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Re: [Qemu-devel] [PATCH V2] build: remove compile warning

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH V2] build: remove compile warning
Date: Wed, 19 Jun 2013 11:33:05 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6

Il 19/06/2013 08:27, Wenchao Xia ha scritto:
>>> gcc is too stupid to understand the control flow.  The initialization
>>> shuts it up.
>> Looks like most people's GCC is not that stupid, or I would have broken
>> build for everyone, right?
> my gcc version:
> address@hidden ~]$ gcc -v
> Using built-in specs.
> Target: x86_64-redhat-linux
> Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
> --infodir=/usr/share/info
> --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-bootstrap
> --enable-shared --enable-threads=posix --enable-checking=release
> --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions
> --enable-gnu-unique-object
> --enable-languages=c,c++,objc,obj-c++,java,fortran,ada
> --enable-java-awt=gtk --disable-dssi
> --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-
> --enable-libgcj-multifile --enable-java-maintainer-mode
> --with-ecj-jar=/usr/share/java/eclipse-ecj.jar
> --disable-libjava-multilib --with-ppl --with-cloog --with-tune=generic
> --with-arch_32=i686 --build=x86_64-redhat-linux
> Thread model: posix
> gcc version 4.4.6 20120305 (Red Hat 4.4.6-4) (GCC)
>   By default configure, it seems qemu didn't set -Werror to break build.

It sets -Werror here:

gcc (GCC) 4.7.2 20121109 (Red Hat 4.7.2-8)

So configure is doing the right thing for both old and new-enough
compilers, I don't think there's a reason to change the code.


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