u-boot/arch/sparc/config.mk

#
# (C) Copyright 2015
# Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.
#
# SPDX-License-Identifier:	GPL-2.0+
#

ifeq ($(CROSS_COMPILE),)
CROSS_COMPILE := sparc-linux-
endif

# This GCC compiler is known to work:
#  https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/4.9.0/

gcclibdir := $(shell dirname `$(CC) -print-libgcc-file-name`)

CONFIG_STANDALONE_LOAD_ADDR ?= 0x00000000 -L $(gcclibdir) \
			       -T $(srctree)/examples/standalone/sparc.lds

cpuflags-$(CONFIG_LEON2) := -mcpu=leon
cpuflags-$(CONFIG_LEON3) := -mcpu=leon3

PLATFORM_CPPFLAGS += $(cpuflags-y)

PLATFORM_RELFLAGS += -fPIC
SPARC: Added generic support for SPARC architecture. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> 16 years ago			`#`
sparc: Add -mcpu= compiler flags for LEON2/LEON3 Signed-off-by: Francois Retief <fgretief@spaceteq.co.za> 9 years ago			`# (C) Copyright 2015`
			`# Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com.`
SPARC: Added generic support for SPARC architecture. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> 16 years ago			`#`
Add GPL-2.0+ SPDX-License-Identifier to source files Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com> 11 years ago			`# SPDX-License-Identifier: GPL-2.0+`
SPARC: Added generic support for SPARC architecture. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> 16 years ago			`#`

kbuild: fix CROSS_COMPILE settings in config.mk The syntax CROSS_COMIPLE ?= <cross_compiler_prefix> does not work because config.mk is parsed after exporting CROSS_COMPILE. Like Linux Kernel's arch/$(ARCH)/Makefile, we must write as follows: ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := <cross_compiler_prefix> endif Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> 10 years ago			`ifeq ($(CROSS_COMPILE),)`
sparc: Add -mcpu= compiler flags for LEON2/LEON3 Signed-off-by: Francois Retief <fgretief@spaceteq.co.za> 9 years ago			`CROSS_COMPILE := sparc-linux-`
kbuild: fix CROSS_COMPILE settings in config.mk The syntax CROSS_COMIPLE ?= <cross_compiler_prefix> does not work because config.mk is parsed after exporting CROSS_COMPILE. Like Linux Kernel's arch/$(ARCH)/Makefile, we must write as follows: ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := <cross_compiler_prefix> endif Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> 10 years ago			`endif`
push CROSS_COMPILE out to $(ARCH)_config.mk Each arch should handle setting a proper default CROSS_COMPILE value in their own config.mk file rather than having to maintain a large ugly list in the Makefile. By using conditional assignment, we don't have to worry about the variable already being set (env/cmdline/etc...). The common config.mk file takes care of exporting CROSS_COMPILE already, and while a few variables (toolchain ones) utilize CROSS_COMPILE before including the arch config.mk, they do so with deferred assignment. Signed-off-by: Mike Frysinger <vapier@gentoo.org> 15 years ago
sparc: Add -mcpu= compiler flags for LEON2/LEON3 Signed-off-by: Francois Retief <fgretief@spaceteq.co.za> 9 years ago			`# This GCC compiler is known to work:`
			`# https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/4.9.0/`

kbuild: improve Kbuild speed Kbuild brought about many advantages for us but a significant performance regression was reported by Simon Glass. After some discussions and analysis, it turned out its main cause is in $(call cc-option,...). Historically, U-Boot parses all config.mk (arch//config.mk and board//config.mk) every time descending into subdirectories. That means cc-options are evaluated over and over again. $(call cc-option,...) is useful but costly. So we want to evaluate them only in ./Makefile and spl/Makefile and export compiler flags. This commit changes the build system as follows: - Modify scripts/Makefile.build to not include config.mk Instead, add $(PLATFORM_CPPFLAGS) to asflags-y, ccflags-y, cppflags-y. - Export many variables Going forward, Kbuild will not parse config.mk files when it descends into subdirectories. If we want to set variables in config.mk and use them in subdirectories, they must be exported. This is the list of variables to get exported: PLATFORM_CPPFLAGS CPUDIR BOARDDIR OBJCOPYFLAGS LDFLAGS LDFLAGS_FINAL (used in nand_spl/board///Makefile) CONFIG_STANDALONE_LOAD_ADDR (used in examples/standalone/Makefile) SYM_PREFIX (used in examples/standalone/Makefile) RELFLAGS (used in examples/standalone/Makefile) - Delete CPPFLAGS This variable has been replaced with PLATFORM_CPPFLAGS - Copy gcclibdir from example/standalone/Makefile to arch/sparc/config.mk The reference in CONFIG_STANDALONE_LOAD_ADDR must be resolved before it is exported. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Reported-by: Simon Glass <sjg@chromium.org> Acked-by: Simon Glass <sjg@chromium.org> Tested-by: Simon Glass <sjg@chromium.org> [on Sandbox] Tested-by: Stephen Warren <swarren@nvidia.com> [on Tegra] 10 years ago			gcclibdir := $(shell dirname `$(CC) -print-libgcc-file-name`)

kbuild: change out-of-tree build This commit changes the working directory where the build process occurs. Before this commit, build process occurred under the source tree for both in-tree and out-of-tree build. That's why we needed to add $(obj) prefix to all generated files in makefiles like follows: $(obj)u-boot.bin: $(obj)u-boot Here, $(obj) is empty for in-tree build, whereas it points to the output directory for out-of-tree build. And our old build system changes the current working directory with "make -C <sub-dir>" syntax when descending into the sub-directories. On the other hand, Kbuild uses a different idea to handle out-of-tree build and directory descending. The build process of Kbuild always occurs under the output tree. When "O=dir/to/store/output/files" is given, the build system changes the current working directory to that directory and restarts the make. Kbuild uses "make -f $(srctree)/scripts/Makefile.build obj=<sub-dir>" syntax for descending into sub-directories. (We can write it like "make $(obj)=<sub-dir>" with a shorthand.) This means the current working directory is always the top of the output directory. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Tested-by: Gerhard Sittig <gsi@denx.de> 10 years ago			`CONFIG_STANDALONE_LOAD_ADDR ?= 0x00000000 -L $(gcclibdir) \`
config.mk: specify the exact path to standalone linker script We want to change the build system to include config.mk only from ./Makefile and spl/Makefile. We must prepare for that in this commit. $(src) is a moving target and not handy for our purpose. We must replace it with a fixed path. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> 10 years ago			`-T $(srctree)/examples/standalone/sparc.lds`
push LOAD_ADDR out to arch mk files Rather than maintain/extend the current ifeq($(ARCH)) mess that exists in the standalone Makefile, push the setting up of LOAD_ADDR out to the arch config.mk (and rename to STANDALONE_LOAD_ADDR in the process). This keeps the common code clean and lets the arch do whatever crazy crap it wants in its own area. Signed-off-by: Mike Frysinger <vapier@gentoo.org> 15 years ago
sparc: Add -mcpu= compiler flags for LEON2/LEON3 Signed-off-by: Francois Retief <fgretief@spaceteq.co.za> 9 years ago			`cpuflags-$(CONFIG_LEON2) := -mcpu=leon`
			`cpuflags-$(CONFIG_LEON3) := -mcpu=leon3`

			`PLATFORM_CPPFLAGS += $(cpuflags-y)`
sparc: merge arch/sparc/cpu/*/config.mk to arch/sparc/config.mk Remove arch/sparc/cpu/{leon2,leon3}/config.mk and move duplicated defines of -fPIC to arch/sparc/config.mk. Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Daniel Hellstrom <daniel@gaisler.com> 10 years ago
			`PLATFORM_RELFLAGS += -fPIC`