[Bug 1300211] Re: Can't install both gcc-multilib and gcc-arm-linux-gnueabihf

[Jan Hudec]

But _why_ does gcc-multilib create that link?

gcc-multilib is a meta-package. None of the components that actually do
anything depend on it. If I remove it and keep just the versioned
packages (gcc-5-multilib, g++-5-multilib – or just the appropriate :i386
libraries), gcc/g++ still compile with both -m32 and -m64 just fine and
cross-compilers can be installed too and pass a smoke-test.

So this is an obvious workaround. gcc-multilib is not needed for
anything, gcc-5-multilib (and g++/gobj/gobj++-5-multilib) will pull in
everything that is needed for -m32 and -m64. The only downside is that
now the switch to -6- will have to be made manually when it hits
appropriate release.

But why, then, does the link exist in the first place?

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https://bugs.launchpad.net/bugs/1300211

Title:
  Can't install both gcc-multilib and gcc-arm-linux-gnueabihf

Status in gcc-defaults package in Ubuntu:
  Invalid

Bug description:
  Problem is on Ubuntu 14.04.  Earlier versions of Ubuntu don't seem to
  have this issue and the two packages can happily coexist.

  When I run e.g.,
  apt-get install gcc-multilib, it uninstalls the ARM compilers.

  root at rufus-linux:/# apt-get install gcc-multilib 
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following packages were automatically installed and are no longer required:
    binutils-arm-linux-gnueabihf cpp-4.8-arm-linux-gnueabihf cpp-arm-linux-gnueabihf gcc-4.8-arm-linux-gnueabihf-base
    libasan0-armhf-cross libatomic1-armhf-cross libc6-armel-armhf-cross libc6-armhf-cross libc6-dev-armel-armhf-cross
    libc6-dev-armhf-cross libgcc-4.8-dev-armhf-cross libgcc1-armhf-cross libgomp1-armhf-cross libsfasan0-armhf-cross
    libsfatomic1-armhf-cross libsfgcc-4.8-dev-armhf-cross libsfgcc1-armhf-cross libsfgomp1-armhf-cross
    libsfstdc++-4.8-dev-armhf-cross libsfstdc++6-armhf-cross libstdc++-4.8-dev-armhf-cross libstdc++6-armhf-cross
    linux-libc-dev-armhf-cross
  Use 'apt-get autoremove' to remove them.
  The following packages will be REMOVED
    g++-4.8-arm-linux-gnueabihf g++-4.8-multilib-arm-linux-gnueabihf g++-arm-linux-gnueabihf
    gcc-4.8-arm-linux-gnueabihf gcc-4.8-multilib-arm-linux-gnueabihf gcc-arm-linux-gnueabihf
  The following NEW packages will be installed
    gcc-multilib
  0 to upgrade, 1 to newly install, 6 to remove and 0 not to upgrade.
  Need to get 0 B/1,024 B of archives.
  After this operation, 31.3 MB disk space will be freed.

  Similarly, when I install the arm compiler, it uninstalls gcc-multilib
  root at rufus-linux:/# apt-get install gcc-arm-linux-gnueabihf
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  The following packages were automatically installed and are no longer required:
    libsfstdc++-4.8-dev-armhf-cross libsfstdc++6-armhf-cross libstdc++-4.8-dev-armhf-cross libstdc++6-armhf-cross
  Use 'apt-get autoremove' to remove them.
  The following extra packages will be installed:
    gcc-4.8-arm-linux-gnueabihf gcc-4.8-multilib-arm-linux-gnueabihf
  Suggested packages:
    gcc-4.8-doc gcc-4.8-locales libgcc1-dbg-armhf-cross libgomp1-dbg-armhf-cross libitm1-dbg-armhf-cross
    libatomic1-dbg-armhf-cross libasan0-dbg-armhf-cross libtsan0-dbg-armhf-cross libbacktrace1-dbg-armhf-cross
    libquadmath-dbg-armhf-cross manpages-dev automake1.9 gdb-arm-linux-gnueabihf gcc-doc
  The following packages will be REMOVED
    gcc-multilib
  The following NEW packages will be installed
    gcc-4.8-arm-linux-gnueabihf gcc-4.8-multilib-arm-linux-gnueabihf gcc-arm-linux-gnueabihf
  0 to upgrade, 3 to newly install, 1 to remove and 0 not to upgrade.
  Need to get 0 B/5,074 kB of archives.
  After this operation, 15.7 MB of additional disk space will be used.

  Note, this is a test ubuntu disk image created using pbuilder.

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