[PATCH] kbuild: move modkern_{c,a}flags to Makefile.lib from Makefile.build

From: Masahiro Yamada
Date: Mon Aug 19 2019 - 04:59:15 EST


Makefile.lib is included by Makefile.modfinal as well as Makefile.build.

Move modkern_cflags to Makefile.lib in order to simplify cmd_cc_o_c
in Makefile.modfinal. Move modkern_cflags as well for consistency.

Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
---

scripts/Makefile.build | 13 -------------
scripts/Makefile.lib | 12 ++++++++++++
scripts/Makefile.modfinal | 6 +++---
3 files changed, 15 insertions(+), 16 deletions(-)

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 10adf3b558de..b46e608f9931 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -92,15 +92,6 @@ endif
# Compile C sources (.c)
# ---------------------------------------------------------------------------

-# Default is built-in, unless we know otherwise
-part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y)
-
-modkern_cflags = \
- $(if $(part-of-module), \
- $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
- $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
-quiet_modtag = $(if $(part-of-module),[M], )
-
quiet_cmd_cc_s_c = CC $(quiet_modtag) $@
cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS), $(c_flags)) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<

@@ -304,10 +295,6 @@ $(obj)/%.h.s: $(src)/%.h FORCE
# Compile assembler sources (.S)
# ---------------------------------------------------------------------------

-modkern_aflags = $(if $(part-of-module), \
- $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \
- $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL))
-
# .S file exports must have their C prototypes defined in asm/asm-prototypes.h
# or a file that it includes, in order to get versioned symbols. We build a
# dummy C file that includes asm-prototypes and the EXPORT_SYMBOL lines from
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 264611972c4a..888e5c830646 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -159,6 +159,18 @@ _cpp_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
endif
endif

+part-of-module = $(if $(filter $(basename $@).o, $(real-obj-m)),y)
+quiet_modtag = $(if $(part-of-module),[M], )
+
+modkern_cflags = \
+ $(if $(part-of-module), \
+ $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE), \
+ $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL))
+
+modkern_aflags = $(if $(part-of-module), \
+ $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE), \
+ $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL))
+
c_flags = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(LINUXINCLUDE) \
-include $(srctree)/include/linux/compiler_types.h \
$(_c_flags) $(modkern_cflags) \
diff --git a/scripts/Makefile.modfinal b/scripts/Makefile.modfinal
index 2e49d536a9b3..059dbcf5ae77 100644
--- a/scripts/Makefile.modfinal
+++ b/scripts/Makefile.modfinal
@@ -17,12 +17,12 @@ modules := $(sort $(shell cat $(MODORDER)))
__modfinal: $(modules)
@:

-# modname is set to make c_flags define KBUILD_MODNAME
+# modname and part-of-module are set to make c_flags define proper module flags
modname = $(notdir $(@:.mod.o=))
+part-of-module = y

quiet_cmd_cc_o_c = CC [M] $@
- cmd_cc_o_c = $(CC) $(c_flags) $(KBUILD_CFLAGS_MODULE) $(CFLAGS_MODULE) \
- -c -o $@ $<
+ cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $<

%.mod.o: %.mod.c FORCE
$(call if_changed_dep,cc_o_c)
--
2.17.1