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b8e64a0c08
This commit adds support for the avr-libc C library. According to the project page at http://www.nongnu.org/avr-libc , the avr-libc package provides a subset of the standard C library for Atmel AVR 8-bit RISC microcontrollers. In addition, the library provides the basic startup code needed by most applications. Support for this library in crosstool-ng is only enabled for the AVR 8-bit target. The avr-libc manual and most distributions build the AVR 8-bit gcc toolchain with the "avr" (non-canonical) target. Some experimentation also led to the conclusion that other (canonical) targets are not very well supported, so we force the "avr" target for crosstool-ng as well. The manual also recommends building avr-libc after the final gcc build. To accomplish this with crosstool-ng, a new do_libc_post_cc step is added, in which currently only avr-libc performs its build, and is a no-op for the other libc options. Signed-off-by: Erico Nunes <nunes.erico@gmail.com>
52 lines
1.2 KiB
Plaintext
52 lines
1.2 KiB
Plaintext
# avr-libc options
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## depends on ARCH_avr
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## depends on ! LINUX && ! WINDOWS && BARE_METAL
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##
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## select LIBC_SUPPORT_THREADS_NONE
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##
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## help The AVR Libc package provides a subset of the standard C library for
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## help Atmel AVR 8-bit RISC microcontrollers. In addition, the library
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## help provides the basic startup code needed by most applications.
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choice
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bool
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prompt "avr-libc version"
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# Don't remove next line
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# CT_INSERT_VERSION_BELOW
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config LIBC_AVR_LIBC_V_1_8_1
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bool
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prompt "1.8.1"
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config LIBC_AVR_LIBC_V_1_8_0
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bool
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prompt "1.8.0"
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config LIBC_AVR_LIBC_CUSTOM
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bool
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prompt "Custom avr-libc"
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depends on EXPERIMENTAL
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endchoice
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if LIBC_AVR_LIBC_CUSTOM
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config LIBC_AVR_LIBC_CUSTOM_LOCATION
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string
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prompt "Full path to custom avr-libc source"
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default ""
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help
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Enter the path to the directory (or tarball) of your source for avr-libc,
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or leave blank to use default CT_CUSTOM_LOCATION_ROOT_DIR/avr-libc
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endif # LIBC_AVR_LIBC_CUSTOM
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config LIBC_VERSION
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string
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# Don't remove next line
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# CT_INSERT_VERSION_STRING_BELOW
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default "1.8.1" if LIBC_AVR_LIBC_V_1_8_1
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default "1.8.0" if LIBC_AVR_LIBC_V_1_8_0
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default "custom" if LIBC_AVR_LIBC_CUSTOM
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