macOS Linking error running with dlv debug

[adammw]

Please answer the following before submitting your issue:

1. What version of Delve are you using (dlv version)? 1.22.1
2. What version of Go are you using? (go version)? go version go1.22.2 darwin/amd64
3. What operating system and processor architecture are you using? Mac OS 14.4.1 (23E224) amd64

Reproduction Steps

• Clone Sample code - Gist https://gist.github.com/adammw/22fbc0c16e40cfd1241a874e3914a89d
• Run go mod init to create go.mod file
• Run go build . and see that it succeeds
• Run go run . and see that it runs correctly:

result=65280

• Run dlv debug . and see that it errors out at the linking step:

/usr/local/opt/go/libexec/pkg/tool/darwin_amd64/link: running cc failed: exit status 1
Undefined symbols for architecture x86_64:
  "_decode_int32", referenced from:
      _sample_func in 000002.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

exit status 1

[aarzilli]

This is not an issue with delve. You can reproduce it with just go by doing:

$ CGO_CFLAGS='-O0 -g' go build
# example.com
$GOROOT/pkg/tool/darwin_amd64/link: running clang failed: exit status 1
ld: warning: -no_pie is deprecated when targeting new OS versions
Undefined symbols for architecture x86_64:
  "_decode_int32", referenced from:
      _sample_func in 000002.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

It should be reported to https://github.com/golang/go.
You can work around this problem by doing export CGO_CFLAGS=-g before executing delve.