GCC-14 in Debian Trixie i386 complains:

../../../../newlib-1.16.0/libgloss/i386/cygmon-gmon.c: In function '_mcount':
../../../../newlib-1.16.0/libgloss/i386/cygmon-gmon.c:227:14: error: type defaults to 'int' in declaration of '_etext' [-Wimplicit-int]
  227 |       extern _etext();
      |              ^~~~~~
../../../../newlib-1.16.0/libgloss/i386/cygmon-gmon.c:228:14: error: type defaults to 'int' in declaration of '_ftext' [-Wimplicit-int]
  228 |       extern _ftext();
      |              ^~~~~~

--- newlib-1.16.0/libgloss/i386/cygmon-gmon.c.orig	2025-08-09 22:48:09.864068481 +0100
+++ newlib-1.16.0/libgloss/i386/cygmon-gmon.c	2025-08-09 22:52:18.458393484 +0100
@@ -224,8 +224,8 @@
 
   if (! already_setup) 
     {
-      extern _etext();
-      extern _ftext();
+      extern char _etext[];
+      extern char _ftext[];
       already_setup = 1;
       monstartup(_ftext, _etext);
       atexit(_mcleanup);