[Bug build/29938] New: glibc-2.36 fails to build with Os with undefined reference to strcpy

["john.frankish at outlook dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29938

            Bug ID: 29938
           Summary: glibc-2.36 fails to build with Os with undefined
                    reference to strcpy
           Product: glibc
           Version: 2.36
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: john.frankish at outlook dot com
                CC: carlos at redhat dot com
  Target Milestone: ---

glibc-2.36 fails to build with Os, but builds without error with O2.

Built using:

echo "rootsbindir=/usr/sbin" > configparms

CC="gcc -mtune=generic -Os -pipe" ../configure --prefix=/usr --disable-werror
--enable-kernel=5.4.3 --enable-stack-protector=strong
--with-headers=/usr/include libc_cv_slibdir=/lib --enable-obsolete-rpc
--libexecdir=/usr/lib/glibc

find . -name config.make -type f -exec sed -i 's/-g -O2//g' {} \;
find . -name config.status -type f -exec sed -i 's/-g -O2//g' {} \;
find ../ -name Makeconfig -type f -exec sed -i 's/-g -O2//g' {} \;

make

/usr/lib/gcc/x86_64-tc-linux-gnu/12.2.0/../../../../x86_64-tc-linux-gnu/bin/ld:
/sources/glibc-2.36/build/elf/librtld.os: in function `_dl_start_profile':
(.text+0x9587): undefined reference to `strcpy'
/usr/lib/gcc/x86_64-tc-linux-gnu/12.2.0/../../../../x86_64-tc-linux-gnu/bin/ld:
/sources/glibc-2.36/build/elf/librtld.os: in function `_dl_load_cache_lookup':
(.text+0xe5fd): undefined reference to `strcpy'
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:1346: /sources/glibc-2.36/build/elf/ld.so] Error 1

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