `/home/ale/sample'
Making all in src
make[2]: Entering directory `/home/ale/sample/src'
g++ -g -O2 -o mysample mysample-a.o -L/usr/local/lib -lexiv2 -L/usr/local/lib -lGraphicsMagick++ -lGraphicsMagick
/usr/local/lib/libGraphicsMagick.a(magick_libGraphicsMagick_la-png.o): In function `png_put_data':
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:1171: undefined reference to `png_get_io_ptr'
/usr/local/lib/libGraphicsMagick.a(magick_libGraphicsMagick_la-png.o): In function `PNGWarningHandler':
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:1357: undefined reference to `png_error'
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:1361: undefined reference to `png_get_error_ptr'
/usr/local/lib/libGraphicsMagick.a(magick_libGraphicsMagick_la-png.o): In function `PNGErrorHandler':
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:1338: undefined reference to `png_get_error_ptr'
/usr/local/lib/libGraphicsMagick.a(magick_libGraphicsMagick_la-png.o): In function `png_get_data':
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:1060: undefined reference to `png_get_io_ptr'
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:1076: undefined reference to `png_warning'
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:1077: undefined reference to `png_error'
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:1067: undefined reference to `png_warning'
/usr/local/lib/libGraphicsMagick.a(magick_libGraphicsMagick_la-png.o): In function `png_write_raw_profile':
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:6243: undefined reference to `png_malloc'
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:6253: undefined reference to `png_malloc'
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:6254: undefined reference to `png_malloc'
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:6281: undefined reference to `png_set_text'
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:6282: undefined reference to `png_free'
/home/ale/Downloads/GraphicsMagick-1.3.18/coders/png.c:6283: undefined reference to `png_free'
为什么/ usr / local / lib中的库引用了GraphicsMagick源代码(我已经构建并安装了)?
答案 0 :(得分:0)
错误说你也需要与libpng联系。
您有非常具有描述性的源代码相关错误,因为您已使用调试符号构建了graphicsmagick。在发布版本中(或者如果您将调试符号从调试版本中删除),您将只看到未定义的函数名称,而没有源代码参考它们的使用位置。