> On Mar 29, 2022, at 11:14 AM, gr...@grantlmul.xyz wrote:
> 
> While I can't test this myself, the following does appear to result in a 
> successful build using the same clang version:
> 
> 
> diff --git a/BaseTools/Source/C/DevicePath/GNUmakefile 
> b/BaseTools/Source/C/DevicePath/GNUmakefile
> index b05d2bddfa..81aa35aa31 100644
> --- a/BaseTools/Source/C/DevicePath/GNUmakefile
> +++ b/BaseTools/Source/C/DevicePath/GNUmakefile
> @@ -14,7 +14,9 @@ OBJECTS = DevicePath.o UefiDevicePathLib.o 
> DevicePathFromText.o  DevicePathUtili
>  include $(MAKEROOT)/Makefiles/app.makefile
>  
>  # gcc 12 trips over device path handling
> -BUILD_CFLAGS += -Wno-error=stringop-overflow
> +ifeq($(CC), gcc)
> +  BUILD_CFLAGS += -Wno-error=stringop-overflow
> +endif
>  

Gerd,

I’m not sure if this was caused by my email client but your fix did not work 
for me.
GNUmakefile:17: *** missing separator.  Stop.

I had to add a space after `ifeq` to get it to work.
diff --git a/BaseTools/Source/C/DevicePath/GNUmakefile 
b/BaseTools/Source/C/DevicePath/GNUmakefile
index b05d2bddfa68..ebab1d3e2617 100644
--- a/BaseTools/Source/C/DevicePath/GNUmakefile
+++ b/BaseTools/Source/C/DevicePath/GNUmakefile
@@ -14,7 +14,9 @@ OBJECTS = DevicePath.o UefiDevicePathLib.o 
DevicePathFromText.o  DevicePathUtili
 include $(MAKEROOT)/Makefiles/app.makefile
 
 # gcc 12 trips over device path handling
-BUILD_CFLAGS += -Wno-error=stringop-overflow
+ifeq ($(CC), gcc)
+  BUILD_CFLAGS += -Wno-error=stringop-overflow
+endif
 
 LIBS = -lCommon
 ifeq ($(CYGWIN), CYGWIN)


I had been working around like this previously (I’m not sure about the 
portability of -Wno-unknown-warning-option):

diff --git a/BaseTools/Source/C/DevicePath/GNUmakefile 
b/BaseTools/Source/C/DevicePath/GNUmakefile
index b05d2bddfa68..d08588a81f80 100644
--- a/BaseTools/Source/C/DevicePath/GNUmakefile
+++ b/BaseTools/Source/C/DevicePath/GNUmakefile
@@ -14,7 +14,7 @@ OBJECTS = DevicePath.o UefiDevicePathLib.o 
DevicePathFromText.o  DevicePathUtili
 include $(MAKEROOT)/Makefiles/app.makefile
 
 # gcc 12 trips over device path handling
-BUILD_CFLAGS += -Wno-error=stringop-overflow
+BUILD_CFLAGS += -Wno-error=stringop-overflow -Wno-unknown-warning-option
 
 LIBS = -lCommon
 ifeq ($(CYGWIN), CYGWIN)

Thanks,

Andrew Fish
>  LIBS = -lCommon
>  ifeq ($(CYGWIN), CYGWIN)
> 



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