NetBSD support [Thomas Klausner]

Not for whatsnew: I added -Wno-conversion unconditionally to disable the 
warnings Thomas reported.  That setting is the default for GCC out-of-the-box 
but apparently not on NetBSD.  As far as I know it shouldn't cause a problem 
with any GCC version back to at least 4.0.0 so we're safe even on PPC OSX, 
but do let me know if hilarity ensues.

makefile

@@ -86,6 +86,9 @@ endif
 ifeq ($(firstword $(filter GNU/kFreeBSD,$(UNAME))),GNU/kFreeBSD)
 TARGETOS = freebsd
 endif
+ifeq ($(firstword $(filter NetBSD,$(UNAME))),NetBSD)
+TARGETOS = netbsd
+endif
 ifeq ($(firstword $(filter OpenBSD,$(UNAME))),OpenBSD)
 TARGETOS = openbsd
 endif
@@ -470,7 +473,8 @@ CCOMFLAGS += \
 	-Wundef \
 	-Wformat-security \
 	-Wwrite-strings \
-	-Wno-sign-compare
+	-Wno-sign-compare \
+	-Wno-conversion
 
 # warnings only applicable to C compiles
 CONLYFLAGS += \

src/emu/debug/debugcpu.c

@@ -51,7 +51,7 @@
 #include "xmlfile.h"
 #include <ctype.h>
 #include <zlib.h>
-#if defined(SDLMAME_FREEBSD) || defined(SDLMAME_OS2)
+#if defined(SDLMAME_FREEBSD) || defined(SDLMAME_NETBSD) || defined(SDLMAME_OS2)
 # undef tolower
 #endif
 

src/emu/emucore.h

@@ -686,6 +686,7 @@ inline void fatalerror_exitcode(running_machine *machine, int exitcode, const ch
 //**************************************************************************
 
 // population count
+#ifndef SDLMAME_NETBSD
 inline int popcount(UINT32 val)
 {
 	int count;
@@ -694,6 +695,7 @@ inline int popcount(UINT32 val)
 		val &= val - 1;
 	return count;
 }
+#endif
 
 
 // convert a series of 32 bits into a float

src/lib/util/astring.h

@@ -296,6 +296,10 @@ INLINE astring *astring_assemble_5(astring *dst, const char *src1, const char *s
 ***************************************************************************/
 
 #ifdef __cplusplus
+#ifdef SDLMAME_NETBSD
+#undef toupper
+#undef tolower
+#endif
 
 /* derived class for C++ */
 class astring : public astring_base

src/osd/sdl/sdlsync_ntc.c

@@ -2,7 +2,7 @@
 //
 //  sdlsync.c - SDL core synchronization functions
 //
-//  Copyright (c) 1996-2010, Nicola Salmoria and the MAME Team.
+//  Copyright (c) 1996-2011, Nicola Salmoria and the MAME Team.
 //  Visit http://mamedev.org for licensing and usage restrictions.
 //
 //  SDLMAME by Olivier Galibert and R. Belmont
@@ -20,6 +20,11 @@
 #include <signal.h>
 #endif
 
+#ifdef SDLMAME_NETBSD
+/* for SIGKILL */
+#include <signal.h>
+#endif
+
 // standard C headers
 #include <math.h>
 #include <unistd.h>