Re: [edk2-devel] [edk2] NOOPT and PcdOptimizeCompilerEnable

["Andrew Fish" <afish@apple.com>]

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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.gao@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 <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.gao@intel.com <mailto:liming.gao@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) <TigerLiu@zhaoxin.com <mailto:TigerLiu@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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