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Rel32 out of range when linking with library built by Xcode, in Xcode
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Rel32 out of range when linking with library built by Xcode, in Xcode


  • Subject: Rel32 out of range when linking with library built by Xcode, in Xcode
  • From: Jay Reynolds Freeman <email@hidden>
  • Date: Tue, 21 Sep 2010 17:53:42 -0700

I am not sure whether this is an Xcode issue or a darwin-dev
issue, but I will start here in case I am missing something
about Xcode build settings.

I have a 64-bit app that I have been building under Xcode 3.2.4
to run on MacOS 10.6.  The app builds and runs fine.  Recently
I decided to move many of the files used in it into a library,
for use in that app and potentially others, and there the trouble
began; the library builds fine, and the remaining source code
files for the app complile fine, but when linking it all together,
I see link-time error messages of the form:

   "Rel32 out of range in <one of my functions>"

My app does indeed use so much data that a 32-bit
jump is not enough.

I see from the web that this issue has been around for a while,
but I cannot find any information as recent as Xcode 3.2.4 and
thought I would ask whether there was anything new I can do
about the problem.  I have the following additional information:

o I did set up the build dependency of the app on the library.

o Both the app and the library are built with the Xcode
  "architectures" and "valid architectures" build settings
  both set to x86_64.

o The build and link of the app has "-arch x86_64" in the
  "Other Linker Flags" build setting.  (The build of the
  library doesn't want it there; documentation indicates that
  the x86_64 setting from "architectures" is passed to
  libtool as described in my next bullet point.)

o I have verified with -v that the setting for x86_64 is
  reaching the command line for both the build of the library
  and the build and link of the application.  In particular,
  libtool shows up with "-arch_only x86_64" as a flag.

o When I (experimentally) moved all the files from the library
  back into the application, and then built the library to contain
  only one simple C++ file (whose entire content is
  "int foo() { return 1; }"), then the build and link goes fine,
  and the app runs.  The function "foo" is not one that my app
  actually calls.

o But when I start moving files that contain code that my app
  uses, back into the library, the above-mentioned out of range
  errors start to occur.

Any advice?

--  Jay Reynolds Freeman
---------------------
email@hidden
http://web.mac.com/jay_reynolds_freeman (personal web site)


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