/usr/include/x86_64-linux-gnu/gnu/stubs-32.h is in libc6-dev-i386 2.19-18+deb8u10.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | /* This file is automatically generated.
It defines a symbol `__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS. */
#ifdef _LIBC
# error Applications may not define the macro _LIBC
#endif
#define __stub_chflags
#define __stub_fattach
#define __stub_fchflags
#define __stub_fdetach
#define __stub_gtty
#define __stub_lchmod
#define __stub_revoke
#define __stub_setlogin
#define __stub_sigreturn
#define __stub_sstk
#define __stub_stty
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