Lines Matching full:picolibc

1 # Picolibc and Operating Systems
3 Picolibc is designed to be operating-system independent, so it doesn't
5 Picolibc need system support, like I/O and task termination.
7 ## System Interfaces used by Picolibc
9 Here's the full list of system functions used by Picolibc, split into
14 Picolibc stdio splits support for simple console input/output and more
91 The code needed for this is built into Picolibc by default, but can be
104 Both versions of malloc in picolibc require sbrk to be supported. The
112 Picolibc includes a simple version of sbrk that can return chunks of
119 The sample linker script provided with picolibc defines these two
127 return. The picolibc implementation of `abort` calls `raise`; if that
128 returns, it then calls `_exit`. The picolibc version of `raise` also
136 To get Picolibc to use a system library, that library needs to be
137 specified *after* libc on the linker command line. The picolibc.specs
144 functions used by picolibc from libmyos.a. You can, alternatively,
151 For RISC-V and ARM processors, Picolibc provides an implementation of
153 the Picolibc test suite. This implementation relies on semihosting
164 As a build-time option, Picolibc can be configured to use POSIX read
169 ## Building picolibc on native POSIX systems
171 To allow for testing of picolibc and applications using picolibc, you
172 can actually build picolibc on a full POSIX system. In this
173 configuration, picolibc provides the non-POSIX libc APIs while the
176 picolibc configuration parameters:
185 		-Dincludedir=lib/picolibc/include \
186 		-Dlibdir=lib/picolibc/lib \
189  * -Dtls-model=global-dynamic makes picolibc use the default TLS model
192  * -Dmultilib=false makes picolibc build only a single library for the
196    to picolibc so that the underlying system support is used instead.
205    so that picolibc acts like a regular C library.
210  * -Dspecsdir=none disables installing picolibc.specs as that file
213 Once built, you can install and use picolibc on the host:
215 	$ cc -I/usr/local/lib/picolibc/include hello-world.c \
216 		/usr/local/lib/picolibc/lib/libc.a