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authorMasahiro Yamada <yamada.m@jp.panasonic.com>2014-02-04 17:24:15 +0900
committerTom Rini <trini@ti.com>2014-02-19 11:07:50 -0500
commitf6322eb7af6a0fafe44f30577c828e175e6c662e (patch)
treee83c811ce29ef306ba9f3e6f84ca21136c749b28 /config.mk
parent5651ccffa4aa8ac36961f376927df253b7d0c035 (diff)
downloadu-boot-f6322eb7af6a0fafe44f30577c828e175e6c662e.tar.gz
Makefile: move some variable definitions to the top Makefile
This commit moves some variable definitions from config.mk to the top Makefile: - HOSTCC, HOSTCFLAGS, HOSTLDFLAGS - AS, LD, CC, CPP, etc. - SHELL (renamed to CONFIG_SHELL) I'd like to slim down config.mk file because it is included from all recursive make. It is redundant to re-define the variables every time descending into sub directories. We should rather define them at the top Makefile and export them. U-Boot makefiles has been used "SHELL" variable to store shell chosen for the user, whereas Linux Kernel uses "CONFIG_SHELL". We should never use "SHELL" variable because it is a special variable for GNU Make. Changing SHELL may cause unpredictable side effects whose root cause is usually difficult to find. We should use a generic variable name "CONFIG_SHELL". We should not use the syntax as follows either: rm -f $(obj)tools/env/{fw_printenv,fw_setenv} This depends on "bash" although GNU Make generally invokes "sh" to run the each rule. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Diffstat (limited to 'config.mk')
-rw-r--r--config.mk78
1 files changed, 3 insertions, 75 deletions
diff --git a/config.mk b/config.mk
index b08be7a858..74617d33b7 100644
--- a/config.mk
+++ b/config.mk
@@ -6,13 +6,6 @@
#
#########################################################################
-# Set shell to bash if possible, otherwise fall back to sh
-SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \
- else if [ -x /bin/bash ]; then echo /bin/bash; \
- else echo sh; fi; fi)
-
-export SHELL
-
ifeq ($(CURDIR),$(SRCTREE))
dir :=
else
@@ -55,44 +48,6 @@ PLATFORM_CPPFLAGS =
PLATFORM_LDFLAGS =
#########################################################################
-
-HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \
- $(HOSTCPPFLAGS)
-
-#
-# Mac OS X / Darwin's C preprocessor is Apple specific. It
-# generates numerous errors and warnings. We want to bypass it
-# and use GNU C's cpp. To do this we pass the -traditional-cpp
-# option to the compiler. Note that the -traditional-cpp flag
-# DOES NOT have the same semantics as GNU C's flag, all it does
-# is invoke the GNU preprocessor in stock ANSI/ISO C fashion.
-#
-# Apple's linker is similar, thanks to the new 2 stage linking
-# multiple symbol definitions are treated as errors, hence the
-# -multiply_defined suppress option to turn off this error.
-#
-
-ifeq ($(HOSTOS),darwin)
-# get major and minor product version (e.g. '10' and '6' for Snow Leopard)
-DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.')
-DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.')
-
-os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \
- $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;)
-
-# Snow Leopards build environment has no longer restrictions as described above
-HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc")
-HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp")
-HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress")
-else
-HOSTCC = gcc
-endif
-
-ifeq ($(HOSTOS),cygwin)
-HOSTCFLAGS += -ansi
-endif
-
-#########################################################################
#
# Option checker, gcc version (courtesy linux kernel) to ensure
# only supported compiler options are used
@@ -117,30 +72,9 @@ endif
# cc-version
# Usage gcc-ver := $(call cc-version)
-cc-version = $(shell $(SHELL) $(SRCTREE)/scripts/gcc-version.sh $(CC))
-binutils-version = $(shell $(SHELL) $(SRCTREE)/scripts/binutils-version.sh $(AS))
-dtc-version = $(shell $(SHELL) $(SRCTREE)/scripts/dtc-version.sh $(DTC))
-
-#
-# Include the make variables (CC, etc...)
-#
-AS = $(CROSS_COMPILE)as
-
-# Always use GNU ld
-LD = $(shell if $(CROSS_COMPILE)ld.bfd -v > /dev/null 2>&1; \
- then echo "$(CROSS_COMPILE)ld.bfd"; else echo "$(CROSS_COMPILE)ld"; fi;)
-
-CC = $(CROSS_COMPILE)gcc
-CPP = $(CC) -E
-AR = $(CROSS_COMPILE)ar
-NM = $(CROSS_COMPILE)nm
-LDR = $(CROSS_COMPILE)ldr
-STRIP = $(CROSS_COMPILE)strip
-OBJCOPY = $(CROSS_COMPILE)objcopy
-OBJDUMP = $(CROSS_COMPILE)objdump
-RANLIB = $(CROSS_COMPILE)RANLIB
-DTC = dtc
-CHECK = sparse
+cc-version = $(shell $(CONFIG_SHELL) $(SRCTREE)/scripts/gcc-version.sh $(CC))
+binutils-version = $(shell $(CONFIG_SHELL) $(SRCTREE)/scripts/binutils-version.sh $(AS))
+dtc-version = $(shell $(CONFIG_SHELL) $(SRCTREE)/scripts/dtc-version.sh $(DTC))
#########################################################################
@@ -286,10 +220,6 @@ ifneq ($(CONFIG_SPL_TEXT_BASE),)
LDFLAGS_$(SPL_BIN) += -Ttext $(CONFIG_SPL_TEXT_BASE)
endif
-# Linus' kernel sanity checking tool
-CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
- -Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
-
# Location of a usable BFD library, where we define "usable" as
# "built for ${HOST}, supports ${TARGET}". Sensible values are
# - When cross-compiling: the root of the cross-environment
@@ -315,6 +245,4 @@ endif
#########################################################################
-export HOSTCC HOSTCFLAGS HOSTLDFLAGS CROSS_COMPILE \
- AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE
export CONFIG_SYS_TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS