[Plplot-devel] gd driver and dlopen() flags

[<jc...@fe...>]

Hi,

In the current cvs I can't use the png driver:

[jcard@feup] ./x01c -dev png -o po.png -debug
Plplot library version: 5.1.0
plLoadDriver: Device not loaded!
plLoadDriver: tag=3Dpng, drvidx=3D4
plLoadDriver: Trying to load gdd_drv.so on ./drivers/gdd_drv.so
plLoadDriver: Trying to load at=20
/usr/local/lib/plplot5.1.0/data/../drivers/gdd_drv.so
Unable to load driver: gdd_drv.so.
Reason: /usr/local/lib/plplot5.1.0/data/../drivers/gdd_drv.so: cannot=20
open shared object file: No such file or directory
Segmentation fault

Notice that I'm runing from the build tmp directory, that=20
drivers/gdd_drv.so exists, there is no installed plplot, this also=20
happens with the single precision driver, it does not happens with any=20
other drivers, this happens in a freshly installed suse-8.0.

If I change in plcore.c, line 1855, RTLD_NOW to RTLD_LAZY, it works:

[jcard@feup] ./x01c -dev png -o po.png -debug
Plplot library version: 5.1.0
plLoadDriver: Device not loaded!
plLoadDriver: tag=3Dpng, drvidx=3D4
plLoadDriver: Trying to load gdd_drv.so on ./drivers/gdd_drv.so
Opened po.png
Segmentation fault

Oops... at home it worked (exactly same environement). Nevertheless, now=20
the driver is opened and the output file created and partly filled, so=20
there is some problem here.
Of course using LAZY instead of NOW would fix the problem (and I don't=20
understand why would anyone make it NOW instead of LATTER, if he can=20
:-)

Joao