链接器返回"relocation has a invalid symbol at symbol index...“
链接器返回"relocation has a invalid symbol at symbol index...“
提问于 2012-05-26 20:35:45
我正在Ubuntu上试用一些代码。我正在尝试运行以下代码
#include <cstdlib>
#include <cmath>
#include <ctime>
#include "random.h"
using namespace std;
/* Function prototype! */
void initRandomSeed();
int randomInteger(int low,int high){
initRandomSeed();
double d= rand()/(double(RAND_MAX)+1);
double s= d*(double(high)-low+1);
return int(floor(low)+s);
}
double randomReal(int low,int high){
initRandomSeed();
double d=rand()/(double(RAND_MAX)+1);
double s=d*(double(high)-low+1);
return low+s;
}
bool randomChance(double p){
initRandomSeed();
return randomReal(0,1)<p;
}
void setRandomSeed(int seed){
initRandomSeed();
srand(seed);
}
void initRandomSeed(){
// to retain updated values across different stack frames! nice!
static bool initialized=false;
// this is executed only very first time and random value obtained from system clock!
if(!initialized){
srand(int(time(NULL)));
initialized=true;
}
}当我尝试使用g++编译上面的代码时，我得到了以下错误
@ubuntu:~/Chardway$ g++ random.cpp
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 0 has invalid symbol index 10
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 1 has invalid symbol index 11
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 2 has invalid symbol index 2
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 3 has invalid symbol index 2
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 4 has invalid symbol index 10
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 5 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 6 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 7 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 8 has invalid symbol index 2
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 9 has invalid symbol index 2
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 10 has invalid symbol index 11
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 11 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 12 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 13 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 14 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 15 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 16 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 17 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 18 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 19 has invalid symbol index 12
/usr/bin/ld: /usr/lib/debug/usr/lib/x86_64-linux-gnu/crt1.o(.debug_info): relocation 20 has invalid symbol index 19
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: ld returned 1 exit status任何帮助或帮助问题的链接都会很有帮助！谢谢!
回答 5
Stack Overflow用户
回答已采纳
发布于 2012-05-26 20:40:02
我不确定您的无效重定位错误，但明显缺少的是您没有main函数。您需要为您的应用程序定义一个名为main的入口点，该入口点在全局范围内定义，例如：
int main()
{
// TODO: implementation
}Stack Overflow用户
发布于 2012-05-26 20:41:13
“对‘main’的未定义引用”是因为您没有定义main()函数，该函数是您的程序的入口点：
int main()
{
// call other functions
}Stack Overflow用户
发布于 2014-05-26 13:54:12
有趣的是，如果我试图编译一个.h文件而不是.c文件，并在一个步骤中链接到一个库，我会得到相同的错误。
下面是一个大大简化的示例：
$ echo 'int main () {}' > test.h
$ g++ test.h -ltommath && echo success
/usr/lib/gcc/x86_64-linux-gnu/4.8/../../../x86_64-linux-gnu/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status在这种情况下，解决方案是重命名文件，使其以.c结尾
$ echo 'int main () {}' > test.c
$ g++ test.c -ltommath && echo success
success页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/10766256
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