Add gcc_struct to all packed structures when compiling with mingw.

Just "packed" doesn't always pack the way we expect.

grub-core/disk/dmraid_nvidia.c

@@ -88,7 +88,7 @@ struct grub_nv_super
   char prodrev[NV_PRODREV_LEN];	/* 0x2C - 0x2F Array product revision */
   grub_uint32_t unit_flags;	/* 0x30 - 0x33 Flags for this disk */
   struct grub_nv_array array;	/* Array information */
-} __attribute__ ((packed));
+} GRUB_PACKED;
 
 static struct grub_diskfilter_vg *
 grub_dmraid_nv_detect (grub_disk_t disk,

grub-core/disk/geli.c

@@ -95,7 +95,7 @@ struct grub_geli_key
   grub_uint8_t iv_key[64];
   grub_uint8_t cipher_key[64];
   grub_uint8_t hmac[64];
-} __attribute__ ((packed));
+} GRUB_PACKED;
 
 struct grub_geli_phdr
 {
@@ -111,7 +111,7 @@ struct grub_geli_phdr
   grub_uint32_t niter;
   grub_uint8_t salt[64];
   struct grub_geli_key keys[2];
-} __attribute__ ((packed));
+} GRUB_PACKED;
 
 enum
   {
@@ -144,7 +144,7 @@ geli_rekey (struct grub_cryptodisk *dev, grub_uint64_t zoneno)
   const struct {
     char magic[4];
     grub_uint64_t zone;
-  } __attribute__ ((packed)) tohash
+  } GRUB_PACKED tohash
       = { {'e', 'k', 'e', 'y'}, grub_cpu_to_le64 (zoneno) };
   GRUB_PROPERLY_ALIGNED_ARRAY (key, GRUB_CRYPTO_MAX_MDLEN);
 

grub-core/disk/ldm.c

@@ -49,7 +49,7 @@ struct grub_ldm_vblk {
   grub_uint8_t type;
   grub_uint32_t unused2;
   grub_uint8_t dynamic[104];
-} __attribute__ ((packed));
+} GRUB_PACKED;
 #define LDM_VBLK_MAGIC "VBLK"
 
 enum
@@ -83,7 +83,7 @@ struct grub_ldm_label
   grub_uint64_t pv_size;
   grub_uint64_t config_start;
   grub_uint64_t config_size;
-} __attribute__ ((packed));
+} GRUB_PACKED;
 
 
 #define LDM_MAGIC "PRIVHEAD"

grub-core/disk/luks.c

@@ -56,7 +56,7 @@ struct grub_luks_phdr
     grub_uint32_t keyMaterialOffset;
     grub_uint32_t stripes;
   } keyblock[8];
-} __attribute__ ((packed));
+} GRUB_PACKED;
 
 typedef struct grub_luks_phdr *grub_luks_phdr_t;
 

grub-core/disk/mdraid1x_linux.c

@@ -97,7 +97,7 @@ struct grub_raid_super_1x
    */
   grub_uint16_t dev_roles[0];	/* Role in array, or 0xffff for a spare, or 0xfffe for faulty.  */
 };
-/* Could be __attribute__ ((packed)), but since all members in this struct
+/* Could be GRUB_PACKED, but since all members in this struct
    are already appropriately aligned, we can omit this and avoid suboptimal
    assembly in some cases.  */
 

grub-core/disk/mdraid_linux.c

@@ -175,7 +175,7 @@ struct grub_raid_super_09
    * Active descriptor
    */
   struct grub_raid_disk_09 this_disk;
-} __attribute__ ((packed));
+} GRUB_PACKED;
 
 static struct grub_diskfilter_vg *
 grub_mdraid_detect (grub_disk_t disk,

grub-core/disk/usbms.c

@@ -44,7 +44,7 @@ struct grub_usbms_cbw
   grub_uint8_t lun;
   grub_uint8_t length;
   grub_uint8_t cbwcb[16];
-} __attribute__ ((packed));
+} GRUB_PACKED;
 
 struct grub_usbms_csw
 {
@@ -52,7 +52,7 @@ struct grub_usbms_csw
   grub_uint32_t tag;
   grub_uint32_t residue;
   grub_uint8_t status;
-} __attribute__ ((packed));
+} GRUB_PACKED;
 
 struct grub_usbms_dev
 {