Lines Matching +full:- +full:a

3 Picolibc is designed to be operating-system independent, so it doesn't
15 complex file operations so that a minimal system can easily support
16 the former with only a few functions.
20 FILE objects. The pointers may reside in read-only memory, but the
21 FILE objects may not. A single FILE object may be used for all three
43 It also contains a pointer to an optional `flush` function, which, if
55 These functions are used to initialize a FILE structure:
62 This defines a FILE which can read and write characters using the putc
68 |-------------------|------------|--------------------|
82 Support for these requires malloc/free along with a handful of
83 POSIX-compatible functions:
92 disabled by specifying `-Dposix-io=false` in the meson command line.
96 Exit is just a wrapper around _exit that also calls destructors and
105 smaller version, enabled (by default) with -Dnewlib-nano-malloc=true,
106 can handle sbrk returning dis-continuous memory while the larger
107 version (enabled with -Dnewlib-nano-malloc=false) requires sbrk return
112 Picolibc includes a simple version of sbrk that can return chunks of
113 memory from a pre-defined contiguous heap. To use this function, your
129 calls `_exit` for uncaught and un-ignored signals.
136 To get Picolibc to use a system library, that library needs to be
138 file provides a way to specify a library after libc using the
139 `--oslib=` parameter:
141 	$ gcc -o program.elf program.o --oslib=myos
143 This will include -lmyos after -lc so that the linker can resolve
144 functions used by picolibc from libmyos.a. You can, alternatively,
151 For RISC-V and ARM processors, Picolibc provides an implementation of
152 all of the above functions along with a couple more POSIX APIs used by
156 application using `--oslib=semihost` in your link command line.
157 Please note that this will replace the default `crt0` with a variant
159 infinite loop, and the change ensure a clean return to the execution
164 As a build-time option, Picolibc can be configured to use POSIX read
166 `-Dposix-console=true` to enable this. This is incompatible with
172 can actually build picolibc on a full POSIX system. In this
173 configuration, picolibc provides the non-POSIX libc APIs while the
175 above. To build in this mode, you'll need to override a few default
179 		-Dtls-model=global-dynamic \
180 		-Dmultilib=false \
181 		-Dpicolib=false \
182 		-Dpicocrt=false \
183 		-Dposix-console=true \
184 		-Dnewlib-global-atexit=true \
185 		-Dincludedir=lib/picolibc/include \
186 		-Dlibdir=lib/picolibc/lib \
187 		-Dspecsdir=none
189  * -Dtls-model=global-dynamic makes picolibc use the default TLS model
192  * -Dmultilib=false makes picolibc build only a single library for the
195  * -Dpicolib=false disables building the TLS and sbrk support built-in
198  * -Dpicocrt=false disables building the C startup code as that is
201  * -Dposix-console=true uses POSIX I/O read/write APIs for stdin,
204  * -Dnewlib-global-atexit=true disables the per-thread atexit behavior
205    so that picolibc acts like a regular C library.
207  * -Dincludedir and -Dlibdir specify install locations for the headers
210  * -Dspecsdir=none disables installing picolibc.specs as that file
215 	$ cc -I/usr/local/lib/picolibc/include hello-world.c \
216 		/usr/local/lib/picolibc/lib/libc.a