@ianlancetaylor

What is the exact command that you ran? What is the complete and exact output?

I don't know how the -framework option normally works. Does passing -framework third-part-framework to the linker work when linking a C program?

Sorry,
I know how to use the system framework of system in folder "/System/Library/Frameworks" like below,
/* #cgo LDFLAGS: -framework CoreFoundation #include <CoreFoundation/CoreFoundation.h> */
but I don't know how to use the framework created by myself.

You need to install your framework to the expected location.
See: https://developer.apple.com/library/archive/documentation/MacOSX/Conceptual/BPFrameworks/Tasks/InstallingFrameworks.html#//apple_ref/doc/uid/20002261-BBCCFBJA

If not you need to use the -F flag to specify a location to look for it.
See: https://clang.llvm.org/docs/ClangCommandLineReference.html#introduction

For proper help I suggest you ask around in the normal OSX developer places as this is not a Go specific thing. https://developer.apple.com/support/

Thank you,
I can use framework normally if the framework is build by xcode in the below way,
#cgo LDFLAGS: -F ${SRCDIR} -framework xxx.framework
but I have a framework that I build by go mobile, and I encountered some error in this way, as below:
duplicate symbol __cgo_panic in: $WORK/b001/_cgo_main.o ./framework/Mobile.framework/Mobile(go.o) duplicate symbol __cgo_topofstack in: $WORK/b001/_cgo_main.o ./framework/Mobile.framework/Mobile(go.o) duplicate symbol _crosscall2 in: $WORK/b001/_cgo_main.o ./framework/Mobile.framework/Mobile(go.o) duplicate symbol __cgo_wait_runtime_init_done in: $WORK/b001/_cgo_main.o ./framework/Mobile.framework/Mobile(000012.o) ld: 4 duplicate symbols for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation)

If there are C/C++/etc... sources in the same folder as Go sources, they will automatically be compiled and included into the Go program without -framework. So by putting the -framework flag you are telling it to include them twice.

Also should mention, you should not compile with gomobile and trying to include that into another Go program/library.

Hi there,
We have decided that our experiment to allow questions on the issue tracker has not had the outcome we desired, so I am closing this issue. I'm sorry that we can't continue to answer your question here.

There are many other methods to get help if you're still looking for answers:

• Stack Overflow with questions tagged "go"

• The Go Forum, a web-based forum

• Gophers Slack, use the invite app for access. The #general channel is a good starting point.

• Go Community on Hashnode with questions and posts tagged with "go"

• The golang-nuts mailing list

• IRC channel #go-nuts on Freenode

Thanks