OpenSSL compile flags

[Ryan B. Lynch]

Whoops, sorry--my bad.  I'll repost it over there.

Iain Morgan wrote:

>Perhaps you meant to send this to one of the OpenSSL mailing lists _not_
>OpenSSH?
>
>On Tue Jan  3 08:19:27 2006, Ryan B. Lynch wrote:
>  
>
>>When building OpenSSL version 0.9.7i (and all prior versions that I've 
>>seen) on Linux, the compiler flags passed to 'gcc' include:
>>
>>    "-O3 -fomit-frame-pointer -mcpu=pentium"
>>
>>This occurs even when the output of `uname -m` and `arch` are "i486".  I 
>>have a few machines with hacked 'uname' and 'arch' commands that will 
>>report "i486" even when the real arch is "i686", for use in compiling 
>>binaries for other i486 systems.  Looking at the 'config' and 
>>'Configure' scripts, it appears that the arch value is guessed based on 
>>'uname', 'arch', and 'cat /proc/cpuinfo', in different cases.  I guess 
>>I'm running into a situation where the configure script is looking at 
>>"/proc/cpuinfo", which I can't do a quick-and-easy hack to give false data.
>>
>>Is there an option that I'm missing to pass a particular arch value to 
>>compile OpenSSL for?  Right now, I'm working around this by 'sed'ing the 
>>above-mentioned string out of the CCFLAGS variable in the Makefile and 
>>replacing it with "-O2 -march=i586 -pipe".  Is this not proper, or 
>>should it work OK?  (It seems to work fine, in running it, but there's a 
>>lot of things I wouldn't know about it.)
>>
>>Also, as a side-note, most of the literature I've seen regarding 'gcc' 
>>says that the "-mcpu=" flag is deprecated, and that "-march=" should be 
>>used instead.  Is there a reason why OpenSSL uses "-mcpu="?
>>
>>Thanks for the time and help, here--OpenSSL and OpenSSH are wonderful 
>>tools, and I appreciate all of the effort that goes into them.
>>
>>Thanks,
>>Ryan
>>
>>
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>>    
>>
>
>
>--
>Iain Morgan
>
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>  
>