Makefile-footer.gmk

Timestamp:

Jun 29, 2022 1:17:33 AM (2 years ago)

Author:

vboxsync

Message:

linux/Makefile-footer.gmk: Better comments regarding LLVM/clang. bugref:10247

File:

trunk/src/VBox/Installer/linux/Makefile-footer.gmk

-              r95411
+              r95417
  ifeq ($(shell expr $(KERN_VER) : '[23]\.'),0)
   VBOXMOD_0_KFLAGS  += -Werror -Wall -Wno-array-bounds
+  # Disable this for DEBUG clang builds. There are parts of kernel which will use __builtin_frame_address with argument > 0.
+  ifneq ($(LLVM),)
+# clang objects to calls to __builtin_frame_address with a non-zero argument
+# on general principles in -Wall mode. The x86 linux kernel has two such calls
+# in the thread_info.h / arch_within_stack_frames(), though probably safe.
+  ifndef ($(LLVM),) # (This is how the Linux root Makefile (since 5.7) does the test.)
    VBOXMOD_0_KFLAGS += -Wno-frame-address
   endif

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