Fix warnings that would be caused by ld flag --warn-common

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5240 c046a42c-6fe2-441c-8c8c-71466251a162

block.c

@@ -54,6 +54,8 @@ static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num,
 static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num,
                          const uint8_t *buf, int nb_sectors);
 
+BlockDriverState *bdrv_first;
+
 static BlockDriver *first_drv;
 
 int path_is_absolute(const char *path)

block_int.h

@@ -145,6 +145,6 @@ void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb,
                    void *opaque);
 void qemu_aio_release(void *p);
 
-BlockDriverState *bdrv_first;
+extern BlockDriverState *bdrv_first;
 
 #endif /* BLOCK_INT_H */

hw/arm-misc.h

@@ -37,7 +37,7 @@ void arm_load_kernel(CPUState *env, struct arm_boot_info *info);
 
 /* Multiplication factor to convert from system clock ticks to qemu timer
    ticks.  */
-int system_clock_scale;
+extern int system_clock_scale;
 qemu_irq *armv7m_nvic_init(CPUState *env);
 
 /* stellaris_enent.c */

hw/armv7m_nvic.c

@@ -50,6 +50,8 @@ typedef struct {
 #define SYSTICK_CLKSOURCE (1 << 2)
 #define SYSTICK_COUNTFLAG (1 << 16)
 
+int system_clock_scale;
+
 /* Conversion factor from qemu timer to SysTick frequencies.  */
 static inline int64_t systick_scale(nvic_state *s)
 {