Lines Matching +full:- +full:a

4 running either no operating system or a small RTOS. It is designed to
23 the users have everything in place. But some third-party toolchains
25 it is not possible as these headers have compiler-specific parts and
36 compile a single file and generate a .o file:
38 	$ gcc --specs=picolibc.specs -c foo.c
42 the file. If installed in a separate location, you will need to
45 	$ gcc --specs=/usr/local/picolibc/picolibc.specs -c foo.c
47 When building for an embedded system, you'll probably need to use a
48 longer name for the compiler, something like `riscv-unknown-elf-gcc`
49 or `arm-none-eabi-gcc`.
53 Initializing an embedded system usually requires a combination of
54 hardware, run-time, library and application setup. You may want to
62 default when using -specs=picolibc.specs:
64 	$ gcc -specs=picolibc.specs -o foo.elf foo.c
66 Picocrt goes through a sequence of initialization steps, many of which
69  1) Architecture-specific runtime initialization. For instance, RISC-V
121 embedded hardware which need read-only code and data stored in flash
122 and read-write data allocated in RAM and initialized by picolibc at
128 “Semihosting” is a mechanism used when the application is run under a
136 Picolibc distributes the semihosting implementation as a separate
137 library, `libsemihost.a`. Because it provides interfaces that are used
139 libc. You can do this by using the GCC --oslib=semihost
142 	$ gcc --specs=picolibc.specs --oslib=semihost -o program.elf program.o
147 	$ gcc --specs=picolibc.specs -o program.elf program.o -lc -lsemihost
155 In an environment which provides a useful `_exit` implementation, applications
156 may want to use the `crt0-hosted` variant that calls `exit` when main
157 returns, resulting in a clean return to the hosting environment (this
158 conforms to a hosted execution environment as per the C
159 specification). Select this using the `--crt0=hosted` flag:
161 	$ gcc --specs=picolibc.specs --crt0=hosted -o program.elf program.o
163 In a smaller environment which is not using any constructors (or any
165 `crt0-minimal` variant that removes the call to
167 main returns. Select this using the `--crt0=minimal` flag:
169 	$ gcc --specs=picolibc.specs --crt0=minimal -o program.elf program.o