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Use libc_hidden_* for __cmsg_nxthdr (bug 15105).

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Among other localplt test failures when building with -Os, there are
libc.so PLT references for __cmsg_nxthdr.  This is a simple case of a
function that is inlined for -O2 but not for -Os; this patch adds
libc_hidden_proto / libc_hidden_def for it to avoid a localplt failure
even when it is not inlined.

Tested for x86_64 (both that it removes this particular localplt
failure for -Os - but other such failures remain so the bug can't yet
be closed - and that the testsuite continues to pass without -Os).

	[BZ #15105]
	* include/sys/socket.h [!_ISOMAC] (__cmsg_nxthdr): Use
	libc_hidden_proto.
	* sysdeps/unix/sysv/linux/cmsg_nxthdr.c (__cmsg_nxthdr): Use
	libc_hidden_def.
This commit is contained in:
Joseph Myers 2018-02-15 20:59:12 +00:00
parent 499b315324
commit e4452a2d19
3 changed files with 9 additions and 0 deletions
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6
ChangeLog
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@ -1,5 +1,11 @@
2018-02-15 Joseph Myers <joseph@codesourcery.com>
[BZ #15105]
* include/sys/socket.h [!_ISOMAC] (__cmsg_nxthdr): Use
libc_hidden_proto.
* sysdeps/unix/sysv/linux/cmsg_nxthdr.c (__cmsg_nxthdr): Use
libc_hidden_def.
[BZ #15105]
* include/stdio.h [!_ISOMAC && IS_IN (libc)] (fputs): Use
libc_hidden_proto.

2
include/sys/socket.h
View File

@ -154,5 +154,7 @@ libc_hidden_proto (__libc_sa_len)
# define SA_LEN(_x) __libc_sa_len((_x)->sa_family)
#endif
libc_hidden_proto (__cmsg_nxthdr)
#endif
#endif

1
sysdeps/unix/sysv/linux/cmsg_nxthdr.c
View File

@ -37,3 +37,4 @@ __cmsg_nxthdr (struct msghdr *mhdr, struct cmsghdr *cmsg)
return NULL;
return cmsg;
}
libc_hidden_def (__cmsg_nxthdr)