From b8e64a0c08ea2c3b2940d8e7154970f0dc610ed5 Mon Sep 17 00:00:00 2001 From: Erico Nunes Date: Sun, 21 Jun 2015 20:53:06 -0300 Subject: avr-libc: add support for avr-libc C library 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 --- scripts/functions | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'scripts/functions') diff --git a/scripts/functions b/scripts/functions index e62fba2b..0fe8239a 100644 --- a/scripts/functions +++ b/scripts/functions @@ -1206,6 +1206,11 @@ CT_DoBuildTargetTuple() { *glibc) CT_TARGET_SYS=gnu;; uClibc) CT_TARGET_SYS=uclibc;; musl) CT_TARGET_SYS=musl;; + avr-libc) + # avr-libc only seems to work with the non-canonical "avr" target. + CT_TARGET_SKIP_CONFIG_SUB=y + CT_TARGET_SYS= # CT_TARGET_SYS must be empty too + ;; *) CT_TARGET_SYS=elf;; esac @@ -1259,7 +1264,10 @@ CT_DoBuildTargetTuple() { esac # Canonicalise it - CT_TARGET=$(CT_DoConfigSub "${CT_TARGET}") + if [ "${CT_TARGET_SKIP_CONFIG_SUB}" != "y" ]; then + CT_TARGET=$(CT_DoConfigSub "${CT_TARGET}") + fi + # Prepare the target CFLAGS CT_ARCH_TARGET_CFLAGS="${CT_ARCH_TARGET_CFLAGS} ${CT_ARCH_ENDIAN_CFLAG}" CT_ARCH_TARGET_CFLAGS="${CT_ARCH_TARGET_CFLAGS} ${CT_ARCH_ARCH_CFLAG}" -- cgit v1.2.3