trying some preprocessor platform detection

Makefile

@@ -9,10 +9,7 @@ LIBTARGET = lib$(NAME)
 LLTDIR = llt
 LLT = $(LLTDIR)/libllt.a
 
-# OS flags: LINUX, WIN32, MACOSX
-# architecture flags: __CPU__=xxx, BITS64, ARCH_X86, ARCH_X86_64
-CONFIG = -DLINUX -DARCH_X86_64 -DBITS64 -D__CPU__=686
-FLAGS = -falign-functions -Wall -Wno-strict-aliasing -I$(LLTDIR) $(CFLAGS) -DUSE_COMPUTED_GOTO $(CONFIG)
+FLAGS = -falign-functions -Wall -Wno-strict-aliasing -I$(LLTDIR) $(CFLAGS) -DUSE_COMPUTED_GOTO
 LIBFILES = $(LLT)
 LIBS = $(LIBFILES) -lm
 

llt/Makefile

@@ -7,10 +7,7 @@ OBJS = $(SRCS:%.c=%.o)
 DOBJS = $(SRCS:%.c=%.do)
 TARGET = libllt.a
 
-# OS flags: LINUX, WIN32, MACOSX
-# architecture flags: __CPU__=xxx, BITS64, ARCH_X86, ARCH_X86_64
-CONFIG = -DLINUX -DARCH_X86_64 -DBITS64 -D__CPU__=686
-FLAGS = -Wall -Wno-strict-aliasing $(CFLAGS) $(CONFIG)
+FLAGS = -Wall -Wno-strict-aliasing $(CFLAGS)
 LIBS =
 
 DEBUGFLAGS = -g -DDEBUG $(FLAGS)

llt/dtypes.h

@@ -16,9 +16,33 @@
   We assume the LP64 convention for 64-bit platforms.
 */
 
-#ifdef WIN32
+
+#if defined(__gnu_linux__)
+#  define LINUX
+#elif defined(__APPLE__) && defined(__MACH__)
+#  define MACOSX
+#elif defined(_WIN32)
+#  define WIN32
+#else
+#  error "unknown platform"
+#endif
+
+
+#ifndef __SIZEOF_POINTER__
+#  error "__SIZEOF_POINTER__ undefined"
+#endif
+#if( 8 == __SIZEOF_POINTER__ )
+#  define BITS64
+#elif( 4 == __SIZEOF_POINTER__ )
+#  define BITS32
+#else
+#  error "this is one weird machine"
+#endif
+
+
+#if defined(WIN32)
 #  define STDCALL __stdcall
-# ifdef IMPORT_EXPORTS
+#  if defined(IMPORT_EXPORTS)
 #    define DLLEXPORT __declspec(dllimport)
 #  else
 #    define DLLEXPORT __declspec(dllexport)
@@ -28,24 +52,20 @@
 #  define DLLEXPORT __attribute__ ((visibility("default")))
 #endif
 
-#ifdef LINUX
+#if defined(LINUX)
 #  include <features.h>
 #  include <endian.h>
 #  define LITTLE_ENDIAN  __LITTLE_ENDIAN
 #  define BIG_ENDIAN     __BIG_ENDIAN
 #  define PDP_ENDIAN     __PDP_ENDIAN
 #  define BYTE_ORDER     __BYTE_ORDER
-#endif
-
-#ifdef MACOSX
+#elif defined(MACOSX)
 #  include <machine/endian.h>
 #  define __LITTLE_ENDIAN  LITTLE_ENDIAN
 #  define __BIG_ENDIAN     BIG_ENDIAN
 #  define __PDP_ENDIAN     PDP_ENDIAN
 #  define __BYTE_ORDER     BYTE_ORDER
-#endif
-
-#ifdef WIN32
+#elif defined(WIN32)
 #  define __LITTLE_ENDIAN	1234
 #  define __BIG_ENDIAN	4321
 #  define __PDP_ENDIAN	3412
@@ -55,8 +75,11 @@
 #  define BIG_ENDIAN     __BIG_ENDIAN
 #  define PDP_ENDIAN     __PDP_ENDIAN
 #  define BYTE_ORDER     __BYTE_ORDER
+#else
+#  error "unknown platform"
 #endif
 
+
 #ifdef BOEHM_GC
 // boehm GC allocator
 #include <gc.h>

llt/utils.h

@@ -1,6 +1,33 @@
 #ifndef __UTILS_H_
 #define __UTILS_H_
 
+
+#if defined( __amd64__ ) || defined( _M_AMD64 )
+#  define ARCH_X86_64
+#  define __CPU__ 686
+#elif defined( _M_IX86 )//msvs, intel, digital mars, watcom
+#  if ! defined( __386__ )
+#    error "unsupported target: 16-bit x86"
+#  endif
+#  define ARCH_X86
+#  define __CPU__  ( _M_IX86 + 86 )
+#elif defined( __i686__ )//gnu c
+#  define ARCH_X86
+#  define __CPU__ 686
+#elif defined( __i586__ )//gnu c
+#  define ARCH_X86
+#  define __CPU__ 586
+#elif defined( __i486__ )//gnu c
+#  define ARCH_X86
+#  define __CPU__ 486
+#elif defined( __i386__ )//gnu c
+#  define ARCH_X86
+#  define __CPU__ 386
+#else
+#  error "unknown architecture"
+#endif
+
+
 char *uint2str(char *dest, size_t len, uint64_t num, uint32_t base);
 int str2int(char *str, size_t len, int64_t *res, uint32_t base);
 int isdigit_base(char c, int base);

string.c

@@ -47,6 +47,14 @@ value_t fl_string_count(value_t *args, u_int32_t nargs)
     return size_wrap(u8_charnum(str+start, stop-start));
 }
 
+
+#if defined( __WIN32__ ) || defined( __linux__ )
+extern int wcwidth( wchar_t );
+#else
+#  error "I need int wcwidth( wchar_t );"
+#endif
+
+
 value_t fl_string_width(value_t *args, u_int32_t nargs)
 {
     argcount("string.width", nargs, 1);