[glibc] ia64: Work around miscompilation and fix build on ia64's gcc-10 and later

[glibc] ia64: Work around miscompilation and fix build on ia64's gcc-10 and later

[Andreas K. Huttel]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=073edbdfabaad4786e974a451efe4b6b3f7a5a61

commit 073edbdfabaad4786e974a451efe4b6b3f7a5a61
Author: Sergei Trofimovich <slyich@gmail.com>
Date:   Sat Jul 11 20:06:51 2020 +0300

    ia64: Work around miscompilation and fix build on ia64's gcc-10 and later
    
    Needed since gcc-10 enabled -fno-common by default.
    
    [In use in Gentoo since gcc-10, no problems observed.
    Also discussed with and reviewed by Jessica Clarke from
    Debian. Andreas]
    
    Bug: https://bugs.gentoo.org/723268
    Reviewed-by: Carlos O'Donell <carlos@redhat.com>
    Signed-off-by: Sergei Trofimovich <slyich@gmail.com>
    Signed-off-by: Andreas K. Hüttel <dilfridge@gentoo.org>

Diff:
---
 sysdeps/unix/sysv/linux/ia64/dl-sysdep.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sysdeps/unix/sysv/linux/ia64/dl-sysdep.h b/sysdeps/unix/sysv/linux/ia64/dl-sysdep.h
index 3e4d5da820..5b3a5ad15f 100644
--- a/sysdeps/unix/sysv/linux/ia64/dl-sysdep.h
+++ b/sysdeps/unix/sysv/linux/ia64/dl-sysdep.h
@@ -32,7 +32,9 @@
 #ifndef __ASSEMBLER__
 /* Don't declare this as a function---we want it's entry-point, not
    it's function descriptor... */
-extern int _dl_sysinfo_break attribute_hidden;
+/* Use section ".text" to force far GPREL64 relocation instead of
+   GPREL22. */
+extern int _dl_sysinfo_break attribute_hidden __attribute__((section(".text")));
 # define DL_SYSINFO_DEFAULT ((uintptr_t) &_dl_sysinfo_break)
 # define DL_SYSINFO_IMPLEMENTATION		\
   asm (".text\n\t"				\