tree 885db14e0df65dd837dc20b21b38aff027ac886a
parent 38fcb6651632b524bbcef8dd85a82d508040d007
author Alon Bar-Lev <alon.barlev@gmail.com> 1559255021 +0300
committer Andreas Fuchs <andreas.fuchs@sit.fraunhofer.de> 1561455113 +0200

build: let autoconf detect system extensions

Move to AC_USE_SYSTEM_EXTENSIONS for automation of detecting supported source
extensions, such as:

* -D_DEFAULT_SOURCE
* -D_BSD_SOURCE
* -D_POSIX_SOURCE

Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>