Re: [edk2-devel] BaseTools no longer builds on macOS: "error: unknown warning option '-Werror=stringop-overflow'"

["Rebecca Cran" <rebecca@bsdio.com>]

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Thanks, that patch works. Is it too late to get it in for the stable tag?


Reviewed-by: Rebecca Cran <rebecca@bsdio.com>


On 8/25/22 11:49, Andrew Fish via groups.io wrote:
> Maybe having the check last would be cleaner.
>
> *diff --git a/BaseTools/Source/C/DevicePath/GNUmakefile 
> b/BaseTools/Source/C/DevicePath/GNUmakefile*
>
> *index c217674345b1..17f213879e82 100644*
>
> *--- a/BaseTools/Source/C/DevicePath/GNUmakefile*
>
> *+++ b/BaseTools/Source/C/DevicePath/GNUmakefile*
>
> @@ -16,10 +16,12 @@include $(MAKEROOT)/Makefiles/app.makefile
>
>  GCCVERSION = $(shell gcc -dumpversion | awk -F'.' '{print $$1}')
>
>  ifneq ("$(GCCVERSION)", "5")
>
>  ifneq ($(CXX), llvm)
>
> +ifneq ($(DARWIN),Darwin)
>
>  # gcc 12 trips over device path handling
>
>  BUILD_CFLAGS += -Wno-error=stringop-overflow
>
>  endif
>
>  endif
>
> +endif
>
>  LIBS = -lCommon
>
>  ifeq ($(CYGWIN), CYGWIN)
>
>
>
> Thanks,
>
> Andrew Fish
>
>> On Aug 25, 2022, at 10:45 AM, Andrew Fish via groups.io 
>> <afish=apple.com@groups.io> wrote:
>>
>> Rebecca,
>>
>> FYI /usr/bin/gcc has been a redirector into clang for a lot of years.
>>
>> The build picks different default sets of complier flags based on 
>> build type. There is already code that assumes gcc == clang here [1]
>>
>> I think the issue is the check that is wrapping "BUILD_CFLAGS += 
>> -Wno-error=stringop-overflow”. It needs to skip the check on macOS.
>>
>> *diff --git a/BaseTools/Source/C/DevicePath/GNUmakefile 
>> b/BaseTools/Source/C/DevicePath/GNUmakefile*
>> *index c217674345b1..f3c9739617f2 100644*
>> *--- a/BaseTools/Source/C/DevicePath/GNUmakefile*
>> *+++ b/BaseTools/Source/C/DevicePath/GNUmakefile*
>> @@ -14,12 +14,14 @@OBJECTS = DevicePath.o UefiDevicePathLib.o 
>> DevicePathFromText.o DevicePathUtili
>>  include $(MAKEROOT)/Makefiles/app.makefile
>>
>>
>>  GCCVERSION = $(shell gcc -dumpversion | awk -F'.' '{print $$1}')
>> +ifneq ($(DARWIN),Darwin)
>>  ifneq ("$(GCCVERSION)", "5")
>>  ifneq ($(CXX), llvm)
>>  # gcc 12 trips over device path handling
>>  BUILD_CFLAGS += -Wno-error=stringop-overflow
>>  endif
>>  endif
>> +endif
>>
>>
>>  LIBS = -lCommon
>>  ifeq ($(CYGWIN), CYGWIN)
>>
>>
>> [1] 
>> https://github.com/tianocore/edk2/blob/master/BaseTools/Source/C/Makefiles/header.makefile#L83
>>
>> Thanks,
>>
>> Andrew Fish
>>
>>> On Aug 25, 2022, at 9:20 AM, Rebecca Cran <rebecca@bsdio.com> wrote:
>>>
>>> BaseTools no longer builds on macOS (12.5.1, Monterey), because 
>>> 'gcc' in /usr/bin is really clang.
>>>
>>> I tried installing gcc 12 from Homebrew, but the build then failed 
>>> saying it couldn't find _stdio.h.
>>>
>>> It appears the breakage might have been introduced in this commit 
>>> back in March:
>>>
>>> commit 22130dcd98b4d4b76ac8d922adb4a2dbc86fa52c
>>> Author: Gerd Hoffmann <kraxel@redhat.com>
>>> Date:   Thu Mar 24 20:04:36 2022 +0800
>>>
>>>     Basetools: turn off gcc12 warning
>>>
>>> Running "make -C BaseTools" produces the following error:
>>>
>>>
>>> /Library/Developer/CommandLineTools/usr/bin/make -C DevicePath
>>> gcc  -c  -I .. -I ../Include/Common -I ../Include/ -I 
>>> ../Include/IndustryStandard -I ../Common/ -I .. -I . -I 
>>> ../Include/X64/ -MD -fshort-wchar -fno-strict-aliasing -Wall -Werror 
>>> -Wno-deprecated-declarations -Wno-self-assign -Wno-unused-result 
>>> -nostdlib -g -O2  -Wno-error=stringop-overflow DevicePath.c -o 
>>> DevicePath.o
>>> error: unknown warning option '-Werror=stringop-overflow'; did you 
>>> mean '-Werror=shift-overflow'? [-Werror,-Wunknown-warning-option]
>>> make[2]: *** [DevicePath.o] Error 1
>>> make[1]: *** [DevicePath] Error 2
>>> make: *** [Source/C] Error 2
>>>
>>>
>>> bcran@procan edk2 % gcc -v
>>> Configured with: --prefix=/Library/Developer/CommandLineTools/usr 
>>> --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
>>> Apple clang version 12.0.5 (clang-1205.0.22.9)
>>> Target: x86_64-apple-darwin21.6.0
>>> Thread model: posix
>>> InstalledDir: /Library/Developer/CommandLineTools/usr/bin
>>>
>>> bcran@procan edk2 % uname -a
>>> Darwin procan.int.bsdio.com 21.6.0 Darwin Kernel Version 21.6.0: Wed 
>>> Aug 10 14:25:27 PDT 2022; root:xnu-8020.141.5~2/RELEASE_X86_64 x86_64
>>>
>>> -- 
>>> Rebecca Cran
>>>
>>
>
> 

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