Patches squashfs4.2/squashfs-tools to compile cleanly under Cygwin. Based on this: http://comsul.blogspot.com/2008/12/squashfs-on-cygwin.html

squashfs4.2-cygwin.patch

diff -u original/squashfs4.2/squashfs-tools/mksquashfs.c patched/squashfs4.2/squashfs-tools/mksquashfs.c
--- original/squashfs4.2/squashfs-tools/mksquashfs.c	2011-02-28 14:24:09.000000000 -0800
+++ patched/squashfs4.2/squashfs-tools/mksquashfs.c	2011-04-18 19:42:17.042515000 -0700
@@ -51,10 +51,12 @@
 #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 +4064,9 @@
 
 	signal(SIGUSR1, sigusr1_handler);
 
+#ifdef __CYGWIN__
+	processors = atoi(getenv("NUMBER_OF_PROCESSORS"));
+#else
 	if(processors == -1) {
 #ifndef linux
 		int mib[2];
@@ -4083,6 +4088,7 @@
 		processors = sysconf(_SC_NPROCESSORS_ONLN);
 #endif
 	}
+#endif /* __CYGWIN__ */
 
 	thread = malloc((2 + processors * 2) * sizeof(pthread_t));
 	if(thread == NULL)
diff -u original/squashfs4.2/squashfs-tools/read_fs.c patched/squashfs4.2/squashfs-tools/read_fs.c
--- original/squashfs4.2/squashfs-tools/read_fs.c	2011-02-11 07:49:24.000000000 -0800
+++ patched/squashfs4.2/squashfs-tools/read_fs.c	2011-04-18 19:42:17.026897900 -0700
@@ -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 original/squashfs4.2/squashfs-tools/read_xattrs.c patched/squashfs4.2/squashfs-tools/read_xattrs.c
--- original/squashfs4.2/squashfs-tools/read_xattrs.c	2011-02-11 07:49:24.000000000 -0800
+++ patched/squashfs4.2/squashfs-tools/read_xattrs.c	2011-04-18 19:54:34.385093700 -0700
@@ -32,9 +32,11 @@
 #include <string.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 original/squashfs4.2/squashfs-tools/squashfs_fs.h patched/squashfs4.2/squashfs-tools/squashfs_fs.h
--- original/squashfs4.2/squashfs-tools/squashfs_fs.h	2011-02-11 07:49:24.000000000 -0800
+++ patched/squashfs4.2/squashfs-tools/squashfs_fs.h	2011-04-18 19:51:46.309356100 -0700
@@ -270,6 +270,10 @@
 typedef long long		squashfs_block;
 typedef long long		squashfs_inode;
 
+#ifdef __CYGWIN__
+#define FNM_EXTMATCH (1 << 5)
+#endif
+
 #define ZLIB_COMPRESSION	1
 #define LZMA_COMPRESSION	2
 #define LZO_COMPRESSION		3
diff -u original/squashfs4.2/squashfs-tools/unsquashfs.c patched/squashfs4.2/squashfs-tools/unsquashfs.c
--- original/squashfs4.2/squashfs-tools/unsquashfs.c	2011-02-28 14:27:06.000000000 -0800
+++ patched/squashfs4.2/squashfs-tools/unsquashfs.c	2011-04-18 20:23:11.790227800 -0700
@@ -456,14 +456,22 @@
 
 	user = getpwuid(inode->uid);
 	if(user == NULL) {
+#ifdef __CYGWIN__
+		sprintf(dummy, "%lu", inode->uid);
+#else
 		sprintf(dummy, "%d", inode->uid);
+#endif /* __CYGWIN__ */
 		userstr = dummy;
 	} else
 		userstr = user->pw_name;
 		 
 	group = getgrgid(inode->gid);
 	if(group == NULL) {
+#ifdef __CYGWIN__
+		sprintf(dummy2, "%lu", inode->gid);
+#else
 		sprintf(dummy2, "%d", inode->gid);
+#endif /* __CYGWIN__ */
 		groupstr = dummy2;
 	} else
 		groupstr = group->gr_name;
@@ -1809,6 +1817,9 @@
 		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 +1841,7 @@
 		processors = sysconf(_SC_NPROCESSORS_ONLN);
 #endif
 	}
+#endif /* __CYGWIN__ */
 
 	thread = malloc((3 + processors) * sizeof(pthread_t));
 	if(thread == NULL)
diff -u original/squashfs4.2/squashfs-tools/unsquashfs.h patched/squashfs4.2/squashfs-tools/unsquashfs.h
--- original/squashfs4.2/squashfs-tools/unsquashfs.h	2011-02-11 07:49:24.000000000 -0800
+++ patched/squashfs4.2/squashfs-tools/unsquashfs.h	2011-04-18 19:53:10.627116100 -0700
@@ -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