Laszlo:
  I mean to keep the minimal change in PCCT. I don't prevent the necessary 
change in PCCT code. Per your comments, this change in PCCT is necessary. If 
so, I am OK to this patch. 

  Reviewed-by: Liming Gao <liming....@intel.com>

Thanks
Liming
>-----Original Message-----
>From: Laszlo Ersek [mailto:ler...@redhat.com]
>Sent: Tuesday, August 07, 2018 12:41 AM
>To: Gao, Liming <liming....@intel.com>
>Cc: edk2-devel-01 <edk2-devel@lists.01.org>
>Subject: Re: [edk2] [PATCH 0/6] BaseTools/Source/C: take EXTRA_OPTFLAGS
>and EXTRA_LDFLAGS from the caller
>
>Hi Liming,
>
>On 08/06/18 17:18, Laszlo Ersek wrote:
>> On 08/06/18 16:48, Gao, Liming wrote:
>>> Laszlo:
>>>   Thanks for your detail information. I understand EXTRA_OPTFLAGS.
>>>   So, its name is OK to me.
>>>
>>>   On Pccts, it is the third party code. I would like to make the
>>>   minimal change. So, I ask whether we not touch it.
>>
>> OK, thank you, I'll look into that.
>
>I started writing up a summary for the stake-holders of
><https://bugzilla.redhat.com/show_bug.cgi?id=1540244>, explaining that
>some source code that goes into the VfrCompile utility is native to the
>edk2 project, while the code that *generates* the lexer and parser
>source code for VfrCompile comes from the PCCTS project, and is used
>only temporarily. And, that this should be a good enough reason to
>ignore PCCTS, because in upstream the maintainers prefer not touching
>PCCTS source.
>
>However: our git history for "BaseTools/Source/C/VfrCompile/Pccts" does
>not corroborate this preference.
>
>Consider:
>
>(a)  1  30fdf1140b8d [2009-07-17] Check In tool source code based on Build tool
>project revision r1655.
>     2  b69fd59e6f1a [2014-08-25] Fix nmake cleanall bugs.
>     3  5ddccf34c4f5 [2015-07-08] BaseTools: Fix build on FreeBSD and allow use
>of non-gcc system compiler
>     4  819a2394f17f [2016-01-11] BaseTools/VfrCompile: honor CC if it is set
>     5  4ac14ceae076 [2016-09-08] BaseTools VfrCompile Pccts: Update GCC Flags
>to the specific one with BUILD_ prefix
>
>    Commits #3 through #5 modify the same set of files as my patches 4-6
>    -- the "antlr" and "dlg" makefiles.
>
>(b)  6  99e55970ff07 [2016-10-20] BaseTools: Fix typos in comments and
>variables
>
>    This is from Gary's series
>
>      [edk2] [PATCH 00/33] Fix typos in comments and variables
>
>    and it modifies "dlg" source code.
>
>(c)  7  bab5ad2fd14b [2016-11-08] BaseTools/VfrCompile: Add checks for array
>access
>     8  77dee0b1859d [2016-11-08] BaseTools/VfrCompile: Avoid freeing freed
>memory in classes
>     9  d55638362727 [2016-11-08] BaseTools/VfrCompile/Pccts: Add virtual
>destructor for class DLGInputStream
>    10  fef15ecd20dd [2016-11-08] BaseTools/VfrCompile/Pccts: Make
>assignment operator not returning void
>
>    These four commits (#7 through #10) are from Hao's series
>
>      [edk2] [PATCH v2 00/53] Resolve issues for C source codes in BaseTools
>
>    and they modify PCCTS headers.
>
>(d) 11  5b26adf03a0b [2016-12-20] BaseTools: fix format-security build
>warnings
>    12  8230d45bba51 [2016-12-20] BaseTools: fix format type build warnings
>
>    Commits #11 and #12 are from Heyi's series
>
>      [edk2] [PATCH 0/4] Fix GCC build warnings for BaseTools
>
>    and they modify the "antlr" source code.
>
>(e) 13  0a64f49fde09 [2016-12-23] BaseTools/Pccts: Resolve GCC sting format
>mismatch build warning
>
>    This patch is again from Hao, and it modifies utility code in PCCTS
>    that is built into both "dlg" and "antlr" (namely, "set.c").
>
>(f) 14  a5b84d3480b4 [2018-01-02] BaseTools: eliminate unused expression
>result
>    15  4e97974c1e52 [2018-01-02] BaseTools: silence parentheses-equality
>warning
>
>    These are from a series that Zenith432 posted without a cover
>    letter. They modify "antlr" and "dlg" source code.
>
>The above examples imply that we have modified both the makefiles and
>the source code under PCCTS, over time.
>
>Do you still prefer that I drop those parts of my series?
>
>I can attempt to do that, but then I cannot tell the RHBZ#1540244
>stakeholders that we "generally" avoid patching the bundled PCCTS
>instance -- because, we do patch it whenever necessary.
>
>Thanks!
>Laszlo
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