Update the makefile for building on modern *nix systems. Rename to "Makefile" so we can build with just "make."

Also remove an unused variable that clang was warning about.

Makefile

@@ -60,9 +60,8 @@ INCLUDES = -I include -I shell -I libbb
 DEFINES = -Dhush_main=main -DNDEBUG
 LIBS = -ltermcap
 
-OCC_FLAGS = -i -w -a0
-# Add $(OCC_FLAGS) to CFLAGS on dmake
-CFLAGS = $(null, $(OCC_FLAGS))
+# CFLAGS suitable for clang or GCC
+CFLAGS = -std=c89 -funsigned-char -Wall -Wno-comment -Wno-format-security
 
 PROG = hush
 

build.gcc

@@ -1,4 +0,0 @@
-#!/bin/sh
-
-# Make with appropriate flags for gcc or clang on modern *nix systems
-make -f Makefile.gmake CFLAGS="-std=c89 -funsigned-char -Wall -Wno-format-security -Wno-comment"

libbb/xfunc.die.c

@@ -19,8 +19,6 @@ jmp_buf die_jmp;
 
 void FAST_FUNC xfunc_die(void)
 {
-	int forked;
-
 	if (die_sleep) {
 		if ((ENABLE_FEATURE_PREFER_APPLETS || ENABLE_HUSH)
 		 && die_sleep < 0