path: root/scripts/Kbuild.include
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2017-09-23scripts/dtc: Update to upstream version v1.4.3Tom Rini1-5/+0
Using the script from Linux v4.14-rc1 import the portions of dtc that we require. We bring in and scripts/dtc/Makefile from Linux v4.14-rc1. Rework DTC_FLAGS handling to not require a test. Signed-off-by: Tom Rini <>
2017-04-05Makefile: Provide an option to select SPL or TPLSimon Glass1-0/+6
At present we have SPL_ which can be used in Makefiles to select between normal and SPL CONFIGs like this: obj-$(CONFIG_$(SPL_)DM) += core/ When TPL is being built, SPL_ has the value 'SPL' which is generally a good idea since they tend to follow each other. But in extreme situations we may want to distinugish between SPL and TPL. For example we may not want to enable CONFIG_DM with TPL. Add a new SPL_TPL_ variable which is set to either empty (for U-Boot proper), 'SPL' or 'TPL'. This may prove useful with TPL-specific options. Signed-off-by: Simon Glass <>
2017-03-09kbuild: turn of dtc unit address warnings by defaultMasahiro Yamada1-0/+5
DTC 1.4.2 or later checks DT unit-address without reg property and vice-versa, and generates lots of warnings. Fixing DT files will take for a while. Until then, let's turn off the check unless building with W=*. Introduce a new helper dtc-option to check if the option is supported in order to suppress warnings on older versions. Signed-off-by: Masahiro Yamada <> Reviewed-by: Simon Glass <> Tested-by: Bin Meng <>
2016-01-25kbuild: Add clang detectionTom Rini1-0/+4
Adapted from: >From 5631d9c429857194bd55d7bcd8fa5bdd1a9899a3 Mon Sep 17 00:00:00 2001 From: Michal Marek <> Date: Wed, 19 Aug 2015 17:36:41 +0200 Subject: [PATCH 1/1] kbuild: Fix clang detection We cannot detect clang before including the arch Makefile, because that can set the default cross compiler. We also cannot detect clang after including the arch Makefile, because powerpc wants to know about clang. Solve this by using an deferred variable. This costs us a few shell invocations, but this is only a constant number. Reported-by: Behan Webster <> Reported-by: Anton Blanchard <> Signed-off-by: Michal Marek <> in the Linux kernel. This will allow us to make better decisions about when to run tests later on for gcc features. Signed-off-by: Tom Rini <>
2015-08-18kbuild: add a makefile macro useful with per-image config optionsMasahiro Yamada1-0/+6
Commit e02ee2548afe ("kconfig: switch to single .config configuration") made the configuration itself pretty simple, instead, we lost the way to systematically enable/disable config options for each image independently. Our current strategy is, put entries into Makefile.spl for options we need separate enabling, or once enable the options globally in Kconfig and then undef them in Makefile.uncmd_spl if we do not want to compile the features for SPL at all. Things are getting really messy. Besides, "ifdef CONFIG_SPL_BUILD" are sprinkled everywhere in makefiles. This commit adds a variable to help describe makefile simpler. $(SPL_) evaluates to "SPL_" during the SPL build, while to an empty string during building U-boot proper. So, you can write obj-$(CONFIG_$(SPL_)FOO) += foo.o instead of ifdef CONFIG_SPL_BUILD obj-$(CONFIG_SPL_FOO) += foo.o else obj-$(CONFIG_FOO) += foo.o endif If CONFIG_SPL_FOO does not exist in Kconfig, it is equivalent to ifndef CONFIG_SPL_BUILD obj-$(CONFIG_SPL_FOO) += foo.o endif This is the pattern we often see in our current makefiles. To take advantage of this macro, we should prefix SPL_ for the SPL version of the option when we need independent control between U-boot and SPL. With this naming scheme, I hope our makefiles will be much simplified. It means we want to rename existing config options as follows in the long run: CONFIG_SPL_SERIAL_SUPPORT -> CONFIG_SPL_SERIAL CONFIG_SPL_I2C_SUPPORT -> CONFIG_SPL_I2C CONFIG_SPL_GPIO_SUPPORT -> CONFIG_SPL_GPIO CONFIG_SPL_SPI_SUPPORT -> CONFIG_SPL_SPI CONFIG_SPL_DISABLE_OF_CONTROL -> CONFIG_SPL_OF_CONTROL (inverting the logic) Then drivers/Makefile would be re-worked as follows: obj-$(CONFIG_$(SPL_)SERIAL) += serial/ obj-$(CONFIG_$(SPL_)I2C) += i2c/ obj-$(CONFIG_$(SPL_)GPIO) += gpio/ obj-$(CONFIG_$(SPL_)SPI) += spi/ ... Eventually, SPL-specialized entries in Makefile.spl would go away. Signed-off-by: Masahiro Yamada <> Reviewed-by: Tom Rini <> Reviewed-by: Simon Glass <>
2015-07-27kbuild: sync with Linux 4.1Masahiro Yamada1-5/+20
Update some build scripts to match Linux 4.1. Commit-based syncing was done so as not to break U-Boot specific changes. The previous big sync was from Linux 3.18-rc1 by commit 176d09827725 (kbuild: sync misc scripts with Linux 3.18-rc1). The commits imported from Linux (some with adjustments) are: [1] commit 9fb5e5372208973984a23ee6f5f025c05d364633 Author: Robert Richter <> dts, kbuild: Factor out dtbs install rules to Makefile.dtbinst [2] commit 371fdc77af44f4cb32475fd499e1d912ccc30890 Author: Masahiro Yamada <> kbuild: collect shorthands into scripts/Kbuild.include [3] commit a29b82326ed4eb5567b03c85b52c6891578d5a03 Author: Michal Marek <> kbuild: Remove duplicate $(cmd) definition in Makefile.clean [4] commit 1846dfbde3e8a53f3673dcb1c1b79fd9b3f8d40d Author: Masahiro Yamada <> kbuild: remove redundant -rR flag of hdr-inst [5] commit 34948e0bbf98640fc1821751b01d2f0cd17d84d5 Author: Michal Marek <> kbuild: Drop support for clean-rule [6] commit a16c5f99a28c9945165c46da27fff8e6f26f8736 Author: Michal Marek <> kbuild: Fix removal of the debian/ directory [7] commit d0d38cd9e853db11e0242b3df4c9c3c4a663fbb4 Author: Masahiro Yamada <> kbuild: use mixed-targets when two or more config targets are given [8] commit dd33c03b18b3f2db791eb6a17c37d2de66e4de18 Author: Masahiro Yamada <> kbuild: fix cc-ifversion macro [9] commit 665d92e38f65d70796aad2b8e49e42e80815d4a4 Author: Masahiro Yamada <> kbuild: do not add $(call ...) to invoke cc-version or cc-fullversion [10] commit 6dcb4e5edf39e3b65a75ca76f087b2fdbee8a808 Author: Masahiro Yamada <> kbuild: allow cc-ifversion to have the argument for false condition [11] commit c0a80c0c27e5e65b180a25e6c4c2f7ef9e386cd3 Author: Heiko Carstens <> ftrace: allow architectures to specify ftrace compile options [12] commit 0b24becc810dc3be6e3f94103a866f214c282394 Author: Andrey Ryabinin <> kasan: add kernel address sanitizer infrastructure [13] commit 4218affdf57f938c04e3a916a9685ee27079f377 Author: Masahiro Yamada <> kbuild: remove warning about "make depend" [14] commit 77479b38e2f58890eb221a0418357502a5b41cd6 Author: Nathan Rossi <> kbuild: Create directory for target DTB Signed-off-by: Masahiro Yamada <> Signed-off-by: Robert Richter <> Signed-off-by: Heiko Carstens <> Signed-off-by: Martin Schwidefsky <> Signed-off-by: Andrey Ryabinin <> Signed-off-by: Nathan Rossi <> Signed-off-by: Michal Simek <> Signed-off-by: Olof Johansson <> Signed-off-by: Michal Marek <> Signed-off-by: Masahiro Yamada <>
2014-11-07kbuild: sync misc scripts with Linux 3.18-rc1Masahiro Yamada1-8/+10
This commit imports some updates in misc scripts from Linux 3.18-rc1. [1] commit cbb4d3e6510b99522719c5ef0 by Horia Geanta scripts/kernel-doc: handle object-like macros [2] commit 164f0d2efaaef83 by Michal Marek kbuild: Fix handling of backslashes in *.cmd files [3] commit 270a00963cd367214e by Randy Dunlap scripts/kernel-doc: recognize __meminit [4] commit a4954fd7724c0f55361eb5 by Masahiro Yamada kbuild: remove obj-n and lib-n handling [5] commit 5b2389b45d1a9c12b9f by Masahiro Yamada kbuild: simplify build, clean, modbuiltin shorthands Signed-off-by: Horia Geanta <> Signed-off-by: Michal Marek <> Signed-off-by: Randy Dunlap <> Signed-off-by: Masahiro Yamada <>
2014-09-09cc-option: also detect unsupported warnings optionsJeroen Hofstee1-2/+2
By default clang will echo a warning if a warning option is unknown. Turning warnings into errors when polling for options also catches such cases and prevents passing arguments to the compiler which cause warnings. cc: Masahiro Yamada <> cc: Tom Rini <> Signed-off-by: Jeroen Hofstee <>
2014-04-18kbuild: sync with Linux Kernel v3.15-rc1Masahiro Yamada1-0/+10
This commit imports Kbuild-related updates from v3.14 to v3.15-rc1. - commit 3d3d6b8474204b6819688c9800774d52d370a538 kbuild: LLVMLinux: Adapt warnings for compilation with clang - commit 61163efae02040f66a95c8ed17f4407951ba58fa kbuild: LLVMLinux: Add Kbuild support for building kernel with Clang - commit 79192ca8ebd9a25c583aa46024a250fef1e7766f scripts: objdiff: detect object code changes between two commits - commit 1c9e70a55b088d97a59241744fe459409d0c3582 kbuild: create a build directory automatically for out-of-tree build - commit a03fcb50e816a69acffb13b5e56db75063aeba8a kbuild: remove redundant '.*.cmd' pattern from make distclean - commit 13338935f1574a2dcd1c891461b0dcc42f8cff42 kbuild: move "quote" to Kbuild.include to be consistent - commit bfdfaeae500a3b194b73b01e92a8034791a58b7f kbuild: specify build_docproc as a phony target - commit f4d4ffc03efc864645b990e1d579bbe1b8e358a4 kbuild: dtbs_install: new make target - commit 1e64ff42ea3d8d2fc8aa71f9717b3c1cb6c2f893 Kbuild, lto: Disable LTO for asm-offsets.c - commit ccbef1674a1579842c7dbdf554efca85d2cd245a Kbuild, lto: add ld-version and ld-ifversion macros - commit ae63b2d7bdd9bd66b88843be0daf8e37d8f0b574 scripts/ Ignore *.mod.c - commit e36aaea28972c57a32a3ba5365e61633739719b9 kbuild: Fix silent builds with make-4 Signed-off-by: Masahiro Yamada <>
2014-02-19kbuild: Do not generate .*.su files at the top directoryMasahiro Yamada1-1/+3
Without this workaround, you will see a lot of ".*.su" files at the top directory after building with a compiler which supports "-fstack-usage" option. Signed-off-by: Masahiro Yamada <>
2014-02-19kbuild: use Linux Kernel build scriptsMasahiro Yamada1-1/+1
Now we are ready to switch over to real Kbuild. This commit disables temporary scripts: scripts/{,} and enables real Kbuild scripts: scripts/{,,Makefile.lib}. This switch is triggered by the line in scripts/Kbuild.include -build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/ obj +build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/ obj We need to adjust some build scripts for U-Boot. But smaller amount of modification is preferable. Additionally, we need to fix compiler flags which are locally added or removed. In Kbuild, it is not allowed to change CFLAGS locally. Instead, ccflags-y, asflags-y, cppflags-y, CFLAGS_$(basetarget).o, CFLAGS_REMOVE_$(basetarget).o are prepared for that purpose. Signed-off-by: Masahiro Yamada <> Tested-by: Gerhard Sittig <>
2014-02-19Makefile: rename scripts/ to scripts/ Yamada1-1/+1
Some build scripts including scripts/ will be imported from Linux Kernel in the next commit. We need to adjust them for U-Boot in the following commits. To make it easier for reviewers to track the modification, this commit renames scripts/ to scripts/ beforehand. Signed-off-by: Masahiro Yamada <>
2014-02-19kbuild: change out-of-tree buildMasahiro Yamada1-3/+1
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/ 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 <> Tested-by: Gerhard Sittig <>
2014-02-19kbuild: Use Kbuild.includeMasahiro Yamada1-1/+7
This commit adjusts some files to use Kbuild.include. - Use cc-option defined in Kbuild.include (Delete cc-option in - Use cc-version defined in (Delete cc-version in - Move binutils-version and dtc-version to Kbuild.include by analogy to cc-version This commit also adds srctree (same as SRCTREE) to use Kbuild scripts. Signed-off-by: Masahiro Yamada <>
2014-02-19kbuild: import Kbuild.include from linux v3.13 tagMasahiro Yamada1-0/+278
Signed-off-by: Masahiro Yamada <>