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From: "gcc@Denis-Excoffier.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/100246] [11/12 Regression] GCC will not bootstrap
 with clang 3.4/3.5 [xcode 5/6, Darwin 12/13]
Date: Tue, 27 Apr 2021 19:34:13 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100246

Denis Excoffier <gcc@Denis-Excoffier.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |gcc@Denis-Excoffier.org

--- Comment #2 from Denis Excoffier <gcc@Denis-Excoffier.org> ---
My linux (2.6.32-39-pve) fails bootstrapping recent GCC 11.1.0 using
gcc (Debian 4.9.2-10+deb8u2) 4.9.2, with the following errors:

In file included from
/tmp/lcl/tmp/gcc/gcc-11.1.0/gcc/config/i386/i386-options.c:94:0:
/tmp/lcl/tmp/gcc/gcc-11.1.0/gcc/config/i386/x86-tune-costs.h:32:56: error:
uninitialized const member 'stringop_algs::stringop_strategy::max'
   {rep_prefix_1_byte, {{-1, rep_prefix_1_byte, false}}}};
                                                        ^
/tmp/lcl/tmp/gcc/gcc-11.1.0/gcc/config/i386/x86-tune-costs.h:32:56: warning:
missing initializer for member 'stringop_algs::stringop_strategy::max'
[-Wmissing-field-initializers]
/tmp/lcl/tmp/gcc/gcc-11.1.0/gcc/config/i386/x86-tune-costs.h:32:56: error:
uninitialized const member 'stringop_algs::stringop_strategy::alg'
(...hundreds of similar messages...)

Applying this patch clears the issue.=