From 3e15ca3602ca6a16995f79a9857fdc12ad69286b Mon Sep 17 00:00:00 2001
From: Adam Moody <moody20@llnl.gov>
Date: Wed, 29 Dec 2021 17:31:29 -0800
Subject: [PATCH] cmake check for libattr

Signed-off-by: Adam Moody <moody20@llnl.gov>
---
 CMakeLists.txt          |  7 +++++++
 cmake/FindLibAttr.cmake | 25 +++++++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 cmake/FindLibAttr.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index dc934b09..6ec7a78d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,6 +15,13 @@ LIST(APPEND CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/cmake")
 OPTION(ENABLE_XATTRS "Enable code for extended attributes" ON)
 IF(ENABLE_XATTRS)
   ADD_DEFINITIONS(-DDCOPY_USE_XATTRS)
+
+  FIND_PACKAGE(LibAttr REQUIRED)
+  IF(LibAttr_FOUND)
+    ADD_DEFINITIONS(-DHAVE_LIBATTR)
+    INCLUDE_DIRECTORIES(${LibAttr_INCLUDE_DIRS})
+    LIST(APPEND MFU_EXTERNAL_LIBS ${LibAttr_LIBRARIES})
+  ENDIF(LibAttr_FOUND)
 ENDIF(ENABLE_XATTRS)
 
 OPTION(ENABLE_LUSTRE "Enable optimization and features for Lustre" OFF)
diff --git a/cmake/FindLibAttr.cmake b/cmake/FindLibAttr.cmake
new file mode 100644
index 00000000..b5ca36b0
--- /dev/null
+++ b/cmake/FindLibAttr.cmake
@@ -0,0 +1,25 @@
+# - Try to find libattr
+# Once done this will define
+#  LibAttr_FOUND - System has libattr
+#  LibAttr_INCLUDE_DIRS - The libattr include directories
+#  LibAttr_LIBRARIES - The libraries needed to use libattr
+
+FIND_LIBRARY(LibAttr_LIBRARIES
+    NAMES attr
+)
+
+FIND_PATH(LibAttr_INCLUDE_DIRS
+    NAMES attr/libattr.h
+)
+
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(LibAttr DEFAULT_MSG
+    LibAttr_LIBRARIES
+    LibAttr_INCLUDE_DIRS
+)
+
+# Hide these vars from ccmake GUI
+MARK_AS_ADVANCED(
+	LibAttr_LIBRARIES
+	LibAttr_INCLUDE_DIRS
+)