中定义的函数时(程序内部定义的函数不涉及这个问题,因为函数的实现已经在自己的代码段、数据段中了),连接器会在三方库中搜索当前符号表中未定义的符号(这些未定义的符号需要在三方库中定位到,否则就会出现对xxx函数未定义引用),当在三方库的符号表中找不到对应的符号时,就会报undefined reference to xxx function。
main.c:(.text+0x7): undefined reference to `test' collect2: ld returned 1 exit status 这就是最典型的undefined reference错误,因为在链接时发现找不到某个函数的实现文件,本例中test.o文件中包含了test()函数的实现,所以如果按下面这种方式链接就没事了。 gcc -o main main.o test.o 【扩展】:其实...
我们没有真正的定义,编译器无法编译,自然就会出现Undefined reference to报错了。 我们有两种思路去解决: 将.cpp文件也导入main.cpp中(或者将对应的方法放到.h文件里也是一样的)。这样会让编译器明确模板类的定义。 或者显式申明用到的类型,例如直接写出(但是这样,好像就丧失了泛型的意义所在?) Bag<int>::Bag(...
reference to(function)”错误的原因是什么？你可能想试着像这样分别编译“optim.c”和“main.c”文件...
在Ubuntu linux C语言中使用数学函数---undefined reference to ‘sin‘问题解决和‘sqrt‘解决方式方法不同展示 在数学中我们用过sin和ln这样的函数,例如sin(π/2)=1,ln1=0等等,在C语言中也可以使用这些函数: #include <math.h> #include <stdio.h> int main(void) { double pi = 3.1416; printf(“sin...
You need to properly qualify that xora() is part of the class and that it is not just a function in the global scope. int decof::xora(int q, int i) But really there is not much point of our class since it doesn't have any class member variables. I also suggest you start us...
Eclipse error undefined reference to pcap function I had the same problem in Eclipse. I order to link this library to your project, right click the project in "Project Explorer" (short view) and choose "Properties". On the left go to "C/C++ Build" > "Settings" and on the "Settings"...
ex3-1.cc:(.text+0x139): undefined reference to `swap(int, int)' collect2: ld returned 1 exit status Sep 7, 2008 at 8:58pm Mitsakos(343) The declaration of the "swap" function isvoidswap(intx,inty); But after that you havevoidswap(int&x,int&y) ...
/tmp/ccJjiCoS.o: In function `main': main.cpp:(.text+0x7): undefined reference to `test()' collect2: ld returned 1 exit status 原因就是main.cpp为c++代码,调用了c语言库的函数,因此链接的时候找不到,解决方法:即在main.cpp中,把与c语言库test.a相关的头文件包括加入一个extern "C"的声明就...
g++ -c main.cpp g++ -o a.out stack.o main.o main.o: In function 'main': main.cpp:(.text+0x17): undefined reference to 'stack::init()' main.cpp:(.text+0x28): undefined reference to 'stack::push(int)' main.cpp:(.text+0x34): undefined reference to 'stack::print_stack()' ...