boost: add submodule at tag boost-1.61.0

This implements option ceph#4 for external boost, based on upstream discussion. In option ceph#4: 1. boost is added as a submodule 2. builds default to using the attached boost module 3. building against a system-provided boost is supported, but must be configured explicitly Because all of the boost components are attached as nested submodules in the upstream boost repository, neither the nested submodules nor the root boost submodule have been cloned into modules in github.com/ceph (acked by Sage). Signed-off-by: Matt Benjamin <mbenjamin@redhat.com>
linuxbox2 · Sep 26, 2016 · a0e5ab0 · a0e5ab0
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diff --git a/.gitmodules b/.gitmodules
@@ -38,3 +38,6 @@
 	url = https://github.com/ceph/lua.git
 	branch = lua-5.3-ceph
 	ignore = dirty
+[submodule "src/boost"]
+	path = src/boost
+	url = https://github.com/boostorg/boost.git
diff --git a/src/boost b/src/boost