Rich Freeman on 10 Oct 2011 06:53:03 -0700

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Re: [PLUG] php module size, build vs rpm

On Mon, Oct 10, 2011 at 9:02 AM, sean finney <> wrote:
> On Sat, Oct 08, 2011 at 09:46:41PM -0400, Neill R wrote:
>> Specifically in /etc/httpd/modules (linked to
>> /usr/lib64/httpd/modules), when building from source using a configure
>> as show below, 26 MB.
>>  -rwxr-xr-x 1 root root 26731429 Oct  8 21:38
>> ./configure --prefix=/opt/build-php-5.3.8 --with-apxs2=/usr/sbin/apxs
>> --with-mysqli=mysqlnd --with-config-file-path=/etc/php
>> --with-config-file-scan-dir=/etc/php.d --enable-zip --with-bz2
>> --with-zlib --enable-mbstring --with-mcrypt --with-curl
>> When I look at another system where RPM's were installed from centos
>> testing, the same .so is: 3.4 MB
>> -rwxr-xr-x 1 root root 3.4M Nov 13  2009
> Without being involved in the headware-based distros, my guess is that
> the packages likely strip the binaries in question before stuffing them
> into the rpm files[1].  Is there a difference if you run file(1) on the
> so files in question?

Stripping is definitely a possibility here.  Another is compile
options - all those --with-xyz options add code, and if centos doesnt'
enable all of that it would impact their binary size.  Also, your
compiler options can make a difference.  If the one is built with -Os
and the other is built with -fdont-use-movesb-or-loop you could see a
size impact.  (Ok, that is a fake option, but things like -O3+ can be
pretty aggressive with unrolling loops.  In fact, I usually use -Os
since not swapping or having cache misses matters far more than
skipping 100 JNZs.)

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