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Fix Hurd glibc build with GCC 8.

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The build of glibc for Hurd has been failing with GCC mainline because
of the checks that aliases have the same type as the symbol aliased;
the Hurd dl-sysdep.c has a macro that defines aliases without using
the proper type.  When GCC 8 branches (soon), I intend to make it the
default version in build-many-glibcs.py, so these failures would mean
the default build-many-glibcs.py build fails for Hurd again.

This patch fixes the Hurd build with GCC 8 by changing the macro that
defines the problem aliases to use the correct type for them.  An
include of <not-errno.h> is needed to avoid this use of typeof
resulting in an error for __access_noerrno not being declared.

Tested compilation for i686-gnu with build-many-glibcs.py.

	* sysdeps/mach/hurd/dl-sysdep.c: Include <not-errno.h>.
	(check_no_hidden): Use type of original function when declaring
	alias.
This commit is contained in:
Joseph Myers 2018-04-24 16:33:47 +00:00
parent e5aea5c314
commit 5e14bb9793
2 changed files with 8 additions and 2 deletions
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4
ChangeLog
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@ -1,5 +1,9 @@
2018-04-24 Joseph Myers <joseph@codesourcery.com>
* sysdeps/mach/hurd/dl-sysdep.c: Include <not-errno.h>.
(check_no_hidden): Use type of original function when declaring
alias.
* sysdeps/unix/sysv/linux/sys/ptrace.h
(PTRACE_SECCOMP_GET_METADATA): New enum value and macro.
* sysdeps/unix/sysv/linux/bits/ptrace-shared.h

6
sysdeps/mach/hurd/dl-sysdep.c
View File

@ -46,6 +46,7 @@
#include <dl-procinfo.h>
#include <dl-tunables.h>
#include <not-errno.h>
extern void __mach_init (void);
@ -278,8 +279,9 @@ _dl_sysdep_start_cleanup (void)
/* This macro checks that the function does not get renamed to be hidden: we do
need these to be overridable by libc's. */
#define check_no_hidden(name) \
static void __check_##name##_no_hidden(void) __attribute__((alias(#name)));
#define check_no_hidden(name) \
static __typeof (name) __check_##name##_no_hidden \
__attribute__ ((alias (#name)));
/* Open FILE_NAME and return a Hurd I/O for it in *PORT, or return an
error. If STAT is non-zero, stat the file into that stat buffer. */