RFC: script to build many glibc configurations

[Joseph Myers]

I've attached an updated version of the script.  This one covers 
(hopefully) all GNU/Linux ABIs.  (Hurd and NaCl support would be a good 
idea, but that would need people familiar with those systems to advise on 
the right build process / equivalent of Linux kernel headers, and I'm not 
sure if Hurd is yet meant to build cleanly from unmodified glibc sources.)  
There is a --keep option to control keeping around build directories; as 
well as the default --keep=none, you can use --keep=failed to keep build 
directories from failed builds, or --keep=all to keep all build 
directories.  In any case, after glibc tests are run, if those got to the 
point of generating tests.sum then a following step will put the contents 
of tests.sum and the .out files for non-PASS tests into its own log so 
those remain available after the build directory is cleaned up.

With GCC 5 branch and binutils mainline I get the following failures in 
the compilers stage (and rather more in the glibc stage that I still need 
to investigate):

FAIL: compilers-ia64-linux-gnu gcc-first build

  System headers required for building libgcc, need to see if fixed in 
  newer GCC.

FAIL: compilers-m68k-linux-gnu-coldfire gcc-first build

  ICE building libgcc, need to see if fixed in newer GCC.

FAIL: compilers-sh3eb-linux-gnu glibc sh3eb-linux-gnu build
FAIL: compilers-sh4-linux-gnu-soft glibc sh4-linux-gnu-soft build
FAIL: compilers-sh4eb-linux-gnu-soft glibc sh4eb-linux-gnu-soft build
FAIL: compilers-sh4eb-linux-gnu glibc sh4eb-linux-gnu build

  SH4 soft-float: ucontext issues processing ucontext_i.sym.  Big-endian: 
  symptom (multiple definitions of various symbols) is the same as 
  resulted from missing __builtin_trap support, see 
  <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70216>, but the 
  -fno-isolate-erroneous-paths-* options don't seem sufficient to avoid it 
  for some reason.

FAIL: compilers-tilegx-linux-gnu gcc build
FAIL: compilers-tilegxbe-linux-gnu gcc build

  lib directory used for both 32-bit and 64-bit libraries (glibc install 
  inconsistent with GCC expectations).

-- 
Joseph S. Myers
joseph@codesourcery.com
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