execl
=====

POSIX specification:
 https://pubs.opengroup.org/onlinepubs/9699919799/functions/execl.html

Gnulib module: execl

Portability problems fixed by Gnulib:

  * On Windows platforms (excluding Cygwin), this function does not pass command-line arguments correctly if they contain space, tab, backslash, or double-quote characters.

  * On Windows platforms (excluding Cygwin), this function spawns an asynchronous child process and then exits the current process immediately.  As a consequence, the parent of the current process 1. may incorrectly proceed as if its child had exited, and 2. will never see the child's exit status.

  * On Windows platforms (excluding Cygwin), the return type of this function is intptr_t, not int.

Note: The Gnulib replacement for this function is not async-safe, that is, it must not be invoked from a signal handler.

Portability problems not fixed by Gnulib:

  * On some platforms, a script without executable permission is still run: Cygwin 1.5.x.