2010/9/16 Ralf Corsepius <rc040203(a)freenet.de>:
On 09/16/2010 03:49 PM, Sergio Belkin wrote:
> 2010/9/15 Ralf Corsepius<rc040203(a)freenet.de>:
>> On 09/15/2010 05:02 PM, Sergio Belkin wrote:
>>>
>>> Hi,
>>>
>>> Does Makefile flags from the tarball overrides %{optflags} ?
>>
>> This question can't be answered.
>>
>> %{optflags} and Makefiles actually are entirely unrelated.
>>
>> How to communicate %{optflags} to Makefiles can vary largely between
>> rpm.specs and is part of the job package maintainers are supposed to take
>> care of.
>>
>> Ralf
>>
>
> Well I am really newbie packaging,
Everybody is a newbie, somewhere ;)
> As rpm command:
> rpm --eval "%{optflags}"
> -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
> -fstack-protector --param=ssp-buffer-size=4 -m32 -march=i686
> -mtune=atom -fasynchronous-unwind-tables
>
> but Makefile contains:
>
> CXXFLAGS=-ansi -Wall -Wno-deprecated
>
> So, what of these flags are commited?
To be able to help, you'd have to provide further details about the
package you are trying to package, because there are several way to
communicate %{optflags} to a package's build-system.
E.g.
* Plain simple Makefile:
Override the make-variable to receive %optflags from the environment at
make-time:
make CFLAGS="%{optflags}"
* Modern autotools:
Pass optflags as args at configure-time:
.../configure CFLAGS="%{optflags}"
* Old autotools:
Pass from the environment:
CFLAGS="%{optflags}" .../configure
* Poorly written Makefiles which don't allow overriding from the
environment:
Textual substitution before runming make:
sed -i -e "s,^CFLAGS.*,CFLAGS = %{optflags}," Makefile
make ....
etc. etc.
Also note that the name of the make-variable to take %optflags may vary.
In most cases it's CFLAGS, in c++-projects it's often CXXFLAGS.
Ralf
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Thanks!
The package is a development library in C++. It has a plain Makefile.
I verified and in fact make overrides Makefile flags if they are
explicit, I've tested using:
make lib CXXFLAGS="%{optflags}"
in spec file.
I could see that by the ouput. As a matter of fact, I'd want to use
Makefile flags because optflags use things like "-mtune" ... for
exampel I'm building on a netbook and I don't like that it makes atom
optimizations... doesn't it make sense, does it?
TIA
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