`fmt::detail::make_arg` does not accept temporaries, so the code snippet
checking system libfmt needs to be adjusted.
Signed-off-by: Ruoyu Zhong <zhongruoyu@outlook.com>
libfmt 6.1 is in Ubuntu focal repositories.
it's easy to compile with 6.1 by doing
#define detail internal
but 6.1 also produces different results in main.func_sformat
and we want MariaDB to behave identically everywhere.
SFORMAT() SQL function that uses fmtlib (https://fmt.dev/)
for python-like (also Rust, C++20, etc) string formatting
Only fmtlib 7.0.0+ is supported, older fmtlib
produces different results in the test.
No native support for temporal and decimal values,
* TIME_RESULT is handled as STRING_RESULT
* DECIMAL_RESULT as REAL_RESULT
