[PATCH v2 5/5] configure: Add -Wno-psabi

[Richard Henderson <richard.henderson@linaro.org>]

On aarch64, gcc 9.3 is generating

qemu/exec.c: In function ‘address_space_translate_iommu’:
qemu/exec.c:431:28: note: parameter passing for argument of type \
  ‘MemTxAttrs’ {aka ‘struct MemTxAttrs’} changed in GCC 9.1

and many other reptitions.  This structure, and the functions
amongst which it is passed, are not part of a QEMU public API.
Therefore we do not care how the compiler passes the argument,
so long as the compiler is self-consistent.

Cc: Alex Bennée <alex.bennee@linaro.org>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
TODO: The only portion of QEMU which does have a public api,
and so must have a stable abi, is "qemu/plugin.h".  We could
test this by forcing -Wpsabi or -Werror=psabi in tests/plugin.
I can't seem to make that work -- Alex?
---
 configure | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure b/configure
index 8b33447048..76d32e0f7b 100755
--- a/configure
+++ b/configure
@@ -2036,6 +2036,7 @@ add_to nowarn_flags -Wno-shift-negative-value
 add_to nowarn_flags -Wno-string-plus-int
 add_to nowarn_flags -Wno-typedef-redefinition
 add_to nowarn_flags -Wno-tautological-type-limit-compare
+add_to nowarn_flags -Wno-psabi
 
 gcc_flags="$warn_flags $nowarn_flags"
 
-- 
2.25.1