Lines Matching full:picolibc

1 # Using Picolibc in Embedded Systems
3 Picolibc is designed to be used in deeply embedded systems, those
11 against Picolibc provides the follwoing headers in its default search
26 so whatever version could be imported in the Picolibc, it won't work
31 ## Compiling with Picolibc
33 To compile source code to use Picolibc, you can use the GCC .specs
34 file delivered with Picolibc. This will set the system header file
35 path and the linker library path to point at Picolibc. For example, to
38 	$ gcc --specs=picolibc.specs -c foo.c
40 When installed directly into the system, picolibc.specs is placed in
43 provide an absolute pathname to the picolibc.specs file:
45 	$ gcc --specs=/usr/local/picolibc/picolibc.specs -c foo.c
51 ## Picolibc startup
56 Picolibc startup code. Either works fine, using the Picolibc code
59 ### Picocrt — Picolibc startup code
61 Picocrt is the crt0.o code provided by Picolibc. This is enabled by
62 default when using -specs=picolibc.specs:
64 	$ gcc -specs=picolibc.specs -o foo.elf foo.c
118 Picolibc provides two sample linker scripts: `picolibc.ld` for C
122 and read-write data allocated in RAM and initialized by picolibc at
130 functionality of the OS running the debugger or emulator. Picolibc
136 Picolibc distributes the semihosting implementation as a separate
140 command line flag defined by picolibc.specs:
142 	$ gcc --specs=picolibc.specs --oslib=semihost -o program.elf program.o
147 	$ gcc --specs=picolibc.specs -o program.elf program.o -lc -lsemihost
151 The default `crt0` version provided by Picolibc calls any constructors
161 	$ gcc --specs=picolibc.specs --crt0=hosted -o program.elf program.o
164 Picolibc code which requires constructors) may want to use the
169 	$ gcc --specs=picolibc.specs --crt0=minimal -o program.elf program.o