picoc: Fix build with gcc15 (#513804)

pkgs/by-name/pi/picoc/gcc15-fixes.patch

@@ -0,0 +1,45 @@
+--- a/interpreter.h
++++ b/interpreter.h
+@@ -173,6 +173,7 @@ struct ValueType
+ };
+ 
+ /* function definition */
++typedef struct Value Value;         /* Needed to allow reference before definition */
+ struct FuncDef
+ {
+     struct ValueType *ReturnType;   /* the return value type */
+@@ -180,7 +181,12 @@ struct FuncDef
+     int VarArgs;                    /* has a variable number of arguments after the explicitly specified ones */
+     struct ValueType **ParamType;   /* array of parameter types */
+     char **ParamName;               /* array of parameter names */
+-    void (*Intrinsic)();            /* intrinsic call address or NULL */
++    void (*Intrinsic)(              /* intrinsic call address or NULL */
++        struct ParseState *Parser,
++        Value *ReturnValue,
++        Value **ParamArray,
++        int ArgCount
++    );
+     struct ParseState Body;         /* lexical tokens of the function body if not intrinsic */
+ };
+ 
+@@ -610,8 +616,8 @@ void IncludeFile(Picoc *pc, char *Filename);
+  * void PicocIncludeAllSystemHeaders(); */
+  
+ /* debug.c */
+-void DebugInit();
+-void DebugCleanup();
++void DebugInit(Picoc *pc);
++void DebugCleanup(Picoc *pc);
+ void DebugCheckStatement(struct ParseState *Parser);
+ 
+ 
+--- a/platform/library_unix.c
++++ b/platform/library_unix.c
+@@ -1,6 +1,6 @@
+ #include "../interpreter.h"
+ 
+-void UnixSetupFunc()
++void UnixSetupFunc(Picoc *pc)
+ {    
+ }
+ 

pkgs/by-name/pi/picoc/package.nix

@@ -18,6 +18,8 @@ stdenv.mkDerivation {
 
   buildInputs = [ readline ];
 
+  patches = [ ./gcc15-fixes.patch ];
+
   makeFlags = [ "CC=${stdenv.cc.targetPrefix}cc" ];
 
   env.NIX_CFLAGS_COMPILE = toString (