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我試圖在我的Ubuntu 12.04計算機上爲histograms of oriented gradients設置一個名爲fastHOG的庫。當我嘗試編譯off-the-shelf fastHOG code時，編譯器會抱怨找不到fltk/run.h。根據Rahul Ashok's tutorial about fastHOG，我需要安裝Fast Light Toolkit (FLTK) 2.0。本教程指出，2.0以外的FLTK版本不起作用。編譯快速工具包（FLTK）2.0與fastHOG一起使用
所以，我試圖編譯FLTK 2.0（svn co http://svn.easysw.com/public/fltk/fltk/trunk fltk-2.0）。當我在fltk-2.0文件夾中執行make時，出現類似undefined reference to 'FcInit'的錯誤。
有關如何讓FLTK 2.0正確編譯的任何建議？
下面是完整的錯誤打印輸出的g ++ 4.6.3在Ubuntu 12.04建設FLTK 2.0的時候，我得到：
...
Linking fluid2...
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::list_fonts(fltk::Font**&): error: undefined reference to 'FcInit'
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::list_fonts(fltk::Font**&): error: undefined reference to 'FcPatternCreate'
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::list_fonts(fltk::Font**&): error: undefined reference to 'FcObjectSetBuild'
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::list_fonts(fltk::Font**&): error: undefined reference to 'FcFontList'
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::list_fonts(fltk::Font**&): error: undefined reference to 'FcPatternDestroy'
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::list_fonts(fltk::Font**&): error: undefined reference to 'FcPatternGetString'
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::list_fonts(fltk::Font**&): error: undefined reference to 'FcFontSetDestroy'
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::Font::sizes(int*&): error: undefined reference to 'FcPatternGetDouble'
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::Font::sizes(int*&): error: undefined reference to 'FcFontSetDestroy'
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::Font::encodings(char const**&): error: undefined reference to 'FcFontSetDestroy'
../lib/libfltk2.a(Font.o):Font.cxx:function fltk::Font::encodings(char const**&): error: undefined reference to 'FcPatternGetString' ../lib/libfltk2.a(Image.o):Image.cxx:function figure_out_visual(): error: undefined reference to 'XRenderFindStandardFormat'
../lib/libfltk2.a(Image.o):Image.cxx:function fl_xrender_draw_image(unsigned long, fltk::PixelType, fltk::Rectangle const&, fltk::Rectangle const&): error: undefined reference to 'XRenderCreatePicture'
../lib/libfltk2.a(Image.o):Image.cxx:function fl_xrender_draw_image(unsigned long, fltk::PixelType, fltk::Rectangle const&, fltk::Rectangle const&): error: undefined reference to 'XRenderSetPictureFilter'
../lib/libfltk2.a(Image.o):Image.cxx:function fl_xrender_draw_image(unsigned long, fltk::PixelType, fltk::Rectangle const&, fltk::Rectangle const&): error: undefined reference to 'XRenderSetPictureTransform'
../lib/libfltk2.a(Image.o):Image.cxx:function fl_xrender_draw_image(unsigned long, fltk::PixelType, fltk::Rectangle const&, fltk::Rectangle const&): error: undefined reference to 'XRenderComposite'
../lib/libfltk2.a(Image.o):Image.cxx:function fl_xrender_draw_image(unsigned long, fltk::PixelType, fltk::Rectangle const&, fltk::Rectangle const&): error: undefined reference to 'XRenderComposite'
../lib/libfltk2.a(Image.o):Image.cxx:function fl_xrender_draw_image(unsigned long, fltk::PixelType, fltk::Rectangle const&, fltk::Rectangle const&): error: undefined reference to 'XRenderComposite'
../lib/libfltk2.a(Image.o):Image.cxx:function fl_xrender_draw_image(unsigned long, fltk::PixelType, fltk::Rectangle const&, fltk::Rectangle const&): error: undefined reference to 'XRenderFreePicture'
collect2: ld returned 1 exit status
make[1]: *** [fluid2] Error 1
make: *** [all] Error 2
謝謝 - 我只是試了一下。 'libxrender-dev已經是最新版本了' – solvingPuzzles
還有什麼我想嘗試的？ – solvingPuzzles
我不能想到其他任何東西:(我希望在Makefile中的標誌正確包含上述2個庫？ –