Undefined symbols for architecture x86_64:

[ckeys]

Hi All ,

我尝试用cmake在于capi的EXAMPLE 里面的 sequence.

当我用make的时候，出现了以下的问题:

Scanning dependencies of target sequence
[ 50%] Building C object CMakeFiles/sequence.dir/main.c.o
[100%] Linking C executable sequence
Undefined symbols for architecture x86_64:
  "_paddle_arguments_create_none", referenced from:
      _main in main.c.o
  "_paddle_arguments_destroy", referenced from:
      _main in main.c.o
  "_paddle_arguments_get_value", referenced from:
      _main in main.c.o
  "_paddle_arguments_resize", referenced from:
      _main in main.c.o
  "_paddle_arguments_set_ids", referenced from:
      _main in main.c.o
  "_paddle_arguments_set_sequence_start_pos", referenced from:
      _main in main.c.o
  "_paddle_gradient_machine_create_for_inference", referenced from:
      _main in main.c.o
  "_paddle_gradient_machine_destroy", referenced from:
      _main in main.c.o
  "_paddle_gradient_machine_forward", referenced from:
      _main in main.c.o
  "_paddle_gradient_machine_randomize_param", referenced from:
      _main in main.c.o
  "_paddle_init", referenced from:
      _main in main.c.o
  "_paddle_ivector_create", referenced from:
      _main in main.c.o
  "_paddle_ivector_destroy", referenced from:
      _main in main.c.o
  "_paddle_matrix_create_none", referenced from:
      _main in main.c.o
  "_paddle_matrix_destroy", referenced from:
      _main in main.c.o
  "_paddle_matrix_get_row", referenced from:
      _main in main.c.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [sequence] Error 1
make[1]: *** [CMakeFiles/sequence.dir/all] Error 2
make: *** [all] Error 2

[NHZlX]

贴一下你的cmake 编译参数

[ckeys]

编译环境：MacOS 10.13.1
xcode版本：9.1
cmake 版本：3.9.6
我尝试搭建IOS平台编译paddle paddle.
首先我先
首先，我先根据以下网站配置cmake,
http://www.paddlepaddle.org/docs/develop/documentation/zh/mobile/cross_compiling_for_ios_cn.html 的cmake指令。然后make install
然后在cd到sequence文件夹，
用以下命令行进行cmake编译
mkdir build
cd build
cmake ..
-DIOS_ARCH="x86_64"
-DCMAKE_TOOLCHAIN_FILE=path/to/Paddle/cmake/cross_compiling/ios.cmake
-DPADDLE_ROOT=/your/path/to/install
-DCMAKE_BUILD_TYPE=MinSizeRel

make
然后就出现上面的错误了。

[NHZlX]

嗯， 那再贴一下你的交叉编译的cmake 参数

[ckeys]

你说的是cmake配置参数吗？
cmake -DCMAKE_SYSTEM_NAME=iOS
-DIOS_PLATFORM=SIMULATOR
-DIOS_ARCH="x86_64"
-DIOS_USE_VECLIB_FOR_BLAS=ON
-DCMAKE_INSTALL_PREFIX=your/path/to/install
-DWITH_C_API=ON
-DWITH_TESTING=OFF
-DWITH_SWIG_PY=OFF \

[Xreki]

@ckeys 你好。 capi/example里面的CMakelist.txt里面设定的是链接Paddle的动态库。但是iOS版Paddle只生成了静态库。
另外，提供一些参考链接：

• 如何在xcode里面链接Paddle：SSD Demo on Android and iOS Mobile#25 (comment)
• 一个iOS的demo：Init Commit for iOS AICamera Demo Mobile#26