solana/sdk/bpf/README.md

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## Development
### Quick start
To get started create a `makefile` containing:
```make
include path/to/bpf.mk
```
and `src/program.c` containing:
```c
#include <solana_sdk.h>
bool entrypoint(const uint8_t *input) {
SolKeyedAccount ka[1];
uint8_t *data;
uint64_t data_len;
if (!sol_deserialize(buf, ka, SOL_ARRAY_SIZE(ka), NULL, &data, &data_len)) {
return false;
}
print_params(1, ka, data, data_len);
return true;
}
```
Then run `make` to build `out/program.o`.
Run `make help` for more details.
### Unit tests
Built-in support for unit testing is provided by the
[Criterion](https://criterion.readthedocs.io/en/master/index.html) test framework.
To get started create the file `test/example.c` containing:
```c
#include <criterion/criterion.h>
#include "../src/program.c"
Test(test_suite_name, test_case_name) {
cr_assert(true);
}
```
Then run `make test`.
### Limitations
* Programs must be fully contained within a single .c file
* No libc is available but `solana_sdk.h` provides a minimal set of primitives