Edit Question - KnowledgeHub

Title Body

I wrote a C++ function that I need to call from a C program. To make it callable from C, I specified extern "C" on the function declaration . I then compiled the C++ code, but the compiler (Dignus Systems/C++) generated a mangled name for the function. So, it apparently did not honor the extern "C" . To resolve this, I added extern "C" to the function definition . After this, the compiler generated a function name that is callable from C. Technically, the extern "C" only needs to be specified on the function declaration. Is this right? (The C++ FAQ has a good example of this.) Should you also specify it on the function definition? Here's an example to demonstrate this: /* ---------- */ /* "foo.h" */ /* ---------- */ #ifdef __cplusplus extern "C" { #endif /* Function declaration */ void foo(int); #ifdef __cplusplus } #endif /* ---------- */ /* "foo.cpp" */ /* ---------- */ #include "foo.h" /* Function definition */ extern "C" // <---- Is this needed? void foo(int i) { // do something... } My issue may be the result of incorrectly coding something, or I may have found a compiler bug. In any case, I wanted to consult stackoverflow to make sure I know which is technically the "right" way.

Tags (comma-separated) Cancel