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Subject[PATCH 1/3] kbuild: allow user to assign {A,C}FLAGS_MODULE
From 7ae2b4f270b0a6273072d73bbfeaa96815cc24af Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <sam@ravnborg.org>
Date: Mon, 26 Jul 2010 21:03:08 +0200
Subject: [PATCH 1/3] kbuild: allow user to assign {A,C}FLAGS_MODULE
Do not use {A,C}FLAGS_MODULE in the top-level Makefile.
So if user assign a value to one of these variables we the
original value is not lost.
Use a kbuild internal variable that archs can use.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
---
Makefile | 8 ++++----
arch/mips/Makefile | 4 ++--
arch/s390/Makefile | 2 +-
arch/score/Makefile | 2 +-
scripts/Makefile.build | 9 ++++++---
5 files changed, 14 insertions(+), 11 deletions(-)
diff --git a/Makefile b/Makefile
index a14c207..5e72848 100644
--- a/Makefile
+++ b/Makefile
@@ -332,9 +332,8 @@ CHECK = sparse

CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
-Wbitwise -Wno-return-void $(CF)
-MODFLAGS = -DMODULE
-CFLAGS_MODULE = $(MODFLAGS)
-AFLAGS_MODULE = $(MODFLAGS)
+CFLAGS_MODULE =
+AFLAGS_MODULE =
LDFLAGS_MODULE = -T $(srctree)/scripts/module-common.lds
CFLAGS_KERNEL =
AFLAGS_KERNEL =
@@ -355,6 +354,7 @@ KBUILD_CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
-Wno-format-security \
-fno-delete-null-pointer-checks
KBUILD_AFLAGS := -D__ASSEMBLY__
+KBUILD_MODFLAGS := -DMODULE

# Read KERNELRELEASE from include/config/kernel.release (if it exists)
KERNELRELEASE = $(shell cat include/config/kernel.release 2> /dev/null)
@@ -368,7 +368,7 @@ export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS

export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE CFLAGS_GCOV
-export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE
+export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE KBUILD_MODFLAGS

# When compiling out-of-tree modules, put MODVERDIR in the module
# tree rather than in the kernel tree. The kernel tree might
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 0b9c01a..2d77a2d 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -93,7 +93,7 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
cflags-y += -msoft-float
LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
-MODFLAGS += -mlong-calls
+KBUILD_MODFLAGS += -mlong-calls

cflags-y += -ffreestanding

@@ -185,7 +185,7 @@ cflags-$(CONFIG_CPU_DADDI_WORKAROUNDS) += $(call cc-option,-mno-daddi,)

ifdef CONFIG_CPU_SB1
ifdef CONFIG_SB1_PASS_1_WORKAROUNDS
-MODFLAGS += -msb1-pass1-workarounds
+KBUILD_MODFLAGS += -msb1-pass1-workarounds
endif
endif

diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 30c5f01..16a3ef9 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -24,7 +24,7 @@ CHECKFLAGS += -D__s390__ -msize-long
else
LD_BFD := elf64-s390
LDFLAGS := -m elf64_s390
-MODFLAGS += -fpic -D__PIC__
+KBUILD_MODFLAGS += -fpic -D__PIC__
KBUILD_CFLAGS += -m64
KBUILD_AFLAGS += -m64
UTS_MACHINE := s390x
diff --git a/arch/score/Makefile b/arch/score/Makefile
index 68e0cd0..c667f1d 100644
--- a/arch/score/Makefile
+++ b/arch/score/Makefile
@@ -20,7 +20,7 @@ cflags-y += -G0 -pipe -mel -mnhwloop -D__SCOREEL__ \
#
KBUILD_AFLAGS += $(cflags-y)
KBUILD_CFLAGS += $(cflags-y)
-MODFLAGS += -mlong-calls
+KBUILD_MODFLAGS += -mlong-calls
LDFLAGS += --oformat elf32-littlescore
LDFLAGS_vmlinux += -G0 -static -nostdlib

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 390aae4..2818802 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -115,7 +115,10 @@ endif
# ---------------------------------------------------------------------------

# Default is built-in, unless we know otherwise
-modkern_cflags = $(if $(part-of-module), $(CFLAGS_MODULE), $(CFLAGS_KERNEL))
+modkern_cflags = \
+ $(if $(part-of-module), \
+ $(KBUILD_MODFLAGS) $(CFLAGS_MODULE), \
+ $(CFLAGS_KERNEL))
quiet_modtag := $(empty) $(empty)

$(real-objs-m) : part-of-module := y
@@ -250,8 +253,8 @@ $(obj)/%.lst: $(src)/%.c FORCE

modkern_aflags := $(AFLAGS_KERNEL)

-$(real-objs-m) : modkern_aflags := $(AFLAGS_MODULE)
-$(real-objs-m:.o=.s): modkern_aflags := $(AFLAGS_MODULE)
+$(real-objs-m) : modkern_aflags := $(KBUILD_MODFLAGS) $(AFLAGS_MODULE)
+$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_MODFLAGS) $(AFLAGS_MODULE)

quiet_cmd_as_s_S = CPP $(quiet_modtag) $@
cmd_as_s_S = $(CPP) $(a_flags) -o $@ $<
--
1.6.0.6


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