llvm dev - Jan 2011 - [LLVMdev] Question of executing AutoRegen.sh to regen configure file

Hello all,

I download the src of llvm 2.8 and run ./autoconf/AutoRegen.sh

However there is a little difference between origin configure file and the
generated one

$diff configure configure.bak

1394c1394
<   --enable-optimized      Compile with optimizations enabled (default is
YES)
---
>   --enable-optimized      Compile with optimizations enabled (default is
NO)

I am wondering to know whether I miss some parameter with executing
AutoRegen.sh??

thanks a lot

yi-hong
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On Dec 26, 2010, at 8:38 AM, Lu Mitnick wrote:
> Hello all,
> 
> I download the src of llvm 2.8 and run ./autoconf/AutoRegen.sh
> 
> However there is a little difference between origin configure file and the
generated one
> 
> $diff configure configure.bak
> 
> 1394c1394
> <   --enable-optimized      Compile with optimizations enabled (default
is YES)
> ---
> >   --enable-optimized      Compile with optimizations enabled (default
is NO)
> 
> I am wondering to know whether I miss some parameter with executing
AutoRegen.sh??
Probably not. The configure file for the release branch was probably edited
instead of configure.ac and so a regen will overwrite the last edit to that
file. This isn't going to be fixed on the release branch so if you do regen
configure it will probably have some differences (we'll make sure it
doesn't happen for 2.9). That said, if this is the only difference it looks
like just a comment difference and so shouldn't affect anything.

To be safe you'll probably want to explicitly set --enable-optimized or
--disable-optimized depending on what you want.

-eric

On Mon, Jan 3, 2011 at 11:01 AM, Eric Christopher <echristo at apple.com>
wrote:
> On Dec 26, 2010, at 8:38 AM, Lu Mitnick wrote:
>> $diff configure configure.bak
>>
>> 1394c1394
>> <   --enable-optimized      Compile with optimizations enabled
(default is YES)
>> ---
>> >   --enable-optimized      Compile with optimizations enabled
(default is NO)
>>
>> I am wondering to know whether I miss some parameter with executing
AutoRegen.sh??
>
> Probably not. The configure file for the release branch was probably edited
instead of configure.ac and so a regen will overwrite the last edit to that
file. This isn't going to be fixed on the release branch so if you do regen
configure it will probably have some differences (we'll make sure it
doesn't happen for 2.9). That said, if this is the only difference it looks
like just a comment difference and so shouldn't affect anything.
It looks more like the "configure --help" output than a comment.