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esp-open-rtos/libc/README.md
Our Air Quality f9ae521710 newlib: rebuild with the global stdio streams enabled. 
This change means that there is only one set of global stdin, stdout, and stderr
FILE streams shared by all the threads. This reduces memory usage and avoids
having to close these streams before threads exit. These streams still have a
lock to synchronise access.
2018-02-28 23:44:27 +11:00

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Newlib from git://sourceware.org/git/newlib-cygwin.git with xtensa & locking patches see https://github.com/ourairquality/newlib and built from commit 984b749fb223daab954060c04720933290584f00

The build commands were:

mkdir build cd build ../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-malloc --enable-newlib-nano-formatted-io --enable-newlib-reent-small --disable-newlib-mb --enable-newlib-global-stdio-streams --prefix=/tmp/libc env CROSS_CFLAGS="-DSIGNAL_PROVIDED -DABORT_PROVIDED" make make install