[dmd-internals] [D-Programming-Language/dmd] 24140a: use c++/cc as compiler defaults

[GitHub via dmd-internals]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/dmd
  Commit: 24140aedfb414661f056b799b816a471ce059859
      https://github.com/D-Programming-Language/dmd/commit/24140aedfb414661f056b799b816a471ce059859
  Author: Martin Nowak <code at dawg.eu>
  Date:   2016-01-03 (Sun, 03 Jan 2016)

  Changed paths:
    M src/link.d
    M src/posix.mak

  Log Message:
  -----------
  use c++/cc as compiler defaults

- supports more platforms out of the box, e.g. FBSD and OSX
- use CXX instead of CC for C++ compilers
- still supports old HOST_CC variable
- use HOST_CXX instead of CXX for impcnvgen and optabgen


  Commit: 8db0f99b8414aa6db285413ddd2fbef2a8ea3c8c
      https://github.com/D-Programming-Language/dmd/commit/8db0f99b8414aa6db285413ddd2fbef2a8ea3c8c
  Author: Martin Nowak <code at dawg.eu>
  Date:   2016-01-03 (Sun, 03 Jan 2016)

  Changed paths:
    M travis.sh

  Log Message:
  -----------
  workaround missing cc in gdc-4.9.3 test download

- b/c the picked up system-wide cc fails to link
  D programs against gdc-4.9.3's libstdc++


  Commit: ebe8a5acb1b61d9d66cca61c95982e7daef11083
      https://github.com/D-Programming-Language/dmd/commit/ebe8a5acb1b61d9d66cca61c95982e7daef11083
  Author: David Nadlinger <code at klickverbot.at>
  Date:   2016-01-07 (Thu, 07 Jan 2016)

  Changed paths:
    M src/link.d
    M src/posix.mak
    M travis.sh

  Log Message:
  -----------
  Merge pull request #4843 from MartinNowak/c++

use c++/cc as compiler defaults


Compare: https://github.com/D-Programming-Language/dmd/compare/aa676878b646...ebe8a5acb1b6