File kbuild-gcc15.patch of Package kbuild
--- kbuild-0.1.9998+svn3613/src/kmk/glob/fnmatch.c 2024-09-19 03:34:43.000000000 +0200
+++ kbuild-0.1.9998+svn3613/src/kmk/glob/fnmatch.c 2025-05-06 17:54:12.786646913 +0200
@@ -121,7 +121,8 @@
whose names are inconsistent. */
# if !defined _LIBC && !defined getenv && !defined _MSC_VER
-extern char *getenv ();
+/* getenv() is declared in stdlib.h */
+/* extern char *getenv (); */
# endif
# ifndef errno