symbols not found by gdb when using cgo (osx) #5251

gopherbot opened this Issue Apr 9, 2013 · 4 comments


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3 participants

by cgmurray:

What steps will reproduce the problem?

Using attached files:
1. go tool cgo main.go && go build
2. gdb testcgo

What is the expected output?
Symbols found by gdb

What do you see instead?
BFD: /private/tmp/testcgo/testcgo: unknown load command 0x29
BFD: /private/tmp/testcgo/testcgo: unknown load command 0x29
Reading symbols from /private/tmp/testcgo/testcgo...
can't open to read symbols: No such file or directory.
similar warning emitted for main.o, gcc_amd64.o, gcc_darwin_amd64.o, gcc_setenv.o and

Which compiler are you using (5g, 6g, 8g, gccgo)?
go tool cgo main.go && go build

Which operating system are you using?
osx 10.7.5

Which version are you using?  (run 'go version')
go version devel +1a196137ed09 Tue Apr 09 18:17:55 2013 +1000 darwin/amd64
gdb 7.5

Please provide any additional information below.
osx has a concept similar to .pdb-files on windows called .dsym. Such debug-information
is created using the dsymutil. A potential solution is to invoke
the dsymutil and generate a .dsym-directory next to the exe prior to deleting the
temporary object-files.


  1. main.c (58 bytes)
  2. main.go (127 bytes)
  3. main.h (54 bytes)

Comment 1 by cgmurray:

Unable to reproduce this issue with OSX 10.8.3, go 1. 1 and gdb 7.6

davecheney commented May 28, 2013

Comment 2:

Is there anything actionable here, or would you be happy to close this issue?

Status changed to WaitingForReply.

Comment 3 by cgmurray:

As far as I'm concerned the issue can be closed now.

minux commented May 28, 2013

Comment 4:

Status changed to Retracted.

@gopherbot gopherbot locked and limited conversation to collaborators Jun 24, 2016

This issue was closed.

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