[Mingw-notify] [ mingw-Bugs-985752 ] function pointer calling conversion problem

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Bugs item #985752, was opened at 2004-07-06 18:37
Message generated for change (Comment added) made by dannysmith
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=102435&aid=985752&group_id=2435

Category: None
Group: None
>Status: Closed
>Resolution: Fixed
Priority: 5
Submitted By: Alexandr Zamaraev (shura_zam)
Assigned to: Nobody/Anonymous (nobody)
Summary: function pointer calling conversion problem

Initial Comment:
If i declare function pointer as:
typedef ret_type (__stdcall *func_t)(args);
Some assigment generate error "invalid conversion".

But If i declare function pointer as:
typedef ret_type (* __stdcall func_t)(args);
Other some assigment generate error "invalid conversion".

What mast i declare function pointer ?

My system information:

Os WinXP
gcc version 3.3.1 (mingw special 20030804-1)
GNU ld version 2.13.90 20030111
MinGW-3.1.0-1.exe
__MINGW32_VERSION 3.1
__W32API_VERSION 2.5

Command line for show bug:
>g++ -Wall -c -pipe PluginBMP.cpp


----------------------------------------------------------------------

>Comment By: Danny Smith (dannysmith)
Date: 2004-07-06 20:33

Message:
Logged In: YES 
user_id=11494

Like this (which is actually a testcase in gcc sources):

extern int * (__attribute__((stdcall)) *fooPtr)( void);
int * __attribute__((stdcall)) myFn01( void) { return 0; }

void snafu( void)
{
  fooPtr = myFn01;
}


There were problems in 3.3.1 with return types that were 
pointers.  The workaround was to enclose the return value in 
(), like

typedef (void *) (DLL_CALLCONV *FI_OpenProc)(FreeImageIO 
*io, fi_handle handle, BOOL read);

That bug is fixed in gcc now.

Danny

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=102435&aid=985752&group_id=2435