kbuild: prefix compiler flag variables with KBUILD_

In old days, Linux also used to use well-known variables such CFLAGS,
CPPFLAGS, etc.

They were prefixed with KBUILD_ presumably for preventing users from
overriding them accidentally.

Rename as follows:
  CFLAGS          ->  KBUILD_CFLAGS
  AFLAGS          ->  KBUILD_AFLAGS
  CPPFLAGS        ->  KBUILD_CPPFLAGS
  LDFLAGS         ->  KBUILD_LDFLAGS
  HOSTCFLAGS      ->  KBUILD_HOSTCFLAGS
  HOSTCXXFLAGS    ->  KBUILD_HOSTCXXFLAGS
  HOSTLDFLAGS     ->  KBUILD_HOSTLDFLAGS
  HOST_LOADLIBES  ->  KBUILD_HOSTLDLIBS

HOSTCFLAGS, HOSTCXXFLAGS, HOSTLDFLAGS, HOSTLDLIBS are re-used to allow
users to pass-in additional flags to the host compiler.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

6 files changed, 22 insertions, 22 deletions

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 919f286162..227a022b41 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -97,7 +97,7 @@ try-run = $(shell set -e;		\
 # Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
 
 as-option = $(call try-run,\
-	$(CC) $(CFLAGS) $(1) -c -xassembler /dev/null -o "$$TMP",$(1),$(2))
+	$(CC) $(KBUILD_CFLAGS) $(1) -c -xassembler /dev/null -o "$$TMP",$(1),$(2))
 
 # as-instr
 # Usage: cflags-y += $(call as-instr,instr,option1,option2)
@@ -109,17 +109,17 @@ as-instr = $(call try-run,\
 # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
 
 cc-option = $(call try-run,\
-	$(CC) -Werror $(KBUILD_CPPFLAGS) $(CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",$(1),$(2))
+	$(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",$(1),$(2))
 
 # cc-option-yn
 # Usage: flag := $(call cc-option-yn,-march=winchip-c6)
 cc-option-yn = $(call try-run,\
-	$(CC) -Werror $(KBUILD_CPPFLAGS) $(CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",y,n)
+	$(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -xc /dev/null -o "$$TMP",y,n)
 
 # cc-disable-warning
 # Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
 cc-disable-warning = $(call try-run,\
-	$(CC) -Werror $(KBUILD_CPPFLAGS) $(CFLAGS) -W$(strip $(1)) -c -xc /dev/null -o "$$TMP",-Wno-$(strip $(1)))
+	$(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -xc /dev/null -o "$$TMP",-Wno-$(strip $(1)))
 
 # cc-version
 # Usage gcc-ver := $(call cc-version)
@@ -130,7 +130,7 @@ cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh $(CC))
 cc-ifversion = $(shell [ $(call cc-version, $(CC)) $(1) $(2) ] && echo $(3))
 
 # ld-option
-# Usage: LDFLAGS += $(call ld-option, -X)
+# Usage: KBUILD_LDFLAGS += $(call ld-option, -X)
 ld-option = $(call try-run,\
 	$(CC) -x c /dev/null -c -o "$$TMPO" ; $(LD) $(1) "$$TMPO" -o "$$TMP",$(1),$(2))
 
diff --git a/scripts/Makefile b/scripts/Makefile
index eb6718fadf..f3b9aece9e 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -26,7 +26,7 @@ hostprogs-$(CONFIG_ARCH_SOCFPGA) += socfpga_mkimage
 hostprogs-$(CONFIG_MXS_HOSTTOOLS)+= mxsimage mxsboot
 hostprogs-$(CONFIG_ARCH_LAYERSCAPE) += pblimage
 hostprogs-$(CONFIG_ARCH_STM32MP) += stm32image
-HOSTCFLAGS += -I$(srctree)/scripts/include/
+KBUILD_HOSTCFLAGS += -I$(srctree)/scripts/include/
 HOSTLDLIBS_mxsimage  = `pkg-config --libs openssl`
 HOSTCFLAGS_omap3-usb-loader.o = `pkg-config --cflags libusb-1.0`
 HOSTLDLIBS_omap3-usb-loader  = `pkg-config --libs libusb-1.0`
@@ -50,7 +50,7 @@ targetprogs-$(CONFIG_IMD_TARGET) += bareboximd-target
 subdir-	+= basic kconfig setupmbr
 
 quiet_cmd_csingle	= CC      $@
-      cmd_csingle	= $(CC) -Wp,-MD,$(depfile) $(TARGETCFLAGS) $(CFLAGS) -o $@ $<
+      cmd_csingle	= $(CC) -Wp,-MD,$(depfile) $(TARGETCFLAGS) $(KBUILD_CFLAGS) -o $@ $<
 
 __targetprogs	:= $(sort $(targetprogs-y) $(targetprogs-m))
 target-csingle	:= $(foreach m,$(__targetprogs),$(if $($(m)-objs),,$(m)))
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index a6ed83e6d2..601a4d9cd7 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -178,7 +178,7 @@ cmd_modversions =							\
 			      -T $(@D)/$(@F:.o=.symtypes)) -a $(ARCH)	\
 		> $(@D)/.tmp_$(@F:.o=.ver);				\
 									\
-		$(LD) $(LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) 		\
+		$(LD) $(KBUILD_LDFLAGS) -r -o $@ $(@D)/.tmp_$(@F) 		\
 			-T $(@D)/.tmp_$(@F:.o=.ver);			\
 		rm -f $(@D)/.tmp_$(@F) $(@D)/.tmp_$(@F:.o=.ver);	\
 	else								\
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index 8f4d62f22e..9740f3106b 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -81,9 +81,9 @@ obj-dirs += $(host-objdirs)
 #####
 # Handle options to gcc. Support building with separate output directory
 
-_hostc_flags   = $(HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
+_hostc_flags   = $(KBUILD_HOSTCFLAGS)   $(HOST_EXTRACFLAGS)   \
                  $(HOSTCFLAGS_$(target-stem).o)
-_hostcxx_flags = $(HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
+_hostcxx_flags = $(KBUILD_HOSTCXXFLAGS) $(HOST_EXTRACXXFLAGS) \
                  $(HOSTCXXFLAGS_$(target-stem).o)
 
 ifeq ($(KBUILD_SRC),)
@@ -103,15 +103,15 @@ hostcxx_flags  = -Wp,-MD,$(depfile) $(__hostcxx_flags)
 # Create executable from a single .c file
 # host-csingle -> Executable
 quiet_cmd_host-csingle 	= HOSTCC  $@
-      cmd_host-csingle	= $(HOSTCC) $(hostc_flags) $(HOSTLDFLAGS) -o $@ $< \
-		$(HOST_LOADLIBES) $(HOSTLDLIBS_$(target-stem))
+      cmd_host-csingle	= $(HOSTCC) $(hostc_flags) $(KBUILD_HOSTLDFLAGS) -o $@ $< \
+		$(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
 $(host-csingle): $(obj)/%: $(src)/%.c FORCE
 	$(call if_changed_dep,host-csingle)
 
 # Link an executable based on list of .o files, all plain c
 # host-cmulti -> executable
 quiet_cmd_host-cmulti	= HOSTLD  $@
-      cmd_host-cmulti	= $(HOSTCC) $(HOSTLDFLAGS) -o $@ \
+      cmd_host-cmulti	= $(HOSTCC) $(KBUILD_HOSTLDFLAGS) -o $@ \
 			  $(addprefix $(obj)/, $($(target-stem)-objs)) \
 			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
 $(host-cmulti): FORCE
@@ -128,7 +128,7 @@ $(host-cobjs): $(obj)/%.o: $(src)/%.c FORCE
 # Link an executable based on list of .o files, a mixture of .c and .cc
 # host-cxxmulti -> executable
 quiet_cmd_host-cxxmulti	= HOSTLD  $@
-      cmd_host-cxxmulti	= $(HOSTCXX) $(HOSTLDFLAGS) -o $@ \
+      cmd_host-cxxmulti	= $(HOSTCXX) $(KBUILD_HOSTLDFLAGS) -o $@ \
 			  $(foreach o,objs cxxobjs,\
 			  $(addprefix $(obj)/, $($(target-stem)-$(o)))) \
 			  $(KBUILD_HOSTLDLIBS) $(HOSTLDLIBS_$(target-stem))
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 5a5d6a3a6c..985fc13035 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -132,9 +132,9 @@ basename_flags = -D"KBUILD_BASENAME=KBUILD_STR($(call name-fix,$(basetarget)))"
 modname_flags  = $(if $(filter 1,$(words $(modname))),\
                  -D"KBUILD_MODNAME=KBUILD_STR($(call name-fix,$(modname)))")
 
-_c_flags       = $(CFLAGS) $(ccflags-y) $(CFLAGS_$(target-stem).o)
-_a_flags       = $(AFLAGS) $(asflags-y) $(AFLAGS_$(target-stem).o)
-_cpp_flags     = $(CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds)
+_c_flags       = $(KBUILD_CFLAGS) $(ccflags-y) $(CFLAGS_$(target-stem).o)
+_a_flags       = $(KBUILD_AFLAGS) $(asflags-y) $(AFLAGS_$(target-stem).o)
+_cpp_flags     = $(KBUILD_CPPFLAGS) $(cppflags-y) $(CPPFLAGS_$(target-stem).lds)
 
 ifeq ($(CONFIG_UBSAN),y)
 _CFLAGS_UBSAN   = $(eval _CFLAGS_UBSAN := $(CFLAGS_UBSAN))$(_CFLAGS_UBSAN)
@@ -162,16 +162,16 @@ __a_flags	=                          $(call flags,_a_flags)
 __cpp_flags     =                          $(call flags,_cpp_flags)
 endif
 
-c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(CPPFLAGS) \
+c_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
 		 $(__c_flags) $(modkern_cflags) \
 		 -D"KBUILD_STR(s)=\#s" $(basename_flags) $(modname_flags)
 
-a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(CPPFLAGS) \
+a_flags        = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) \
 		 $(__a_flags) $(modkern_aflags)
 
 cpp_flags      = -Wp,-MD,$(depfile) $(NOSTDINC_FLAGS) $(__cpp_flags)
 
-ld_flags       = $(LDFLAGS) $(ldflags-y)
+ld_flags       = $(KBUILD_LDFLAGS) $(ldflags-y)
 
 dtc_cpp_flags  = -Wp,-MD,$(depfile).pre -nostdinc                        \
 		 -I$(srctree)/arch/$(SRCARCH)/dts/include		 \
@@ -223,7 +223,7 @@ $(obj)/%:: $(src)/%_shipped
 # ---------------------------------------------------------------------------
 
 quiet_cmd_ld = LD      $@
-cmd_ld = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_$(@F)) \
+cmd_ld = $(LD) $(KBUILD_LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_$(@F)) \
 	       $(filter-out FORCE,$^) -o $@
 
 # Objcopy
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 78e6edd925..78e4ed7189 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -97,7 +97,7 @@ targets += $(modules:.ko=.mod.o)
 
 # Step 6), final link of the modules
 quiet_cmd_ld_ko_o = LD [M]  $@
-      cmd_ld_ko_o = $(LD) -r $(LDFLAGS) $(LDFLAGS_MODULE) -o $@		\
+      cmd_ld_ko_o = $(LD) -r $(KBUILD_LDFLAGS) $(LDFLAGS_MODULE) -o $@		\
 			  $(filter-out FORCE,$^)
 
 $(modules): %.ko :%.o %.mod.o FORCE