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DBI
/DBD
Interface If Perl reports that it can't find the `../mysql/mysql.so' module, then the problem is probably that Perl can't locate the shared library `libmysqlclient.so'.
You should be able to fix this by one of the following methods:
DBD::mysql
distribution with perl
Makefile.PL -static -config
rather than perl Makefile.PL
.
-L
options used to compile DBD::mysql
to reflect
the actual location of `libmysqlclient.so'.
LD_RUN_PATH
environment variable. Some systems use
LD_LIBRARY_PATH
instead.
Note that you may also need to modify the -L
options if there are
other libraries that the linker fails to find. For example, if the linker
cannot find libc
because it is in `/lib' and the link command
specifies -L/usr/lib
, change the -L
option to -L/lib
or add -L/lib
to the existing link command.
If you get the following errors from DBD::mysql
,
you are probably using gcc
(or using an old binary compiled with
gcc
):
/usr/bin/perl: can't resolve symbol '__moddi3' /usr/bin/perl: can't resolve symbol '__divdi3' |
Add -L/usr/lib/gcc-lib/... -lgcc
to the link command when the
`mysql.so' library gets built (check the output from make
for
`mysql.so' when you compile the Perl client). The -L
option
should specify the pathname of the directory where `libgcc.a' is located
on your system.
Another cause of this problem may be that Perl and MySQL aren't both
compiled with gcc
. In this case, you can solve the mismatch by
compiling both with gcc
.
You may see the following error from DBD::mysql
when you run the tests:
t/00base............install_driver(mysql) failed: Can't load '../blib/arch/auto/DBD/mysql/mysql.so' for module DBD::mysql: ../blib/arch/auto/DBD/mysql/mysql.so: undefined symbol: uncompress at /usr/lib/perl5/5.00503/i586-linux/DynaLoader.pm line 169. |
This means that you need to include the -lz
compression library on the
link line. That can be done by changing the following line in the file
`lib/DBD/mysql/Install.pm':
$sysliblist .= " -lm"; |
Change that line to:
$sysliblist .= " -lm -lz"; |
After this, you must run make realclean
and then
proceed with the installation from the beginning.
If you want to install DBI on SCO, you have to edit the `Makefile' in DBI-xxx and each subdirectory.
Note that the following assumes gcc
2.95.2 or newer:
OLD: NEW: CC = cc CC = gcc CCCDLFLAGS = -KPIC -W1,-Bexport CCCDLFLAGS = -fpic CCDLFLAGS = -wl,-Bexport CCDLFLAGS = LD = ld LD = gcc -G -fpic LDDLFLAGS = -G -L/usr/local/lib LDDLFLAGS = -L/usr/local/lib LDFLAGS = -belf -L/usr/local/lib LDFLAGS = -L/usr/local/lib LD = ld LD = gcc -G -fpic OPTIMISE = -Od OPTIMISE = -O1 OLD: CCCFLAGS = -belf -dy -w0 -U M_XENIX -DPERL_SCO5 -I/usr/local/include NEW: CCFLAGS = -U M_XENIX -DPERL_SCO5 -I/usr/local/include |
This is because the Perl dynaloader will not load the DBI
modules
if they were compiled with icc
or cc
.
If you want to use the Perl module on a system that doesn't support
dynamic linking (like SCO) you can generate a static version of
Perl that includes DBI
and DBD::mysql
. The way this works
is that you generate a version of Perl with the DBI
code linked
in and install it on top of your current Perl. Then you use that to
build a version of Perl that additionally has the DBD
code linked
in, and install that.
On SCO, you must have the following environment variables set:
shell> LD_LIBRARY_PATH=/lib:/usr/lib:/usr/local/lib:/usr/progressive/lib or: shell> LD_LIBRARY_PATH=/usr/lib:/lib:/usr/local/lib:/usr/ccs/lib:\ /usr/progressive/lib:/usr/skunk/lib shell> LIBPATH=/usr/lib:/lib:/usr/local/lib:/usr/ccs/lib:\ /usr/progressive/lib:/usr/skunk/lib shell> MANPATH=scohelp:/usr/man:/usr/local1/man:/usr/local/man:\ /usr/skunk/man: |
First, create a Perl that includes a statically linked DBI
module by
running these commands in the directory where your DBI
distribution is
located:
shell> perl Makefile.PL -static -config shell> make shell> make install shell> make perl |
Then you must install the new Perl. The output of make perl
will
indicate the exact make
command you will need to execute to perform
the installation. On SCO, this is
make -f Makefile.aperl inst_perl MAP_TARGET=perl
.
Next, use the just-created Perl to create another Perl that also includes a
statically linked DBD::mysql
by running these commands in the
directory where your DBD::mysql
distribution is located:
shell> perl Makefile.PL -static -config shell> make shell> make install shell> make perl |
Finally, you should install this new Perl. Again, the output of make
perl
indicates the command to use.
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