adding hash code, removing cross-comp invokation

Makefile

@@ -1,6 +1,6 @@
-GCC = i386-elf-gcc -O0
-GPP = i386-elf-g++ -O0 -c -nostdlib -nostartfiles -nodefaultlibs -fno-builtin -fno-exceptions -fno-rtti -fno-stack-protector
-LD = i386-elf-ld
+GCC = gcc -O0
+GPP = g++ -O0 -c -nostdlib -nostartfiles -nodefaultlibs -fno-builtin -fno-exceptions -fno-rtti -fno-stack-protector
+LD = ld
 QEMU = @qemu-system-i386
 objects = boot.o kernel.o console.o memory.o panic.o random.o itoa.o icxxabi.o hash.o \
           suite.o testframework.o teststring.o testcircularbuffer.o testdeque.o testvector.o testhashmap.o
@@ -32,7 +32,7 @@ panic.o: panic.cpp common.h
 random.o: random.cpp common.h
 	$(GPP) random.cpp
 
-hash.o: util/hash.cpp
+hash.o: util/hash.cpp util/hash.h
 	$(GPP) util/hash.cpp
 
 icxxabi.o: icxxabi.cpp icxxabi.h

kernel.cpp

@@ -3,7 +3,7 @@
 #include "common.h"
 #include "util/hashmap.h"
 
-#define CHECK_FLAG(flags,bit)   ((flags) & (1 << (bit)))
+#define CHECK_FLAG(flags,bit) ((flags) & (1 << (bit)))
 
 extern "C" unsigned long start_ctors, end_ctors, start_dtors, end_dtors;
 void test_all();

util/hash.cpp

@@ -0,0 +1,12 @@
+#include "hash.h"
+
+unsigned int hash_string(const char *s)
+{
+  int n = 0;
+  while (*s != 0)
+  {
+    n = n * 17 ^ *s;
+    ++s;
+  }
+  return n;
+}

util/hash.h

@@ -0,0 +1,3 @@
+#pragma once
+
+unsigned int hash_string(const char *s);