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kumquat-buildroot/toolchain/Config.in
Thomas Petazzoni 874916567a arch: rework MMU option handling and move to "Target architecture" menu 
The MMU option is currently located in the "Toolchain" menu, but it
doesn't make sense as it's really architecture related. In addition,
the selection of MMU has an impact on the choice of binary format
available, which is visible in the architecture menu.

Therefore, this commit moves the MMU option into the architecture
menu.

However, if we simply move it in arch/Config.in, it means that we
would have the following order of options:

 Target architecture
 Target architecture variant
 ABI
 MMU
 Binary format

But really, the MMU option should be right below the Target
architecture variant, and the available ABIs derived from that.

The variant and ABI are arch-specfic, and defined in the per-arch
Config.in fragments; a Kconfig option can have only one prompt defined,
even under conditions, and appears at the place in the menu where its
prompt was defined. So, there is no (easy) possibility to have a
generic option appear where we want it.

Since in fact only 2 architectures show a visible prompt for the MMU
option (RISC-V and Xtensa), we move this option in
arch/Config.in.riscv and arch/Config.in.xtensa.

Some walkthrough the commit:

 - BR2_ARCH_HAS_MMU_MANDATORY and BR2_ARCH_HAS_MMU_OPTIONAL are
   removed as they are no longer needed

 - BR2_USE_MMU becomes a hidden boolean

 - All the places where we used to select BR2_ARCH_HAS_MMU_MANDATORY
   now select BR2_USE_MMU directly.

 - Introduce BR2_RISCV_USE_MMU and BR2_XTENSA_USE_MMU.

 - All defconfigs that used "# BR2_USE_MMU is not set" are switched to
   using the new option.

All in all, this simplifies things quite a bit, and allows to have a
good option ordering in the Target architecture menu.

This commit might raise a concern in terms of backward compatibility
with existing configurations. The only configurations that will be
broken by this change are RISC-V noMMU (which was very recently
introduced) and Xtensa noMMU (which we can probably agree is not such
a widely popular configuration).

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
[yann.morin.1998@free.fr:
  - expand further why we need per-arch MMU options
]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2022-07-27 11:38:07 +02:00

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menu "Toolchain"
# Invisible option that makes sure the toolchain package always gets
# built
config BR2_TOOLCHAIN
bool
default y
# Should be selected for glibc or eglibc
config BR2_TOOLCHAIN_USES_GLIBC
bool
select BR2_USE_WCHAR
select BR2_ENABLE_LOCALE
select BR2_TOOLCHAIN_HAS_FULL_GETTEXT
select BR2_TOOLCHAIN_HAS_THREADS
select BR2_TOOLCHAIN_HAS_THREADS_DEBUG
select BR2_TOOLCHAIN_HAS_THREADS_NPTL
select BR2_TOOLCHAIN_HAS_UCONTEXT
select BR2_TOOLCHAIN_SUPPORTS_PIE
config BR2_TOOLCHAIN_USES_UCLIBC
bool
# ucontext is only available for a subset of the supported
# architectures
select BR2_TOOLCHAIN_HAS_UCONTEXT if BR2_ARM_CPU_HAS_ARM || BR2_i386 \
|| BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el \
|| BR2_sparc || BR2_x86_64
select BR2_TOOLCHAIN_SUPPORTS_PIE if !BR2_m68k && !BR2_microblaze && !BR2_STATIC_LIBS
config BR2_TOOLCHAIN_USES_MUSL
bool
select BR2_USE_WCHAR
select BR2_ENABLE_LOCALE
select BR2_TOOLCHAIN_HAS_THREADS
select BR2_TOOLCHAIN_HAS_THREADS_DEBUG
select BR2_TOOLCHAIN_HAS_THREADS_NPTL
select BR2_TOOLCHAIN_HAS_UCONTEXT
select BR2_TOOLCHAIN_SUPPORTS_PIE if !BR2_STATIC_LIBS
choice
prompt "Toolchain type"
help
Select whether to use the toolchain provided by buildroot
or an external toolchain.
Some vendors provide toolchains in binary form, some in
source form.
config BR2_TOOLCHAIN_BUILDROOT
bool "Buildroot toolchain"
depends on BR2_ARCH_HAS_TOOLCHAIN_BUILDROOT
config BR2_TOOLCHAIN_EXTERNAL
bool "External toolchain"
help
Select if you want to use an existing cross-compiling
toolchain. Buildroot can either download automatically a
toolchain, or use an already installed toolchain.
endchoice
source "toolchain/toolchain-buildroot/Config.in"
source "toolchain/toolchain-external/Config.in"
# Generic toolchain options
# we want gdb config in the middle of both source and external
# toolchains, but mconf won't let us source the same file twice,
# so put it here instead
source "package/gdb/Config.in.host"
comment "Toolchain Generic Options"
# https://sourceware.org/bugzilla/show_bug.cgi?id=27597
# Affect toolchains built with binutils 2.36.1, still not fixed.
config BR2_TOOLCHAIN_HAS_BINUTILS_BUG_27597
bool
default y if BR2_nios2
# Atomic types can be:
# - never lock-free
# - sometimes lock-free
# - always lock-free
# see https://en.cppreference.com/w/c/atomic/ATOMIC_LOCK_FREE_consts
#
# On most architectures, gcc provides "always lock-free" atomic types,
# but a few architectures are limited to "sometimes lock-free"
# types. This hidden option allows to know if the architecture
# provides "always lock-free" atomic types.
config BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS
bool
default y
depends on !BR2_nios2
depends on !BR2_ARM_CPU_ARMV4
depends on !BR2_ARM_CPU_ARMV5
depends on !BR2_sparc_v8
depends on !BR2_m68k_cf5208
# GCC uses thunk functions to adjust the 'this' pointer when calling
# C++ member functions in classes derived with multiple inheritance.
# Generation of thunk functions requires support from the compiler
# back end. In the absence of that support target-independent code
# in the C++ front end is used to generate thunk functions, but it
# does not support vararg functions.
# or1k will support it in the gcc mainline starting with gcc-9.
config BR2_TOOLCHAIN_SUPPORTS_VARIADIC_MI_THUNK
bool
default y
depends on !BR2_or1k
depends on !BR2_xtensa
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43744. This bug no
# reappeared on gcc 9.x and is still not fixed on gcc 11.x
config BR2_TOOLCHAIN_HAS_GCC_BUG_43744
bool
default y if BR2_sh4
depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_8 || \
BR2_TOOLCHAIN_GCC_AT_LEAST_9 || \
BR2_TOOLCHAIN_GCC_AT_LEAST_10 || \
BR2_TOOLCHAIN_GCC_AT_LEAST_11 || \
BR2_TOOLCHAIN_GCC_AT_LEAST_12
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63261. This bug no
# longer exists in gcc 8.x.
config BR2_TOOLCHAIN_HAS_GCC_BUG_63261
bool
default y if BR2_microblaze
depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_8
# Prior to gcc 7.x, exception_ptr, nested_exception and future from
# libstdc++ would only be provided on architectures that support
# always lock-free atomic ints. See
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64735. This issue has
# been removed in GCC 7.x, where exception propagation is now
# supported without lock-free atomic int.
config BR2_TOOLCHAIN_HAS_GCC_BUG_64735
bool
default y if !BR2_TOOLCHAIN_SUPPORTS_ALWAYS_LOCKFREE_ATOMIC_INTS && \
!BR2_TOOLCHAIN_GCC_AT_LEAST_7
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68485. This bug still
# exists in gcc 9.x
config BR2_TOOLCHAIN_HAS_GCC_BUG_68485
bool
default y if BR2_microblaze
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83143
# Error: invalid operands (*UND* and .text sections) for `-' on sh4.
# This bug no longer exists in gcc 10.x but reappeared on gcc 11.x and
# it still not been fixed yet.
config BR2_TOOLCHAIN_HAS_GCC_BUG_83143
bool
default y if BR2_sh
depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_10 || BR2_TOOLCHAIN_GCC_AT_LEAST_11 || \
BR2_TOOLCHAIN_GCC_AT_LEAST_12
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85180. This bug no
# longer exists in gcc 8.x.
config BR2_TOOLCHAIN_HAS_GCC_BUG_85180
bool
default y if BR2_microblaze
depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_8
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85862
# An infinite loop exists in the find_base_term() logic of 6.x
# on microblaze. http://autobuild.buildroot.net/results/158e8ebb39713e1b436a5cc1a1916f46c30694df/
config BR2_TOOLCHAIN_HAS_GCC_BUG_85862
bool
default y if BR2_microblaze
depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_7
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90620
# ICE: in do_output_reload, at reload1.c:7978 on microblaze.
# This bug no longer exists in gcc 10.x
config BR2_TOOLCHAIN_HAS_GCC_BUG_90620
bool
default y if BR2_microblaze
depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_10
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93847
# ICE: compiler error: Segmentation fault on Nios II. This bug
# no longer exists in gcc 9.x.
config BR2_TOOLCHAIN_HAS_GCC_BUG_93847
bool
default y if BR2_nios2 && !BR2_TOOLCHAIN_GCC_AT_LEAST_9
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99410
# Error: branch offset out of range on Nios II. This bug
# no longer exists in gcc 8.x but reappeared on gcc 9.x and has been
# fixed on gcc 11.x.
config BR2_TOOLCHAIN_HAS_GCC_BUG_99140
bool
default y if !BR2_TOOLCHAIN_GCC_AT_LEAST_8
default y if BR2_TOOLCHAIN_GCC_AT_LEAST_9 && !BR2_TOOLCHAIN_GCC_AT_LEAST_11
depends on BR2_nios2
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101737
# ICE: SH4 -Os causes internal compiler error. This bug
# still exists in gcc = 11.1.0
config BR2_TOOLCHAIN_HAS_GCC_BUG_101737
bool
default y if BR2_sh
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101915
# ICE: in extract_insn, at recog.c:2294 on microblaze.
# This bug still exists in gcc = 11.1.0
config BR2_TOOLCHAIN_HAS_GCC_BUG_101915
bool
default y if BR2_microblaze
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101916
# ICE: on SH4: Segmentation fault signal terminated program cc1.
# This bug still exists in gcc = 11.1.0
config BR2_TOOLCHAIN_HAS_GCC_BUG_101916
bool
default y if BR2_sh4
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101952
# ICE: on SH4: unaligned opcodes detected in executable segment.
# This bug still exists in gcc = 11.1.0
config BR2_TOOLCHAIN_HAS_GCC_BUG_101952
bool
default y if BR2_sh4
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104028
# ICE: on M68K: Error: value -16034 out of range
# This bug still exists in gcc = 11.1.0
config BR2_TOOLCHAIN_HAS_GCC_BUG_104028
bool
default y if BR2_m68k
config BR2_TOOLCHAIN_HAS_NATIVE_RPC
bool
config BR2_USE_WCHAR
bool
config BR2_ENABLE_LOCALE
bool
config BR2_INSTALL_LIBSTDCPP
bool
config BR2_TOOLCHAIN_HAS_DLANG
bool
config BR2_TOOLCHAIN_HAS_FORTRAN
bool
config BR2_TOOLCHAIN_HAS_THREADS
bool
config BR2_TOOLCHAIN_HAS_THREADS_DEBUG
bool
config BR2_TOOLCHAIN_HAS_THREADS_NPTL
bool
config BR2_TOOLCHAIN_HAS_SSP
bool
config BR2_TOOLCHAIN_HAS_SSP_STRONG
bool
default y if BR2_TOOLCHAIN_HAS_SSP && BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
config BR2_TOOLCHAIN_HAS_UCONTEXT
bool
config BR2_TOOLCHAIN_HAS_OPENMP
bool
config BR2_TOOLCHAIN_SUPPORTS_PIE
bool
config BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_COPY
bool "Copy gconv libraries"
depends on BR2_TOOLCHAIN_USES_GLIBC
help
The gconv libraries are used to convert between different
character sets (charsets).
Say 'y' if you need to store and/or display different
charsets.
config BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_LIST
string "Gconv libraries to copy"
depends on BR2_TOOLCHAIN_GLIBC_GCONV_LIBS_COPY
help
Set to the list of gconv libraries to copy.
Leave empty to copy all gconv libraries.
Specify only the basename of the libraries, leave
out the .so extension. Eg.:
IBM850 ISO8859-15 UNICODE
Note: the full set of gconv libs are ~8MiB (on ARM).
config BR2_TOOLCHAIN_EXTRA_LIBS
string "Extra toolchain libraries to be copied to target"
default BR2_TOOLCHAIN_EXTRA_EXTERNAL_LIBS if BR2_TOOLCHAIN_EXTRA_EXTERNAL_LIBS != "" # legacy
depends on !BR2_STATIC_LIBS
help
If your toolchain provides extra libraries that need to be
copied to the target filesystem, enter them here, separated
by spaces. The library should not include a suffix or any
type of pre/post wildcard.
Examples where this can be useful is for adding debug
libraries to the target like the GCC libsanitizer.
e.g. "libasan liblsan libtsan libubsan"
# This boolean is true if the toolchain provides a built-in full
# featured gettext implementation (glibc), and false if only a stub
# gettext implementation is provided (uclibc, musl)
config BR2_TOOLCHAIN_HAS_FULL_GETTEXT
bool
config BR2_TARGET_OPTIMIZATION
string "Target Optimizations"
default ""
help
Optimizations to use when building for the target host.
NOTE: gcc optimization level is defined in build options.
config BR2_TARGET_LDFLAGS
string "Target linker options"
help
Extra options to pass to the linker when building for the
target.
Note that options with a '$' sign (eg.
-Wl,-rpath='$ORIGIN/../lib') are not supported.
config BR2_ECLIPSE_REGISTER
bool "Register toolchain within Eclipse Buildroot plug-in"
help
This options tells Buildroot to generate the necessary
configuration files to make your toolchain appear within
Eclipse, through the Eclipse Buildroot plugin.
# Options for packages to depend on, if they require at least a
# specific version of the kernel headers.
# Toolchains should choose the adequate option (ie. the highest
# version, not all of them).
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
bool
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_1
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_1
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_5
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_6
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_5
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_6
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_8
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_9
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_8
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_9
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_11
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_11
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_14
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_14
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_16
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_16
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_18
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_19
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_18
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_19
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_1
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_1
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_7
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_8
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_7
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_9
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_8
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_10
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_9
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_11
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_10
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_12
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_11
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_13
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_12
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_14
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_13
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_15
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_14
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_16
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_15
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_17
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_16
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_18
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_17
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_19
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_18
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_20
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_19
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_0
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_20
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_1
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_0
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_2
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_1
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_3
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_2
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_4
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_3
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_5
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_4
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_6
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_5
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_7
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_6
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_8
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_7
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_9
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_8
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_10
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_9
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_11
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_10
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_12
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_11
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_13
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_12
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_14
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_13
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_15
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_14
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_16
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_15
config BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_17
bool
select BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_16
select BR2_TOOLCHAIN_HEADERS_LATEST
# This should be selected by the latest version, above, to indicate that
# Buildroot does not know of more recent headers than the ones selected.
# This allows using toolchains with headers more recent than Buildroot
# knows about, while still enforcing strict check for older headers.
config BR2_TOOLCHAIN_HEADERS_LATEST
bool
# This order guarantees that the highest version is set, as kconfig
# stops affecting a value on the first matching default.
config BR2_TOOLCHAIN_HEADERS_AT_LEAST
string
default "5.16" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_16
default "5.15" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_15
default "5.14" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_14
default "5.13" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_13
default "5.12" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_12
default "5.11" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_11
default "5.10" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_10
default "5.9" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_9
default "5.8" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_8
default "5.7" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_7
default "5.6" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_6
default "5.5" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_5
default "5.4" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_4
default "5.3" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_3
default "5.2" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_2
default "5.1" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_1
default "5.0" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_0
default "4.20" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_20
default "4.19" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_19
default "4.18" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_18
default "4.17" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_17
default "4.16" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_16
default "4.15" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_15
default "4.14" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_14
default "4.13" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_13
default "4.12" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_12
default "4.11" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_11
default "4.10" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_10
default "4.9" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_9
default "4.8" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_8
default "4.7" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_7
default "4.6" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_6
default "4.5" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5
default "4.4" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_4
default "4.3" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_3
default "4.2" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_2
default "4.1" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_1
default "4.0" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_0
default "3.19" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_19
default "3.18" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_18
default "3.17" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_17
default "3.16" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_16
default "3.15" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_15
default "3.14" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_14
default "3.13" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_13
default "3.12" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12
default "3.11" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_11
default "3.10" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
default "3.9" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_9
default "3.8" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_8
default "3.7" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_7
default "3.6" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_6
default "3.5" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_5
default "3.4" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4
default "3.3" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_3
default "3.2" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
default "3.1" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_1
default "3.0" if BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_0
default "2.6"
config BR2_TOOLCHAIN_GCC_AT_LEAST_4_3
bool
config BR2_TOOLCHAIN_GCC_AT_LEAST_4_4
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_4_3
config BR2_TOOLCHAIN_GCC_AT_LEAST_4_5
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_4_4
config BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_4_5
config BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
config BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
config BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
config BR2_TOOLCHAIN_GCC_AT_LEAST_5
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
config BR2_TOOLCHAIN_GCC_AT_LEAST_6
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_5
config BR2_TOOLCHAIN_GCC_AT_LEAST_7
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_6
config BR2_TOOLCHAIN_GCC_AT_LEAST_8
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_7
config BR2_TOOLCHAIN_GCC_AT_LEAST_9
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_8
config BR2_TOOLCHAIN_GCC_AT_LEAST_10
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_9
config BR2_TOOLCHAIN_GCC_AT_LEAST_11
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_10
config BR2_TOOLCHAIN_GCC_AT_LEAST_12
bool
select BR2_TOOLCHAIN_GCC_AT_LEAST_11
# This order guarantees that the highest version is set, as kconfig
# stops affecting a value on the first matching default.
config BR2_TOOLCHAIN_GCC_AT_LEAST
string
default "12" if BR2_TOOLCHAIN_GCC_AT_LEAST_12
default "11" if BR2_TOOLCHAIN_GCC_AT_LEAST_11
default "10" if BR2_TOOLCHAIN_GCC_AT_LEAST_10
default "9" if BR2_TOOLCHAIN_GCC_AT_LEAST_9
default "8" if BR2_TOOLCHAIN_GCC_AT_LEAST_8
default "7" if BR2_TOOLCHAIN_GCC_AT_LEAST_7
default "6" if BR2_TOOLCHAIN_GCC_AT_LEAST_6
default "5" if BR2_TOOLCHAIN_GCC_AT_LEAST_5
default "4.9" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
default "4.8" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
default "4.7" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
default "4.6" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_6
default "4.5" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_5
default "4.4" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_4
default "4.3" if BR2_TOOLCHAIN_GCC_AT_LEAST_4_3
config BR2_TOOLCHAIN_HAS_MNAN_OPTION
bool
default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
config BR2_TOOLCHAIN_HAS_SYNC_1
bool
default y
depends on !BR2_m68k_cf
depends on !BR2_microblaze
depends on !BR2_sparc
depends on !(BR2_arc && !BR2_ARC_ATOMIC_EXT)
config BR2_TOOLCHAIN_HAS_SYNC_2
bool
default y if BR2_TOOLCHAIN_HAS_SYNC_1
config BR2_TOOLCHAIN_HAS_SYNC_4
bool
default y
depends on !BR2_m68k_cf
depends on !BR2_sparc
depends on !(BR2_arc && !BR2_ARC_ATOMIC_EXT)
# The availability of __sync for 8-byte types on ARM is somewhat
# complicated:
#
# - It appeared in gcc starting with gcc 4.7.
#
# - On ARMv7, there is no problem, it can be directly implemented in
# userspace.
#
# - On < ARMv7, it requires help from the kernel. Unfortunately, the
# libgcc code implementing 8-byte __sync with the help from the
# kernel calls __write() when a failure occurs, which is a function
# internal to glibc, not available in uClibc and musl. This means
# that the 8-byte __sync operations are not available on < ARMv7
# with uClibc and musl. This problem was fixed as part of gcc
# PR68059, which was backported to the gcc 5 branch, but isn't yet
# part of any gcc 5.x release.
#
config BR2_TOOLCHAIN_ARM_HAS_SYNC_8
bool
default y
depends on BR2_arm || BR2_armeb
depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_7
depends on BR2_TOOLCHAIN_USES_GLIBC || BR2_ARM_CPU_ARMV7A
# 8-byte intrinsics available on most x86 CPUs, except a few old ones
config BR2_TOOLCHAIN_X86_HAS_SYNC_8
bool
default y
depends on BR2_i386
depends on !BR2_x86_i486
depends on !BR2_x86_c3
depends on !BR2_x86_winchip_c6
depends on !BR2_x86_winchip2
# 8-byte intrinsics available:
# - On all 64 bits architecture
# - On a certain combinations of ARM platforms
# - On certain x86 32 bits CPUs
config BR2_TOOLCHAIN_HAS_SYNC_8
bool
default y if BR2_ARCH_IS_64
default y if BR2_TOOLCHAIN_ARM_HAS_SYNC_8
default y if BR2_TOOLCHAIN_X86_HAS_SYNC_8
# libatomic is available since gcc 4.8, when thread support is
# enabled. Also, libatomic doesn't recognize "uclinux" as a valid OS
# part of the tuple, and is therefore not build on uclinux targets,
# which is why BR2_BINFMT_FLAT configurations are excluded.
config BR2_TOOLCHAIN_HAS_LIBATOMIC
bool
default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 && \
!BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_AARCH64 && \
BR2_TOOLCHAIN_HAS_THREADS && \
!BR2_BINFMT_FLAT
# __atomic intrinsics are available:
# - with gcc 4.8, either through built-ins or libatomic, on all
# architectures. Since we don't want to separate the cases where
# libatomic is needed vs. not needed, we simplify thing and only
# support situations where libatomic is available, even if on some
# architectures libatomic is not strictly needed as all __atomic
# intrinsics might be built-in. The only case where libatomic is
# missing entirely is when the toolchain does not have support for
# threads. However, a package that does not need threads but still
# uses atomics is quite a corner case, which does not warrant the
# added complexity.
# - with gcc 4.7, libatomic did not exist, so only built-ins are
# available. This means that __atomic can only be used in a subset
# of the architectures
config BR2_TOOLCHAIN_HAS_ATOMIC
bool
default y if BR2_TOOLCHAIN_HAS_LIBATOMIC
default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_arm
default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_armeb
default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_xtensa
default y if BR2_TOOLCHAIN_GCC_AT_LEAST_4_7 && BR2_ARCH_IS_64
# - libquadmath is not needed/available on all architectures (but gcc
# correctly handles this already).
# - At least, libquadmath is available on:
# - i*86
# - x86_64
# - PowerPC with vector scalar (VSX) instruction set
# - When available, libquadmath requires wchar support.
config BR2_TOOLCHAIN_HAS_LIBQUADMATH
bool
default y if BR2_i386 || BR2_x86_64
default y if BR2_POWERPC_CPU_HAS_VSX
endmenu
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