On 04/04/2018 09:59 PM, Masahiro Yamada wrote:
2018-03-29 9:48 GMT+09:00 Laura Abbott <labbott@xxxxxxxxxx>:
Similar to AFLAGS_KBUILD, there may be uses (e.g. hardening) for passing in
additional flags to host programs. Allow these to be passed in from the
environment.
Signed-off-by: Laura Abbott <labbott@xxxxxxxxxx>
---
Documentation/kbuild/kbuild.txt | 9 +++++++++
Makefile | 3 +++
2 files changed, 12 insertions(+)
diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt
index ac2363ea05c5..3751a4bc8596 100644
--- a/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.txt
@@ -24,6 +24,15 @@ KAFLAGS
--------------------------------------------------
Additional options to the assembler (for built-in and modules).
+AFLAGS_HOSTCFLAGS
+--------------------------------------------------
+Additional options passed to the compiler when building host programs.
+
+AFLAGS_HOSTLDFLAGS
+--------------------------------------------------
+Additional options passed to the linker (through the compiler) when buidling
+host programs.
+
I am afraid you misunderstood the meaning of 'AFLAGS'.
AFLAGS is not 'Additional flags', but 'Assembler flags'
that are used for compiling *.S files.
AFLAGS for host programs is weird.
I see similar proposals from different people.
I replied like follows:
https://lkml.org/lkml/2018/2/28/178
However, Robin seems busy lately.
I will wait a bit, then
if nobody does this, I may do it.
Thanks for the pointer. I'll keep an eye out for those patches.
AFLAGS_MODULE
--------------------------------------------------
Additional module specific options to use for $(AS).
diff --git a/Makefile b/Makefile
index 7ba478ab8c82..2cab3f8d489c 100644
--- a/Makefile
+++ b/Makefile
@@ -367,6 +367,9 @@ HOSTCXXFLAGS := -O2 $(HOST_LFS_CFLAGS)
HOSTLDFLAGS := $(HOST_LFS_LDFLAGS)
HOST_LOADLIBES := $(HOST_LFS_LIBS)
+HOSTCFLAGS += $(AFLAGS_HOSTCFLAGS)
+HOSTLDFLAGS += $(AFLAGS_HOSTLDFLAGS)
+
# Make variables (CC, etc...)
AS = $(CROSS_COMPILE)as
LD = $(CROSS_COMPILE)ld
--
2.16.2
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