Check each _PATH_* define individually (Solaris has paths.h but not a…

…ll of the

defines). From Eric N Vander Weele.

compat.h

@@ -61,12 +61,31 @@ void	warn(const char *, ...);
 void	warnx(const char *, ...);
 #endif
 
-#ifndef HAVE_PATHS_H
-#define	_PATH_BSHELL	"/bin/sh"
-#define	_PATH_TMP	"/tmp/"
+#ifdef HAVE_PATHS_H
+#include <paths.h>
+#endif
+
+#ifndef _PATH_BSHELL
+#define _PATH_BSHELL	"/bin/sh"
+#endif
+
+#ifndef _PATH_TMP
+#define _PATH_TMP	"/tmp/"
+#endif
+
+#ifndef _PATH_DEVNULL
 #define _PATH_DEVNULL	"/dev/null"
+#endif
+
+#ifndef _PATH_TTY
 #define _PATH_TTY	"/dev/tty"
+#endif
+
+#ifndef _PATH_DEV
 #define _PATH_DEV	"/dev/"
+#endif
+
+#ifndef _PATH_DEFPATH
 #define _PATH_DEFPATH	"/usr/bin:/bin"
 #endif
 
@@ -98,10 +117,6 @@ void	warnx(const char *, ...);
 #include "compat/bitstring.h"
 #endif
 
-#ifdef HAVE_PATHS_H
-#include <paths.h>
-#endif
-
 #ifdef HAVE_LIBUTIL_H
 #include <libutil.h>
 #endif