Before this patch xbps had a constant slice count for every thread.
This resulted in unbalanced thread usage if the workload was
homogenous over the slices.
This patch replaces the naive slice count approach by spinlock based
reservation.
This allows the openssl version to be easily overridden using standard
PKG_CONFIG_PATH overrides, which is required for modern distros that use
openssl 1.1 by default.
Also print diagnostics for the libssl flavor in use, and constrain the
version when using openssl to < 1.1.
Fix the test for vasprintf function which failed with musl libc and
fortify-headers on aarch64:
_vasprintf.c:4:24: error: incompatible type for argument 3 of 'vasprintf'
vasprintf(NULL, NULL, NULL);
^~~~
Original message:
```
fetch_cb.c:80:29: error: ‘h’ directive output may be truncated writing 1 byte into a region of size between 0 and 14 [-Werror=format-truncation=]
snprintf(str, sizeof str, "%02ldh%02ldm",
^~~~~~~~~~~~~~
fetch_cb.c:80:29: note: directive argument in the range [0, 59]
fetch_cb.c:80:3: note: ‘snprintf’ output between 7 and 21 bytes into a destination of size 16
snprintf(str, sizeof str, "%02ldh%02ldm",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
eta / 3600, (eta % 3600) / 60);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fetch_cb.c:83:30: error: ‘%02ld’ directive output may be truncated writing between 2 and 19 bytes into a region of size 16 [-Werror=format-truncation=]
snprintf(str, sizeof str, "%02ldm%02lds",
^~~~~
fetch_cb.c:83:29: note: directive argument in the range [-153722867280912930, 60]
snprintf(str, sizeof str, "%02ldm%02lds",
^~~~~~~~~~~~~~
fetch_cb.c:83:29: note: directive argument in the range [-59, 59]
fetch_cb.c:83:3: note: ‘snprintf’ output between 7 and 25 bytes into a destination of size 16
snprintf(str, sizeof str, "%02ldm%02lds",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
eta / 60, eta % 60);
~~~~~~~~~~~~~~~~~~~
fetch_cb.c:80:29: error: ‘h’ directive output may be truncated writing 1 byte into a region of size between 0 and 14 [-Werror=format-truncation=]
snprintf(str, sizeof str, "%02ldh%02ldm",
^~~~~~~~~~~~~~
fetch_cb.c:80:29: note: directive argument in the range [0, 59]
fetch_cb.c:80:3: note: ‘snprintf’ output between 7 and 21 bytes into a destination of size 16
snprintf(str, sizeof str, "%02ldh%02ldm",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
eta / 3600, (eta % 3600) / 60);
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fetch_cb.c:83:30: error: ‘%02ld’ directive output may be truncated writing between 2 and 19 bytes into a region of size 16 [-Werror=format-truncation=]
snprintf(str, sizeof str, "%02ldm%02lds",
^~~~~
fetch_cb.c:83:29: note: directive argument in the range [-153722867280912930, 60]
snprintf(str, sizeof str, "%02ldm%02lds",
^~~~~~~~~~~~~~
fetch_cb.c:83:29: note: directive argument in the range [-59, 59]
fetch_cb.c:83:3: note: ‘snprintf’ output between 7 and 25 bytes into a destination of size 16
snprintf(str, sizeof str, "%02ldm%02lds",
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
eta / 60, eta % 60);
~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
```
