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Re: [Qemu-trivial] [PATCH 1/2] Use libtool instead of ar to create stati


From: Christopher Friedt
Subject: Re: [Qemu-trivial] [PATCH 1/2] Use libtool instead of ar to create static libraries on Darwin.
Date: Mon, 2 May 2016 21:08:59 -0400

On Mon, May 2, 2016 at 9:04 PM, Fam Zheng <address@hidden> wrote:
> Cc'ing Peter Maydell, who must have better ideas than me on building on Mac.
>
> On Mon, 05/02 20:47, Christopher Friedt wrote:
>>
>> Currently, at least on Mac OS X 10.11.4 (El Capitan), Qemu fails to build 
>> for a few reasons.
>>
>> One of those reasons is that Apple's ld (at least ld64) does not properly 
>> process archive files created with ar (even Apple's ar).
>>
>> After some RTFM'ing, I came upon this tidbit, which is unfortunate. Luckily, 
>> autotools packages are not broken.
>>
>> "Libtool with -static is intended to replace ar(5) and ranlib."
>> http://www.manpages.info/macosx/libtool.1.html
>>
>> In any case, this change takes Apple's recommendations into account and 
>> allows Qemu to build on Mac OS X El Capitan.
>>
>> Signed-off-by: Christopher Friedt <address@hidden>
>> ---
>>  rules.mak | 4 ++++
>>  1 file changed, 4 insertions(+)
>>
>
>> diff --git a/rules.mak b/rules.mak
>> index d1ff311..44421af 100644
>> --- a/rules.mak
>> +++ b/rules.mak
>> @@ -105,7 +105,11 @@ modules:
>>       $(call LINK,$(filter %.o %.a %.mo, $^))
>>
>>  %.a:
>> +ifeq ($(shell uname),Darwin)
>
> I think you can use "ifdef CONFIG_DARWIN" here.

Good suggestion. I missed that entirely.

>> +     $(call quiet-command,rm -f $@ && libtool -static -o $@ $^,"  libtool   
>>  $(TARGET_DIR)$@")
>
> Is libtool always available on Mac OS X? If not, we may need to add the
> detection to ./configure.

Apple's libtool should be installed with their command line tools, at
least as far back as Snow Leopard.



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