glibc: bump SRCREV to latest 2.28

* drop one patch already applied in upstream

* this is still only partial fix for issues with -O0 and the bigger
  issue might be detected in runtime as described in:
  https://sourceware.org/glibc/wiki/FAQ#Why_do_I_get:.60.23error_.22glibc_cannot_be_compiled_without_optimization.22.27.2C_when_trying_to_compile_GNU_libc_with_GNU_CC.3F
  https://sourceware.org/bugzilla/show_bug.cgi?id=19444
  and tested in glibc build:
  https://sourceware.org/git/?p=glibc.git;a=blob;f=include/libc-symbols.h;h=8b9273c13a19f2658105c7997267d9086adae716;hb=HEAD#l74

* restore the anonymous python to trigger fatal error when -O0 is
  used (but don't restore the notes for -O, -O1, -Os

* git log --oneline 3c03baca37fdcb52c3881e653ca392bba7a99c2b..044c96f0d5595aeb0bb4e79355081c5a7f4faca5 | tee
044c96f0d5 Fix misreported errno on preadv2/pwritev2 (BZ#23579)
3a67c72c15 Fix stack overflow in tst-setcontext9 (bug 23717)
2339d6a55e i386: Use ENTRY and END in start.S [BZ #23606]
0ef2f4400c Fix strstr bug with huge needles (bug 23637)
a55e109709 Fix tst-setcontext9 for optimized small stacks.
307d04334d misc: New test misc/tst-gethostid
e7d22db29c Linux gethostid: Check for NULL value from gethostbyname_r [BZ #23679]
1fe2b9ca8a Fix segfault in maybe_script_execute.
0b79004569 regex: Add test tst-regcomp-truncated [BZ #23578]
58559f1443 regex: fix uninitialized memory access
aa8a3e4cde pthread_cond_broadcast: Fix waiters-after-spinning case [BZ #23538]
c87b5bab24 Improve ChangeLog message.
66fdfd57fe Regen RISC-V rvd ULPs
b0aa03dfff RISC-V: Fix rounding save/restore bug.
2f498f3d14 nss_files: Fix file stream leak in aliases lookup [BZ #23521]
bfcfa22589 nscd: Deallocate existing user names in file parser
d05b05d157 error, error_at_line: Add missing va_end calls
4b25485f03 Linux: Rewrite __old_getdents64 [BZ #23497]
726e1554ce hurd: Avoid PLTs for __pthread_get/setspecific
7f11842e74 hurd: Add missing symbols for proper libc_get/setspecific

* update 0031-sysdeps-ieee754-prevent-maybe-uninitialized-errors-w.patch
  based on review comments in upstream and extend it to cover PPC based
  on:
  http://lists.openembedded.org/pipermail/openembedded-core/2018-September/156258.html

* update 0032-sysdeps-ieee754-soft-fp-ignore-maybe-uninitialized-w.patch
  based on review comments in upstream

* add 0033-locale-prevent-maybe-uninitialized-errors-with-Os-BZ.patch
  with a fix for aarch64 build with -Os

* build tested with qemuarm, qemuarm64, qemux86, qemux86-64, qemuppc,
  qemumips, qemumips64 with -O, -O1, -Os.

(From OE-Core rev: f1f38df91975f9b53933c2d2fbdca291d1872d5f)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 100 insertions, 0 deletions

diff --git a/meta/recipes-core/glibc/glibc/0032-sysdeps-ieee754-soft-fp-ignore-maybe-uninitialized-w.patch b/meta/recipes-core/glibc/glibc/0032-sysdeps-ieee754-soft-fp-ignore-maybe-uninitialized-w.patch
new file mode 100644
index 0000000000..99cd2509ec
--- /dev/null
+++ b/meta/recipes-core/glibc/glibc/0032-sysdeps-ieee754-soft-fp-ignore-maybe-uninitialized-w.patch
@@ -0,0 +1,100 @@
+From 618668540e263c09b0eb28131dde7b4500158fd4 Mon Sep 17 00:00:00 2001
+From: Martin Jansa <Martin.Jansa@gmail.com>
+Date: Sun, 16 Sep 2018 12:39:22 +0000
+Subject: [PATCH] sysdeps/ieee754/soft-fp: ignore maybe-uninitialized with -O
+ [BZ #19444]
+
+* with -O, -O1, -Os it fails with:
+
+In file included from ../soft-fp/soft-fp.h:318,
+                 from ../sysdeps/ieee754/soft-fp/s_fdiv.c:28:
+../sysdeps/ieee754/soft-fp/s_fdiv.c: In function '__fdiv':
+../soft-fp/op-2.h:98:25: error: 'R_f1' may be used uninitialized in this function [-Werror=maybe-uninitialized]
+        X##_f0 = (X##_f1 << (_FP_W_TYPE_SIZE - (N)) | X##_f0 >> (N) \
+                         ^~
+../sysdeps/ieee754/soft-fp/s_fdiv.c:38:14: note: 'R_f1' was declared here
+   FP_DECL_D (R);
+              ^
+../soft-fp/op-2.h:37:36: note: in definition of macro '_FP_FRAC_DECL_2'
+   _FP_W_TYPE X##_f0 _FP_ZERO_INIT, X##_f1 _FP_ZERO_INIT
+                                    ^
+../soft-fp/double.h:95:24: note: in expansion of macro '_FP_DECL'
+ # define FP_DECL_D(X)  _FP_DECL (2, X)
+                        ^~~~~~~~
+../sysdeps/ieee754/soft-fp/s_fdiv.c:38:3: note: in expansion of macro 'FP_DECL_D'
+   FP_DECL_D (R);
+   ^~~~~~~~~
+../soft-fp/op-2.h:101:17: error: 'R_f0' may be used uninitialized in this function [-Werror=maybe-uninitialized]
+       : (X##_f0 << (_FP_W_TYPE_SIZE - (N))) != 0)); \
+                 ^~
+../sysdeps/ieee754/soft-fp/s_fdiv.c:38:14: note: 'R_f0' was declared here
+   FP_DECL_D (R);
+              ^
+../soft-fp/op-2.h:37:14: note: in definition of macro '_FP_FRAC_DECL_2'
+   _FP_W_TYPE X##_f0 _FP_ZERO_INIT, X##_f1 _FP_ZERO_INIT
+              ^
+../soft-fp/double.h:95:24: note: in expansion of macro '_FP_DECL'
+ # define FP_DECL_D(X)  _FP_DECL (2, X)
+                        ^~~~~~~~
+../sysdeps/ieee754/soft-fp/s_fdiv.c:38:3: note: in expansion of macro 'FP_DECL_D'
+   FP_DECL_D (R);
+   ^~~~~~~~~
+
+Build tested with Yocto for ARM, AARCH64, X86, X86_64, PPC, MIPS, MIPS64
+with -O, -O1, -Os.
+For AARCH64 it needs one more fix in locale for -Os.
+
+        Partial fix for [BZ #23716]
+        * sysdeps/ieee754/soft-fp/s_fdiv.c: Fix build with -O
+
+Work around the issue instead of removing -O like we do with
+SELECTED_OPTIMIZATION
+
+Upstream-Status: Submitted [https://www.sourceware.org/ml/libc-alpha/2018-09/msg00300.html]
+
+Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
+---
+ ChangeLog                        |  4 ++++
+ sysdeps/ieee754/soft-fp/s_fdiv.c | 12 ++++++++++++
+ 2 files changed, 16 insertions(+)
+
+diff --git a/ChangeLog b/ChangeLog
+index 922e916f2c..216336edc9 100644
+--- a/ChangeLog
++++ b/ChangeLog
+@@ -1,3 +1,7 @@
++2018-09-30  Martin Jansa  <Martin.Jansa@gmail.com>
++       Partial fix for [BZ #23716]
++       * sysdeps/ieee754/soft-fp/s_fdiv.c: Fix build with -O.
++
+ 2018-09-29  Martin Jansa  <Martin.Jansa@gmail.com>
+        Partial fix for [BZ #23716]
+        * sysdeps/ieee754/dbl-96/e_jnl.c: Fix build with -O
+diff --git a/sysdeps/ieee754/soft-fp/s_fdiv.c b/sysdeps/ieee754/soft-fp/s_fdiv.c
+index 341339f5ed..14655b77da 100644
+--- a/sysdeps/ieee754/soft-fp/s_fdiv.c
++++ b/sysdeps/ieee754/soft-fp/s_fdiv.c
+@@ -25,6 +25,16 @@
+ #undef fdivl
+ 
+ #include <math-narrow.h>
++
++#include <libc-diag.h>
++/* R_f[01] are not set in cases where it is not used in packing, but the
++   compiler does not see that it is set in all cases where it is
++   used, resulting in warnings that it may be used uninitialized.
++   The location of the warning differs in different versions of GCC,
++   it may be where R is defined using a macro or it may be where the
++   macro is defined.  */
++DIAG_PUSH_NEEDS_COMMENT;
++DIAG_IGNORE_NEEDS_COMMENT (8, "-Wmaybe-uninitialized");
+ #include <soft-fp.h>
+ #include <single.h>
+ #include <double.h>
+@@ -53,4 +63,6 @@ __fdiv (double x, double y)
+   CHECK_NARROW_DIV (ret, x, y);
+   return ret;
+ }
++DIAG_POP_NEEDS_COMMENT;
++
+ libm_alias_float_double (div)