From: Masahiro Yamada <yamada.masahiro@socionext.com>
To: linux-kbuild@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Sam Ravnborg <sam@ravnborg.org>,
Ulf Magnusson <ulfalizer@gmail.com>,
Nicholas Piggin <npiggin@gmail.com>,
Kees Cook <keescook@chromium.org>,
Emese Revfy <re.emese@gmail.com>,
x86@kernel.org, Masahiro Yamada <yamada.masahiro@socionext.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 00/30] kconfig: move compiler capability tests to Kconfig
Date: Fri, 13 Apr 2018 14:06:09 +0900 [thread overview]
Message-ID: <1523595999-27433-1-git-send-email-yamada.masahiro@socionext.com> (raw)
[Introduction]
The motivation of this work is to move the compiler option tests to
Kconfig from Makefile. A number of kernel features require the
compiler support. Enabling such features blindly in Kconfig ends up
with a lot of nasty build-time testing in Makefiles. If a chosen
feature turns out unsupported by the compiler, what the build system
can do is either to disable it (silently!) or to forcibly break the
build, despite Kconfig has let the user to enable it.
[Major Changes in V3]
This version looks more like Make.
- Use = operator instead of 'macro' keyword
to define a user-defined function.
- 'Recursively expanded variable' is implemented as a side-effect.
A variable is a function with zero argument.
- Support simply expanded variable which is defined by := operator
- Support += operator.
Probably, this feature will be useful to accumulate compiler flags.
At least, Clang needs some prerequisite flags such as triplet
to test other compiler flags.
- Support $(info ...) and $(warning ...) built-in functions,
which were useful while I was debugging this.
- Add documentation
- Add unit tests
- Collect helpers to scripts/Kconfig.include
[TODO items]
I have not been able to finish this. Maybe aiming for v4.18-rc1.
- The text expansion should be able to defer argument expansion.
This is necessary if we want to implement $(if ...) built-in function.
- Error out recursive expansion of itself.
For example,
X = $(X)
refers itself.
If referenced, the expansion continues eternally. This must be terminated.
- More compatible behavior?
Kconfig works mostly like Make, but there are naive cases
where the behavior is different.
[Old Versions]
V2: https://lkml.org/lkml/2018/2/16/610
V1: https://lkml.org/lkml/2018/2/16/610
RFC: https://lkml.org/lkml/2018/2/8/429
Masahiro Yamada (30):
gcc-plugins: fix build condition of SANCOV plugin
kbuild: remove kbuild cache
kbuild: remove CONFIG_CROSS_COMPILE support
kconfig: reference environment variables directly and remove 'option
env='
kconfig: remove string expansion in file_lookup()
kconfig: remove string expansion for mainmenu after yyparse()
kconfig: remove sym_expand_string_value()
kconfig: add built-in function support
kconfig: add 'shell' built-in function
kconfig: replace $(UNAME_RELEASE) with function call
kconfig: begin PARAM state only when seeing a command keyword
kconfig: support variable and user-defined function
kconfig: support simply expanded variable
kconfig: support append assignment operator
kconfig: expand lefthand side of assignment statement
kconfig: add 'info' and 'warning' built-in functions
Documentation: kconfig: document a new Kconfig macro language
kconfig: test: test text expansion
kconfig: show compiler version text in the top comment
kconfig: add basic helper macros to scripts/Kconfig.include
stack-protector: test compiler capability in Kconfig and drop AUTO
mode
kconfig: add CC_IS_GCC and GCC_VERSION
kconfig: add CC_IS_CLANG and CLANG_VERSION
gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT
kcov: test compiler capability in Kconfig and correct dependency
gcc-plugins: move GCC version check for PowerPC to Kconfig
gcc-plugins: test plugin support in Kconfig and clean up Makefile
gcc-plugins: allow to enable GCC_PLUGINS for COMPILE_TEST
arm64: move GCC version check for ARCH_SUPPORTS_INT128 to Kconfig
kbuild: test dead code/data elimination support in Kconfig
Documentation/kbuild/kconfig-language.txt | 8 -
Documentation/kbuild/kconfig-macro-language.txt | 179 +++++++
Kconfig | 10 +-
MAINTAINERS | 3 +-
Makefile | 113 +---
arch/Kconfig | 53 +-
arch/arm64/Kconfig | 1 +
arch/arm64/Makefile | 2 -
arch/powerpc/Kconfig | 2 +-
arch/sh/Kconfig | 4 +-
arch/sparc/Kconfig | 4 +-
arch/um/Kconfig.common | 4 -
arch/x86/Kconfig | 15 +-
arch/x86/um/Kconfig | 6 +-
init/Kconfig | 40 +-
kernel/gcov/Kconfig | 17 +-
kernel/gcov/Makefile | 2 -
lib/Kconfig.debug | 11 +-
scripts/Kbuild.include | 101 +---
scripts/Kconfig.include | 20 +
scripts/Makefile.gcc-plugins | 91 +---
scripts/Makefile.kcov | 10 +-
scripts/clang-version.sh | 18 +-
scripts/gcc-plugins/Makefile | 1 +
scripts/gcc-x86_32-has-stack-protector.sh | 7 +-
scripts/gcc-x86_64-has-stack-protector.sh | 5 -
scripts/kconfig/confdata.c | 31 +-
scripts/kconfig/kconf_id.c | 1 -
scripts/kconfig/lkc.h | 4 -
scripts/kconfig/lkc_proto.h | 15 +-
scripts/kconfig/menu.c | 3 -
scripts/kconfig/preprocess.c | 594 +++++++++++++++++++++
scripts/kconfig/symbol.c | 109 ----
.../kconfig/tests/preprocess/builtin_func/Kconfig | 19 +
.../tests/preprocess/builtin_func/__init__.py | 8 +
.../tests/preprocess/builtin_func/expected_stderr | 4 +
.../tests/preprocess/builtin_func/expected_stdout | 1 +
scripts/kconfig/tests/preprocess/escape/Kconfig | 49 ++
.../kconfig/tests/preprocess/escape/__init__.py | 9 +
.../tests/preprocess/escape/expected_stderr | 10 +
scripts/kconfig/tests/preprocess/user_func/Kconfig | 19 +
.../kconfig/tests/preprocess/user_func/__init__.py | 7 +
.../tests/preprocess/user_func/expected_stderr | 5 +
scripts/kconfig/tests/preprocess/variable/Kconfig | 39 ++
.../kconfig/tests/preprocess/variable/__init__.py | 7 +
.../tests/preprocess/variable/expected_stderr | 7 +
scripts/kconfig/util.c | 22 +-
scripts/kconfig/zconf.l | 95 +++-
scripts/kconfig/zconf.y | 48 +-
49 files changed, 1259 insertions(+), 574 deletions(-)
create mode 100644 Documentation/kbuild/kconfig-macro-language.txt
create mode 100644 scripts/Kconfig.include
create mode 100644 scripts/kconfig/preprocess.c
create mode 100644 scripts/kconfig/tests/preprocess/builtin_func/Kconfig
create mode 100644 scripts/kconfig/tests/preprocess/builtin_func/__init__.py
create mode 100644 scripts/kconfig/tests/preprocess/builtin_func/expected_stderr
create mode 100644 scripts/kconfig/tests/preprocess/builtin_func/expected_stdout
create mode 100644 scripts/kconfig/tests/preprocess/escape/Kconfig
create mode 100644 scripts/kconfig/tests/preprocess/escape/__init__.py
create mode 100644 scripts/kconfig/tests/preprocess/escape/expected_stderr
create mode 100644 scripts/kconfig/tests/preprocess/user_func/Kconfig
create mode 100644 scripts/kconfig/tests/preprocess/user_func/__init__.py
create mode 100644 scripts/kconfig/tests/preprocess/user_func/expected_stderr
create mode 100644 scripts/kconfig/tests/preprocess/variable/Kconfig
create mode 100644 scripts/kconfig/tests/preprocess/variable/__init__.py
create mode 100644 scripts/kconfig/tests/preprocess/variable/expected_stderr
--
2.7.4
next reply other threads:[~2018-04-13 5:14 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-13 5:06 Masahiro Yamada [this message]
2018-04-13 5:06 ` [PATCH 01/30] gcc-plugins: fix build condition of SANCOV plugin Masahiro Yamada
2018-05-04 14:21 ` Masahiro Yamada
2018-05-04 16:21 ` Kees Cook
2018-05-05 1:35 ` Masahiro Yamada
2018-04-13 5:06 ` [PATCH 02/30] kbuild: remove kbuild cache Masahiro Yamada
2018-04-13 5:06 ` [PATCH 03/30] kbuild: remove CONFIG_CROSS_COMPILE support Masahiro Yamada
2018-04-13 5:06 ` [PATCH 04/30] kconfig: reference environment variables directly and remove 'option env=' Masahiro Yamada
2018-04-13 5:06 ` [PATCH 05/30] kconfig: remove string expansion in file_lookup() Masahiro Yamada
2018-04-13 5:06 ` [PATCH 06/30] kconfig: remove string expansion for mainmenu after yyparse() Masahiro Yamada
2018-04-13 5:06 ` [PATCH 07/30] kconfig: remove sym_expand_string_value() Masahiro Yamada
2018-04-13 5:06 ` [PATCH 08/30] kconfig: add built-in function support Masahiro Yamada
2018-04-15 7:57 ` Ulf Magnusson
2018-04-15 15:12 ` Masahiro Yamada
2018-04-13 5:06 ` [PATCH 09/30] kconfig: add 'shell' built-in function Masahiro Yamada
2018-04-13 5:06 ` [PATCH 10/30] kconfig: replace $(UNAME_RELEASE) with function call Masahiro Yamada
2018-04-13 5:06 ` [PATCH 11/30] kconfig: begin PARAM state only when seeing a command keyword Masahiro Yamada
2018-04-13 5:06 ` [PATCH 12/30] kconfig: support variable and user-defined function Masahiro Yamada
2018-04-13 5:06 ` [PATCH 13/30] kconfig: support simply expanded variable Masahiro Yamada
2018-04-13 5:06 ` [PATCH 14/30] kconfig: support append assignment operator Masahiro Yamada
2018-04-13 5:06 ` [PATCH 15/30] kconfig: expand lefthand side of assignment statement Masahiro Yamada
2018-04-13 5:06 ` [PATCH 16/30] kconfig: add 'info' and 'warning' built-in functions Masahiro Yamada
2018-04-13 5:06 ` [PATCH 17/30] Documentation: kconfig: document a new Kconfig macro language Masahiro Yamada
2018-04-14 23:33 ` Randy Dunlap
2018-04-17 15:05 ` Masahiro Yamada
2018-04-15 8:08 ` Ulf Magnusson
2018-04-17 15:07 ` Masahiro Yamada
2018-04-18 8:33 ` Ulf Magnusson
2018-04-13 5:06 ` [PATCH 18/30] kconfig: test: test text expansion Masahiro Yamada
2018-04-13 5:06 ` [PATCH 19/30] kconfig: show compiler version text in the top comment Masahiro Yamada
2018-04-13 5:06 ` [PATCH 20/30] kconfig: add basic helper macros to scripts/Kconfig.include Masahiro Yamada
2018-04-15 7:41 ` Ulf Magnusson
2018-04-15 15:02 ` Masahiro Yamada
2018-04-13 5:06 ` [PATCH 21/30] stack-protector: test compiler capability in Kconfig and drop AUTO mode Masahiro Yamada
2018-04-13 16:41 ` Kees Cook
2018-04-13 18:11 ` Linus Torvalds
2018-04-13 20:41 ` Kees Cook
2018-04-15 13:28 ` Masahiro Yamada
2018-04-15 16:04 ` Kees Cook
2018-04-15 9:40 ` Masahiro Yamada
2018-04-13 5:06 ` [PATCH 22/30] kconfig: add CC_IS_GCC and GCC_VERSION Masahiro Yamada
2018-04-13 5:06 ` [PATCH 23/30] kconfig: add CC_IS_CLANG and CLANG_VERSION Masahiro Yamada
2018-04-13 5:06 ` [PATCH 24/30] gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT Masahiro Yamada
2018-04-13 5:06 ` [PATCH 25/30] kcov: test compiler capability in Kconfig and correct dependency Masahiro Yamada
2018-04-13 5:06 ` [PATCH 26/30] gcc-plugins: move GCC version check for PowerPC to Kconfig Masahiro Yamada
2018-04-13 5:06 ` [PATCH 27/30] gcc-plugins: test plugin support in Kconfig and clean up Makefile Masahiro Yamada
2018-04-13 5:06 ` [PATCH 28/30] gcc-plugins: allow to enable GCC_PLUGINS for COMPILE_TEST Masahiro Yamada
2018-04-13 5:06 ` [PATCH 29/30] arm64: move GCC version check for ARCH_SUPPORTS_INT128 to Kconfig Masahiro Yamada
2018-04-13 5:06 ` [PATCH 30/30] kbuild: test dead code/data elimination support in Kconfig Masahiro Yamada
2018-04-13 5:17 ` [PATCH 00/30] kconfig: move compiler capability tests to Kconfig Masahiro Yamada
2018-04-13 5:52 ` Kees Cook
2018-04-13 12:21 ` Masahiro Yamada
2018-04-13 13:55 ` Masahiro Yamada
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