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MAC OS X and DSOs

php.internals

Andi Gutmans

22 years ago

Hi guys,

There seem to be some problems with loading shared libraries on the MAC OS
X platform. It seems that ./configure on MAC OS X defines HAVE_LIBDL in
php_config.h which causes the following code in zend.h not to be used:
#elif defined(HAVE_MACH_O_DYLD_H)
# define DL_LOAD(libname)           zend_mh_bundle_load(libname)
# define DL_UNLOAD(handle)          zend_mh_bundle_unload(handle)
# define DL_FETCH_SYMBOL(h,s)       zend_mh_bundle_symbol(h,s)
# define DL_ERROR                   zend_mh_bundle_error
# define DL_HANDLE                  void *
# define ZEND_EXTENSIONS_SUPPORT    1

After testing this stuff quite a bit it seems that in order for DSO's to
work correctly on MAC OS X they should be defined. I am thinking of
changing the following code in zend.h:

#if defined(HAVE_LIBDL)

to

#if defined(HAVE_LIBDL) && !defined(HAVE_MACH_O_DYLD_H)

Anyone have additional insight on this?
Andi

Dan Kalowsky

22 years ago

This behavior is mostly likely a result of the changes to the included
system libraries in 10.3.  The truth to the matter is now dlcompat is
distributed with OS X (as of 10.3) so most of the library handling code
Marko and I wrote probably is no longer necessary for future
generations of OS X (please note this is untested).  It is necessary
though for those running 10.2 (and earlier), and there do seem to be a
great many of them still.

Looking at your change though, I don't believe it should cause much
damage.

On Jun 3, 2004, at 9:43 AM, Andi Gutmans wrote: