- ((Stat_buf_1).st_ino == (Stat_buf_2).st_ino \
- && (Stat_buf_1).st_dev == (Stat_buf_2).st_dev)
-
- int
- main ()
- {
- const char *file = "conftest.file";
- const char *sym = "conftest.sym";
- const char *hard = "conftest.hard";
- struct stat sb_file, sb_hard;
-
- /* Create a symlink to the regular file. */
- if (symlink (file, sym))
- abort ();
-
- /* Create a hard link to that symlink. */
- if (link (sym, hard))
- abort ();
-
- if (lstat (hard, &sb_hard))
- abort ();
- if (lstat (file, &sb_file))
- abort ();
-
- /* If the dev/inode of hard and file are the same, then
- the link call followed the symlink. */
- return SAME_INODE (sb_hard, sb_file) ? 0 : 1;
- }
- ],
- jm_ac_cv_func_link_follows_symlink=yes,
- jm_ac_cv_func_link_follows_symlink=no,
- jm_ac_cv_func_link_follows_symlink=yes, We're cross compiling.
- )
- ])
- if test $jm_ac_cv_func_link_follows_symlink = yes; then
- AC_DEFINE(LINK_FOLLOWS_SYMLINKS, 1,
- [Define if link(2) dereferences symbolic links.])
+ ((Stat_buf_1).st_ino == (Stat_buf_2).st_ino \
+ && (Stat_buf_1).st_dev == (Stat_buf_2).st_dev)
+
+ int
+ main ()
+ {
+ const char *file = "conftest.file";
+ const char *sym = "conftest.sym";
+ const char *hard = "conftest.hard";
+ struct stat sb_file, sb_hard;
+
+ /* Create a symlink to the regular file. */
+ if (symlink (file, sym))
+ return 2;
+
+ /* Create a hard link to that symlink. */
+ if (link (sym, hard))
+ return 3;
+
+ if (lstat (hard, &sb_hard))
+ return 4;
+ if (lstat (file, &sb_file))
+ return 5;
+
+ /* If the dev/inode of hard and file are the same, then
+ the link call followed the symlink. */
+ return SAME_INODE (sb_hard, sb_file) ? 1 : 0;
+ }
+ ]])],
+ [gl_cv_func_link_follows_symlink=no], dnl GNU behavior
+ [gl_cv_func_link_follows_symlink=yes], dnl Followed link/compile failed
+ [dnl We're cross compiling.
+ dnl The past results are "yes" on Mac OS X, FreeBSD, NetBSD,
+ dnl OpenBSD, Minix, AIX, HP-UX, OSF/1, and "no" on Linux, Cygwin.
+ case "$host_os" in
+ # On glibc/Linux we know the result.
+ linux*-gnu*) gl_cv_func_link_follows_symlink="guessing no" ;;
+ # Otherwise, we don't know.
+ *) gl_cv_func_link_follows_symlink=unknown ;;
+ esac
+ ])
+ rm -f conftest.file conftest.sym conftest.hard
+ ])
+ case "$gl_cv_func_link_follows_symlink" in
+ *yes) gl_link_follows_symlinks=1 ;;
+ *no) ;; # already defaulted to 0
+ *) gl_link_follows_symlinks=-2 ;;
+ esac
+ fi