[MacPorts] #24778: please add mcpu (march is only for x86)

[MacPorts]

#24778: please add mcpu (march is only for x86)
------------------------------------------+---------------------------------
 Reporter:  randomshinichi4869@…          |       Owner:  macports-tickets@…                   
     Type:  enhancement                   |      Status:  new                                  
 Priority:  Normal                        |   Milestone:  MacPorts 1.9.0                       
Component:  base                          |     Version:  1.8.2                                
 Keywords:  gcc, optimization             |        Port:                                       
------------------------------------------+---------------------------------
 Hello,
 I saw that there was a ticket here before that proposed adding mcpu, but
 the author couldn't really say what was the difference between mcpu and
 march, so let me state why mcpu is needed:
 On any architecture other than x86/x86-64 (and it seems ARM too), march,
 which means to generate code that will run only on the CPU specified, will
 not work. For the same function, you need mcpu, march=G5 will not work.
 mcpu on x86/x86-64 is basically mtune, which means generate code that is
 not architecture specific.
 Basically:[[BR]]

 x86/x86-64  PowerPC[[BR]]
 march=mcpu[[BR]]
 mcpu=mtune[[BR]]

 I also propose that a general purpose dumping ground for compiler flags
 and linker flags a la Gentoo's /etc/make.conf CFLAGS and LDFLAGS be
 implemented, so that I don't have to file a ticket every time I find that
 macports.conf doesn't let you specify a certain compiler flag.

-- 
Ticket URL: <http://trac.macports.org/ticket/24778>
MacPorts <http://www.macports.org/>
Ports system for Mac OS