On Fri, 2002-03-08 at 10:02, Ireneusz Piasecki wrote:
> Hi,
>
> It is very interesting, what are you wwriting, but:
>
>
> " To determine if you should be concerned about this compiler issue,
execute
> gcc -v from the command prompt on your system. If the compiler reports
> version 2.96, then there is a problem (this is the case, for example
on RH
> 7.x series or Mandrake 8.x). In this case, you should not try to
compile
> your own binary before downgrading to one of the compilers mentioned
above.
> You should also NOT use the MySQL server provided with your
distribution --
> as this copy of MySQL was compiled with the same ill-advised compiler
> version. "
> this is from http://www.mysql.com/downloads/mysql-3.23.html
> I understud, don't compile mysql with 2.96 of gcc.
> I'm confiused.
>
> The query is: Compile server mysql with 2.96 or not ?
Ireneusz,
Our (MySQL AB) recommendation is to NOT compile *mysql* with RedHat's
2.96 compiler. Instead, in the case of RedHat, you should use 2.91
EGCS or 2.95 GCC compilers.
If you do choose to compile with 2.96RH, then you are most likely
going to run into problems in a production system.
We definitely have a difference of opinion with Trond here.
The bottom line is that if you want a stable MySQL server, then you
should compile with GCC 2.91 or 2.95. These are the compilers for
which our extensive testing has shown MySQL to be stable with.
In any large and complicated project there are going to be
dependencies on the compiler that the software was written for. Please
note that the reason (atleast one of the reasons) RedHat includes 2.91
EGCS in their distribution is to compile the Linux kernel correctly.
The Linux kernel -- another large and complicated project -- requires
2.91 EGCS. Read the kernel documentation for more information (README
file included in every stock kernel tarball).
This is absolutely normal and acceptable for large, complex
softwares. Software simply cannot be changed everytime a software
vendor (RH in this case) decides to fork their own version of
something as fundamental as a compiler.
MySQL in particular is a software product that gives your system a
real work-out. We have discovered many critical bugs in the libc's,
kernels and compilers of various systems -- for instance Glibc, the
Linux kernel, and RedHat's forked 2.96 compiler.
You will find the same is true of projects like ReiserFS (who do not
recommend 2.96 either).
While RedHat's 2.96 compiler may indeed work fine for relatively
lightweight software that is most likely not going to be used in a
high-performance production environment. We (MySQL AB) have determined
-- through many investigations of MySQL under high-load compiled with
2.96RH -- that this compiler is not good for MySQL.
Now that GCC 3.x has been released, we will be looking at making MySQL
4.x series (and higher) work well with it. GCC 3.x is looking very
promising.
Regards,
Matt
--
For technical support contracts, visit https://order.mysql.com/
__ ___ ___ ____ __
/ |/ /_ __/ __/ __ \/ / Mr. Matt Wagner <[EMAIL PROTECTED]>
/ /|_/ / // /\ \/ /_/ / /__ MySQL AB, Coordinator of Development
/_/ /_/\_, /___/\___\_\___/ Hopkins, Minnesota USA
<___/ www.mysql.com
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