From: Eric Hodel <drbrain@...7.net>
Date: 2012-02-23T08:56:54+09:00
Subject: [ruby-core:42812] [ruby-trunk - Bug #6064][Open] unsupported -ggdb flag is used with clang 3.1


Issue #6064 has been reported by Eric Hodel.

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Bug #6064: unsupported -ggdb flag is used with clang 3.1
https://bugs.ruby-lang.org/issues/6064

Author: Eric Hodel
Status: Open
Priority: Normal
Assignee: 
Category: build
Target version: 
ruby -v: ruby 2.0.0dev (2012-02-23 trunk 34755) [x86_64-darwin11.3.0]


=begin
I upgraded to Xcode 4.3 which has clang 3.1:

  Apple clang version 3.1 (tags/Apple/clang-318.0.45) (based on LLVM 3.1svn)
  Target: x86_64-apple-darwin11.3.0
  Thread model: posix

After running ((%autoconf; CC=clang ./configure; make%)) clang complains about -ggdb:

  clang: warning: argument unused during compilation: '-ggdb'

Also, the clang manual page notes for -g -O0 will generate the best information:

       -g  Generate debug information.  Note that Clang debug information
           works best at -O0.  At higher optimization levels, only line number
           information is currently available.

=end



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