Re: Safemalloc error in custom storage engine

Hi Tim,

On Wed, Aug 01, 2007 at 04:12:56PM -0500, Timothy P Clark wrote:
> Thanks for your help, Guilhem. My responses are near the bottom.
>
> Guilhem Bichot <guilhem@mysql.com> wrote on 08/01/2007 03:23:17 PM:

> > > base example code. In fact, I've narrowed it down to the following line
> in
> > > my Makefile:
> > > ha_myengine_la_LIBADD = ... -L$(top_builddir)/mysys/ -lmysys
> > >
> > > If I remove the linkage to the mysys library, all is well. However, I
> > > originally added this linkage for a reason. I was using my_malloc for
> > > memory allocations (as suggested in the MySQL Internals Coding
> Guidelines),
> > > and my .so refused to load because it couldn't resolve to _mymalloc.
> Seeing
> > > that _mymalloc was defined in libmysys.a, I figured that the best way
> to
> > > get around that problem was to link my storage engine to that library.

> CONF_COMMAND='../../source/mysql-5.1.19/configure
> '--prefix=/gsa/rchgsa/home/t/i/timclark/install/mysql-5.1.19'
> '--enable-thread-safe-client' '--enable-local-infile' '--with-debug=full'
> '--build=powerpc-ibm-aix5.3.0.0' '--host=powerpc-ibm-aix5.3.0.0'
> '--with-machine-type=power' '--with-named-z-libs=no' '--with-pic'
> '--with-client-ldflags=-static' '--with-mysqld-ldflags=-static'
> '--with-zlib-dir=bundled' '--with-big-tables' '--with-libedit'
> '--with-archive-storage-engine' '--with-blackhole-storage-engine'
> '--with-example-storage-engine' '--with-federated-storage-engine'
> '--with-csv-storage-engine' '--with-extra-charsets=complex'
> '--with-mysqld-ldflags=-Wl,-bE:mysqld.exp' 'CC=xlc_r -ma -qstrict
> -qmaxmem=8192 -qfullpath -qdbxextra -qldbl128 -qalign=natural' 'CPPFLAGS='
> 'CXXFLAGS=' 'CXX=xlC_r -ma -qstrict -qmaxmem=8192 -qfullpath -qdbxextra
> -qldbl128 -qalign=natural' 'LDFLAGS=-Wl,-brtl -Wl,-bexpall'
> 'build_alias=powerpc-ibm-aix5.3.0.0' 'host_alias=powerpc-ibm-aix5.3.0.0''

> That makes sense, but I'm sure that the same configure file produced
> Makefiles for both my storage engine and the rest of the mysql build. As
> well, all of the Makefiles have CFLAGS and CXXFLAGS that include
> -DSAFEMALLOC
Yes, looks like engine and libmysys and mysqld are consistently built. No clue for the moment :/
The fact that just adding libmysys to the link command without changing anything else in the code, provokes the problem, is beyond me. How about filing a bug report at bugs.mysql.com, mentioning how you build (the configure line above, your engine's Makefile.am), attaching your stripped down engine code (the one which is exactly like ha_example)?

-- 
   __  ___     ___ ____  __
  /  |/  /_ __/ __/ __ \/ /    Mr. Guilhem Bichot 
 / /|_/ / // /\ \/ /_/ / /__   MySQL AB, Lead Software Engineer
/_/  /_/\_, /___/\___\_\___/   Bordeaux, France
       <___/   www.mysql.com   

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