编译qemu-kvm，出现错误信息如下：
| CC block/qcow2-snapshot.o
In file included from ./qemu-common.h:6:0,
from block/qcow2-snapshot.c:25:
block/qcow2-snapshot.c: In function ‘qcow2_write_snapshots’:
./compiler.h:36:23: error: typedef ‘qemu_build_bug_on__250’ locally defined but not used [-Werror=unused-local-typedefs]
typedef char cat2(qemu_build_bug_on__,__LINE__)[(x)?-1:1];
^
./compiler.h:33:18: note: in definition of macro ‘cat’
#define cat(x,y) x ## y
^
./compiler.h:36:18: note: in expansion of macro ‘cat2’
typedef char cat2(qemu_build_bug_on__,__LINE__)[(x)?-1:1];
^
block/qcow2-snapshot.c:249:5: note: in expansion of macro ‘QEMU_BUILD_BUG_ON’
QEMU_BUILD_BUG_ON(offsetof(QCowHeader, snapshots_offset) !=
^
cc1: all warnings being treated as errors
all warnigs being treated as errors. |
all warnigs being treated as errors.
及所有的警告都视为错误。
解决办法：
在Makefile里最后一行下添加新的一行：
QEMU_CFLAGS+=-w
再次编译即可。
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