[英]ld error while compiling with pthread in aarch64
我正在嘗試使用基於 aarch64 的 linux 主機上的線程來編譯和鏈接一個簡單的 C++ 程序。 簡單的程序如下:
#include <iostream>
#include <thread>
#include <atomic>
using namespace std;
#define ITERATIONS 1000
// to be called for multi threaded execution
void increment_atomic_thread (atomic<int>& a)
{
for (int i = 0; i < ITERATIONS; i++)
{
a++;
}
}
int main (int argc, char* argv[])
{
atomic<int> a, b, c, d;
thread t1 ( [&]() { increment_atomic_thread(a); } );
thread t2 ( [&]() { increment_atomic_thread(b); } );
thread t3 ( [&]() { increment_atomic_thread(c); } );
thread t4 ( [&]() { increment_atomic_thread(d); } );
t1.join();
t2.join();
t3.join();
t4.join();
return 0;
}
這段代碼在 x86-64 機器上編譯得很好,但是我在 aarch64 機器中得到一個 ld 錯誤,如下所示(output 是使用 --verbose 編譯時的最后幾行):
attempt to open /usr/lib/gcc/aarch64-linux-gnu/7/../../../aarch64-linux-gnu/crtn.o succeeded
/usr/lib/gcc/aarch64-linux-gnu/7/../../../aarch64-linux-gnu/crtn.o
libm.so.6 needed by /usr/lib/gcc/aarch64-linux-gnu/7/libstdc++.so
found libm.so at /usr/lib/gcc/aarch64-linux-gnu/7/../../../aarch64-linux-gnu/libm.so
/usr/bin/ld: /usr/lib/aarch64-linux-gnu/libpthread.a(pthread_create.o): relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `__stack_chk_guard@@GLIBC_2.17' which may bind externally can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: /usr/lib/aarch64-linux-gnu/libpthread.a(pthread_create.o)(.text+0x9cc): unresolvable R_AARCH64_ADR_PREL_PG_HI21 relocation against symbol `__stack_chk_guard@@GLIBC_2.17'
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
編譯命令為:
g++ -g -std=c++17 -lpthread -Xlinker --verbose -o pthread_basic.app pthread_basic.cpp /usr/lib/aarch64-linux-gnu/libpthread.a
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