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- Subject: Re: warning in mingw [Was: [ANN] Lua 5.4.0 (rc1) now available]
- From: Gé Weijers <ge@...>
- Date: Mon, 27 Apr 2020 13:09:19 -0700
From the documentation of GCC 9.3.0:
Warn when a function pointer is cast to an incompatible function pointer. In a cast involving function types with a variable argument list only the types of initial arguments that are provided are considered. Any parameter of pointer-type matches any other pointer-type. Any benign differences in integral types are ignored, like
long on ILP32 targets. Likewise type qualifiers are ignored. The function type
void (*) (void) is special and matches everything, which can be used to suppress this warning. In a cast involving pointer to member types this warning warns whenever the type cast is changing the pointer to member type. This warning is enabled by -Wextra.
My suggestion: turn the warning off, at least for the file that contains this code. Code invoking a dynamic linker can't be checked in any sane way by a compiler.
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