compat.h: include the compatible definition for PATH_MAX

This moves the definition of PATH_MAX, including completions where
PATH_MAX is undefined, to "compat.h" so that it does not have to be
defined in multiple places.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>

include/compat.h

@@ -136,6 +136,14 @@
 #endif	/* __BYTE_ORDER */
 
 
+#if HAVE_LIMITS_H
+#include <limits.h>  /* PATH_MAX */
+#endif  /* HAVE_LIMITS_H */
+
+#ifndef PATH_MAX
+#define PATH_MAX  8192
+#endif
+
 #if HAVE_SYS_SYSMACROS_H
 #include <sys/sysmacros.h>  /* major(), minor() */
 #else

lib/nilfs.c

@@ -69,7 +69,7 @@
 #include <errno.h>
 #include <assert.h>
 #include "nilfs.h"
-#include "compat.h"
+#include "compat.h"	/* PATH_MAX, etc */
 #include "util.h"
 #include "pathnames.h"
 #include "realpath.h"

lib/realpath.c

@@ -27,14 +27,6 @@
  * since the libc version has some security flaws.
  */
 
-#if HAVE_LIMITS_H
-#include <limits.h>		/* for PATH_MAX */
-#endif	/* HAVE_LIMITS_H */
-
-#ifndef PATH_MAX
-#define PATH_MAX 8192
-#endif
-
 #if HAVE_STDLIB_H
 #include <stdlib.h>		/* free() */
 #endif	/* HAVE_STDLIB_H */
@@ -48,6 +40,7 @@
 #endif	/* HAVE_STRINGS_H */
 
 #include <errno.h>
+#include "compat.h"	/* PATH_MAX */
 #include "realpath.h"
 
 #define MAX_READLINKS 32