Hi,
during linking apache (1.3.12 static) I received an 'undefined symbol DL_UNLOAD' error from libphp.a
on an IRIX 6.5.9 Platform using gcc.

Problem: missing '#if ZEND_EXTENSIONS_SUPPORT / #endif'
in Zend/zend_extensions.c 

Problem fixed by simple patch - TOM

------------ patch ---------
22d21
< #include "zend.h"
145d143
< #if ZEND_EXTENSIONS_SUPPORT
151d148
< #endif

----------- original --------
static void zend_extension_startup(zend_extension *extension)
{
	if (extension->startup) {
		if (extension->startup(extension)!=SUCCESS) {
			DL_UNLOAD(extension->handle);
		}
	}
}


----------- patched file --------
static void zend_extension_startup(zend_extension *extension)
{
#if ZEND_EXTENSIONS_SUPPORT
	if (extension->startup) {
		if (extension->startup(extension)!=SUCCESS) {
			DL_UNLOAD(extension->handle);
		}
	}
#endif
}