鸡毛蒜皮集锦

来源：互联网发布：kvm虚拟机windows 编辑：程序博客网时间：2024/04/29 12:00

打算纪录一下各种鸡毛蒜皮的小错误，过段时间回头看看有没有用

1. MAC篇

MAC OX 10.8.2 ML, Xcode Xcode 4.5.1 (Build version 4G1004)

1.1 undefined symbols for architecture x86_64: "_omp_get_thread_num", referenced from:....

Solution: -fopenmp option both enables parsing of OpenMP pragmas at compile time and linking with libgompOpenMP run-time library (and also with libpthreads) at link time.

http://stackoverflow.com/questions/12500859/openmp-mac-osx-lion-c-linker-error-undefined-symbols-for-architecture-x86-64

1.2 ld: can't open output file for writing: xxxx, errno=21 for architecture x86_64

R&S: 有个和输出文件xxxx同名的文件夹！！（不区分大小写）

Error 21 in /usr/include/sys/errno.h is EISDIR

http://stackoverflow.com/questions/9200521/why-does-the-name-of-a-source-file-affect-compilation

1.3 编译opencv下的kalman例子出错：ld: can't write output file: kalman for architecture x86_64

R&S:都说了没权限嘛。。。如果一定要在安装目录下生成（/opt/local/share/OpenCV/samples/cpp/）就sudo就好了

这里https://discussions.apple.com/thread/3406578?start=0&tstart=0 说还要

sudo bash

export ARCHFLAGS='-arch i386 -arch x86_64'

没必要