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, 68 insertions, 0 deletions

diff --git a/meta/recipes-core/glibc/glibc/0033-locale-prevent-maybe-uninitialized-errors-with-Os-BZ.patch b/meta/recipes-core/glibc/glibc/0033-locale-prevent-maybe-uninitialized-errors-with-Os-BZ.patch
new file mode 100644
index 0000000000..31058ca91a
--- /dev/null
+++ b/meta/recipes-core/glibc/glibc/0033-locale-prevent-maybe-uninitialized-errors-with-Os-BZ.patch
@@ -0,0 +1,68 @@
+From cbada1a1b218c1ef61d0eb4363fad7598e6509d6 Mon Sep 17 00:00:00 2001
+From: Martin Jansa <Martin.Jansa@gmail.com>
+Date: Sun, 30 Sep 2018 09:16:48 +0000
+Subject: [PATCH] locale: prevent maybe-uninitialized errors with -Os [BZ
+ #19444]
+
+Fixes following error when building for aarch64 with -Os:
+| In file included from strcoll_l.c:43:
+| strcoll_l.c: In function '__strcoll_l':
+| ../locale/weight.h:31:26: error: 'seq2.back_us' may be used uninitialized in this function [-Werror=maybe-uninitialized]
+|    int_fast32_t i = table[*(*cpp)++];
+|                           ^~~~~~~~~
+| strcoll_l.c:304:18: note: 'seq2.back_us' was declared here
+|    coll_seq seq1, seq2;
+|                   ^~~~
+| In file included from strcoll_l.c:43:
+| ../locale/weight.h:31:26: error: 'seq1.back_us' may be used uninitialized in this function [-Werror=maybe-uninitialized]
+|    int_fast32_t i = table[*(*cpp)++];
+|                           ^~~~~~~~~
+| strcoll_l.c:304:12: note: 'seq1.back_us' was declared here
+|    coll_seq seq1, seq2;
+|             ^~~~
+
+        Partial fix for [BZ #23716]
+        * locale/weight.h: Fix build with -Os.
+
+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/msg00539.html]
+
+Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
+---
+ ChangeLog       | 4 ++++
+ locale/weight.h | 7 +++++++
+ 2 files changed, 11 insertions(+)
+
+diff --git a/ChangeLog b/ChangeLog
+index 216336edc9..84fbbf47ed 100644
+--- a/ChangeLog
++++ b/ChangeLog
+@@ -1,3 +1,7 @@
++2018-09-30  Martin Jansa  <Martin.Jansa@gmail.com>
++       Partial fix for [BZ #23716]
++       * locale/weight.h: Fix build with -Os.
++
+ 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.
+diff --git a/locale/weight.h b/locale/weight.h
+index 6028d3595e..10bcea25e5 100644
+--- a/locale/weight.h
++++ b/locale/weight.h
+@@ -28,7 +28,14 @@ findidx (const int32_t *table,
+         const unsigned char *extra,
+         const unsigned char **cpp, size_t len)
+ {
++  /* With GCC 8 when compiling with -Os the compiler warns that
++     seq1.back_us and seq2.back_us might be used uninitialized.
++     This uninitialized use is impossible for the same reason
++     as described in comments in locale/weightwc.h.  */
++  DIAG_PUSH_NEEDS_COMMENT;
++  DIAG_IGNORE_Os_NEEDS_COMMENT (8, "-Wmaybe-uninitialized");
+   int_fast32_t i = table[*(*cpp)++];
++  DIAG_POP_NEEDS_COMMENT;
+   const unsigned char *cp;
+   const unsigned char *usrc;
+