The relevant code is in the client library and if I remember correctly is just used for asynchronous access functions. It won't affect your use of the server on Linux x86/x86_64.
The relevant code is written in assembler for amd64/i386 and for other arches it falls back to using ucontext.h functions specified by an old version of posix which were never implemented on OpenBSD. They were marked 'obsokescent' in newer posix due to a dependency on an obsolescent C language feature (see 'rationale' in http://pubs.opengroup.org/onlinepubs/009695399/functions/makecontext.html) so can't be used in strictly posix-conforming software. They aren't widely used (I've only seen it in mariadb and powerdns-recursor) and unlikely to be added to OpenBSD. (For some uses, boost's context library might be an alternative, though I'm unsure about arch support). Bogdan Andu <bo...@yahoo.com> wrote: > > >maybe the fact that mariadb packages built correctly made me blind >enough to forget about any other package that might depend on mysql >and not mariadb libraries, and curiously enough p5-DBD-mysql was one of >them, which I modified it to suport mariadb > > >i was excited to use mariadb on my OpenBSD machines. > >i'll clean'em up and i'll switch back to mysql-5.1 packages. > >i have a some remaining bits, though left in the dark namely, >concerning that cryptic message from cvs : > >"Revert back to using MySQL 5.1 for the time being. MariaDB 5.5 >introduces >a new libmysqlclient non-blocking API which utilizes co-routines. The >X86 >specific GCC ASM co-routine support hid the fact that there was an >issue. >The only fallback code so far is POSIX user contexts which OpenBSD does >not >support." > >Please if someone can shed more light upon this comment, because it >seems that it has impact on linux also >and based on this comment, which seems to me very important, I want to >know if it is safe to run mariadb server >on linux also, as I do currently on an Ubuntu 13.04 linux x86_64 . > >Thank you all , for your comments, > >Bogdan > > >________________________________ > From: Stuart Henderson <s...@spacehopper.org> >To: Bogdan Andu <bo...@yahoo.com>; Bogdan Andu <bo...@yahoo.com>; >"misc@openbsd.org" <misc@openbsd.org> >Sent: Monday, July 1, 2013 10:01 AM >Subject: Re: MariaDB and OpenBSD > > >You are trying to use a -current ports tree on 5.3 which is not >supported and you can have various problems as a result of this. > >Also mariadb is not currently enabled in the ports tree. It is setup to >use mysql not mariadb so you're going to have to modify the port for >anything you're installing which uses mysql. > > >Bogdan Andu <bo...@yahoo.com> wrote: > >>on that machine I have imported mariadb in >>/usr/ports/databases/mariadb, via cvs, which compiled ok. >> >>The problem was with p5-DBD-mysql needed by mariadb-server-5.5.31p0, >>which refuses to install without it, and for that reason I had to >>generate a p5-DBD-mysql for mariadb, using the Makefile rev. 1.36 for >>that package. >> >>I took the following steps: >>1. checkout mariadb from cvs repository into >> /usr/ports/databases/mariadb >>2. compiled and generated the packages mariadb-server-5.5.31p0 and >>mariadb-client-5.5.31p0; >>3. removed mysql* packages (client and server) because of conflicts >>4. when tried to install newlly generated mariadb-server-5.5.31p0 it >>required >> p5-DBD-mysql, but p5-DBD-mysql depends on mysql-* stuff; >>5. I removed p5-DBD-mysql; >>6. I update the Makefile with rev. 1.36 in >>/usr/ports/databases/p5-DBD-mysql/Makefile to make it mariadb >>compatible >>7. I did sudo make install for p5-DBD-mysql >>8. sudo pkg_add mariadb-server-5.5.31p0 >>9. sudo pkg_add mariadb-client-5.5.31p0 >> >> >>both client and server are working, but programmaticaly I encountered >>that error which seems to be solved, as Stefan Sperling suggested, via >>LD_PRELOAD env, var. >> >>what I am doing wrong? >> >> >> >>________________________________ >> From: Stuart Henderson <s...@spacehopper.org> >>To: misc@openbsd.org >>Sent: Saturday, June 29, 2013 1:19 AM >>Subject: Re: MariaDB and OpenBSD >> >> >>On 2013-06-28, Bogdan Andu <bo...@yahoo.com> wrote: >>> Hello, >>> >>> I have installed mariadb-server-5.5.31p0 and mariadb-client-5.5.31p0 >>> on an OpenBSD 5.3 amd64 machine. >> >>http://www.openbsd.org/faq/faq15.html#NoFun
