[PATCH v2 00/15] let gdb reuse gcc's C compiler

[Tom Tromey]

This is version 2 of the patch to let gdb reuse gcc's C compiler.

Version 1 is here:

    https://sourceware.org/ml/gdb-patches/2014-05/msg00287.html

New in version 2:

* Updates to the gcc/gdb interface files according to gcc review
* gdb side of the PATH-searching code added; this lets libcc1
  choose the correct compiler to invoke
* One patch was checked in early, dropped from series
* Added a new gdbarch method for dealing with the configury triplet;
  this is patch #8 now
* Fixed object loading to follow recent changes to BFD

Built and regtested on x86-64 Fedora 20.