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sigchainlib: hopefully fix darwin build breakage.
authorJosh Gao <jmgao@google.com>
Mon, 20 Mar 2017 21:17:23 +0000 (14:17 -0700)
committerJosh Gao <jmgao@google.com>
Thu, 23 Mar 2017 23:16:53 +0000 (16:16 -0700)
commitdd241ae08d497ae8fa1add3e208c4c3bef9a7b79
tree920c075dbc5a29796d7bd53ef86e43205dbf98bf
parent85a78cff8cbd6477c19ab4c9a21698dddcf0a9f9
sigchainlib: hopefully fix darwin build breakage.

Hopefully fix the following darwin build breakage:

  MacOSX10.10.sdk/usr/include/ucontext.h:43:2:
    error: The deprecated ucontext routines require _XOPEN_SOURCE to be defined

Bug: http://b/36205469
Bug: http://b/36262089
Change-Id: I172cef3872053e8c3b0d2c428f3f1e2eaf9540dc
sigchainlib/sigchain.cc