+2012-05-05 Bruno Haible <bruno@clisp.org>
+
+ link-follow: Avoid guessing wrong when cross-compiling to glibc/Linux.
+ * m4/link-follow.m4 (gl_FUNC_LINK_FOLLOWS_SYMLINK): Require
+ AC_CANONICAL_HOST. When cross-compiling to a glibc/Linux platform,
+ set gl_cv_func_link_follows_symlink to "guessing no".
+
2012-05-05 Bruno Haible <bruno@clisp.org>
tzset: Avoid guessing wrong when cross-compiling to glibc systems.
-# serial 17
+# serial 18
dnl Run a program to determine whether link(2) follows symlinks.
dnl Set LINK_FOLLOWS_SYMLINKS accordingly.
dnl runtime test. If it is -2, use a generic runtime test.
AC_DEFUN([gl_FUNC_LINK_FOLLOWS_SYMLINK],
[dnl
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CHECK_FUNCS_ONCE([readlink])
dnl Mingw lacks link, although gnulib provides a good replacement.
dnl However, it also lacks symlink, so there's nothing to test in
]])],
[gl_cv_func_link_follows_symlink=no], dnl GNU behavior
[gl_cv_func_link_follows_symlink=yes], dnl Followed link/compile failed
- [gl_cv_func_link_follows_symlink=unknown] dnl We're cross compiling.
- )
+ [dnl We're cross compiling.
+ dnl The past results are "yes" on MacOS 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 $gl_cv_func_link_follows_symlink in
- yes) gl_link_follows_symlinks=1 ;;
- no) ;; # already defaulted to 0
+ case "$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