Re: [Qemu-devel] [PATCH 0/4] disas: add libvixl to support A64 disassembly

[Stefan Weil <sw@weilnetz.de>]

Am 07.01.2014 17:51, schrieb Peter Maydell:
> Hi. This is a rebased and mildly cleaned up version of Claudio's
> RFC patchset from last year to add libvixl to QEMU and use it
> for A64 disassembly.
>
> NOTE NOTE NOTE
>  * we now link with g++, not gcc (even if the target doesn't
>    happen to need the A64 disassembler, since it's a bit hard
>    to tell whether there's a C++-source .o file in the link)
>  * I've tested Linux (including static link of linux-user) and
>    MacOS hosts, but not Windows
>  * if you have a visceral dislike of the idea of C++ in the
>    QEMU binary now would be a good time to say OMG WTF BBQ

For w32, C++ (currently only aarch64 executables) means loading
additional DLL files:

   text       data        bss        dec        hex    filename
  91453       1636       1012      94101      16f95   
/usr/lib/gcc/i686-w64-mingw32/4.6/libgcc_s_sjlj-1.dll
 796376      29784       3744     829904      ca9d0   
/usr/lib/gcc/i686-w64-mingw32/4.6/libstdc++-6.dll

They slightly increase the load time and the memory footprint (reducing
the meory which is available for QEMU system emulation), but I think
this can be neglected. The Windows installers will get larger of course,
too.

For Linux, QEMU will have new dependencies (libstdc++, maybe more) for
the aarch64 executables. CC'ing Aurelien therefore.

Regards
Stefan