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[PATCH 4/5] xen: build: add support for CFLAGS_REMOVE variable
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Date: Fri, 29 Nov 2024 01:49:10 +0000
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- Cc: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- Delivery-date: Fri, 29 Nov 2024 01:49:28 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHbQgDi3w2c4ZYqbkyJK+dadw8SYA==
- Thread-topic: [PATCH 4/5] xen: build: add support for CFLAGS_REMOVE variable
This variable can be used in cases when we need to remove certain
CFLAGS for particular object file. One such case is
-mgeneral-regs-only flags that should be omitted when we are building
an object file that uses not only general registers.
Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>
---
xen/Rules.mk | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/Rules.mk b/xen/Rules.mk
index d759cccee3..478318537f 100644
--- a/xen/Rules.mk
+++ b/xen/Rules.mk
@@ -179,7 +179,7 @@ cpp_flags = $(filter-out -Wa$(comma)% -flto,$(1))
# Calculation of flags, first the generic flags, then the arch specific flags,
# and last the flags modified for a target or a directory.
-c_flags = -MMD -MP -MF $(depfile) $(XEN_CFLAGS)
+c_flags = -MMD -MP -MF $(depfile) $(filter-out $(CFLAGS_REMOVE),$(XEN_CFLAGS))
a_flags = -MMD -MP -MF $(depfile) $(XEN_AFLAGS)
include $(srctree)/arch/$(SRCARCH)/Rules.mk
--
2.47.0
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