** Also affects: snap-confine (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: snap-confine (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: snap-confine (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1623725

Title:
  Usage of secure_getenv prevents build against musl libc

Status in Snappy Launcher:
  Fix Released
Status in snap-confine package in Ubuntu:
  Fix Released
Status in snap-confine source package in Xenial:
  New

Bug description:
  [Impact]

  snap-confine relies on glibc function secure_getenv() to work. This
  function is not available on musl so the build cannot complete. With
  this bug fixed snap-confine now contains an implementation of
  secure_getenv() that is used when the standard library does not
  provide a copy of this function.

  [Test Case]

  snap-confine can be built with musl C library.

  [Regression Potential]

  This change does not affect the Ubuntu package.

  [Other Info]

  * This bug is a part of a major SRU that brings snap-confine in Ubuntu
  16.04 in line with the current upstream release 1.0.41.

  * snap-confine is technically an integral part of snapd which has an
  SRU exception and is allowed to introduce new features and take
  advantage of accelerated procedure. For more information see
  https://wiki.ubuntu.com/SnapdUpdates

  == # Pre-SRU bug description follows # ==

  Hi,

  Building snap-confine against the musl libc breaks due to the use of
  secure_getenv() which is a GNU extension.

  It would be nice to allow building snap-confine against musl as it's
  the default libc for OpenWRT and derived trees. This could be achieved
  by providing a secure_getenv alternate implementation or just falling
  back to getenv().

  See discussion at https://github.com/snapcore/snap-confine/pull/140

  Cheers,
  - Loïc Minier

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