Re: OS back-compatibility
Re: OS back-compatibility
- Subject: Re: OS back-compatibility
- From: Chris Espinosa <email@hidden>
- Date: Sun, 23 Apr 2006 12:05:46 -0700
On Apr 23, 2006, at 11:15 AM, Jonathan Taylor wrote:
For a long time I've avoided the problem of OS back-compatibility
by releasing a CFM-only version of my program. I'd like to include
both a CFM and a Mach-o binary in the package for full
compatibility, but I am having limited success
I'm developing under Tiger, and I've set the target SDK version to
10.1.5 and deployment target to 10.1. When I do this, I get the
following link errors:
/usr/bin/ld: warning can't open dynamic library: /Developer/SDKs/
MacOSX10.1.5.sdk/usr/lib/system/libmathCommon.A.dylib referenced
from: /usr/lib/gcc/powerpc-apple-darwin8/4.0.1/../../../
libSystem.dylib (checking for undefined symbols may be affected)
(No such file or directory, errno = 2)
/usr/bin/ld: Undefined symbols:
_errors referenced from CarbonCore expected to be defined in libSystem
_nan referenced from libSystem expected to be defined in /usr/lib/
system/libmathCommon.A.dylib
_feraiseexcept referenced from libSystem expected to be defined in /
usr/lib/system/libmathCommon.A.dylib
_nanf referenced from libSystem expected to be defined in /usr/lib/
system/libmathCommon.A.dylib
_remquo referenced from libSystem expected to be defined in /usr/
lib/system/libmathCommon.A.dylib
collect2: ld returned 1 exit status
I can't find anything in the archives referring to this problem.
Can anyone suggest what I'm doing wrong? libmathCommon.A.dylib is
indeed not present in the directory it's looking in: there seems to
be no such file in the 10.1.5 SDK tree, and it doesn't exist on a
10.1 system I looked on. Unfortunately I haven't the faintest idea
what I've done wrong to cause those errors: they happen with the
built-in Carbon Application project template if I set target SDK
and deployment target to 10.1.5.
See http://developer.apple.com/documentation/DeveloperTools/
Conceptual/cross_development/HowItWorks/chapter_2_section_9.html,
"Limitations." Weak-linking was not impmented in 10.1. So while you
can use the SDK to cross-develop to 10.1 exclusively, you can't cross-
develop for a range of OS versions that includes 10.1.
Chris
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