fmt: add libfmt submodule

libfmt is a library for fast printf() support in C++, it is used by
seastar. but it's missing in xenial. so we need to ship it in our dist
tarball and build if if it's not found in system.

Signed-off-by: Kefu Chai <kchai@redhat.com>

diff --git a/.gitmodules b/.gitmodules
index f68b57fa809785dd0daad6f579754588c4d61c03..c8cd4d433a55bf5d689aec85598f8294a920a2a2 100644 (file)
--- a/.gitmodules
+++ b/.gitmodules
@@ -55,3 +55,6 @@
 [submodule "src/seastar"]
        path = src/seastar
        url = https://github.com/ceph/seastar.git
+[submodule "src/fmt"]
+       path = src/fmt
+       url = https://github.com/ceph/fmt.git

diff --git a/src/fmt b/src/fmt
new file mode 160000 (submodule)
index 0000000..f61e71c
--- /dev/null
+++ b/src/fmt
@@ -0,0 +1 @@
+Subproject commit f61e71ccb9ab253f6d76096b2d958caf38fcccaa