diff --git a/Makefile b/Makefile
index 975bf67..6adf0b8 100644
--- a/Makefile
+++ b/Makefile
@@ -98,8 +98,14 @@ sunxi-fexc: fexc.h script.h script.c \
 	script_fex.h script_fex.c
 
 LIBUSB = libusb-1.0
-LIBUSB_CFLAGS = `pkg-config --cflags $(LIBUSB)`
-LIBUSB_LIBS = `pkg-config --libs $(LIBUSB)`
+LIBUSB_CFLAGS ?= `pkg-config --cflags $(LIBUSB)`
+LIBUSB_LIBS ?= `pkg-config --libs $(LIBUSB)`
+ifeq ($(OS),Windows_NT)
+	# Windows lacks mman.h / mmap()
+	DEFINES += -DNO_MMAP
+	# portable_endian.h relies on winsock2
+	LIBS += -lws2_32
+endif
 
 sunxi-fel: fel.c fel-to-spl-thunk.h progress.c progress.h
 	$(CC) $(CFLAGS) $(LIBUSB_CFLAGS) $(LDFLAGS) -o $@ $(filter %.c,$^) $(LIBS) $(LIBUSB_LIBS)
diff --git a/bootinfo.c b/bootinfo.c
index ea7d5e3..93b94d7 100644
--- a/bootinfo.c
+++ b/bootinfo.c
@@ -198,7 +198,7 @@ void print_boot_file_head(boot_file_head_t *hdr)
 
 void print_boot_dram_para(boot_dram_para_t *dram)
 {
-	pprintf(&dram->dram_baseaddr,	"DRAM base : %p\n", (void *)(long)dram->dram_baseaddr);
+	pprintf(&dram->dram_baseaddr,	"DRAM base : %p\n", (void *)(uintptr_t)dram->dram_baseaddr);
 	pprintf(&dram->dram_clk,	"DRAM clk  : %d\n", dram->dram_clk);
 	pprintf(&dram->dram_type,	"DRAM type : %d\n", dram->dram_type);
 	pprintf(&dram->dram_rank_num,	"DRAM rank : %d\n", dram->dram_rank_num);
diff --git a/fel.c b/fel.c
index 5d8a382..8e617bd 100644
--- a/fel.c
+++ b/fel.c
@@ -15,6 +15,10 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "common.h"
+#include "portable_endian.h"
+#include "progress.h"
+
 #include <libusb.h>
 #include <stdint.h>
 #include <stdbool.h>
@@ -28,10 +32,6 @@
 #include <unistd.h>
 #include <sys/stat.h>
 
-#include "common.h"
-#include "portable_endian.h"
-#include "progress.h"
-
 static const uint16_t AW_USB_VENDOR_ID  = 0x1F3A;
 static const uint16_t AW_USB_PRODUCT_ID = 0xEFE8;
 
@@ -325,7 +325,7 @@ void hexdump(void *data, uint32_t offset, size_t size)
 	unsigned char *buf = data;
 	for (j = 0; j < size; j+=16) {
 		size_t i;
-		printf("%08lx: ",(long int)offset + j);
+		printf("%08zx: ", offset + j);
 		for (i = 0; i < 16; i++) {
 			if (j + i < size)
 				printf("%02x ", buf[j+i]);
diff --git a/fexc.c b/fexc.c
index e90bd14..a1cc9cc 100644
--- a/fexc.c
+++ b/fexc.c
@@ -21,7 +21,9 @@
 #include <libgen.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/mman.h>
+#ifndef NO_MMAP
+  #include <sys/mman.h>
+#endif
 #include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
@@ -117,6 +119,7 @@ static inline int script_parse(enum script_format format,
 			pr_err("%s: %s: %s\n", filename,
 			       "fstat", strerror(errno));
 			goto bin_close;
+#ifndef NO_MMAP
 		} else if (S_ISREG(sb.st_mode)) {
 			/* regular file, mmap it */
 			bin = mmap(0, sb.st_size, PROT_READ, MAP_SHARED, in, 0);
@@ -127,6 +130,7 @@ static inline int script_parse(enum script_format format,
 			}
 			bin_size = sb.st_size;
 			allocated = 0;
+#endif
 		} else {
 			/* something else... just read it all! */
 			bin = read_all(in, filename, &bin_size);
@@ -138,10 +142,12 @@ static inline int script_parse(enum script_format format,
 		ret = script_decompile_bin(bin, bin_size, filename, script);
 		if (allocated)
 			free(bin);
+#ifndef NO_MMAP
 		else if (munmap(bin, bin_size) == -1) {
 			pr_err("%s: %s: %s\n", filename,
 			       "munmap", strerror(errno));
 		}
+#endif
 bin_close:
 		close(in);
 		}; break;
diff --git a/meminfo.c b/meminfo.c
index 86b5c1e..0b0ff23 100644
--- a/meminfo.c
+++ b/meminfo.c
@@ -25,6 +25,8 @@
 #include <sys/io.h>
 #include <stdbool.h>
 
+#include "common.h"
+
 typedef uint32_t u32;
 
 /* from u-boot code: */
@@ -412,7 +414,7 @@ sun4i_dram_para_print_fex(struct sun4i_dram_para *dram_para)
 static int
 sun4i_dram_para_print(bool uboot)
 {
-	struct sun4i_dram_para dram_para = {0};
+	struct sun4i_dram_para dram_para = { .baseaddr = 0 };
 	int ret;
 
 	ret = sunxi_dram_clock_read(&dram_para.clock);
@@ -710,6 +712,7 @@ sun8i_dram_regs_print(void)
 static void
 print_usage(const char *name)
 {
+	puts("sunxi-meminfo " VERSION "\n");
 	printf("Utility to retrieve DRAM information from registers on "
 	       "Allwinner SoCs.\n");
 	printf("\n");
diff --git a/nand-image-builder.c b/nand-image-builder.c
index db42690..964a142 100644
--- a/nand-image-builder.c
+++ b/nand-image-builder.c
@@ -257,7 +257,7 @@ static void encode_bch(struct bch_control *bch, const uint8_t *data,
 	}
 
 	/* process first unaligned data bytes */
-	m = ((unsigned long)data) & 3;
+	m = ((uintptr_t)data) & 3;
 	if (m) {
 		mlen = (len < (4-m)) ? len : 4-m;
 		encode_bch_unaligned(bch, data, mlen, bch->ecc_buf);
diff --git a/pio.c b/pio.c
index 3ecf912..4bcdc18 100644
--- a/pio.c
+++ b/pio.c
@@ -24,7 +24,9 @@
 #include <unistd.h>
 #include <stdlib.h>
 #include <errno.h>
-#include <sys/mman.h>
+#ifndef NO_MMAP
+  #include <sys/mman.h>
+#endif
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
@@ -365,6 +367,10 @@ int main(int argc, char **argv)
 	if (!in_name && !do_mmap)
 		usage(1);
 	if (do_mmap) {
+#ifdef NO_MMAP
+		errno = ENOSYS; /* Function not implemented */
+		perror("mmap PIO");
+#else
 		int pagesize = sysconf(_SC_PAGESIZE);
 		int fd = open("/dev/mem",O_RDWR);
 		int addr = 0x01c20800 & ~(pagesize-1);
@@ -380,6 +386,7 @@ int main(int argc, char **argv)
 		}
 		close(fd);
 		buf += offset;
+#endif
 	}
 	if (in_name) {
 		if (strcmp(in_name, "-") == 0) {