在OS X上编译dlib [英] Compiling dlib on OS X

问题描述

我尝试在OS X的Qt项目中使用dlib。因此，在此尝试中，我做了以下操作：

I try to use dlib in Qt project on OS X. So, in this try I did following:

在dlib根目录中：

cd examples
mkdir build
cd build
cmake ..
cmake --build . --config Release

在dlib根目录中：

mkdir build
cd build
cmake .. -DCMAKE_INSTALL_PREFIX=/Users/user/dlib_build
cmake --build . --config Release --target install

.pro文件：

INCLUDEPATH += /Users/user/dlib_build/include
LIBS += -L/Users/user/dlib_build/lib
LIBS += -ldlib

main.cpp：

//...
frontal_face_detector detector = get_frontal_face_detector();
//...

编译输出：

Undefined symbols for architecture x86_64:
"_dgesvd_", referenced from:
       dlib::lapack::binding::gesvd(char, char, int, int, double*, int, double*, double*, int, double*, int, double*, int) in main.o 
ld: symbol(s) not found for architecture x86_64

如何解决此问题并在OS X上将dlib与Qt一起使用？

How can I solve this and use dlib with Qt on OS X?

推荐答案

正确的解决方案是添加缺少的库以进行链接。构建Dlib时-它找到了一些BLAS库并启用了BLAS支持。
要查找此库，请查看位于
/ Users / user / dlib_build / lib / pkgconfig的dlib的pkgconfig文件，它的行类似于库：-L $ {libdir} -ldlib
Qt不会自动管理此类依赖关系，因此您应该手动添加blas库

The right solution is to add missing libraries for linking. When Dlib was build - it found some BLAS library and enabled BLAS support. To find this library - take a look at pkgconfig file from dlib that is located at /Users/user/dlib_build/lib/pkgconfig, it will have line like "Libs: -L${libdir} -ldlib" Qt does not manage such dependencies automatically, so you should add blas libraries by hand

另一种（简单的）解决方案是在不使用BLAS的情况下构建dlib / LAPACK支持：
在dlib根目录中：

The other (simple) solution is to build dlib without BLAS/LAPACK support: In dlib root:

mkdir build
cd build
cmake .. -DDLIB_USE_BLAS=OFF -DDLIB_USE_LAPACK=OFF -DCMAKE_INSTALL_PREFIX=/Users/user/dlib_build
cmake --build . --config Release --target install

这篇关于在OS X上编译dlib的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！