Andrew:
  I did some investigation. Seemly, there is no way to disable VS command line 
warning.

Thanks
Liming
From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf Of Andrew 
Fish via Groups.Io
Sent: Thursday, October 31, 2019 10:07 AM
To: devel@edk2.groups.io; Gao, Liming <liming....@intel.com>
Cc: tiger...@zhaoxin.com
Subject: Re: [edk2-devel] [edk2] NOOPT and PcdOptimizeCompilerEnable

Liming,

For gcc/clang if you repeat an argument the last argument wins. This is the 
default behavior and it does not warn, as it is designed to work with features 
like PcdOptimizeCompilerEnable.

If VC++ warns for this behavior should we disable D9025 for VC++ so all the 
toolchains have the same behavior?

Thanks,

Andrew Fish


On Oct 30, 2019, at 6:46 PM, Liming Gao 
<liming....@intel.com<mailto:liming....@intel.com>> wrote:

Yes. This is the expect behavior. Compiler optimization is disabled, then Od 
option will be used for VS tool chain.

From: devel@edk2.groups.io<mailto:devel@edk2.groups.io> 
[mailto:devel@edk2.groups.io] On Behalf Of Tiger Liu(BJ-RD)
Sent: Thursday, October 31, 2019 9:40 AM
To: devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Gao, Liming 
<liming....@intel.com<mailto:liming....@intel.com>>
Subject: Re: [edk2-devel] [edk2] NOOPT and PcdOptimizeCompilerEnable

Hi, Liming:
Thanks for your explanation.

If setting PcdOptimizeCompilerEnable as disable, then will cause D9025 
compiling warning.
Such as:
cl : Command line warning D9025 : overriding '/O1' with '/Od'

So, is it ok?

Thanks
发件人: devel@edk2.groups.io<mailto:devel@edk2.groups.io> 
<devel@edk2.groups.io<mailto:devel@edk2.groups.io>> 代表 Liming Gao
发送时间: 2019年10月30日 23:00
收件人: devel@edk2.groups.io<mailto:devel@edk2.groups.io>; Tiger Liu(BJ-RD) 
<tiger...@zhaoxin.com<mailto:tiger...@zhaoxin.com>>
主题: Re: [edk2-devel] [edk2] NOOPT and PcdOptimizeCompilerEnable

NOOPT is build target. It includes the compiler option to disable optimization. 
If the platform supports NOOPT target, it can be built with -b NOOPT.

PcdOptimizeCompilerEnable is one feature PCD defined in edk2-platforms. It can 
be used to control the compiler option in [BuildOptions] section. It can also 
be used for DEBUG or RELEASE target.

Thanks
Liming
From: devel@edk2.groups.io<mailto:devel@edk2.groups.io> 
<devel@edk2.groups.io<mailto:devel@edk2.groups.io>> On Behalf Of Tiger 
Liu(BJ-RD)
Sent: Tuesday, October 29, 2019 7:01 PM
To: devel@edk2.groups.io<mailto:devel@edk2.groups.io>
Subject: [edk2-devel] [edk2] NOOPT and PcdOptimizeCompilerEnable

Hi, All:
I have a question about NOOPT and PcdOptimizeCompilerEnable.

If Target = NOOPT, then will disable all optimizations.
And PcdOptimizeCompilerEnable has the same function.

So, What’s the relationship between PcdOptimizeCompilerEnable and NOOPT?

Thanks

Best wishes,

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