* [PATCH] kbuild: add LDFLAGS_KERNEL to pass additional linker flags for vmlinux
@ 2018-07-06 6:34 Masahiro Yamada
0 siblings, 0 replies; only message in thread
From: Masahiro Yamada @ 2018-07-06 6:34 UTC (permalink / raw)
To: linux-kbuild
Cc: Sam Ravnborg, Masahiro Yamada, linux-doc, linux-kernel,
Jonathan Corbet, Michal Marek
Kbuild provides LDFLAGS_MODULE to allows users to give additional
options for linking modules, but there is no way to append flags for
linking vmlinux.
It is true LDFLAGS_vmlinux specifies the linker options for vmlinux,
but it is only for internal-use.
We have CFLAGS_KERNEL, AFLAGS_KERNEL already, so LDFLAGS_KERNEL is
the same pattern.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
---
Documentation/kbuild/kbuild.txt | 4 ++++
Makefile | 2 ++
2 files changed, 6 insertions(+)
diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt
index 6c9c69e..f3a0a47 100644
--- a/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.txt
@@ -46,6 +46,10 @@ CFLAGS_MODULE
--------------------------------------------------
Additional module specific options to use for $(CC).
+LDFLAGS_KERNEL
+--------------------------------------------------
+Additional options used for $(LD) when linking vmlinux.
+
LDFLAGS_MODULE
--------------------------------------------------
Additional options used for $(LD) when linking modules.
diff --git a/Makefile b/Makefile
index 58bd78b..6f9f4b1 100644
--- a/Makefile
+++ b/Makefile
@@ -848,6 +848,8 @@ ifeq ($(CONFIG_STRIP_ASM_SYMS),y)
LDFLAGS_vmlinux += $(call ld-option, -X,)
endif
+LDFLAGS_vmlinux += $(LDFLAGS_KERNEL)
+
# insure the checker run with the right endianness
CHECKFLAGS += $(if $(CONFIG_CPU_BIG_ENDIAN),-mbig-endian,-mlittle-endian)
--
2.7.4
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