Configure output when cross-compiling:
checking for working chown... no
This message comes from AC_FUNC_CHOWN in Autoconf. Here's a proposed patch
that touches Gnulib only. Should I submit a patch for Autoconf? Or is
Autoconf always preferring pessimistic guesses, regardless of platform?
2012-05-01 Bruno Haible <br...@clisp.org>
chown: Avoid "guessing no" when cross-compiling to glibc systems.
* m4/chown.m4 (gl_FUNC_CHOWN): When cross-compiling, set
ac_cv_func_chown_works without invoking AC_FUNC_CHOWN.
--- m4/chown.m4.orig Tue May 1 22:57:37 2012
+++ m4/chown.m4 Tue May 1 22:56:51 2012
@@ -1,4 +1,4 @@
-# serial 26
+# serial 27
# Determine whether we need the chown wrapper.
dnl Copyright (C) 1997-2001, 2003-2005, 2007, 2009-2012 Free Software
@@ -18,7 +18,6 @@
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([AC_TYPE_UID_T])
- AC_REQUIRE([AC_FUNC_CHOWN])
AC_REQUIRE([gl_FUNC_CHOWN_FOLLOWS_SYMLINK])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CHECK_FUNCS_ONCE([chown fchown])
@@ -33,11 +32,28 @@
fi
dnl Some old systems tried to use uid/gid -1 literally.
- if test $ac_cv_func_chown_works = no; then
- AC_DEFINE([CHOWN_FAILS_TO_HONOR_ID_OF_NEGATIVE_ONE], [1],
- [Define if chown is not POSIX compliant regarding IDs of -1.])
- REPLACE_CHOWN=1
+ if test $cross_compiling = no; then
+ AC_FUNC_CHOWN
+ else
+ dnl Improved cross-compilation guess.
+ case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) ac_cv_func_chown_works="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) ac_cv_func_chown_works="guessing no" ;;
+ esac
fi
+ case "$ac_cv_func_chown_works" in
+ *yes)
+ AC_DEFINE([HAVE_CHOWN], [1],
+ [Define to 1 if your system has a working 'chown' function.])
+ ;;
+ *)
+ AC_DEFINE([CHOWN_FAILS_TO_HONOR_ID_OF_NEGATIVE_ONE], [1],
+ [Define if chown is not POSIX compliant regarding IDs of -1.])
+ REPLACE_CHOWN=1
+ ;;
+ esac
dnl Solaris 9 ignores trailing slash.
dnl FreeBSD 7.2 mishandles trailing slash on symlinks.
