Fix static data to link with -fno-common

-fno-common is the new default in GCC 10, replacing -fcommon in
GCC <= 9, so static data must only be allocated once.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Romain Dolbeau <[email protected]>
Closes #9943 

2 files changed, 3 insertions, 1 deletions

diff --git a/lib/libshare/smb.c b/lib/libshare/smb.c
index a95607ee0..f567f7c49 100644
--- a/lib/libshare/smb.c
+++ b/lib/libshare/smb.c
@@ -65,6 +65,8 @@ static boolean_t smb_available(void);
 
 static sa_fstype_t *smb_fstype;
 
+smb_share_t *smb_shares;
+
 /*
  * Retrieve the list of SMB shares.
  */
diff --git a/lib/libshare/smb.h b/lib/libshare/smb.h
index 7a0c0fd16..8ea44677f 100644
--- a/lib/libshare/smb.h
+++ b/lib/libshare/smb.h
@@ -44,6 +44,6 @@ typedef struct smb_share_s {
 	struct smb_share_s *next;
 } smb_share_t;
 
-smb_share_t *smb_shares;
+extern smb_share_t *smb_shares;
 
 void libshare_smb_init(void);