diff options
Diffstat (limited to 'init/Kconfig')
| -rw-r--r-- | init/Kconfig | 71 |
1 files changed, 60 insertions, 11 deletions
diff --git a/init/Kconfig b/init/Kconfig index fdb4f52609c6..a46aa8f3174d 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -8,8 +8,25 @@ config DEFCONFIG_LIST default "/boot/config-$(shell,uname -r)" default "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)" +config CC_VERSION_TEXT + string + default "$(CC_VERSION_TEXT)" + help + This is used in unclear ways: + + - Re-run Kconfig when the compiler is updated + The 'default' property references the environment variable, + CC_VERSION_TEXT so it is recorded in include/config/auto.conf.cmd. + When the compiler is updated, Kconfig will be invoked. + + - Ensure full rebuild when the compier is updated + include/linux/kconfig.h contains this option in the comment line so + fixdep adds include/config/cc/version/text.h into the auto-generated + dependency. When the compiler is updated, syncconfig will touch it + and then every file will be rebuilt. + config CC_IS_GCC - def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc) + def_bool $(success,echo "$(CC_VERSION_TEXT)" | grep -q gcc) config GCC_VERSION int @@ -21,7 +38,7 @@ config LD_VERSION default $(shell,$(LD) --version | $(srctree)/scripts/ld-version.sh) config CC_IS_CLANG - def_bool $(success,$(CC) --version | head -n 1 | grep -q clang) + def_bool $(success,echo "$(CC_VERSION_TEXT)" | grep -q clang) config LD_IS_LLD def_bool $(success,$(LD) -v | head -n 1 | grep -q LLD) @@ -31,11 +48,22 @@ config CLANG_VERSION default $(shell,$(srctree)/scripts/clang-version.sh $(CC)) config CC_CAN_LINK - def_bool $(success,$(srctree)/scripts/cc-can-link.sh $(CC)) + bool + default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(m64-flag)) if 64BIT + default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) $(m32-flag)) + +config CC_CAN_LINK_STATIC + bool + default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) -static $(m64-flag)) if 64BIT + default $(success,$(srctree)/scripts/cc-can-link.sh $(CC) -static $(m32-flag)) config CC_HAS_ASM_GOTO def_bool $(success,$(srctree)/scripts/gcc-goto.sh $(CC)) +config CC_HAS_ASM_GOTO_OUTPUT + depends on CC_HAS_ASM_GOTO + def_bool $(success,echo 'int foo(int x) { asm goto ("": "=r"(x) ::: bar); return x; bar: return 0; }' | $(CC) -x c - -c -o /dev/null) + config TOOLS_SUPPORT_RELR def_bool $(success,env "CC=$(CC)" "LD=$(LD)" "NM=$(NM)" "OBJCOPY=$(OBJCOPY)" $(srctree)/scripts/tools-support-relr.sh) @@ -260,6 +288,16 @@ config KERNEL_UNCOMPRESSED endchoice +config DEFAULT_INIT + string "Default init path" + default "" + help + This option determines the default init for the system if no init= + option is passed on the kernel command line. If the requested path is + not present, we will still then move on to attempting further + locations (e.g. /sbin/init, etc). If this is empty, we will just use + the fallback list when init= is not passed. + config DEFAULT_HOSTNAME string "Default hostname" default "(none)" @@ -288,7 +326,7 @@ config SWAP config SYSVIPC bool "System V IPC" - ---help--- + help Inter Process Communication is a suite of library functions and system calls which let processes (running programs) synchronize and exchange information. It is generally considered to be a good thing, @@ -310,7 +348,7 @@ config SYSVIPC_SYSCTL config POSIX_MQUEUE bool "POSIX Message Queues" depends on NET - ---help--- + help POSIX variant of message queues is a part of IPC. In POSIX message queues every message has a priority which decides about succession of receiving it by a process. If you want to compile and run @@ -329,6 +367,18 @@ config POSIX_MQUEUE_SYSCTL depends on SYSCTL default y +config WATCH_QUEUE + bool "General notification queue" + default n + help + + This is a general notification queue for the kernel to pass events to + userspace by splicing them into pipes. It can be used in conjunction + with watches for key/keyring change notifications and device + notifications. + + See Documentation/watch_queue.rst + config CROSS_MEMORY_ATTACH bool "Enable process_vm_readv/writev syscalls" depends on MMU @@ -576,7 +626,7 @@ config BUILD_BIN2C config IKCONFIG tristate "Kernel .config support" - ---help--- + help This option enables the complete Linux kernel ".config" file contents to be saved in the kernel. It provides documentation of which kernel options are used in a running kernel or in an @@ -589,7 +639,7 @@ config IKCONFIG config IKCONFIG_PROC bool "Enable access to .config through /proc/config.gz" depends on IKCONFIG && PROC_FS - ---help--- + help This option enables access to the kernel configuration file through /proc/config.gz. @@ -835,7 +885,7 @@ config BLK_CGROUP bool "IO controller" depends on BLOCK default n - ---help--- + help Generic block IO controller cgroup interface. This is the common cgroup interface which should be used by various IO controlling policies. @@ -1255,7 +1305,6 @@ config LD_DEAD_CODE_DATA_ELIMINATION bool "Dead code and data elimination (EXPERIMENTAL)" depends on HAVE_LD_DEAD_CODE_DATA_ELIMINATION depends on EXPERT - depends on !(FUNCTION_TRACER && CC_IS_GCC && GCC_VERSION < 40800) depends on $(cc-option,-ffunction-sections -fdata-sections) depends on $(ld-option,--gc-sections) help @@ -1337,7 +1386,7 @@ config MULTIUSER config SGETMASK_SYSCALL bool "sgetmask/ssetmask syscalls support" if EXPERT def_bool PARISC || M68K || PPC || MIPS || X86 || SPARC || MICROBLAZE || SUPERH - ---help--- + help sys_sgetmask and sys_ssetmask are obsolete system calls no longer supported in libc but still enabled by default in some architectures. @@ -1347,7 +1396,7 @@ config SGETMASK_SYSCALL config SYSFS_SYSCALL bool "Sysfs syscall support" if EXPERT default y - ---help--- + help sys_sysfs is an obsolete system call no longer supported in libc. Note that disabling this option is more secure but might break compatibility with some systems. |