Kernel is now in C++ :)

config.sh

@@ -7,6 +7,7 @@ export HOST=${HOST:-$(./default-host.sh)}
 export AR=${HOST}-ar
 export AS=${HOST}-as
 export CC=${HOST}-gcc
+export CXX=${HOST}-g++
  
 export PREFIX=/usr
 export EXEC_PREFIX=$PREFIX
@@ -20,9 +21,11 @@ export CPPFLAGS=''
 # Configure the cross-compiler to use the desired system root.
 export SYSROOT="$(pwd)/sysroot"
 export CC="$CC --sysroot=$SYSROOT"
+export CXX="$CXX --sysroot=$SYSROOT"
  
 # Work around that the -elf gcc targets doesn't have a system include directory
 # because it was configured with --without-headers rather than --with-sysroot.
 if echo "$HOST" | grep -Eq -- '-elf($|-)'; then
   export CC="$CC -isystem=$INCLUDEDIR"
+  export CXX="$CXX -isystem=$INCLUDEDIR"
 fi

kernel/Makefile

@@ -62,6 +62,9 @@ $(ARCHDIR)/crtbegin.o $(ARCHDIR)/crtend.o:
 .c.o:
 	$(CC) -MD -c $< -o $@ -std=gnu11 $(CFLAGS) $(CPPFLAGS)
  
+.cpp.o:
+	$(CXX) -MD -c $< -o $@ $(CFLAGS) $(CPPFLAGS)
+ 
 .S.o:
 	$(CC) -MD -c $< -o $@ $(CFLAGS) $(CPPFLAGS)
  

kernel/arch/i386/crti.s

@@ -13,4 +13,4 @@ _init:
 _fini:
 	push %ebp
 	movl %esp, %ebp
-	/* gcc will nicely put the contents of crtbegin.o's .fini section here. */
+	/* gcc will nicely put the contents of crtbegin.o's .fini section here. */

kernel/arch/i386/crtn.s

@@ -7,4 +7,4 @@
 .section .fini
 	/* gcc will nicely put the contents of crtend.o's .fini section here. */
 	popl %ebp
-	ret
+	ret

kernel/arch/i386/tty.c

@@ -29,7 +29,7 @@ void terminal_clear(void)
 			terminal_putentryat(' ', terminal_color, x, y);
 }
 
-void terminal_initialize(void)
+void terminal_initialize()
 {
 	terminal_row = 0;
 	terminal_col = 0;

kernel/include/kernel/tty.h

@@ -2,7 +2,15 @@
 
 #include <stddef.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void terminal_initialize(void);
 void terminal_putchar(char c);
 void terminal_write(const char* data, size_t size);
-void terminal_writestring(const char* data);
+void terminal_writestring(const char* data);
+
+#ifdef __cplusplus
+}
+#endif

kernel/kernel/kernel.cpp

@@ -2,6 +2,7 @@
 
 #include <stdio.h>
 
+extern "C"
 void kernel_main()
 {
 	terminal_initialize();