对 sync_fetch_and_add_4 的未定义引用 [英] undefined reference to sync_fetch_and_add_4

问题描述

每当我尝试在 64 位机器上将 __sync_fetch_and_add 与 -m32 一起使用时，我都会收到以下错误，但它在普通 64 位机器上编译得很好.我正在使用 gcc 编译器 4.1.2.这里可能有什么问题，解决方案是什么?

Whenever I try to use __sync_fetch_and_add with -m32 on a 64 bit machine, I get the following error, while it compiles fine with normal 64 bit. I am using gcc compiler 4.1.2. What can be the problem here and what is the solution?

replication.cpp:(.text+0xb3b): undefined reference to `__sync_fetch_and_add_4'
replication.cpp:(.text+0xb82): undefined reference to `__sync_fetch_and_add_4'
replication.cpp:(.text+0xcc2): undefined reference to `__sync_fetch_and_add_4'
/tmp/cc7u9FLV.o: In function `potential_barrier_leader(unsigned int, pthread_barrier_t*)':
replication.cpp:(.text+0xd3f): undefined reference to `__sync_fetch_and_add_4'
replication.cpp:(.text+0xd54): undefined reference to `__sync_fetch_and_add_4'
/tmp/cc7u9FLV.o:replication.cpp:(.text+0xdb0): more undefined references to `__sync_fetch_and_add_4' follow
collect2: ld returned 1 exit status
make: *** [all] Error 1

推荐答案

使用 -march=i486 标志对我有用.

Using -march=i486 flag did the trick for me.

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