使用libpng从IPOL构建代码时未定义的引用

时间:2013-11-05 11:37:51

标签: c compilation libpng

我正在尝试编译可在线获取的代码Non-Local Means Denoising

当我编译源代码时,会出现以下错误,我认为这些错误主要归因于libpng

  g++  -L/opt/local/lib/ -L/usr/local/lib/ -L/usr/lib/x86_64-linux-gnu/ -fopenmp -lpng    
  -o nlmeans_ipol  nlmeans_ipol.o io_png.o libauxiliar.o libdenoising.o mt19937ar.o
  io_png.o: In function `io_png_write_raw':
  io_png.c:(.text+0xe0): undefined reference to `png_create_write_struct'
  io_png.c:(.text+0xf6): undefined reference to `png_create_info_struct'
  io_png.c:(.text+0x12b): undefined reference to `png_init_io'
  io_png.c:(.text+0x194): undefined reference to `png_set_IHDR'
  io_png.c:(.text+0x1a6): undefined reference to `png_write_info'
  io_png.c:(.text+0xb36): undefined reference to `png_write_image'
  io_png.c:(.text+0xb48): undefined reference to `png_write_end'
  io_png.c:(.text+0xb62): undefined reference to `png_destroy_write_struct'
  io_png.c:(.text+0xbcc): undefined reference to `png_destroy_write_struct'
  io_png.c:(.text+0xc1f): undefined reference to `png_destroy_read_struct'
  io_png.c:(.text+0xe6a): undefined reference to `png_destroy_write_struct'
  io_png.c:(.text+0xe80): undefined reference to `png_destroy_write_struct'

我已经按照以下线程将文件“libpng.a”放在许多位置,但它没有帮助。

我见过类似的libpng problem here,但没有帮助。

我正在使用ubuntu 12.04。

有人可以告诉我实际会出现什么问题吗?

编辑1 完整的电话如下

  g++ -O3 -funroll-loops -fomit-frame-pointer  -fno-tree-pre -falign-loops -ffast-math -ftree-vectorize -Wall -Wextra -Wno-write-strings -Wno-deprecated -ansi -fopenmp   -c -o nlmeans_ipol.o nlmeans_ipol.cpp
  cc -c -o io_png.o  io_png.c -O3 -funroll-loops -fomit-frame-pointer  -fno-tree-pre -falign-loops -ffast-math -ftree-vectorize -Wall -Wextra -Wno-write-strings -ansi -I/opt/local/include/ -I/usr/local/include/   
  g++ -c -o libauxiliar.o  libauxiliar.cpp -O3 -funroll-loops -fomit-frame-pointer  -fno-tree-pre -falign-loops -ffast-math -ftree-vectorize -Wall -Wextra -Wno-write-strings -Wno-deprecated -ansi -fopenmp -I/opt/local/include/ -I/usr/local/include/ 
  g++ -c -o libdenoising.o  libdenoising.cpp -O3 -funroll-loops -fomit-frame-pointer  -fno-tree-pre -falign-loops -ffast-math -ftree-vectorize -Wall -Wextra -Wno-write-strings -Wno-deprecated -ansi -fopenmp -I/opt/local/include/ -I/usr/local/include/ 
  cc -c -o mt19937ar.o  mt19937ar.c -O3 -funroll-loops -fomit-frame-pointer  -fno-tree-pre -falign-loops -ffast-math -ftree-vectorize -Wall -Wextra -Wno-write-strings -ansi -I/opt/local/include/ -I/usr/local/include/   
  g++ -lpng -lm -fopenmp -L/opt/local/lib/ -L/usr/local/lib/ -L/usr/lib/ -L/usr/lib/x86_64-linux-gnu/ -fopenmp -lpng -lpngwriter -lz -lfreetype -o nlmeans_ipol  nlmeans_ipol.o io_png.o libauxiliar.o libdenoising.o mt19937ar.o

这是完整的电话。它是一个make文件,上面的转储在命令提示符下出现的副本中。

1 个答案:

答案 0 :(得分:2)

尝试更改g++调用中的参数序列,并在目标文件后面添加-lpng。链接器按照给定的顺序对参数进行评估,因此当它获得-lpng时,它还不知道io_png.o,因此它不会链接库中的必要代码

修改

makefile执行的最后一个命令是:

g++ -lpng -lm -fopenmp -L/opt/local/lib/ -L/usr/local/lib/ -L/usr/lib/ -L/usr/lib/x86_64-linux-gnu/ -fopenmp -lpng -lpngwriter -lz -lfreetype -o nlmeans_ipol  nlmeans_ipol.o io_png.o libauxiliar.o libdenoising.o mt19937ar.o

如果应该像

那样
g++ -L/opt/local/lib/ -L/usr/local/lib/ -L/usr/lib/ -L/usr/lib/x86_64-linux-gnu/   -o nlmeans_ipol  nlmeans_ipol.o io_png.o libauxiliar.o libdenoising.o mt19937ar.o -lpng -lm -fopenmp -lpngwriter -lz -lfreetype

我不知道每个库,也许-l...参数的序列仍然不对