GitLab

* Unless LIBC_FATAL_STDERR_ is set to 1 in the environment, memory
  problems detected by glibc malloc will be dumped on /dev/tty, but
  we'd rather have those in the log files.

* This saves on external commands in configure phase.
* Also, using sed -n 1,5p instead of sed 5q prevents ifort from dying on SIGPIPE.

* This allows more accesses to be computational instead of conditional.

* Also use function return value instead of more out parameters.

* The offending behaviour indeed starts at pgfortran 14.1.

* This prevents unnecessary copying.