build: Import attributes.m4, detect CFLAGS at build time
authorColin Walters <walters@verbum.org>
Thu, 4 Aug 2016 20:47:46 +0000 (16:47 -0400)
committerAtomic Bot <atomic-devel@projectatomic.io>
Mon, 8 Aug 2016 11:13:06 +0000 (11:13 +0000)
commit76d6afa707add8c5409edbfd939460b632980972
tree258b7184500f5105461b8c0435c45a09a71aff69
parent6b089304bf3cd916d32e5a5d47366183ff1d9a3e
build: Import attributes.m4, detect CFLAGS at build time

I want to add `-Werror=int-conversion`, but it's only available in
newer GCC versions.  So let's start autodetecting available compiler
flags.

Closes: #431
Approved by: giuseppe
buildutil/attributes.m4 [new file with mode: 0644]
configure.ac