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Use libc from newlib (#1752)

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* Use newlib libc library

This change adds libcmin.a, which is created from newlib libc by selectively removing some of the object files (mostly related to heap management).
The list of files is available in tools/sdk/lib/make_libcmin.sh. Files which are not needed are commented out.
This change adds support for various functions which were missing, like sscanf, strftime, etc.

* Fix some of the time functions

* Redirect stdout to serial

* Implement __putc_r

* Switch to custom newlib build

Built from https://github.com/igrr/newlib-xtensa using:
./configure --with-newlib --enable-multilib --disable-newlib-io-c99-formats --enable-newlib-supplied-syscalls --enable-target-optspace --program-transform-name="s&^&xtensa-lx106-elf-&" --disable-option-checking --with-target-subdir=xtensa-lx106-elf --target=xtensa-lx106-elf --enable-newlib-nano-formatted-io --enable-newlib-reent-small  --prefix=path-to-arduino-core/tools/sdk/libc
CROSS_CFLAGS="-DMALLOC_PROVIDED -DSIGNAL_PROVIDED -DABORT_PROVIDED" make
make install

* Update tests
This commit is contained in:
Ivan Grokhotkov
2016-06-23 17:27:57 +08:00
committed by GitHub
parent d28c551bd2
commit d7d98d03ca
117 changed files with 14937 additions and 565 deletions
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20
tools/sdk/libc/xtensa-lx106-elf/include/sys/_intsup.h Normal file
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/*
* Copyright (c) 2004, 2005 by
* Ralf Corsepius, Ulm/Germany. All rights reserved.
*
* Permission to use, copy, modify, and distribute this software
* is freely granted, provided that this notice is preserved.
*
* Modified for xtensa arch & non-long int32_t, removes automatic setting of __have_long32.
*/
#ifndef _SYS__INTSUP_H
#define _SYS__INTSUP_H
#include <sys/features.h>
#define __STDINT_EXP(x) __##x##__
#define __have_longlong64 1
#endif /* _SYS__INTSUP_H */