bug#71786: 30.0.60; Compiler warnings in the Cygwin-w32 build

[Eli Zaretskii]

> Date: Wed, 26 Jun 2024 14:22:43 -0400
> From: Ken Brown <kbrown@cornell.edu>
> 
> The following warnings occur in the Cygwin-w32 build, on both the
> emacs-30 and the master branch:
> 
> ../../src/w32fns.c: At top level:
> ../../src/w32fns.c:10581:1: warning: no previous prototype for 
> ‘w32_get_resource’ 
> [-Wmissing-prototypes]
> 10581 | w32_get_resource (const char *key, const char *name, LPDWORD lpdwtype)
>        | ^~~~~~~~~~~~~~~~
> ../../src/w32fns.c:11288: warning: macro "DEFAULT_IMAGE_BASE" is not used 
> [-Wunused-macros]
> 11288 | # define DEFAULT_IMAGE_BASE (ptrdiff_t)0x01000000
>        |
> 
> This fixes them on both branches:
> 
> diff --git a/src/cygw32.h b/src/cygw32.h
> index cc3414a39d92..2f265cab4adf 100644
> --- a/src/cygw32.h
> +++ b/src/cygw32.h
> @@ -35,5 +35,6 @@ #define CYGW32_H
> 
>   extern void syms_of_cygw32 (void);
>   extern char * w32_strerror (int error_no);
> +extern LPBYTE w32_get_resource (const char * key, const char * name, LPDWORD 
> type);
> 
>   #endif /* CYGW32_H */
> diff --git a/src/w32fns.c b/src/w32fns.c
> index b784a9a563d7..4c2f18abd084 100644
> --- a/src/w32fns.c
> +++ b/src/w32fns.c
> @@ -11284,7 +11284,7 @@ #define BACKTRACE_LIMIT_MAX 62
>      configure.ac.  */
>   #if defined MINGW_W64 && EMACS_INT_MAX > LONG_MAX
>   # define DEFAULT_IMAGE_BASE (ptrdiff_t)0x400000000
> -#else  /* 32-bit MinGW build */
> +#elif !defined CYGWIN  /* 32-bit MinGW build */
>   # define DEFAULT_IMAGE_BASE (ptrdiff_t)0x01000000
>   #endif
> 
> OK for the emacs-30 branch?

Yes, thanks.