Make sure that Utilities.m from the ProtocolBuffers run time is included
and linked to your project.

On Wed, Aug 26, 2015 at 12:21 PM, albright888 [email protected]
wrote:

It seems no matter what I try, I cannot get around a link problem in my
project:

Undefined symbols for architecture arm64:
"computeDoubleSize(int, double)", referenced from:
-[SCFrameScores serializedSize] in Asap.pb.o
"computeFloatSize(int, float)", referenced from:

It is the same for all architectures I try to build for : i386 or x86_64
or arm64
It seems that my project is not finding the protobuf library. I have tried:

• adding ProtocolBuffers.xcodeproject as a sub projet - same problem
• using Cocoapods to install ProtocolBuffers (1.9.8) - same problem
• building ProtcolBuffers.xcodeproject's framework and adding manually
  to my project - same problem

I imagine it is some simple change, but I can't seem to find it.

Thanks for your help!

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#56.

::: E.B. Smith
::: [email protected]
::: gmail

from protobuf-objc.

The ProtcolBuffers.xcodeproject seems to have the Utilities.m is included in the ProtocolBuffers.framework build settings, so if I include this framework in my project, I should have that correct?
It is the case that all the Undefined symbols are methods from the Utilities.m file however. If I run 'nm ProtocolBuffers.framework/ProtocolBuffers' it appears these methods are in there.
I am confused.

from protobuf-objc.

Huh. If 'nm' says it's there, it is.

It seems obvious, but is the linker search path set correctly?

::: E.B. Smith
::: [email protected]
::: https://shimmering.blue
::: gmail

On Wed, Aug 26, 2015 at 2:25 PM, albright888 [email protected]
wrote:

The ProtcolBuffers.xcodeproject seems to have the Utilities.m is included
in the ProtocolBuffers.framework build settings, so if I include this
framework in my project, I should have that correct?
It is the case that all the Undefined symbols are methods from the
Utilities.m file however. If I run 'nm
ProtocolBuffers.framework/ProtocolBuffers' it appears these methods are in
there.

I am confused.

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#56 (comment)
.

from protobuf-objc.

OK, I think I found the smoking gun. I tried a completely clean iOS project, brought in my generated proto objective-c classes, and it was working fine.
I discovered that my project had "Compile Source As" setting to Objective-C++. Turning this to "According to File Type" fixed this issue. I'm not exactly sure why the Objective-C++ setting causes these Utilities.m methods to not be found, but it does in both my projects.

from protobuf-objc.

When that option is set I think it is using C++ name mangling on the
compiled functions, and then the linker is looking for the un-mangled names.

::: E.B. Smith
::: [email protected]
::: https://shimmering.blue
::: gmail

On Fri, Aug 28, 2015 at 8:57 AM, albright888 [email protected]
wrote:

OK, I think I found the smoking gun. I tried a completely clean iOS
project, brought in my generated proto objective-c classes, and it was
working fine.
I discovered that my project had "Compile Source As" setting to
Objective-C++. Turning this to "According to File Type" fixed this issue.
I'm not exactly sure why the Objective-C++ setting causes these Utilities.m
methods to not be found, but it does in both my projects.

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#56 (comment)
.

from protobuf-objc.

Glad you've resolved this.

::: E.B. Smith
::: [email protected]
::: https://shimmering.blue
::: gmail

On Fri, Aug 28, 2015 at 9:01 AM, Edward Smith [email protected] wrote:

When that option is set I think it is using C++ name mangling on the
compiled functions, and then the linker is looking for the un-mangled names.

::: E.B. Smith
::: [email protected]
::: https://shimmering.blue
::: gmail

On Fri, Aug 28, 2015 at 8:57 AM, albright888 [email protected]
wrote:

OK, I think I found the smoking gun. I tried a completely clean iOS
project, brought in my generated proto objective-c classes, and it was
working fine.
I discovered that my project had "Compile Source As" setting to
Objective-C++. Turning this to "According to File Type" fixed this issue.
I'm not exactly sure why the Objective-C++ setting causes these Utilities.m
methods to not be found, but it does in both my projects.

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#56 (comment)
.

from protobuf-objc.

Yes, thanks for your help - and nice work on this package!

from protobuf-objc.