directfb: don't error out for warnings in system headers
authorTim-Philipp Müller <tim@centricular.com>
Fri, 25 May 2018 18:49:34 +0000 (19:49 +0100)
committerTim-Philipp Müller <tim@centricular.com>
Mon, 28 May 2018 09:43:37 +0000 (10:43 +0100)
commit88fec19ba2b3be19f1f4861389daa8c87d38b14d
tree1ec3445558d6f17e0f748ad275f834314762d26b
parent19f45851817c33bdfcf1672f8df7e89f5b50d59d
directfb: don't error out for warnings in system headers

On debian system headers trigger compiler warnings like these,
don't error out on them:
/usr/include/directfb/direct/os/linux/glibc/waitqueue.h:95:1: note: previous definition of ‘direct_waitqueue_signal’ was here
ext/directfb/Makefile.am
tests/examples/directfb/Makefile.am