why C++ cannot alias an inline function, C can ?

[Max Filippov]

On Sun, Apr 1, 2018 at 4:34 AM, Jason Vas Dias <jason.vas.dias@gmail.com> wrote:
> In C++ however, it does not compile :
>
>   $ g++ -g -std=gnu++11 -x c++ -c t.c
> t.c:5:8: error: 'void bar()' aliased to undefined symbol 'foo'
>    void bar(void);
>         ^
>
> Even though, if I compile the object with the declaration
> of bar() commented out , I can see C++ is not mangling
> the name "foo" :

gcc manual says the follwing about the alias attribute:
 "In C++, the mangled name for the target must be used."

so with the following modification your example compiles:

     static inline __attribute__((always_inline,alias("_ZL3foov")))
     void bar(void);

-- 
Thanks.
-- Max