tree f73f84b399ea9ad53fe7ecb97ccf8e25ef815d03
parent 2616ad934e29dbc3e5995bfd25b3372014983423
author Paolo Bonzini <pbonzini@redhat.com> 1601017430 +0200
committer Paolo Bonzini <pbonzini@redhat.com> 1601018183 +0200

x86: Test if compiler supports -m16

-m16 option is available only since GCC 4.9.0 [1]. That causes a build
failure on centos-7 [2] that has GCC 4.8.5.

Fallback to -m32 if -m16 is not available.

1. http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59672
2. https://gitlab.com/bonzini/kvm-unit-tests/-/jobs/755368387

Fixes: 2616ad934e2 ("x86: realmode: Workaround clang issues")
Reported-by: Roman Bolshakov <r.bolshakov@yadro.com>
[Commit message by Roman Bolshakov, patch redone. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>