Re: [PORTS] RedHat6.0 & Alpha
От | Bruce Momjian |
---|---|
Тема | Re: [PORTS] RedHat6.0 & Alpha |
Дата | |
Msg-id | 199907151342.JAA08099@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: [PORTS] RedHat6.0 & Alpha (Uncle George <gatgul@voicenet.com>) |
Список | pgsql-ports |
> 1) The reason why for -mieee is that if u care for some of the 'rare' floating point > exceptions ( as defined by alpha floating point hardware ) then u want to handle > them - as per ieee specifications to give u the correct ieee result. When the > processor cant handle the exceptions it (can ) traps to software assist routines > ( hidden in the kernel ). But in order for the kernel to fix the exception u have to > stop the pipeline as close to the problem, so u can backtrace the user pc ( which is > by now quite a few instructions ahead of where the exception occured ) to the point > where it occured to see what register needs to have the correct value inserted. > Without the -mieee, the compiler will not arrange the float operations so that > it can be backstepped when a fault occures. The kernel then cannot fix the problem, > and forces a floating point exception onto the program. Death usually follows. > Therefor only do -mieee where u need to. ERGO can this flag be set individually > as per each individual makefile, and not as per ./configure ? Right now, it is hard to have makefile-specific flags. > 2) Then I want to report a bug - HAS_LONG_LONG in one of the 'c' files needs to be > turned on - I think there is only one - also for RH6.0/alpha. I dont think that > RH6.0/alpha has long long as a type and just uses long to define a 64bit quantity Add 'set -x' to configure, and figure how how the test is working in configure. Look at the configure output. It shows how it is setting those flags. > 3) Then can I presume that Absolutetime/Relativetime in nabstime.h will be changed > to int32? Added to TODO: * Make Absolutetime/Relativetime int4 because time_t can be int8 on some ports -- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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