Bug#819185: clang: please enable -fdebug-prefix-map support

[Daniel Kahn Gillmor]

Package: clang
Version: 1:3.7-34~exp1
Severity: wishlist
Tags: upstream patch
User: reproducible-builds at lists.alioth.debian.org
Usertags: buildpath
Control: forwarded -1 https://llvm.org/bugs/show_bug.cgi?id=24619

clang currently doesn't support -fdebug-prefix-map, but it's useful
when trying to make reproducible builds.

upstream has added this feature in svn (r250094):

 https://llvm.org/bugs/show_bug.cgi?id=24619

but it doesn't appear to be in debian yet.

Maybe it's in 3.8.0 ?  It would be great to have it available in
debian at any rate so that we can make builds reproducible independent
of where they're built.

The upstream patch is attached.

    --dkg

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'testing'), (200, 'unstable'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.4.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages clang depends on:
ii  clang-3.7  1:3.7.1-2

clang recommends no packages.

clang suggests no packages.

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