GNU assembler will consider '/' as the start of comment marker on some platforms. This is incorrect with Xen's usage, which does use '/' in assembly files as a mathematical operator.
The behavior of the assembler can be altered by passing the --divide option; unconditionally pass this option when available to force the expected behavior. Reported-by: Jan Beulich <[email protected]> Signed-off-by: Roger Pau Monné <[email protected]> --- xen/Makefile | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/xen/Makefile b/xen/Makefile index 31352d4cd260..eee0262933a7 100644 --- a/xen/Makefile +++ b/xen/Makefile @@ -405,6 +405,11 @@ $(call cc-option-add,CFLAGS,CC,-Winit-self) CFLAGS += -pipe -D__XEN__ -include $(srctree)/include/xen/config.h CFLAGS-$(CONFIG_DEBUG_INFO) += -g +# The GNU assembler will interpret '/' as a comment start marker instead of a +# divide on some platforms. Pass --divide when when available to signal '/' is +# always used as an operator in assembly. +$(call cc-option-add,CFLAGS,CC,-Wa$$(comma)--divide) + ifneq ($(CONFIG_CC_IS_CLANG),y) # Clang doesn't understand this command line argument, and doesn't appear to # have a suitable alternative. The resulting compiled binary does function, -- 2.51.0
