Use CMAKE_INSTALL_LIBDIR to set LIB_SUFFIX.

OpenEmbedded sets this variable for builds, so use it to figure out if
the build should install into the lib64 directories.

Signed-off-by: Philip Balister <[email protected]>

Author: balister

cmake/Modules/GrPlatform.cmake

@@ -51,4 +51,12 @@ endif()
 if(NOT DEFINED LIB_SUFFIX AND LIB64_CONVENTION AND CMAKE_SYSTEM_PROCESSOR MATCHES "64$")
     set(LIB_SUFFIX 64)
 endif()
+
+########################################################################
+# Detect /lib versus /lib64
+########################################################################
+if (CMAKE_INSTALL_LIBDIR MATCHES lib64)
+    set(LIB_SUFFIX 64)
+endif()
+
 set(LIB_SUFFIX ${LIB_SUFFIX} CACHE STRING "lib directory suffix")