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sys/matstat: fix compilation with newlib

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newlib (nano) does not support 64 bit types (neither in stdio nor with
corresponding `PRI*64` macros). With GCC 13.2.1 (as shipped in Ubuntu
24.04.1 LTS), this triggers the following compilation error (even with
`ENABLE_DEBUG == 0`):

    sys/matstat/matstat.c:57:21: error: expected ')' before 'PRIu64'
       57 |     DEBUG("Var: (%" PRIu64 " / (%" PRId32 " - 1)) = %" PRIu64 "\n",
          |                     ^~~~~~

This fixes the issue by falling back to printing 32 bit values when
the `PRIu64` macro is not defined. A `!trunc` is appended when the
64 bit exceeds the range of [0:UINT32_MAX].
This commit is contained in:
Marian Buschsieweke 2024-10-09 21:58:59 +02:00
parent 85172eda49
commit 54f4cd7cd1
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1 changed files with 7 additions and 0 deletions
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7
sys/matstat/matstat.c
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@ -53,8 +53,15 @@ uint64_t matstat_variance(const matstat_state_t *state)
return 0;
}
uint64_t variance = state->sum_sq / (state->count - 1);
#ifdef PRIu64
DEBUG("Var: (%" PRIu64 " / (%" PRId32 " - 1)) = %" PRIu64 "\n",
state->sum_sq, state->count, variance);
#else
DEBUG("Var: (%" PRIu32 "%s / (%" PRId32 " - 1)) = %" PRIu32 "%s\n",
(uint32_t)state->sum_sq, (state->sum_sq > UINT32_MAX) ? "!trunc " : "",
state->count,
(uint32_t)variance, (variance > UINT32_MAX) ? "!trunc " : "");
#endif
return variance;
}