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Date: Thu, 03 Jun 2004 16:43:27 +0300
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Subject: MAC OS X and DSOs
From: andi@zend.com (Andi Gutmans)

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