[llvm-commits] [PATCH] Provide debug syms in release builds

Daniel Dunbar daniel at zuster.org
Sat Sep 26 01:15:24 CDT 2009


On Fri, Sep 25, 2009 at 1:41 PM, Jeffrey Yasskin <jyasskin at google.com> wrote:
> New patch. Does this look better? (I'd already submitted the first one
> on Chris's review, so this is just relative to that.)

LGTM.

> Also at http://codereview.appspot.com/124047
>
> On Fri, Sep 25, 2009 at 11:48 AM, Jeffrey Yasskin <jyasskin at google.com> wrote:
>> It looked like DEBUG_RUNTIME only affected .bc files, which can only
>> be used if the compiler is part of the runtime.

I'm not sure what "if the compiler is part of the runtime" means. The
distinction I was making was that runtime files are built for use on
the target, whereas the conceptual option you want (to having debug
info in the compiler) applies to the host. To give an example of why
this matters to me, klee use the LLVM makefile infrastructure to build
various runtime libraries of .bc files -- I almost always want those
to be built with DEBUG_RUNTIME, so klee can show source level debug
information about them when linked in. On the other hand, whether or
not I want DEBUG_SYMBOLS depends on how much disk space I feel like
wasting. :)

Thanks for the patch!

 - Daniel

>> But I can change it.
>> Do DEBUG_SYMBOLS and --enable-debug-symbols work for you?
>>
>> On Fri, Sep 25, 2009 at 11:43 AM, Daniel Dunbar <daniel at zuster.org> wrote:
>>> DEBUG_RUNTIME is something else entirely, and should not be conflated
>>> with the behavior you want (it is about RUNTIME pieces, which are
>>> conceptually part of the target, whereas you are wanting something for
>>> the host).
>>>
>>> I think this should come in under a different Makefile variable and
>>> configure option.
>>>
>>>  - Daniel
>>>
>>> On Fri, Sep 25, 2009 at 12:27 AM, Jeffrey Yasskin <jyasskin at google.com> wrote:
>>>> This patch causes the --enable-debug-runtime configure flag and the
>>>> DEBUG_RUNTIME Makefile variable to pass -g to gcc when building LLVM's
>>>> objects. Without this, it's very hard to debug crashes that happen in
>>>> Release-Asserts mode but not Debug mode.
>>>>
>>>> Jeffrey
>>>>
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>>>>
>>>>
>>>
>>
>




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