[PATCH] Fix compile failure on AArch64 Linux builds

[Alan Lawrence <alan.lawrence@arm.com>]

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Hi,

commit 5df384077f3633ec8cf2e08f9199e5a44994dbad (Merge pull request #129 from 
frida/fix/darwin-aarch64-cif-prep // Fix non-variadic CIF initialization for 
Apple/ARM64) breaks building libffi on aarch64 linux (e.g. 
aarch64-none-linux-gnu), with error:

../src/aarch64/ffi.c: In function 'ffi_prep_cif_machdep':
../src/aarch64/ffi.c:785:6: error: 'ffi_cif' has no member named 
'aarch64_nfixedargs'
    cif->aarch64_nfixedargs = 0;
       ^
make[3]: *** [src/aarch64/ffi.lo] Error 1

Attached patch is a simple fix, tested on aarch64-none-linux-gnu. Is this OK for 
trunk (and if so, can someone with write access please commit)?

Thanks, Alan



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diff --git a/src/aarch64/ffi.c b/src/aarch64/ffi.c
index 5369ea4..cdb7816 100644
--- a/src/aarch64/ffi.c
+++ b/src/aarch64/ffi.c
@@ -782,7 +782,9 @@ ffi_prep_cif_machdep (ffi_cif *cif)
           }
     }
 
+#if defined (__APPLE__)
   cif->aarch64_nfixedargs = 0;
+#endif
 
   return FFI_OK;
 }