Here, GCC warns about every use of the INIT_PROC_ADDR macro, for example:
In file included from compat/mingw.c:8:
compat/mingw.c: In function 'mingw_strftime':
compat/win32/lazyload.h:38:12: warning: assignment to
'size_t (*)(char *, size_t, const char *, const struct tm *)'
{aka 'long long unsigned int (*)(char *, long long unsigned int,
const char *, const struct tm *)'} from incompatible pointer type
'FARPROC' {aka 'long long int (*)()'} [-Wincompatible-pointer-types]
38 | (function = get_proc_addr(&proc_addr_##function))
| ^
compat/mingw.c:1014:6: note: in expansion of macro 'INIT_PROC_ADDR'
1014 | if (INIT_PROC_ADDR(strftime))
| ^~~~~~~~~~~~~~
(message wrapper for convenience). Insert a cast to keep the compiler
happy. A cast is fine in these cases because they are generic function
pointer values that have been looked up in a DLL.
Signed-off-by: Johannes Sixt <j6t@xxxxxxxx>
---
How can this have worked ever without a warning?
compat/win32/lazyload.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/compat/win32/lazyload.h b/compat/win32/lazyload.h
index d2056cdadf..dc35cf080b 100644
--- a/compat/win32/lazyload.h
+++ b/compat/win32/lazyload.h
@@ -26,7 +26,8 @@ struct proc_addr {
#define DECLARE_PROC_ADDR(dll, rettype, function, ...) \
static struct proc_addr proc_addr_##function = \
{ #dll, #function, NULL, 0 }; \
- static rettype (WINAPI *function)(__VA_ARGS__)
+ typedef rettype (WINAPI *proc_type_##function)(__VA_ARGS__); \
+ static proc_type_##function function;
/*
* Loads a function from a DLL (once-only).
@@ -35,7 +36,7 @@ struct proc_addr {
* This function is not thread-safe.
*/
#define INIT_PROC_ADDR(function) \
- (function = get_proc_addr(&proc_addr_##function))
+ (function = (proc_type_##function)get_proc_addr(&proc_addr_##function))
static inline FARPROC get_proc_addr(struct proc_addr *proc)
{
--
2.33.0.130.g83e2707afc
