-fno-implicit-templates, -fno-exceptions,-fno-rtti problems
Can somebody tell me why these 3 flags must be added when I compile mysql from source code? I am trying to use another compiler instead gcc to compile mysql. But it doesnot accept these three flags. From the readme, it seems to me that these flags (especially -fno-exceptions must be used). I want to find a workaround for this issue, but first I need to know why these flags are needed. Can you explain me this? Can I eliminate these options and make mysql still runs well? thanks. Peng - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: -fno-implicit-templates, -fno-exceptions,-fno-rtti problems
Thanks for your reply. But You can find something from http://www.mysql.com/doc/I/B/IBM-AIX.html : If you are using gcc or egcs to compile MySQL, you must use the -fno-exceptions flag, as the exception handling in gcc/egcs is not thread safe! (This is tested with egcs 1.1.) And it also says the mysqld will crash radmonly without -fno-exceptions flag. I wonder recent gcc maybe can go on without the flags? I am using orcc to compile mysql. Can you tell me how gcc improve speed via avoiding exceptions? I mean if the source code contains throw-catch stuff, how gcc avoid that? And why throw-catch stuff is not performance friendly (just because the exception handling mechanism? but usually exceptions are very rare, there is no need to avoid exception, from this point of view)? thanks. Peng - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: -fno-implicit-templates, -fno-exceptions,-fno-rtti problems
somewhat that exceptions aren't thread-safe in egcs. Still, it would be worth trying out with gcc 2.95.x or gcc 3.x. I used 2.95.3 to compile mysql, it is fine, just because it accepts those flags. I didnot try to switch those flags off and compile. I am using orcc to compile mysql. Can you tell me how gcc improve speed via avoiding exceptions? I mean if the source code contains throw-catch stuff, how gcc avoid that? And why throw-catch stuff is not performance If the source code contains throw-catch, you are stuck. You _must_ turn on exception handling in order to use them. However, many people write code without any exceptions at all and in this case, the compiler can save some effort by not supporting them. Will this improve the performance? I mean just by not supporting them, no optimization to the code? You may want to try out Intel's C++ compiler for Linux if you are using an ix86 CPU. We used it here at work and it resulted in code that ran more than twice as fast, though we have never tried it with MySQL. I wonder whether Intel's C++ compiler accept those flags. Are those flags included in some standards? My problem is that I don't want the mysqld crashed randomly when I do benchmarking on it. And greetings to a fellow UofA student (though I've now graduated). thank you. I am honored. -- Regards Peng -- Peng Zhao [EMAIL PROTECTED] http://www.cs.ualberta.ca/~pengzhao TEL (Lab): (780)492-3725 Lab: CSC251 - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Msql-Mysql-modules-1.2219 bug?
SEND-PR: -*- send-pr -*- SEND-PR: Lines starting with `SEND-PR' will be removed automatically, as SEND-PR: will all comments (text enclosed in `' and `'). SEND-PR: From: pengzhao To: [EMAIL PROTECTED] Subject: Msql-Mysql-modules-1.2219 fails in the test, on Itanium machine Description: precise description of the problem (multiple lines) I downloaded Msql-Mysql-modules-1.2219 and try to install the DBD for mysql on my Itanium box. When I run make test, there are two tests fail. I don't know whether this is acceptable (or more specifically, if I run the sql-bench stuff, whether the test will crash or not). You can check the error at http://www.cs.ualberta.ca/~pengzhao/1 It is generated by /usr/bin/perl -I../blib/arch -I../blib/lib -I/usr/lib/perl5/5.6.0/ia64-linux -I/usr/lib/perl5/5.6.0 -e 'use Test::Harness qw(runtests $verbose); $verbose=1; runtests @ARGV;' t/*.t 1 Can anybody tell me can I go on with make install and forget about the errors during the test phase? Thanks. How-To-Repeat: code/input/activities to reproduce the problem (multiple lines) Fix: how to correct or work around the problem, if known (multiple lines) Submitter-Id: submitter ID Originator: Organization: Regards Peng -- Peng Zhao [EMAIL PROTECTED] http://www.cs.ualberta.ca/~pengzhao TEL (Lab): (780)492-3725 Lab: CSC251 MySQL support: [none | licence | email support | extended email support ] Synopsis: make test fails in Msql-Mysql-modules-1.2219 Severity: [ non-critical | serious | critical ] (one line) Priority: [ low | medium | high ] (one line) Category: mysql Class: [ sw-bug | doc-bug | change-request | support ] (one line) Release: mysql-3.23.47 (Source distribution) Environment: machine, os, target, libraries (multiple lines) System: Linux innisfail 2.4.17 #14 SMP Sat Jan 19 06:11:14 MST 2002 ia64 unknown Architecture: ia64 Some paths: /usr/bin/perl /usr/bin/make /usr/bin/gmake /usr/bin/gcc /usr/bin/cc GCC: Reading specs from /usr/lib/gcc-lib/ia64-redhat-linux/2.96/specs gcc version 2.96 2731 (Red Hat Linux 7.1 2.96-96) Compilation info: CC='gcc' CFLAGS='' CXX='g++' CXXFLAGS='' LDFLAGS='' LIBC: lrwxrwxrwx1 root root 13 Nov 10 20:20 /lib/libc.so.6.1 - libc-2.2.4.so -rwxr-xr-x1 root root 15500240 Aug 10 2001 /lib/libc-2.2.4.so -rw-r--r--1 root root 19629612 Aug 10 2001 /usr/lib/libc.a -rw-r--r--1 root root 180 Aug 10 2001 /usr/lib/libc.so Configure command: configure --prefix=/usr/scratch/pengzhao/mysql.gcc - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
