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我正在尝试编译一个包含 libboss 文件的程序，但是当我编译时出现以下错误。

In file included from test.c:1:
/opt/local/include/liboss/soundcard.h:342: error: static declaration of ‘ioctl’ follows non-static declaration
/usr/include/sys/ioctl.h:97: error: previous declaration of ‘ioctl’ was here
/opt/local/include/liboss/soundcard.h:353: error: static declaration of ‘open’ follows non-static declaration
/usr/include/sys/fcntl.h:464: error: previous declaration of ‘open’ was here
/opt/local/include/liboss/soundcard.h:363: error: static declaration of ‘close’ follows non-static declaration
/usr/include/unistd.h:476: error: previous declaration of ‘close’ was here
/opt/local/include/liboss/soundcard.h:366: error: conflicting types for ‘write’
/usr/include/unistd.h:535: error: previous declaration of ‘write’ was here

第一个错误发生的行就是这个。

@声卡.h

static inline int LIBOSS_IOCTL (int x, unsigned long y,...)
{
    int result;

    va_list l;
    va_start(l,y);
    result = liboss_ioctl(x,y,l);
    va_end (l);
    return result;
}

@ioctl.h

__BEGIN_DECLS
int ioctl(int, unsigned long, ...);
__END_DECLS

有什么方法可以让我对 soundcard.h 进行猴子补丁，这样就不会出现问题了？

谢谢！一个。

规格：Mac OSX 10.7.4，gcc i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1

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2 回答 2

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这听起来像是试图通过重新定义函数以在内核不支持的情况下提供 OSS操作来liboss在非本机系统上提供与 oss 兼容的声卡接口。如果是这种情况，您需要确保（或任何可能包含它的标头）不会包含在使用.ioctlioctlsys/ioctl.hsoundcard.h

于 2012-11-28T00:02:36.983 回答
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只需添加static、/usr/include/sys/ioctl.h:97和/usr/include/sys/fcntl.h:464（/usr/include/unistd.h:476并/usr/include/unistd.h:535在编译后再次撤消这些更改）。

在/opt/local/include/liboss/soundcard.h:366替换int为ssize_t.

# add static
sudo nano +97 /usr/include/sys/ioctl.h
- int  ioctl(int, unsigned long, ...);
+ static int  ioctl(int, unsigned long, ...);

# replace int by ssize_t
sudo nano +366 /opt/local/include/liboss/soundcard.h
- static inline int LIBOSS_WRITE (int x, const void *y, size_t l)
+ static inline ssize_t LIBOSS_WRITE (int x, const void *y, size_t l)
于 2014-10-31T15:51:04.817 回答