Fix optional definitions in static binaries

* libcons/extra-version.c (cons_extra_version): Add weak attribute.
* libcons/vcons-add.c (cons_vcons_add): Likewise.
* libcons/vcons-remove.c (cons_vcons_remove): Likewise.
* libdiskfs/extra-version.c (diskfs_extra_version): Likewise.
* libdiskfs/get-source.c (diskfs_get_source): Likewise.
* libdiskfs/readonly-changed.c (diskfs_readonly_changed): Likewise.
* libdiskfs/sync-default.c (diskfs_default_sync_interval): Likewise.
* libdiskfs/validate-author.c (diskfs_validate_author_change): Likewise.
* libdiskfs/validate-flags.c (diskfs_validate_flags_change): Likewise.
* libdiskfs/validate-group.c (diskfs_validate_group_change): Likewise.
* libdiskfs/validate-mode.c (diskfs_validate_mode_change): Likewise.
* libdiskfs/validate-owner.c (diskfs_validate_owner_change): Likewise.
* libdiskfs/validate-rdev.c (diskfs_validate_rdev_change): Likewise.
* libnetfs/file-get-storage-info-default.c (netfs_file_get_storage_info):
Likewise.
* libnetfs/get-source.c (netfs_get_source): Likewise.
* libnetfs/set-get-trans.c (netfs_set_translator, netfs_get_translator):
Likewise.
* libtrivfs/get-source.c (trivfs_get_source): Likewise.

10 files changed, 10 insertions, 10 deletions

diff --git a/libdiskfs/extra-version.c b/libdiskfs/extra-version.c
index b1d78084..51920aa7 100644
--- a/libdiskfs/extra-version.c
+++ b/libdiskfs/extra-version.c
@@ -21,4 +21,4 @@
 
 #include "priv.h"
 
-char *diskfs_extra_version = "";
+char *diskfs_extra_version __attribute__ ((weak)) = "";
diff --git a/libdiskfs/get-source.c b/libdiskfs/get-source.c
index 43994464..2ef8ebcd 100644
--- a/libdiskfs/get-source.c
+++ b/libdiskfs/get-source.c
@@ -21,7 +21,7 @@
 
 #include "priv.h"
 
-error_t
+error_t __attribute__ ((weak))
 diskfs_get_source (struct protid *cred, char *source, size_t source_len)
 {
   if (diskfs_disk_name == NULL)
diff --git a/libdiskfs/readonly-changed.c b/libdiskfs/readonly-changed.c
index 44ee9225..7a1c03e8 100644
--- a/libdiskfs/readonly-changed.c
+++ b/libdiskfs/readonly-changed.c
@@ -24,7 +24,7 @@
    changed from read-only to read-write mode or vice-versa.  READONLY is the
    new state (which is also reflected in DISKFS_READONLY).  This function is
    also called during initial startup if the filesystem is to be writable.  */
-void
+void __attribute__ ((weak))
 diskfs_readonly_changed (int readonly)
 {
   /* By default do nothing at all.  */
diff --git a/libdiskfs/sync-default.c b/libdiskfs/sync-default.c
index 0d1fd93b..9646dd69 100644
--- a/libdiskfs/sync-default.c
+++ b/libdiskfs/sync-default.c
@@ -20,4 +20,4 @@
 
 #include "priv.h"
 
-int diskfs_default_sync_interval = DEFAULT_SYNC_INTERVAL;
+int diskfs_default_sync_interval __attribute__ ((weak)) = DEFAULT_SYNC_INTERVAL;
diff --git a/libdiskfs/validate-author.c b/libdiskfs/validate-author.c
index d7dacabd..cacfbfa4 100644
--- a/libdiskfs/validate-author.c
+++ b/libdiskfs/validate-author.c
@@ -20,7 +20,7 @@
 
 #include "priv.h"
 
-error_t
+error_t __attribute__ ((weak))
 diskfs_validate_author_change (struct node *np, uid_t author)
 {
   return 0;
diff --git a/libdiskfs/validate-flags.c b/libdiskfs/validate-flags.c
index bb54dadd..0673ad8a 100644
--- a/libdiskfs/validate-flags.c
+++ b/libdiskfs/validate-flags.c
@@ -20,7 +20,7 @@
 
 #include "priv.h"
 
-error_t
+error_t __attribute__ ((weak))
 diskfs_validate_flags_change (struct node *np, int flags)
 {
   return 0;
diff --git a/libdiskfs/validate-group.c b/libdiskfs/validate-group.c
index 556c5aaa..ef296ce1 100644
--- a/libdiskfs/validate-group.c
+++ b/libdiskfs/validate-group.c
@@ -20,7 +20,7 @@
 
 #include "priv.h"
 
-error_t
+error_t __attribute__ ((weak))
 diskfs_validate_group_change (struct node *np, gid_t group)
 {
   return 0;
diff --git a/libdiskfs/validate-mode.c b/libdiskfs/validate-mode.c
index 1cf150e6..bfcc9420 100644
--- a/libdiskfs/validate-mode.c
+++ b/libdiskfs/validate-mode.c
@@ -20,7 +20,7 @@
 
 #include "priv.h"
 
-error_t
+error_t __attribute__ ((weak))
 diskfs_validate_mode_change (struct node *np, mode_t mode)
 {
   return 0;
diff --git a/libdiskfs/validate-owner.c b/libdiskfs/validate-owner.c
index 0cbe296c..7bb30402 100644
--- a/libdiskfs/validate-owner.c
+++ b/libdiskfs/validate-owner.c
@@ -20,7 +20,7 @@
 
 #include "priv.h"
 
-error_t
+error_t __attribute__ ((weak))
 diskfs_validate_owner_change (struct node *np, uid_t uid)
 {
   return 0;
diff --git a/libdiskfs/validate-rdev.c b/libdiskfs/validate-rdev.c
index 2d766346..0d506676 100644
--- a/libdiskfs/validate-rdev.c
+++ b/libdiskfs/validate-rdev.c
@@ -20,7 +20,7 @@
 
 #include "priv.h"
 
-error_t
+error_t __attribute__ ((weak))
 diskfs_validate_rdev_change (struct node *np, dev_t rdev)
 {
   return 0;