From: Paolo Bonzini <[email protected]>

Moving -mcx16 out of CPU_CFLAGS caused the detection of ATOMIC128 to
fail, because flags have to be specified by hand in cc.compiles and
cc.links invocations (why oh why??).

Ensure that these tests enable all the instruction set extensions that
will be used to build the emulators.

Fixes: c2bf2ccb266 ("configure: move -mcx16 flag out of CPU_CFLAGS", 2024-05-24)
Reported-by: Alex Bennée <[email protected]>
Reviewed-by: Michael Tokarev <[email protected]>
Reviewed-by: Alex Bennée <[email protected]>
Tested-by: Alex Bennée <[email protected]>
Cc: [email protected]
Signed-off-by: Paolo Bonzini <[email protected]>
(cherry picked from commit 8db4e0f92e83fd80b6609439440b303ddded7ad8)
Signed-off-by: Michael Tokarev <[email protected]>

diff --git a/meson.build b/meson.build
index 3031f37f45..a11018b3ad 100644
--- a/meson.build
+++ b/meson.build
@@ -2795,7 +2795,7 @@ config_host_data.set('CONFIG_ATOMIC64', cc.links('''
     __atomic_exchange_n(&x, y, __ATOMIC_RELAXED);
     __atomic_fetch_add(&x, y, __ATOMIC_RELAXED);
     return 0;
-  }'''))
+  }''', args: qemu_isa_flags))
 
 has_int128_type = cc.compiles('''
   __int128_t a;
@@ -2829,7 +2829,7 @@ if has_int128_type
       __atomic_compare_exchange_n(&p[4], &p[5], p[6], 0, __ATOMIC_RELAXED, 
__ATOMIC_RELAXED);
       return 0;
     }'''
-  has_atomic128 = cc.links(atomic_test_128)
+  has_atomic128 = cc.links(atomic_test_128, args: qemu_isa_flags)
 
   config_host_data.set('CONFIG_ATOMIC128', has_atomic128)
 
@@ -2838,7 +2838,8 @@ if has_int128_type
     # without optimization enabled.  Try again with optimizations locally
     # enabled for the function.  See
     #   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107389
-    has_atomic128_opt = cc.links('__attribute__((optimize("O1")))' + 
atomic_test_128)
+    has_atomic128_opt = cc.links('__attribute__((optimize("O1")))' + 
atomic_test_128,
+                                 args: qemu_isa_flags)
     config_host_data.set('CONFIG_ATOMIC128_OPT', has_atomic128_opt)
 
     if not has_atomic128_opt
@@ -2849,7 +2850,7 @@ if has_int128_type
           __sync_val_compare_and_swap_16(&x, y, x);
           return 0;
         }
-      '''))
+      ''', args: qemu_isa_flags))
     endif
   endif
 endif
-- 
2.39.5


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