shntool: fix build with GCC 15

pkgs/by-name/sh/shntool/bool-type.patch

@@ -0,0 +1,48 @@
+diff --git a/include/format.h b/include/format.h
+index 567993e..ab293f8 100644
+--- a/include/format.h
++++ b/include/format.h
+@@ -35,7 +35,7 @@ void tagcpy(unsigned char *,unsigned char *);
+ int tagcmp(unsigned char *,unsigned char *);
+ 
+ /* function to check if a file name is about to be clobbered, and if so, asks whether this is OK */
+-int clobber_check(char *);
++bool clobber_check(char *);
+ 
+ /* find an output format module with the given name */
+ format_module *find_format(char *);
+diff --git a/include/mode.h b/include/mode.h
+index a9c8cd0..fc13d4f 100644
+--- a/include/mode.h
++++ b/include/mode.h
+@@ -78,7 +78,7 @@ void create_output_filename(char *,char *,char *);
+ FILE *open_output_stream(char *,proc_info *);
+ 
+ /* function to determine if two filenames point to the same file */
+-int files_are_identical(char *,char *);
++bool files_are_identical(char *,char *);
+ 
+ /* function to remove a file if it exists */
+ void remove_file(char *);
+diff --git a/include/module-types.h b/include/module-types.h
+index c49c661..2d7b0a3 100644
+--- a/include/module-types.h
++++ b/include/module-types.h
+@@ -23,6 +23,8 @@
+ #ifndef __MODULE_TYPES_H__
+ #define __MODULE_TYPES_H__
+ 
++#include <stdbool.h>
++
+ #ifdef HAVE_CONFIG_H
+ #include "config.h"
+ #endif
+@@ -44,8 +46,6 @@
+ #define PATHSEPCHAR '/'
+ #endif
+ 
+-/* boolean type */
+-typedef int bool;
+ 
+ /* wtypes */
+ typedef unsigned long wlong;

pkgs/by-name/sh/shntool/function-pointer-type.patch

@@ -0,0 +1,26 @@
+diff --git a/src/core_mode.c b/src/core_mode.c
+index d67e317..21d3b9e 100644
+--- a/src/core_mode.c
++++ b/src/core_mode.c
+@@ -564,17 +564,17 @@ static int compare_ascii(const wave_info **w1,const wave_info **w2)
+ 
+ static void ascii_sort_files(wave_info **filenames, int numfiles)
+ {
+-  int (*cmpfunc) ();
++  int (*cmpfunc) (const void *, const void *);
+ 
+-  cmpfunc = compare_ascii;
++  cmpfunc = (int (*)(const void *, const void *))compare_ascii;
+   qsort(filenames,numfiles,sizeof(wave_info *),cmpfunc);
+ }
+ 
+ static void version_sort_files(wave_info **filenames,int numfiles)
+ {
+-  int (*cmpfunc) ();
++  int (*cmpfunc) (const void *, const void *);
+ 
+-  cmpfunc = compare_version;
++  cmpfunc = (int (*)(const void *, const void *))compare_version;
+   qsort(filenames,numfiles,sizeof(wave_info *),cmpfunc);
+ }
+ 

pkgs/by-name/sh/shntool/package.nix

@@ -17,10 +17,18 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-Qn4LwVx34EhypiZDIxuveNhePigkuiICn1nBukoQf5Y=";
   };
 
+  patches = [
+    # Fix conflicts between reserved keywords `bool` (starting from C23) and custom `typedef`s.
+    ./bool-type.patch
+    # Fix implicit weak-typed pointer casting.
+    ./function-pointer-type.patch
+  ];
+
   buildInputs = [ flac ];
 
   prePatch = ''
-    patches=$(grep -v '#' ./debian/patches/series | while read patch; do echo "./debian/patches/$patch"; done | tr '\n' ' ')
+    additional_patches=$(grep -v '#' ./debian/patches/series | while read patch; do echo "./debian/patches/$patch"; done | tr '\n' ' ')
+    patches="$patches $additional_patches"
   '';
 
   meta = {