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[Launchpad Bug Tracker <1361940@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package gcc-4.9 - 4.9.1-12ubuntu2

---------------
gcc-4.9 (4.9.1-12ubuntu2) utopic; urgency=medium

  * Update to SVN 20140903 (r214876) from the gcc-4_9-branch.
  * Enable cgo on AArch64 (Michael Hudson). LP: #1361940.
  * Update the Linaro support from the Linaro/4.9 branch.

gcc-4.9 (4.9.1-12) unstable; urgency=medium

  [ Samuel Thibault ]
  * boehm-gc: use anonymous mmap instead of brk also on hurd-*.
    Closes: #753791.

gcc-4.9 (4.9.1-11) unstable; urgency=medium

  * Update to SVN 20140830 (r214759) from the gcc-4_9-branch.
  * Update cross installation patches for the branch.
  * Use the base version (4.9) when accessing files in gcc_lib_dir.
 -- Matthias Klose <doko@xxxxxxxxxx>   Wed, 03 Sep 2014 16:21:46 +0200

** Changed in: gcc-4.9 (Ubuntu Utopic)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1361940

Title:
  patches for cgo on arm64

Status in “gcc-4.9” package in Ubuntu:
  Fix Released
Status in “gccgo-4.9” package in Ubuntu:
  Invalid
Status in “gcc-4.9” source package in Trusty:
  Invalid
Status in “gccgo-4.9” source package in Trusty:
  New
Status in “gcc-4.9” source package in Utopic:
  Fix Released
Status in “gccgo-4.9” source package in Utopic:
  Invalid

Bug description:
  Hi, I'm attaching three patches that together with
  https://bugs.launchpad.net/ubuntu/+source/gccgo-go/+bug/1361946 makes
  cgo work with gccgo on arm64.

  0001-compiler-symbol-names-should-have-.-replaced-with-_.patch -- this isn't actually arm64 specific at all, but a general gccgo/cgo problem
  0002-debug-elf-support-arm64-relocations.patch -- cgo parses dwarf data from .o files and can't do it without this
  0003-Enable-cgo-by-default-on-linux-arm64.patch -- this means that I don't have to remember to run export CGO_ENABLED=1 all the time

  Let me know if you need any more info.

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