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On Saturday 14 November 2009 17:28:26 Mike Frysinger wrote: > > > > Mike Frysinger wrote: > > > > >under Gentoo, a bunch of cache vars > > > > >are forced just for the headers step as there is no compiler to test. > > > > > those include mlong double tests. > > > > > libc_cv_mlong_double_128=yes > > > > > libc_cv_mlong_double_128ibm=yes > these are settings that should always be there and the user shouldnt be forced > to configure themselves. it also isnt specific to s390 ... it comes up with > ppc targets too. > for the headers step, it's safe to export these all the time for all targets. > we've been doing this in gentoo for quite a long time now. You mean unconditionally? On my x86_64 machine, debian lenny: - in 64-bit mode: sizeof( long double ) = 16 bytes = 128 bits - in 32-bit mode: sizeof( long double ) = 12 bytes = 96 bits So, does it really makes sense to _unconditionnally_ set long-double-128? The gcc man page says that on x86 (32-bit) the ABI specifies a size of 96 bits for long double. Also, what does long-double-128ibm means? Regards, Yann E. MORIN. -- .-----------------.--------------------.------------------.--------------------. | Yann E. MORIN | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: | | +33 662 376 056 | Software Designer | \ / CAMPAIGN | ___ | | +33 223 225 172 `------------.-------: X AGAINST | \e/ There is no | | http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL | v conspiracy. | `------------------------------^-------^------------------^--------------------' -- For unsubscribe information see http://sourceware.org/lists.html#faq
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