Fix non-Linux build

[Samuel Thibault <samuel.thibault@xxxxxxxxxxxx>]

Hello,

Here are some fixes for non-linux build.

Samuel

diff --git a/configure.ac b/configure.ac
index 5f609dec7..061e22e15 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1906,7 +1906,8 @@ AS_IF([test "x$build_enosys" = xyes], [
 ])
 AM_CONDITIONAL([BUILD_ENOSYS], [test "x$build_enosys" = xyes])
 
-UL_BUILD_INIT([lsclocks], [yes])
+UL_BUILD_INIT([lsclocks], [check])
+UL_REQUIRES_LINUX([lsclocks])
 AM_CONDITIONAL([BUILD_LSCLOCKS], [test "x$build_lsclocks" = xyes])
 
 UL_BUILD_INIT([getopt], [yes])
diff --git a/libmount/src/hooks.c b/libmount/src/hooks.c
index dcfe69fa4..39d9d1337 100644
--- a/libmount/src/hooks.c
+++ b/libmount/src/hooks.c
@@ -315,9 +315,11 @@ static int call_hook(struct libmnt_context *cxt, struct hookset_hook *hook)
 {
 	int rc = 0;
 
+#if LINUX
 	if (mnt_context_is_fake(cxt))
 		DBG(CXT, ul_debugobj(cxt, " FAKE call"));
 	else
+#endif
 		rc = hook->func(cxt, hook->hookset, hook->data);
 
 	hook->executed = 1;