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[PATCH 0/6] Fix support for biarch compilers and cross cflags

From: Paolo Bonzini
Subject: [PATCH 0/6] Fix support for biarch compilers and cross cflags
Date: Tue, 21 Jun 2022 09:51:41 +0200

This series fixes two bugs with configure's cross compilation detection:

- first, --cross-cflags is not obeyed by pc-bios/ compilation

- second, on a ppc64le machine, the host compiler can be used for ppc64
  tests/tcg; however, this is not being done because $cpu does not
  match the target.  Likewise, on an x86_64 machine the host compiler
  can be used to build both i386 tests/tcg and pc-bios/optionrom, but
  the special casing done by the configure script only covers the latter.

The two are related because, if only the first was fixed, pc-bios/optionrom
would use either the i386 or the x86_64 cflags depending on which cross
compiler was found.  So patches 2-4 tackle not just the cross CFLAGS
problem with pc-bios, but also the biarch compiler problem with i386
and ppc.  Patch 5 then covers the other biarch compilers.

The other two patches are just cleanups.

Supersedes: <20220607094031.1227714-1-pbonzini@redhat.com>

Paolo Bonzini (6):
  pc-bios/optionrom: use -m16 unconditionally
  configure, pc-bios/optionrom: pass cross CFLAGS correctly
  configure, pc-bios/s390-ccw: pass cross CFLAGS correctly
  configure, pc-bios/vof: pass cross CFLAGS correctly
  configure: allow more host/target combos to use the host compiler
  configure: write EXTRA_CFLAGS for all sub-Makefiles

 configure                     | 50 ++++++++++++++++++-----------------
 pc-bios/optionrom/Makefile    | 15 +----------
 pc-bios/optionrom/code16gcc.h |  3 ---
 pc-bios/s390-ccw/Makefile     | 20 +++++++-------
 pc-bios/s390-ccw/netboot.mak  |  6 ++---
 pc-bios/vof/Makefile          |  8 +++---
 6 files changed, 43 insertions(+), 59 deletions(-)
 delete mode 100644 pc-bios/optionrom/code16gcc.h


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