File nethack-gcc15-1.patch of Package nethack

Index: nethack-3.4.3/include/system.h
===================================================================
--- nethack-3.4.3.orig/include/system.h
+++ nethack-3.4.3/include/system.h
@@ -57,7 +57,11 @@ typedef long	off_t;
 #endif
 #ifndef SIG_RET_TYPE
 # if defined(NHSTDC) || defined(POSIX_TYPES) || defined(OS2) || defined(__DECC)
-#  define SIG_RET_TYPE void (*)()
+#  if defined(__GLIBC__) && defined(__GNUC__)
+#   define SIG_RET_TYPE __sighandler_t
+#  else
+#   define SIG_RET_TYPE void (*)()
+#  endif
 # endif
 #endif
 #ifndef SIG_RET_TYPE
@@ -87,8 +91,10 @@ E int FDECL(srandom, (unsigned int));
 #  endif
 # endif
 #else
+#ifndef __GLIBC__
 E long lrand48();
 E void srand48();
+#endif
 #endif /* BSD || ULTRIX || RANDOM */
 
 #if !defined(BSD) || defined(ultrix)
@@ -342,6 +348,7 @@ E char *FDECL(memset, (char*,int,int));
 # endif /* TOS */
 #endif /* MICRO */
 
+#ifndef __GLIBC__
 #if defined(BSD) && defined(ultrix)	/* i.e., old versions of Ultrix */
 E void sleep();
 #endif
@@ -351,6 +358,7 @@ E unsigned sleep();
 #if defined(HPUX)
 E unsigned int FDECL(sleep, (unsigned int));
 #endif
+#endif
 #ifdef VMS
 E int FDECL(sleep, (unsigned));
 #endif
@@ -501,7 +509,11 @@ E char *FDECL(tgoto, (const char *,int,i
 #else
 # if ! (defined(HPUX) && defined(_POSIX_SOURCE))
 E int FDECL(tgetent, (char *,const char *));
+#if !(defined(__GLIBC__) && defined(__GNUC__))
 E void FDECL(tputs, (const char *,int,int (*)()));
+#else
+E int tputs(const char *, int, int (*)(int));
+#endif
 # endif
 E int FDECL(tgetnum, (const char *));
 E int FDECL(tgetflag, (const char *));
Index: nethack-3.4.3/sys/unix/Makefile.src
===================================================================
--- nethack-3.4.3.orig/sys/unix/Makefile.src
+++ nethack-3.4.3/sys/unix/Makefile.src
@@ -124,7 +124,7 @@ SYSOBJ = ioctl.o unixmain.o unixtty.o un
 
 # flags for Linux
 #   compile normally
-# CFLAGS = -O2 -fomit-frame-pointer -I../include
+# CFLAGS = -O2 -fomit-frame-pointer -I../include -Wno-old-style-definition -Wno-unused-result -Wno-format-overflow
 # LFLAGS = -L/usr/X11R6/lib
 #   OR compile backwards compatible a.out format
 # CFLAGS = -O2 -b i486-linuxaout -fomit-frame-pointer -I../include