crosstool-ng/scripts/build/arch/xtensa.sh

# Compute Xtensa-specific values

CT_DoArchTupleValues()
{
    # The architecture part of the tuple:
    CT_TARGET_ARCH="${CT_ARCH}${CT_ARCH_SUFFIX}"
    CT_ARCH_ENDIAN_CFLAG=""
    CT_ARCH_ENDIAN_LDFLAG=""
}

CT_DoArchUClibcConfig()
{
    local cfg="${1}"

    CT_DoArchUClibcSelectArch "${cfg}" "xtensa"
}
xtensa: add support for the configurable Xtensa architecture. The Xtensa processor architecture is a configurable, extensible, and synthesizable 32-bit RISC processor core. Processor and SOC vendors can select from various processor options and even create customized instructions in addition to a base ISA to tailor the processor for a particular application. Because of the configurability, the build process requires one additional step for gcc, binutils, and gdb to update the default configuration. These configurations are packed into an 'overlay' tar image, and are simply untarred on top of the default configuration during the build. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 2013-07-24 22:10:47 +00:00			`# Compute Xtensa-specific values`

Add config flags for omitting 'arch' and 'vendor' ... parts of the config tuple. While here, remove parts that are setting portions of the target tuple to a value that's already the default. Signed-off-by: Alexey Neyman <stilor@att.net> 2018-12-10 09:10:01 +00:00			`CT_DoArchTupleValues()`
			`{`
xtensa: add support for the configurable Xtensa architecture. The Xtensa processor architecture is a configurable, extensible, and synthesizable 32-bit RISC processor core. Processor and SOC vendors can select from various processor options and even create customized instructions in addition to a base ISA to tailor the processor for a particular application. Because of the configurability, the build process requires one additional step for gcc, binutils, and gdb to update the default configuration. These configurations are packed into an 'overlay' tar image, and are simply untarred on top of the default configuration during the build. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 2013-07-24 22:10:47 +00:00			`# The architecture part of the tuple:`
			`CT_TARGET_ARCH="${CT_ARCH}${CT_ARCH_SUFFIX}"`
xtensa: fix endianness support To build uClibc correctly we need correct endianness selected in the crosstool-NG. Xtensa cores may be little- or big-endian, but this property is static. The toolchain knows the core endianness and doesn't need options to select it. Enable ARCH_SUPPORTS_BOTH_ENDIAN and select LE by default. Specify empty CT_ARCH_ENDIAN_CFLAG so that -m{big,little}-endian don't get added to the TARGET_CFLAGS, as it's not supported by gcc. Specify empty CT_ARCH_ENDIAN_LDFLAG so that -EB/-EL don't get added to the TARGET_LDFLAGS as they are ignored. Select big-endian in the example xtensa-unknown-linux-uclibc configuration. This fixes uClibc toolchain build for little-endian cores. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 2016-10-24 21:48:57 +00:00			`CT_ARCH_ENDIAN_CFLAG=""`
			`CT_ARCH_ENDIAN_LDFLAG=""`
xtensa: add support for the configurable Xtensa architecture. The Xtensa processor architecture is a configurable, extensible, and synthesizable 32-bit RISC processor core. Processor and SOC vendors can select from various processor options and even create customized instructions in addition to a base ISA to tailor the processor for a particular application. Because of the configurability, the build process requires one additional step for gcc, binutils, and gdb to update the default configuration. These configurations are packed into an 'overlay' tar image, and are simply untarred on top of the default configuration during the build. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> 2013-07-24 22:10:47 +00:00			`}`

Add config flags for omitting 'arch' and 'vendor' ... parts of the config tuple. While here, remove parts that are setting portions of the target tuple to a value that's already the default. Signed-off-by: Alexey Neyman <stilor@att.net> 2018-12-10 09:10:01 +00:00			`CT_DoArchUClibcConfig()`
			`{`
uClibc: Split configuration tweaker into per-arch functions. Signed-off-by: Alexey Neyman <stilor@att.net> 2016-04-04 15:25:07 +00:00			`local cfg="${1}"`

			`CT_DoArchUClibcSelectArch "${cfg}" "xtensa"`
			`}`