diff --git a/Makefile b/Makefile
index 70475df..a9f198d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,10 @@
 PREFIX=/usr/local
 TEST_CFLAGS=-D_QRINTF_COUNT_CALL=1 -Wall -g -Werror
+AOUT=./test
+ifeq (Windows_NT, $(OS))
+#AOUT=.\\\test.exe
+AOUT=".\test.exe"
+endif
 
 all:
 
@@ -15,9 +20,9 @@ install:
 test: test-cc test-cxx
 
 test-cc:
-	bin/qrintf $(CC)  $(TEST_CFLAGS) t/test.c deps/picotest/picotest.c -o ./test && ./test
+	perl bin/qrintf $(CC) $(TEST_CFLAGS) t/test.c deps/picotest/picotest.c -o $(AOUT) && $(AOUT)
 
 test-cxx:
-	bin/qrintf $(CXX) -x c++ $(TEST_CFLAGS) t/test.c deps/picotest/picotest.c -o ./test && ./test
+	perl bin/qrintf $(CXX) -x c++ $(TEST_CFLAGS) t/test.c deps/picotest/picotest.c -o $(AOUT) && $(AOUT)
 
 .PHONY: gen install test test-cc test-cxx
diff --git a/bin/qrintf b/bin/qrintf
index 4b91eff..9402728 100755
--- a/bin/qrintf
+++ b/bin/qrintf
@@ -25,7 +25,7 @@ use warnings;
 use Digest::SHA qw(sha1_hex);
 use File::Basename qw(basename dirname);
 use File::Temp qw(tempdir);
-use POSIX qw(WIFEXITED WEXITSTATUS WTERMSIG);
+use File::Spec::Functions qw(rel2abs);
 
 my %EXT = (
     c  => 'i',
@@ -42,14 +42,16 @@ if (@ARGV && $ARGV[0] eq '--version') {
     exit 0;
 }
 
-my $pwd = dirname($0);
+my $pwd = dirname(rel2abs($0));
 
 my $cc = shift @ARGV;
 
 if (basename($cc) =~ m{^g(?:cc|\+\+)}) {
     # is GCC, use "-wrapper"
-    exec "$cc", qw(-no-integrated-cpp -wrapper), "$pwd/../share/qrintf/gcc-wrapper", @ARGV;
-    die "failed to exec $cc:$!";
+    if (system("$cc", qw(-no-integrated-cpp -wrapper), "$pwd/../share/qrintf/gcc-wrapper", @ARGV) != 0) {
+        die "failed to exec $cc:$!";
+    }
+    exit 0;
 } else {
     # mimic GCC's "-no-integrated-cpp -wrapper"
 
@@ -87,6 +89,7 @@ if (basename($cc) =~ m{^g(?:cc|\+\+)}) {
     # preprocess the source files
     for my $fn (@files) {
         run_cmd(
+            $^X,
             "$pwd/../share/qrintf/gcc-wrapper",
             $cc, '-E',
             (grep { $_ ne '-c' } @ARGV),
@@ -112,10 +115,10 @@ sub run_cmd {
     system(@argv) == 0 and return;
     if ($? == -1) {
         die "failed to exec $argv[0]:$!";
-    } elsif (WIFEXITED($?)) {
-        exit WEXITSTATUS($?);
+    } elsif ($? & 255) {
+        exit $? >> 8;
     } else {
-        die "$argv[0] exitted due to signal @{[WTERMSIG($?)]}\n";
+        die "$argv[0] exitted due to signal @{[$? & 255]}\n";
     }
 }
 
diff --git a/bin/qrintf-pp b/bin/qrintf-pp
index e0f8535..008d8e9 100755
--- a/bin/qrintf-pp
+++ b/bin/qrintf-pp
@@ -27,7 +27,7 @@ use File::Basename qw(dirname);
 
 if (@ARGV && $ARGV[0] eq '--version') {
     my $cmd = dirname($0) . "/qrintf";
-    exec $cmd, "--version";
+    exec $^X, $cmd, "--version";
     die "failed to execute: $cmd:$!";
 }
 
diff --git a/include/qrintf.h b/include/qrintf.h
index 95c1a35..33a4fb3 100644
--- a/include/qrintf.h
+++ b/include/qrintf.h
@@ -45,8 +45,10 @@ extern "C" {
 
 #undef sprintf
 #define sprintf(...) _qp_sprintf(__VA_ARGS__)
-#undef snprintf
-#define snprintf(...) _qp_snprintf(__VA_ARGS__)
+#ifndef _WIN32
+# undef snprintf
+# define snprintf(...) _qp_snprintf(__VA_ARGS__)
+#endif
 
 #if _QRINTF_COUNT_CALL
 extern size_t _qrintf_call_cnt;
diff --git a/share/qrintf/gcc-wrapper b/share/qrintf/gcc-wrapper
index ca1865f..d60cea1 100755
--- a/share/qrintf/gcc-wrapper
+++ b/share/qrintf/gcc-wrapper
@@ -26,8 +26,10 @@ use File::Basename qw(dirname);
 use POSIX qw(WIFEXITED WEXITSTATUS);
 
 if (! grep { $_ eq '-E' } @ARGV) {
-    exec @ARGV;
-    die "failed to exec $ARGV[0]:$!";
+    if (system(@ARGV) != 0) {
+        die "failed to exec $ARGV[0]:$!";
+    }
+    exit 0;
 }
 
 my $pwd = dirname($0);
@@ -35,7 +37,7 @@ my $pwd = dirname($0);
 # invoke cpp
 my ($cpp_cmd, @cpp_args) = @ARGV;
 system($cpp_cmd, '-DQRINTF=1', '-include', "$pwd/../../include/qrintf.h", @cpp_args) == 0
-    or exit(WIFEXITED($?) ? WEXITSTATUS($?) : 1);
+    or exit($? >> 8 ? $? >> 8 : 1);
 
 # read the source file
 my $src_fn = $ARGV[$#ARGV];
@@ -45,8 +47,8 @@ my $src = do {
 };
 
 # filter and print
-open my $fh, "| $pwd/../../bin/qrintf-pp > $src_fn"
+open my $fh, "| $^X $pwd/../../bin/qrintf-pp > $src_fn"
     or die "failed to invoke $pwd/qrintf-pp:$!";
 print $fh $src;
 close $fh
-    or exit(WIFEXITED($?) ? WEXITSTATUS($?) : 1);
+    or exit($? >> 8 ? $? >> 8 : 1);
diff --git a/t/test.c b/t/test.c
index bde4171..defb826 100644
--- a/t/test.c
+++ b/t/test.c
@@ -112,19 +112,25 @@ static void test_simple(void)
     CHECK_MULTI(unsigned , "%u", 0, UINT_MAX);
     CHECK_MULTI(unsigned long, "%lu", 0, ULONG_MAX);
     CHECK_MULTI(unsigned long long, "%llu", 0, ULLONG_MAX);
+#ifndef _WIN32
     CHECK_MULTI(size_t, "%zu", 0, SIZE_MAX);
+#endif
 
     CHECK_MULTI(unsigned short, "%hx", 0, USHRT_MAX);
     CHECK_MULTI(unsigned , "%x", 0, UINT_MAX);
     CHECK_MULTI(unsigned long, "%lx", 0, ULONG_MAX);
     CHECK_MULTI(unsigned long long, "%llx", 0, ULLONG_MAX);
+#ifndef _WIN32
     CHECK_MULTI(size_t, "%zx", 0, SIZE_MAX);
+#endif
 
     CHECK_MULTI(unsigned short, "%hX", 0, USHRT_MAX);
     CHECK_MULTI(unsigned , "%X", 0, UINT_MAX);
     CHECK_MULTI(unsigned long, "%lX", 0, ULONG_MAX);
     CHECK_MULTI(unsigned long long, "%llX", 0, ULLONG_MAX);
+#ifndef _WIN32
     CHECK_MULTI(size_t, "%zX", 0, SIZE_MAX);
+#endif
 
     CHECK_MULTI(int, "%7d", INT_MIN, INT_MAX);
     CHECK_MULTI(int, "%07d", INT_MIN, INT_MAX);
@@ -133,6 +139,7 @@ static void test_simple(void)
     CHECK_MULTI(unsigned, "%7x", 0, UINT_MAX);
     CHECK_MULTI(unsigned, "%07x", 0, UINT_MAX);
 
+#ifndef _WIN32
     CHECK_SNPRINTF(8, "%s", "abcdef"); /* below the bounds */
     CHECK_SNPRINTF(8, "1234%s", "abcdef"); /* partial write */
     CHECK_SNPRINTF(8, "1234567890%s", "abcdef"); /* no write */
@@ -145,6 +152,7 @@ static void test_simple(void)
     CHECK_SNPRINTF(3, "%x",   UINT_MAX);
     CHECK_SNPRINTF(3, "%lx",  ULONG_MAX);
     CHECK_SNPRINTF(3, "%llx", ULLONG_MAX);
+#endif
 }
 
 static void test_composite(void)