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From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug bootstrap/98412] New: libcody does not compile with older GCC
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Date: Mon, 21 Dec 2020 12:22:28 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98412

            Bug ID: 98412
           Summary: libcody does not compile with older GCC versions
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: major
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ebotcazou at gcc dot gnu.org
  Target Milestone: ---

This fails in libcody:

g++ -std=3Dc++11 -g -O -fno-enforce-eh-specs -fno-stack-protector
-fno-threadsafe-statics -fno-exceptions -fno-rtti
-fdebug-prefix-map=3D/homes/botcazou/gcc-head/src/libcody/=3D -W -Wall -inc=
lude
config.h -I/homes/botcazou/gcc-head/src/libcody \
  -MMD -MP -MF buffer.d -c -o buffer.o
/homes/botcazou/gcc-head/src/libcody/buffer.cc
/homes/botcazou/gcc-head/src/libcody/buffer.cc: In member function 'void
Cody::Detail::MessageBuffer::AppendInteger(unsigned int)':
/homes/botcazou/gcc-head/src/libcody/buffer.cc:149:18: error: 'to_string' is
not a member of 'std'
   std::string v (std::to_string (u));
                  ^
gmake[3]: *** [buffer.o] Error 1

It's with GCC 4.9.4 so not very old (< 5 years).=