mirror of
https://github.com/crosstool-ng/crosstool-ng.git
synced 2024-12-29 00:58:51 +00:00
8f74ada733
${prefix}/config/target.in | 12 6 6 0 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
245 lines
6.1 KiB
Plaintext
245 lines
6.1 KiB
Plaintext
# Target definition: architecture, optimisations, etc...
|
|
|
|
menu "Target options"
|
|
|
|
comment "General target options"
|
|
|
|
config ARCH
|
|
string
|
|
default "arm" if ARCH_ARM
|
|
default "ia64" if ARCH_IA64
|
|
default "mips" if ARCH_MIPS
|
|
default "sh" if ARCH_SH
|
|
default "x86" if ARCH_x86
|
|
default "x86_64" if ARCH_x86_64
|
|
|
|
choice
|
|
bool
|
|
prompt "Target architecture:"
|
|
default ARCH_x86
|
|
|
|
config ARCH_ARM
|
|
bool
|
|
prompt "arm"
|
|
select ARCH_SUPPORTS_BOTH_ENDIAN
|
|
select ARCH_DEFAULT_LE
|
|
|
|
config ARCH_IA64
|
|
bool
|
|
prompt "ia64 (EXPERIMENTAL)"
|
|
depends on EXPERIMENTAL
|
|
select ARCH_SUPPORTS_BOTH_ENDIAN
|
|
|
|
config ARCH_MIPS
|
|
bool
|
|
prompt "mips"
|
|
select ARCH_SUPPORTS_BOTH_ENDIAN
|
|
select ARCH_DEFAULT_BE
|
|
|
|
config ARCH_SH
|
|
bool
|
|
prompt "sh (EXPERIMENTAL)"
|
|
depends on EXPERIMENTAL
|
|
select ARCH_SUPPORTS_BOTH_ENDIAN
|
|
select ARCH_DEFAULT_LE
|
|
|
|
config ARCH_x86
|
|
bool
|
|
prompt "x86"
|
|
|
|
config ARCH_x86_64
|
|
bool
|
|
prompt "x86_64"
|
|
|
|
endchoice
|
|
|
|
config ARCH_SUPPORTS_BOTH_ENDIAN
|
|
bool
|
|
default n
|
|
|
|
config ARCH_DEFAULT_BE
|
|
bool
|
|
default n
|
|
|
|
config ARCH_DEFAULT_LE
|
|
bool
|
|
default n
|
|
|
|
choice
|
|
bool
|
|
prompt "Endianness:"
|
|
depends on ARCH_SUPPORTS_BOTH_ENDIAN
|
|
default ARCH_BE if ARCH_DEFAULT_BE
|
|
default ARCH_LE if ARCH_DEFAULT_LE
|
|
|
|
config ARCH_BE
|
|
bool
|
|
prompt "Big endian"
|
|
|
|
config ARCH_LE
|
|
bool
|
|
prompt "Little endian"
|
|
|
|
endchoice
|
|
|
|
# Include architecture-specific configuration
|
|
if ARCH_ARM
|
|
source config/arch/arm/config.in
|
|
endif
|
|
if ARCH_IA64
|
|
source config/arch/ia64/config.in
|
|
endif
|
|
if ARCH_MIPS
|
|
source config/arch/mips/config.in
|
|
endif
|
|
if ARCH_SH
|
|
source config/arch/sh/config.in
|
|
endif
|
|
if ARCH_x86
|
|
source config/arch/x86/config.in
|
|
endif
|
|
if ARCH_x86_64
|
|
source config/arch/x86_64/config.in
|
|
endif
|
|
|
|
comment "Target optimisations"
|
|
|
|
config ARCH_ARCH
|
|
string
|
|
prompt "Architecture level"
|
|
default ""
|
|
help
|
|
GCC uses this name to determine what kind of instructions it can emit
|
|
when generating assembly code. This option can be used in conjunction
|
|
with or instead of the ARCH_CPU option (above), or a (command-line)
|
|
-mcpu= option.
|
|
|
|
This is the configuration flag --with-arch=XXXX, and the runtime flag
|
|
-march=XXX.
|
|
|
|
Pick a value from the gcc manual for your choosen gcc version and your
|
|
target CPU.
|
|
|
|
Leave blank if you don't know, or if your target architecture does not
|
|
offer this option.
|
|
|
|
config ARCH_ABI
|
|
string
|
|
prompt "Generate code for the specific ABI"
|
|
default ""
|
|
help
|
|
Generate code for the given ABI.
|
|
|
|
This is the configuration flag --with-abi=XXXX, and the runtime flag
|
|
-mabi=XXX.
|
|
|
|
Pick a value from the gcc manual for your choosen gcc version and your
|
|
target CPU.
|
|
|
|
Leave blank if you don't know, or if your target architecutre does not
|
|
offer this option.
|
|
|
|
config ARCH_CPU
|
|
string
|
|
prompt "Emit assembly for CPU"
|
|
default ""
|
|
help
|
|
This specifies the name of the target processor. GCC uses this name
|
|
to determine what kind of instructions it can emit when generating
|
|
assembly code.
|
|
|
|
This is the configuration flag --with-cpu=XXXX, and the runtime flag
|
|
-mcpu=XXX.
|
|
|
|
Pick a value from the gcc manual for your choosen gcc version and your
|
|
target CPU.
|
|
|
|
Leave blank if you don't know, or if your target architecture does not
|
|
offer this option.
|
|
|
|
config ARCH_TUNE
|
|
string
|
|
prompt "Tune for CPU"
|
|
default ""
|
|
help
|
|
This option is very similar to the ARCH_CPU option (above), except
|
|
that instead of specifying the actual target processor type, and hence
|
|
restricting which instructions can be used, it specifies that GCC should
|
|
tune the performance of the code as if the target were of the type
|
|
specified in this option, but still choosing the instructions that it
|
|
will generate based on the cpu specified by the ARCH_CPU option
|
|
(above), or a (command-line) -mcpu= option.
|
|
|
|
This is the configuration flag --with-tune=XXXX, and the runtime flag
|
|
-mtune=XXX.
|
|
|
|
Pick a value from the gcc manual for your choosen gcc version and your
|
|
target CPU.
|
|
|
|
Leave blank if you don't know, or if your target architecture does not
|
|
offer this option.
|
|
|
|
config ARCH_FPU
|
|
string
|
|
prompt "Use specific FPU"
|
|
default ""
|
|
help
|
|
On some targets (eg. ARM), you can specify the kind of FPU to emit
|
|
code for.
|
|
|
|
This is the configuration flag --with-fpu=XXX, and the runtime flag
|
|
-mfpu=XXX.
|
|
|
|
See below wether to actually emit FP opcodes, or to emulate them.
|
|
|
|
Pick a value from the gcc manual for your choosen gcc version and your
|
|
target CPU.
|
|
|
|
Leave blank if you don't know, or if your target architecture does not
|
|
offer this option.
|
|
|
|
choice
|
|
bool
|
|
prompt "Floating point:"
|
|
|
|
config ARCH_FLOAT_HW
|
|
bool
|
|
prompt "hardware (FPU)"
|
|
help
|
|
Emit hardware floating point opcodes.
|
|
|
|
If you've got a processor with a FPU, then you want that.
|
|
If your hardware has no FPU, you still can use HW floating point, but
|
|
need to compile support for FPU emulation in your kernel. Needless to
|
|
say that emulating the FPU is /slooowwwww/...
|
|
|
|
One situation you'd want HW floating point without a FPU is if you get
|
|
binary blobs from different vendors that are compiling this way and
|
|
can't (don't wan't to) change.
|
|
|
|
config ARCH_FLOAT_SW
|
|
bool
|
|
prompt "software"
|
|
help
|
|
Do not emit any hardware floating point opcode.
|
|
|
|
If your processor has no FPU, then you most probably want this, as it
|
|
is faster than emulating the FPU in the kernel.
|
|
|
|
endchoice
|
|
|
|
config TARGET_CFLAGS
|
|
string
|
|
prompt "Target CFLAGS"
|
|
default ""
|
|
help
|
|
Used to add specific options when compiling libraries of the toolchain,
|
|
that will run on the target (eg. libc.so).
|
|
|
|
Note that the options above for CPU, tune, arch and FPU will be
|
|
automaticaly used. You don't need to specify them here.
|
|
|
|
Leave blank if you don't know better.
|
|
|
|
endmenu
|