linkage Questions
5
Solved
I am new to C++. I have some doubts regarding multiple definitions error in C++.
Let's say I have 3 files in a program. One header file and 2 .cpp files. I have included the header file in b...
Jampan asked 20/9, 2013 at 10:7
2
Solved
As it is known, declaring extern "C" to C++ function makes its name have C linkage, enabling C code to link.
My question is - are there other programming languages we can make C++ function names h...
18
Solved
What exactly does putting extern "C" into C++ code do?
For example:
extern "C" {
void foo();
}
Legation asked 25/6, 2009 at 2:10
1
Solved
There are plenty of questions and answers relating to C++ global variables, such as:
static and extern global variables in C and C++
Global variables and constexpr (inline or not?)
Is there any se...
Riser asked 29/8, 2023 at 11:0
3
Solved
How can static local variable shared along different translation unit?
I know that "static" specifies internal linkage.
In case of "static" member function having same address i...
Cherub asked 30/4, 2023 at 10:33
1
I'm new to Rust and I'm trying to understand why can't Rust build faster. I'm specifically talking about the most common case, where I've made a small change in one of my source files and then I ne...
Unwonted asked 11/4, 2021 at 7:12
3
I compiled the following program with both g++ (7.1) and clang++ (xcode 9.0) with -std=c++11 -Wall and get the result:
g++
0x10052c050
0x10052c040
0x10052c040
clang++
0x108b74024
0x108b74018
0...
Johnsonjohnsonese asked 16/12, 2017 at 5:30
6
Solved
This is a follow-up question to an answer to Is it possible to typedef a pointer-to-extern-“C”-function type within a template?
This code fails to compile with g++, Visual C/C++, and Comeau C/C++ ...
10
When we are compiling a C program the output is stored in a.out. How can we redirect the compiled output to another file?
Acanthous asked 17/3, 2009 at 11:17
1
Solved
I have link-time error when trying to compile following code with gcc 12.1.0.
With clang, msvc and older gcc it compiles as expected.
template<typename T>
void def()
{}
template<void (*fo...
Firebug asked 4/6, 2022 at 18:16
3
Solved
In the C++11 standard, what is the difference between constexpr and static constexpr global variables when defined in a header? More specifically, when multiple translation units include the same h...
8
Solved
How can I remove this link warning? You can see code segment that causes this warning.
static AFX_EXTENSION_MODULE GuiCtrlsDLL = { NULL, NULL };
//bla bla
// Exported DLL initialization is run in c...
3
Solved
I am aware of how ODR, linkage, static, and extern "C" work with functions. But I am not sure about visibility of types since they cannot be declared static and there are no anonymous nam...
Ansate asked 20/10, 2021 at 8:48
1
According to http://gcc.gnu.org/wiki/Visibility,
With -fvisibility=hidden, you are telling GCC that every declaration not explicitly marked with a visibility attribute has a hidden visibility.
...
6
Solved
I have 2 files A.cpp and B.cpp which look something like
A.cpp
----------
class w
{
public:
w();
};
B.cpp
-----------
class w
{
public:
w();
};
Now I read somewhere (https://en.cppreference.co...
2
Solved
See the following code:
/* first file */
int i; /* definition */
int main () {
void f_in_other_place (void); /* declaration */
i = 0
return 0;
}
/* end of first file */
/* start of second fil...
2
Solved
Suppose I have two translation units:
//A.cpp
class X
{
};
//B.cpp
class X
{
int i;
};
Is the above program well-formed?
If not, no further questions. If the answer is yes, the program is well-f...
4
Solved
Take this simple data frame of linked ids:
test <- data.frame(id1=c(10,10,1,1,24,8),id2=c(1,36,24,45,300,11))
> test
id1 id2
1 10 1
2 10 36
3 1 24
4 1 45
5 24 300
6 8 11
I now want to gr...
Washday asked 27/8, 2012 at 3:38
1
Solved
While I was just checking which linkages are granted to extern local variables
I found that some different behavior between compilers
for instance if I tested below code
as you see in the comments ...
1
Solved
I want to forward declare a const variable without giving it external linkage. It seems to me, however, that this is impossible because the extern keyword simultaneously means "this has external li...
1
Solved
Consider the two translation units below. My goal is to inline the function add both in file1.c and main.c.
file1.c:
extern inline int add(int x, int y)
{
return x + y;
}
void g(void)
{
add(1,...
Metabolism asked 9/2, 2020 at 5:44
1
Solved
I'm trying to interface with a C library, which expects me to provide a pointer to a callback function.
As I understand it, according to the standard the callback must have C language linkag...
Horticulture asked 28/1, 2020 at 12:42
5
Solved
What is the difference between static and extern in C?
1
Solved
This description on cppreference.com says that
The lookup of a dependent name used in a template is postponed until the template arguments are known, at which time [...] ADL examines function de...
Shewchuk asked 26/8, 2019 at 18:33
1
Solved
During my research for an answer for this question I found (I did not know that before) that gcc and clang allow char arrays to be template arguments if they are declared static. E.g. this code com...
Brandish asked 12/7, 2019 at 14:29
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