glibc FTBFS with gcc-10 10.2.0-3ubuntu1

[Balint Reczey]

When testing the next upload merging changes from Debian I've encoundered the following failure:

https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/4017/+build/19642918/+files/buildlog_ubuntu-groovy-armhf.glibc_2.31-2ubuntu1~rbalint2_BUILDING.txt.gz :
...
arm-linux-gnueabihf-gcc-10 -mfloat-abi=soft -nostdlib -nostartfiles -r -o /<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/librtld.map.o -Wl,--defsym='__stack_chk_fail=0' -Wl,--defsym='__stack_chk_fail_local=0' \
        '-Wl,-(' /<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/dl-allobjs.os /<<PKGBUILDDIR>>/build-tree/armhf-armel/libc_pic.a -lgcc '-Wl,-)' -Wl,-Map,/<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/librtld.mapT
/usr/bin/ld: error: /usr/lib/gcc/arm-linux-gnueabihf/10/libgcc.a(_udivmoddi4.o) uses VFP register arguments, /<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/librtld.map.o does not
/usr/bin/ld: failed to merge target specific data of file /usr/lib/gcc/arm-linux-gnueabihf/10/libgcc.a(_udivmoddi4.o)
collect2: error: ld returned 1 exit status
make[3]: *** [Makefile:504: /<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/librtld.map] Error 1
...

The same command passed with gcc-9 in the Ubuntu archive:

...
arm-linux-gnueabihf-gcc-9 -mfloat-abi=soft -nostdlib -nostartfiles -r -o /<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/librtld.map.o -Wl,--defsym='__stack_chk_fail=0' -Wl,--defsym='__stack_chk_fail_local=0' \
 '-Wl,-(' /<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/dl-allobjs.os /<<PKGBUILDDIR>>/build-tree/armhf-armel/libc_pic.a -lgcc '-Wl,-)' -Wl,-Map,/<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/librtld.mapT
rm -f /<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/librtld.map.o
mv -f /<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/librtld.mapT /<<PKGBUILDDIR>>/build-tree/armhf-armel/elf/librtld.map
LC_ALL=C \
...

I think libgcc.a should not use VFP register arguments if we still want to allow using -mfloat-abi=soft this way, but I'm also checking a workaround in glibc to not build libc_pic.* so this error would not be hit. (libc-pic is not shipped in Debian anymore and the merge bring this change in to Ubuntu.)

[Matthias Klose (doko)]

b-d on g++-10-multilib is missing

[Launchpad Janitor (janitor)]

This bug was fixed in the package glibc - 2.32-0ubuntu3

---------------
glibc (2.32-0ubuntu3) groovy; urgency=medium

  * Fix cross-toolchain-base.
    Use ${Depends:foo=foo} magic to not create cross packages for
    libnss-nis*, rpcsvc-proto, libtirpc-dev and libnsl-dev (LP: #1895632)
  * XFAIL time/tst-cpuclock1 (LP: #1895687)

glibc (2.32-0ubuntu2) groovy; urgency=medium

  * Merge from Debian unstable
  * Refresh patches
  * debian/watch: Use HTTPS and download xz-compressed tarball
  * debian/watch: Use upstream's signing key to verify the tarball
  * Don't build and ship libnsl.a and Sun RPC static library and header files
  * XFAIL stdlib/tst-getrandom (LP: #1891403)
  * debian/symbols.wildcards: Update versions
  * Make libc-dev depend on rpcsvc-proto and libtirpc-dev.
    They replace development files for the Sun RPC library removed in glibc 32.
  * Make libc-dev depend on libnsl-dev.
    It replaces the development files for the new libnsl library replacing the
    one shipped by glibc.
  * Don't check symbols of libnss_nis.so and libnss_nisplus.so libraries.
    They are not shipped in glibc 2.32
  * Depend on libnss-nis and libnss-nisplus shipping the libraries dropped
    in 2.32
  * debian/patches/git-updates.diff: update from upstream stable branch:
    - x86-64: Fix FMA4 detection in ifunc
  * debian/testsuite-xfail-debian.mk: XFAIL unsupported tests failing in autopkgtest

glibc (2.31-3) unstable; urgency=medium

  [ Aurelien Jarno ]
  * debian/control.in/libc: add a Breaks: against openarena (<< 0.8.8+dfsg-4~)
    due to bug#966150.
  * debian/control.in/libc: add a Breaks: against ioquake3
    (<< 1.36+u20200211.f2c61c1~dfsg-2~) as previous versions are not correctly
    linked with libm.
  * debian/patches/git-updates.diff: update from upstream stable branch:
    - Fix an infinite loop in the iconv program (CVE-2016-10228). Closes:
      #856503.
    - debian/patches/any/submitted-selinux-deprecations.diff: upstreamed.
    - debian/patches/x32/submitted-fix-nptl-setgroups-x32.diff: upstreamed.
  * debian/rules.d/build.mk: install <finclude/math-vector-fortran.h> in the
    multiarch path. Closes: #962457.

  [ Samuel Thibault ]
  * debian/libc0.3.symbols.hurd-i386: Fix dependency of __errno_location and
    __h_errno_location symbols in libpthread.
  * patches/hurd-i386/unsubmitted-sbrk-_end.diff: Fix _end symbol appearance
    by reworking sbrk.
  * patches/hurd-i386/unsubmitted-sched_sets.diff: Add sched_set/getscheduler.
  * patches/hurd-i386/git-pthread_atfork-hidden.diff: Hide pthread_atfork
    symbols imported to applications, to avoid leaking them.

glibc (2.31-2ubuntu1) groovy; urgency=medium

  [ Michael Hudson-Doyle ]
  * Mark tst-getpw as XFAIL on arm64. (LP: #1869364)

  [ Balint Reczey ]
  * Merge from Debian unstable
    - debian/patches/any/submitted-selinux-deprecations.diff: proposed patch to
      ignore the selinux deprecations introduced in libselinux (>= 3.1), fixing
      an FTBFS. (LP: #1887919)
    Remaining changes:
    - Enable libc6{,-dev}-armel on armhf and libc6{-dev}-armhf on armel.
    - Heavily mangle the way we do service restarting on major upgrades.
    - Build amd64 with -O3, and b...