diff -u squashfs4.2/squashfs-tools/mksquashfs.c squashfs4.2_fix/squashfs-tools/mksquashfs.c
--- squashfs4.2/squashfs-tools/mksquashfs.c	2011-02-28 23:24:10.000000000 +0100
+++ squashfs4.2_fix/squashfs-tools/mksquashfs.c	2013-09-16 02:12:49.065084100 +0200
@@ -25,6 +25,11 @@
 #define FALSE 0
 #define TRUE 1
 
+#ifdef __CYGWIN__
+#include <sys/termios.h>
+#define FNM_EXTMATCH  (1 << 5)
+#endif
+
 #include <pwd.h>
 #include <grp.h>
 #include <time.h>
@@ -51,10 +56,12 @@
 #include <sys/wait.h>
 
 #ifndef linux
+#ifndef __CYGWIN__
 #define __BYTE_ORDER BYTE_ORDER
 #define __BIG_ENDIAN BIG_ENDIAN
 #define __LITTLE_ENDIAN LITTLE_ENDIAN
 #include <sys/sysctl.h>
+#endif /* __CYGWIN__ */
 #else
 #include <endian.h>
 #include <sys/sysinfo.h>
@@ -4062,6 +4069,10 @@
 
 	signal(SIGUSR1, sigusr1_handler);
 
+#ifdef __CYGWIN__
+	processors = atoi(getenv("NUMBER_OF_PROCESSORS"));
+#else
+
 	if(processors == -1) {
 #ifndef linux
 		int mib[2];
@@ -4083,6 +4094,7 @@
 		processors = sysconf(_SC_NPROCESSORS_ONLN);
 #endif
 	}
+#endif /* __CYGWIN__ */
 
 	thread = malloc((2 + processors * 2) * sizeof(pthread_t));
 	if(thread == NULL)
diff -u squashfs4.2/squashfs-tools/read_fs.c squashfs4.2_fix/squashfs-tools/read_fs.c
--- squashfs4.2/squashfs-tools/read_fs.c	2011-02-11 16:49:24.000000000 +0100
+++ squashfs4.2_fix/squashfs-tools/read_fs.c	2012-10-25 16:39:51.971062000 +0200
@@ -33,9 +33,11 @@
 #include <sys/mman.h>
 
 #ifndef linux
+#ifndef __CYGWIN__
 #define __BYTE_ORDER BYTE_ORDER
 #define __BIG_ENDIAN BIG_ENDIAN
 #define __LITTLE_ENDIAN LITTLE_ENDIAN
+#endif /* __CYGWIN__ */
 #else
 #include <endian.h>
 #endif
diff -u squashfs4.2/squashfs-tools/unsquashfs.c squashfs4.2_fix/squashfs-tools/unsquashfs.c
--- squashfs4.2/squashfs-tools/unsquashfs.c	2011-02-28 23:27:06.000000000 +0100
+++ squashfs4.2_fix/squashfs-tools/unsquashfs.c	2012-10-25 16:44:41.610628400 +0200
@@ -32,6 +32,11 @@
 #include <sys/sysinfo.h>
 #include <sys/types.h>
 
+#ifdef __CYGWIN__
+#include <sys/termios.h>
+#define FNM_EXTMATCH  (1 << 5)
+#endif
+
 struct cache *fragment_cache, *data_cache;
 struct queue *to_reader, *to_deflate, *to_writer, *from_writer;
 pthread_t *thread, *deflator_thread;
@@ -1809,6 +1814,10 @@
 		EXIT_UNSQUASH("Failed to set signal mask in intialise_threads"
 			"\n");
 
+#ifdef __CYGWIN__
+	    processors = atoi(getenv("NUMBER_OF_PROCESSORS"));
+#else /* __CYGWIN__ */
+
 	if(processors == -1) {
 #ifndef linux
 		int mib[2];
@@ -1830,6 +1839,7 @@
 		processors = sysconf(_SC_NPROCESSORS_ONLN);
 #endif
 	}
+#endif /* __CYGWIN__ */
 
 	thread = malloc((3 + processors) * sizeof(pthread_t));
 	if(thread == NULL)
diff -u squashfs4.2/squashfs-tools/unsquashfs.h squashfs4.2_fix/squashfs-tools/unsquashfs.h
--- squashfs4.2/squashfs-tools/unsquashfs.h	2011-02-11 16:49:24.000000000 +0100
+++ squashfs4.2_fix/squashfs-tools/unsquashfs.h	2012-10-25 16:41:40.678279700 +0200
@@ -46,9 +46,11 @@
 #include <sys/time.h>
 
 #ifndef linux
+#ifndef __CYGWIN__
 #define __BYTE_ORDER BYTE_ORDER
 #define __BIG_ENDIAN BIG_ENDIAN
 #define __LITTLE_ENDIAN LITTLE_ENDIAN
+#endif /* __CYGWIN__ */
 #else
 #include <endian.h>
 #endif