diff --git a/os/libtai/CMakeLists.txt b/os/libtai/CMakeLists.txt
new file mode 100644
index 000000000..e4d27240f
--- /dev/null
+++ b/os/libtai/CMakeLists.txt
@@ -0,0 +1,50 @@
+set(LIBYAPTAI_MAJOR_VERSION 0)
+set(LIBYAPTAI_MINOR_VERSION 60)
+set(LIBYAPTAI_PATCH_VERSION 0)
+set(LIBYAPTAI_FULL_VERSION
+  ${LIBYAPTAI_MAJOR_VERSION}.${LIBYAPTAI_MINOR_VERSION}.${LIBYAPTAI_PATCH_VERSION})
+
+set(LIBYAPTAI_SOURCES
+  tai_add.c
+  tai_now.c
+  tai_pack.c
+  tai_sub.c
+  tai_unpack.c 
+  taia_add.c
+  taia_approx.c
+  taia_fmtfrac.c
+  taia_frac.c
+  taia_half.c
+  taia_less.c
+  taia_now.c
+  taia_pack.c
+  taia_sub.c
+  taia_tai.c
+  taia_unpack.c
+  caldate_fmt.c
+  caldate_scan.c
+  caldate_fmjd.c
+  caldate_mjd.c
+  caldate_norm.c
+  caldate_ster.c
+  leapsecs_read.c
+  leapsecs_init.c
+  leapsecs_add.c
+  leapsecs_sub.c
+  caltime_fmt.c
+  caltime_scan.c
+  caltime_tai.c
+  caltime_utc.c
+  )
+
+add_library (libyaptai OBJECT
+  ${LIBYAPTAI_SOURCES})
+
+set_target_properties(libyaptai
+  PROPERTIES RPATH ${libdir} VERSION ${LIBYAPTAI_FULL_VERSION}
+  SOVERSION ${LIBYAPTAI_MAJOR_VERSION}.${LIBYAPTAI_MINOR_VERSION}
+  OUTPUT_NAME yaptai
+  )
+
+
+