[Bug]: Undefined Symbol for architecture arm 64

[MikePendo]

What are the steps to reproduce this issue?

My goal is embed my custom framework with tweak to the deb file and sidelod it to the ipa later on.
MakeFile:

TARGET := iphone:clang:latest:14.4
ARCHS = arm64 arm64e
GO_EASY_ON_ME = 1
FINALPACKAGE = 1
DEBUG = 0
include $(THEOS)/makefiles/common.mk
TWEAK_NAME = SiteReconTweak
SiteReconTweak_FILES = Tweak.x
SiteReconTweak_CFLAGS =  -fobjc-arc -I./MyFramework.framework/Headers
SiteReconTweak_LDFLAGS = -L./MyFramework.framework 
include $(THEOS_MAKE_PATH)/tweak.mk

Tweak.x

#import "MyFrameworkManager.h"
#import <UIKit/UIKit.h>

%hook UIWindow
- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event {
  %orig;
  [[MyFrameworkManager sharedManager] setup:@""];
}

The whole project:

the framework supports the following archs:

MyFramework (for architecture x86_64):	Mach-O 64-bit dynamically linked shared library x86_64
MyFramework (for architecture i386):	Mach-O dynamically linked shared library i386
MyFramework (for architecture armv7):	Mach-O dynamically linked shared library arm_v7
MyFramework (for architecture arm64):	Mach-O 64-bit dynamically linked shared library arm64

I have found the following issues which are similar to mine:
How to include 3rd Party Framework?
My tweak stops working after adding a custom dylib file to it

current error:

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_MyFrameworkManager", referenced from:
      objc-class-ref in Tweak.x.fafea5e8.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I can import the .h but that fail to link any way.

I am aware that embed the framework in such way is not a best practice BUT it still should be possible.
I am also not 100% if my flags in the makefile are correct and where can I find a proper docs about makefile flags.
Can somebody assist me in that matter? or maybe the slicing is not well supported?
Thanks in advance

What happens?

make package

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_MyFrameworkManager", referenced from:
      objc-class-ref in Tweak.x.fafea5e8.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

What were you expecting to happen?

successfully embeds my framework in .deb

Paste any relevant logs, error output, etc.

make package
==> Notice: Build may be slow as Theos isn’t using all available CPU cores on this computer. 
Consider upgrading GNU Make: https://theos.dev/docs/parallel-building
> Making all for tweak SiteReconTweak…
==> Preprocessing Tweak.x…
==> Compiling Tweak.x (arm64)…
==> Linking tweak SiteReconTweak (arm64)…
Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_MyFrameworkManager", referenced from:
      objc-class-ref in Tweak.x.fafea5e8.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[3]: *** [theos/siterecontweak/.theos/obj/arm64/SiteReconTweak.dylib] Error 1
make[2]: *** [theos/siterecontweak/.theos/obj/arm64/SiteReconTweak.dylib] Error 2
make[1]: *** [internal-library-all_] Error 2
make: *** [SiteReconTweak.all.tweak.variables] Error 2

Additional context

No response

What OS are you seeing the problem on?

macOS

What OS version does it have installed?

Monterey

What toolchain and version are you using?

Xcode 13.4

Which SDK version are you using?

iOS 15

What OS is your client device running?

iOS

What OS version does it have installed?

io6

Which device model is it?

iPhone 13 mini

Which jailbreak is it using (if relevant)?

no

[L1ghtmann]

So a few things:

1. -L specifies an additional library search path, you want -F to specify an additional framework search path;

2. -F expects a directory with .frameworks, not a path to a specific .framework, so you'll need to place the .framework in a directory (e.g., ./Frameworks/). That would change the additional include path to -I./Frameworks/MyFramework.framework/Headers/ and the additional framework path to -F./Frameworks/;

3. To fix the undefined symbols issue, you'll want to tell the linker to link the framework. To do that, you'll want to add SiteReconTweak_EXTRA_FRAMEWORKS = MyFramework to your Makefile as well (this just adds -framework MyFramework to the linker flags for you)

I am also not 100% if my flags in the makefile are correct and where can I find a proper docs about makefile flags.

Clang's documentation and ld's documentation are both super helpful when you want to know which flag(s) to use.