Re: [PATCH] BaseTools/header.makefile: revert gcc-8 "-Wno-xxx" options on OSX

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

On 7 March 2018 at 20:28, Laszlo Ersek <lersek@redhat.com> wrote:
> On 03/07/18 12:51, Gao, Liming wrote:
>> Reviewed-by: Liming Gao <liming.gao@intel.com>
>
> Thank you, Liming.
>
> Ard, are you OK with this patch as well?
>

Sure

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

>>> -----Original Message-----
>>> From: Laszlo Ersek [mailto:lersek@redhat.com]
>>> Sent: Wednesday, March 7, 2018 5:33 PM
>>> To: edk2-devel-01 <edk2-devel@lists.01.org>
>>> Cc: Gao, Liming <liming.gao@intel.com>; Zhu, Yonghong <yonghong.zhu@intel.com>
>>> Subject: [PATCH] BaseTools/header.makefile: revert gcc-8 "-Wno-xxx" options on OSX
>>>
>>> I recently added the gcc-8 specific "-Wno-stringop-truncation" and
>>> "-Wno-restrict" options to BUILD_CFLAGS, both for "Darwin" (XCODE5 /
>>> clang, OSX) and otherwise (gcc, Linux / Cygwin).
>>>
>>> I also regression-tested the change with gcc-4.8 on Linux -- gcc-4.8 does
>>> not know either of the (gcc-8 specific) "-Wno-stringop-truncation" and
>>> "-Wno-restrict" options, yet the build completed fine (by GCC design).
>>>
>>> Regarding OSX, my expectation was that
>>>
>>> - XCODE5 / clang would either recognize these warnings options (because
>>>   clang does recognize most -W options of gcc),
>>>
>>> - or, similarly to gcc, clang would simply ignore the "-Wno-xxx" flags
>>>   that it didn't recognize.
>>>
>>> Neither is the case; the new flags have broken the BaseTools build on OSX.
>>> Revert them (for OSX only).
>>>
>>> Cc: Liming Gao <liming.gao@intel.com>
>>> Cc: Yonghong Zhu <yonghong.zhu@intel.com>
>>> Reported-by: Liming Gao <liming.gao@intel.com>
>>> Fixes: 1d212a83df0eaf32a6f5d4159beb2d77832e0231
>>> Fixes: 9222154ae7b3eef75ae88cdb56158256227cb929
>>> Contributed-under: TianoCore Contribution Agreement 1.1
>>> Signed-off-by: Laszlo Ersek <lersek@redhat.com>
>>> ---
>>>  BaseTools/Source/C/Makefiles/header.makefile | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/BaseTools/Source/C/Makefiles/header.makefile b/BaseTools/Source/C/Makefiles/header.makefile
>>> index 065a998bf5de..db436773cf40 100644
>>> --- a/BaseTools/Source/C/Makefiles/header.makefile
>>> +++ b/BaseTools/Source/C/Makefiles/header.makefile
>>> @@ -71,7 +71,7 @@ INCLUDE = $(TOOL_INCLUDE) -I $(MAKEROOT) -I $(MAKEROOT)/Include/Common -I $(MAKE
>>>  BUILD_CPPFLAGS = $(INCLUDE) -O2
>>>  ifeq ($(DARWIN),Darwin)
>>>  # assume clang or clang compatible flags on OS X
>>> -BUILD_CFLAGS = -MD -fshort-wchar -fno-strict-aliasing -Wall -Werror -Wno-deprecated-declarations -Wno-stringop-truncation
>>> -Wno-restrict -Wno-self-assign -Wno-unused-result -nostdlib -c -g
>>> +BUILD_CFLAGS = -MD -fshort-wchar -fno-strict-aliasing -Wall -Werror -Wno-deprecated-declarations -Wno-self-assign
>>> -Wno-unused-result -nostdlib -c -g
>>>  else
>>>  BUILD_CFLAGS = -MD -fshort-wchar -fno-strict-aliasing -Wall -Werror -Wno-deprecated-declarations -Wno-stringop-truncation
>>> -Wno-restrict -Wno-unused-result -nostdlib -c -g
>>>  endif
>>> --
>>> 2.14.1.3.gb7cf6e02401b
>>
>