Add patch for GCC 15

source-files/gcc-15.patch

@@ -0,0 +1,21 @@
+
+# HG changeset patch
+# User Marc Glisse <[email protected]>
+# Date 1738186682 -3600
+# Node ID 8e7bb4ae7a18b1405ea7f9cbcda450b7d920a901
+# Parent  e84c5c785bbe8ed8c3620194e50b65adfc2f5d83
+Complete function prototype in acinclude.m4 for C23 compatibility
+
+diff -r e84c5c785bbe -r 8e7bb4ae7a18 acinclude.m4
+--- a/acinclude.m4	Wed Dec 04 18:26:27 2024 +0100
++++ b/acinclude.m4	Wed Jan 29 22:38:02 2025 +0100
+@@ -609,7 +609,7 @@
+ 
+ #if defined (__GNUC__) && ! defined (__cplusplus)
+ typedef unsigned long long t1;typedef t1*t2;
+-void g(){}
++void g(int,t1 const*,t1,t2,t1 const*,int){}
+ void h(){}
+ static __inline__ t1 e(t2 rp,t2 up,int n,t1 v0)
+ {t1 c,x,r;int i;if(v0){c=1;for(i=1;i<n;i++){x=up[i];r=x+1;rp[i]=r;}}return c;}
+