Bug#790686: clang-3.5: no build-id enabled

[Jakub Wilk]

Package: clang-3.5
Version: 1:3.5.2-1

ELFs created by clang don't have build-id note sections:

$ touch empty.c
$ gcc -shared empty.c && readelf -n a.out | grep BUILD_ID -c
1
$ clang-3.5 -shared empty.c && readelf -n a.out | grep BUILD_ID -c
0


I guess this fragment of lib/Driver/ToolChains.cpp is at fault:

  if (Distro == DebianSqueeze || Distro == DebianWheezy ||
      Distro == DebianJessie || IsOpenSUSE(Distro) ||
      (IsRedhat(Distro) && Distro != RHEL4 && Distro != RHEL5) ||
      (IsUbuntu(Distro) && Distro >= UbuntuKarmic))
    ExtraOpts.push_back("--build-id");


-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'experimental')
Architecture: i386 (x86_64)
Foreign Architectures: amd64

Kernel: Linux 4.0.0-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages clang-3.5 depends on:
ii  binutils                 2.25-9
ii  libc6                    2.19-18
ii  libc6-dev                2.19-18
ii  libclang-common-3.5-dev  1:3.5.2-1
ii  libclang1-3.5            1:3.5.2-1
ii  libedit2                 3.1-20150325-1
ii  libffi6                  3.1-2+b2
ii  libgcc-4.9-dev           4.9.2-22
ii  libgcc1                  1:5.1.1-12
ii  libllvm3.5               1:3.5.2-1
ii  libobjc-4.9-dev          4.9.2-22
ii  libstdc++-4.9-dev        4.9.2-22
ii  libstdc++6               5.1.1-12
ii  libtinfo5                5.9+20150516-2
ii  zlib1g                   1:1.2.8.dfsg-2+b1

Versions of packages clang-3.5 recommends:
ii  llvm-3.5-dev  1:3.5.2-1
ii  python        2.7.9-1

-- 
Jakub Wilk