Experimental Physics and
Industrial Control System

Stephen Norum <[email protected]> · Mon, 23 Feb 2009 09:41:30 -0800

Hello,

I ran into a missing symbol in EPICS base on Mac OS X. Starting in

Mac OS X 10.5 (Leopard), shared libraries and bundles don't have

direct access to environ (man environ).

Shared libraries and bundles don't have direct access to environ,

which is only available to the loader ld(1) when a complete program

is being linked. The environment routines can still be used, but if

direct access to environ is needed, the _NSGetEnviron() routine,

defined in <crt_externs.h>, can be used to retrieve the address of

environ at runtime.

http://developer.apple.com/documentation/Darwin/Reference/Manpages/man7/environ.7.html

I copied libCom's osdEnv.c to base/src/libCom/osi/os/Darwin and added

the following:

/* Starting in Mac OS X 10.5 (Leopard), shared libraries and
 * bundles don't have direct access to environ (man environ).
 *
 * Define environ as (*_NSGetEnviron())
 */
#include <crt_externs.h>
#define environ (*_NSGetEnviron())

Everything seems to work fine with this change and it has been

committed to the trunk and R3-14-2_branch by Eric Norum.

Stephen

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System