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 <rebe...@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 <kra...@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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