使用gcc-4.7和openMP缺少___emutls_get_address [英] Missing ___emutls_get_address with gcc-4.7 and openMP

问题描述

我正在尝试在Mac OS 10.8.2上使用自编译的GCC-4.7.1编译程序.该程序使用openMP，编译成功；但是，当我尝试运行程序时，动态链接器会抱怨

I am trying to compile a program using a self-compiled GCC-4.7.1 on Mac OS 10.8.2. The program uses openMP and the compilation succeeds; however, when I try to run the program, the dynamic linker complains with

dyld: lazy symbol binding failed: Symbol not found: ___emutls_get_address
  Referenced from: /usr/local/gcc-4.7.1/lib/libgomp.1.dylib
  Expected in: /usr/lib/libSystem.B.dylib

dyld: Symbol not found: ___emutls_get_address
  Referenced from: /usr/local/gcc-4.7.1/lib/libgomp.1.dylib
  Expected in: /usr/lib/libSystem.B.dylib

使用-fopenmp编译的任何程序(包括MWE)中始终存在此问题

This issue is constantly present in any program compiled with -fopenmp, including the MWE

#include <stdio.h>

int main() {
  #pragma omp parallel
  printf("Hallo!\n");
  return 0;
}

请注意，"___emutls_get_address"是什么?符号?，即在链接阶段添加 -lgcc_eh 无效(我仍然得到相同的dyld错误消息).

Note that the solution suggested in What is the "___emutls_get_address" symbol?, namely adding -lgcc_eh in the linking phase, does not work (I still get the same dyld error message).

推荐答案

我也遇到了完全相同的问题.而且我是openMP的新手，使用Michal Fapso提供的解决方案的技能也不是很好.我通过使用

I had exactly the same problem too. And I am new to openMP, and my skill is not that good to use the solution offered by Michal Fapso. I solve this problem by using

brew link --overwrite gcc

问题解决了！

也许您可以尝试将gcc重新安装到Mac.

Maybe you can try to reinstall gcc to your Mac.

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