diff --git a/libtcc/include/tcc.h b/libtcc/include/tcc.h
index 60545069..7cc68146 100644
--- a/libtcc/include/tcc.h
+++ b/libtcc/include/tcc.h
@@ -33,41 +33,17 @@
 # undef __attribute__
 #endif
 
+#include <stdint.h>
 #include <string.h>
 #include <fcntl.h>
 #include <setjmp.h>
 #include <time.h>
 
-#ifndef _WIN32
-# include <unistd.h>
-# include <sys/time.h>
+#include <unistd.h>
+#include <sys/time.h>
 /* XXX: need to define this to use them in non ISOC99 context */
 extern float strtof (const char *__nptr, char **__endptr);
 extern long double strtold (const char *__nptr, char **__endptr);
-#endif
-
-#ifdef _WIN32
-# define WIN32_LEAN_AND_MEAN 1
-# include <windows.h>
-# include <io.h> /* open, close etc. */
-# include <direct.h> /* getcwd */
-# include <malloc.h> /* alloca */
-# ifdef __GNUC__
-#  include <stdint.h>
-# endif
-# define inline __inline
-# define snprintf _snprintf
-# define vsnprintf _vsnprintf
-# ifndef __GNUC__
-#  define strtold (long double)strtod
-#  define strtof (float)strtod
-#  define strtoll _strtoi64
-#  define strtoull _strtoui64
-# endif
-# ifndef va_copy
-#  define va_copy(a,b) a = b
-# endif
-#endif
 
 #ifndef O_BINARY
 # define O_BINARY 0
@@ -92,7 +68,7 @@ extern long double strtold (const char *__nptr, char **__endptr);
 #ifndef CONFIG_SYSROOT
 # define CONFIG_SYSROOT ""
 #endif
-#if !defined CONFIG_TCCDIR && !defined _WIN32
+#if !defined CONFIG_TCCDIR
 # define CONFIG_TCCDIR "/usr/local/lib/tcc"
 #endif
 #ifndef CONFIG_LDDIR
@@ -793,9 +769,6 @@ void tcc_add_pragma_libs(TCCState *s1);
 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *f);
 PUB_FUNC void tcc_print_stats(TCCState *s, unsigned total_time);
 char *tcc_load_text(int fd);
-#ifdef _WIN32
-char *normalize_slashes(char *path);
-#endif
 /* for #pragma once */
 int normalized_PATHCMP(const char *f1, const char *f2);
 
diff --git a/libtcc/include/tcc/path.h b/libtcc/include/tcc/path.h
index 1152cc0e..0c0657c4 100644
--- a/libtcc/include/tcc/path.h
+++ b/libtcc/include/tcc/path.h
@@ -1,15 +1,13 @@
 #ifndef TCC_PATH_H
 # define TCC_PATH_H 1
 
-#ifdef _WIN32
-# define IS_DIRSEP(c) (c == '/' || c == '\\')
-# define IS_ABSPATH(p) (IS_DIRSEP(p[0]) || (p[0] && p[1] == ':' && IS_DIRSEP(p[2])))
-# define PATHCMP stricmp
-# define PATHSEP ";"
-#else
 # define IS_DIRSEP(c) (c == '/')
 # define IS_ABSPATH(p) IS_DIRSEP(p[0])
 # define PATHCMP strcmp
+
+#ifdef _WIN32
+# define PATHSEP ";"
+#else
 # define PATHSEP ":"
 #endif
 
diff --git a/libtcc/libtcc.c b/libtcc/libtcc.c
index d135b5d5..8a8ac9ea 100644
--- a/libtcc/libtcc.c
+++ b/libtcc/libtcc.c
@@ -22,6 +22,8 @@
 # include "config.h"
 #endif /* HAVE_CONFIG_H */
 
+#include <stdlib.h>
+
 #include <tcc.h>
 #include <tcc/path.h>
 #include <tcc/memory.h>
@@ -37,36 +39,6 @@ struct TCCState *tcc_state;
 void** stk_data;
 int nb_stk_data;
 
-/********************************************************/
-#ifdef _WIN32
-char *normalize_slashes(char *path)
-{
-    char *p;
-    for (p = path; *p; ++p)
-        if (*p == '\\')
-            *p = '/';
-    return path;
-}
-
-#define tcc_module NULL /* NULL means executable itself */
-
-#ifndef CONFIG_TCCDIR
-/* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
-static inline char *config_tccdir_w32(char *path)
-{
-    char *p;
-    GetModuleFileNameA(tcc_module, path, MAX_PATH);
-    p = tcc_basename(normalize_slashes(strlwr(path)));
-    if (p > path)
-        --p;
-    *p = 0;
-    return path;
-}
-#define CONFIG_TCCDIR config_tccdir_w32(alloca(MAX_PATH))
-#endif
-
-#endif
-
 /********************************************************/
 
 PUB_FUNC void tcc_enter_state(TCCState *s1)
@@ -316,9 +288,7 @@ void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
     bf->buf_end = bf->buffer + initlen;
     bf->buf_end[0] = CH_EOB; /* put eob symbol */
     pstrcpy(bf->filename, sizeof(bf->filename), filename);
-#ifdef _WIN32
-    normalize_slashes(bf->filename);
-#endif
+
     bf->true_filename = bf->filename;
     bf->line_num = 1;
     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
diff --git a/libtcc/tccasm.c b/libtcc/tccasm.c
index c3ed7e91..245697a3 100644
--- a/libtcc/tccasm.c
+++ b/libtcc/tccasm.c
@@ -20,6 +20,9 @@
 #ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif /* HAVE_CONFIG_H */
+
+#include <stdlib.h>
+
 #define USING_GLOBALS
 #include "tcc.h"
 #include "utils/string.h"
diff --git a/libtcc/tccelf.c b/libtcc/tccelf.c
index 9c7da476..a4b0ff1f 100644
--- a/libtcc/tccelf.c
+++ b/libtcc/tccelf.c
@@ -22,6 +22,8 @@
 # include "config.h"
 #endif /* HAVE_CONFIG_H */
  
+#include <stdlib.h>
+
 #include <tcc.h>
 #include <tcc/path.h>
 #include <tcc/memory.h>
diff --git a/libtcc/tccgen.c b/libtcc/tccgen.c
index d6fae0f2..16b975c1 100644
--- a/libtcc/tccgen.c
+++ b/libtcc/tccgen.c
@@ -22,6 +22,7 @@
 # include "config.h"
 #endif /* HAVE_CONFIG_H */
 
+#include <stdlib.h>
 
 #define USING_GLOBALS
 #include <tcc.h>
diff --git a/libtcc/tccpp.c b/libtcc/tccpp.c
index e1ef80be..31a9a4db 100644
--- a/libtcc/tccpp.c
+++ b/libtcc/tccpp.c
@@ -22,6 +22,8 @@
 # include "config.h"
 #endif /* HAVE_CONFIG_H */
 
+#include <stdlib.h>
+
 #define USING_GLOBALS
 #include <tcc.h>
 #include <tcc/path.h>
@@ -551,12 +553,7 @@ const char *get_tok_str(int v, CValue *cv)
     case TOK_CULONG:
     case TOK_CLLONG:
     case TOK_CULLONG:
-        /* XXX: not quite exact, but only useful for testing  */
-#ifdef _WIN32
-        sprintf(p, "%u", (unsigned)cv->i);
-#else
         sprintf(p, "%llu", (unsigned long long)cv->i);
-#endif
         break;
     case TOK_LCHAR:
         cstr_ccat(&cstr_buf, 'L');
@@ -1622,11 +1619,7 @@ static CachedInclude *search_cached_include(TCCState *s1, const char *filename,
     s = basename = tcc_basename(filename);
     h = TOK_HASH_INIT;
     while ((c = (unsigned char)*s) != 0) {
-#ifdef _WIN32
-        h = TOK_HASH_FUNC(h, toup(c));
-#else
         h = TOK_HASH_FUNC(h, c);
-#endif
         s++;
     }
     h &= (CACHED_INCLUDES_HASH_SIZE - 1);
@@ -1786,9 +1779,6 @@ void tccpp_putfile(const char *filename)
         *tcc_basename(buf) = 0;
     }
     pstrcat(buf, sizeof buf, filename);
-#ifdef _WIN32
-    normalize_slashes(buf);
-#endif
     if (0 == strcmp(file->filename, buf))
         return;
     //printf("new file '%s'\n", buf);
diff --git a/tcc/tcc.c b/tcc/tcc.c
index c6481f9d..c60eb955 100644
--- a/tcc/tcc.c
+++ b/tcc/tcc.c
@@ -174,13 +174,9 @@ static char
 static unsigned
 getclock_ms(void)
 {
-#ifdef _WIN32
-	return GetTickCount();
-#else
 	struct timeval tv;
 	gettimeofday(&tv, NULL);
 	return tv.tv_sec*1000 + (tv.tv_usec+500)/1000;
-#endif
 }
 
 int
diff --git a/tcc/tcctools.c b/tcc/tcctools.c
index c87f38e7..620f6e8b 100644
--- a/tcc/tcctools.c
+++ b/tcc/tcctools.c
@@ -28,6 +28,8 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
+#include <stdlib.h>
+
 #include <tcc.h>
 #include <tcc/path.h>
 #include <tcc/object/archive.h>