Thanks, Laszlo. 

And the last "workaround" patch can be dropped, since we introduced the new 
[Includes.Common.Private] setting in Package DEC file (from my last patch). 
This will help to eliminate the potential macro re-definition risk. 
It's still valuable to refine openssl e_os2.h definition for consistence, which 
was submitted / approved by the PR 
(https://github.com/openssl/openssl/pull/3121)


Best Regards & Thanks,
LONG, Qin

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of
> Laszlo Ersek
> Sent: Thursday, April 6, 2017 4:55 PM
> To: Long, Qin <qin.l...@intel.com>; edk2-devel@lists.01.org
> Cc: Ye, Ting <ting...@intel.com>; Wu, Hao A <hao.a...@intel.com>; Tian,
> Feng <feng.t...@intel.com>; Dong, Eric <eric.d...@intel.com>
> Subject: Re: [edk2] [PATCH v2 0/4] Resolving Some CryptoPkg Build Issues
> 
> On 04/01/17 07:38, Long Qin wrote:
> > From: Qin Long <qin.l...@intel.com>
> >
> > V2:
> >   Updated the patches as the comments from Laszlo (ler...@redhat.com).
> >   And filed two TianoCore BZ (#455, #456) to track the further follow-ups
> >   on openssl and EDKII-CryptoPkg:
> >     https://bugzilla.tianocore.org/show_bug.cgi?id=455
> >     https://bugzilla.tianocore.org/show_bug.cgi?id=456
> >
> > This patch series introduced some hotfixes and workaround to resolve
> > the build issues under different toolchain, and from potential
> > external consumers, including:
> >   - build warning under GCC48 and VS2010 toolchain;
> >   - Potential unresolved external symbol link issue;
> >   - One bug fix of timer() wrapper in ConstantTimeClock.c;
> >   - One workaround to resolve macro re-definitions issue from some
> >     external BaseCryptLib consumer.
> >
> >   (https://github.com/qloong/edk2/commits/dev-openssl-hotfix)
> >
> > Qin Long (4):
> >   CryptoPkg/OpensslLib: Suppress extra build warnings in openssl source
> >   CryptoPkg: Fix possible unresolved external symbol issue.
> >   CryptoPkg/BaseCryptLib: Adding NULL checking in time() wrapper.
> >   CryptoPkg: One workaround to resolve potential build issue.
> >
> >  CryptoPkg/Include/CrtLibSupport.h                  |   1 +
> >  CryptoPkg/Include/openssl/e_os2.h                  | 321
> +++++++++++++++++++++
> >  .../BaseCryptLib/SysCall/ConstantTimeClock.c       |   6 +-
> >  CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c  |  10 +-
> >  CryptoPkg/Library/OpensslLib/OpensslLib.inf        |  15 +-
> >  CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf  |  15 +-
> >  6 files changed, 355 insertions(+), 13 deletions(-)  create mode
> > 100644 CryptoPkg/Include/openssl/e_os2.h
> >
> 
> I can see the upstream OpenSSL pull req / issue report references in
> TianoCore BZs 455 and 456.
> 
> series
> Reviewed-by: Laszlo Ersek <ler...@redhat.com>
> 
> Thanks!
> Laszlo
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