gcc未定义对gd函数的引用

我正试图编译一个程序，但在运行

makeinstall

时出现以下错误

gcc -fPIC -O3 -g -O2 -o treeviewer -L/usr/include -lm -lpng -ljpeg -lgd treeviewer.o tree.o fileio.o tree.o: 
In function `drawImage':
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:587: undefined reference to `gdFontMediumBold'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:587: undefined reference to `gdImageString'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:602: undefined reference to `gdImageLine'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:610: undefined reference to `gdImageLine'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:620: undefined reference to `gdImageFilledRectangle'
tree.o: In function `TreeToImage':
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:477: undefined reference to `gdFontMediumBold'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:526: undefined reference to `gdImageCreate'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:527: undefined reference to `gdImageColorAllocate'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:528: undefined reference to `gdImageColorAllocate'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:529: undefined reference to `gdImageColorAllocate'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:530: undefined reference to `gdImageColorAllocate'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:531: undefined reference to `gdImageColorAllocate'
tree.o:/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:532: more undefined references to `gdImageColorAllocate' follow
tree.o: In function `TreeToImage':
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:548: undefined reference to `gdImagePng'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:552: undefined reference to `gdImageDestroy'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:543: undefined reference to `gdImageJpeg'
tree.o: In function `printTreeInfo':
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:642: undefined reference to `gdFontMediumBold'
tree.o: In function `drawImage':
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:627: undefined reference to `gdImageRectangle'
/home/localadmin/codehop-dev/i-codehop/treeviewer/tree.c:624: undefined reference to `gdImageFilledRectangle'
collect2: error: ld returned 1 exit status
make: *** [treeviewer] Error 1

---

我已经使用commmand

sudo apt get-y install libgd2 xpm dev build-essential安装了
libgd
。文件夹
/usr/include
包含文件
gd.h
。谁能告诉我我错过了什么？提前感谢。
您可能需要使用
-L
列出
libgd.a
所在的目录，如果它不在gcc的默认目录列表中。
通过更改

gcc -fPIC -O3 -g -O2 -o treeviewer -L/usr/include -lm -lpng -ljpeg -lgd treeviewer.o tree.o fileio.o tree.o

到

我也列出了该目录，并重新运行make文件，但结果仍然相同<代码>gcc-fPIC-O3-g-O2-o treeviewer-L/usr/include-L/usr/lib/x86_64-linux-gnu-lm-lpng-ljpeg-lgd treeviewer.o tree.o fileio.o

gcc -fPIC -O3 -g -O2 treeviewer.o tree.o fileio.o tree.o -L/usr/include -lm -lpng -ljpeg -lgd -o treeviewer