27 lines
1001 B
Diff
27 lines
1001 B
Diff
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diff --git a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h b/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
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index 7e5b0aecdcb4..5a4aad0698b8 100644
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--- a/sysdeps/unix/sysv/linux/bits/fcntl-linux.h
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+++ b/usr/include/arm-linux-gnueabihf/bits/fcntl-linux.h
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@@ -127,11 +127,17 @@
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This means that they are inherited across fork or clone with CLONE_FILES
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like BSD (flock) locks, and they are only released automatically when the
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last reference to the the file description against which they were acquired
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- is put. */
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+ is put.
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+
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+ Note that Linux does not support legacy (non-LFS) struct flock on 32-bit
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+ arches with OFD locks. On those arches you need define both _GNU_SOURCE
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+ and _FILE_OFFSET_BITS=64. */
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#ifdef __USE_GNU
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-# define F_OFD_GETLK 36
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-# define F_OFD_SETLK 37
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-# define F_OFD_SETLKW 38
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+# if __OFF_T_MATCHES_OFF64_T || defined __USE_FILE_OFFSET64
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+# define F_OFD_GETLK 36
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+# define F_OFD_SETLK 37
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+# define F_OFD_SETLKW 38
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+# endif
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#endif
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#ifdef __USE_LARGEFILE64
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