CMake: doing proper string comparison in IF clause

diff --git a/SalomePYCALCULATORConfig.cmake.in b/SalomePYCALCULATORConfig.cmake.in
index 838ba9b2233894ae422dd862312f6da42de41e66..fe17b33f494ec7c70e05e289e0b0ea297ee92abc 100644 (file)
--- a/SalomePYCALCULATORConfig.cmake.in
+++ b/SalomePYCALCULATORConfig.cmake.in
@@ -67,7 +67,7 @@ MATH(EXPR _range "${_list_len}-1")
 FOREACH(_p RANGE ${_range})  
   LIST(GET _PREREQ            ${_p} _pkg    )
   LIST(GET _PREREQ_CONFIG_DIR ${_p} _pkg_dir)
-  IF(_pkg_dir)
+  IF(NOT _pkg_dir STREQUAL "")
      MESSAGE(STATUS "===> Reloading targets from ${_pkg} ...")
      FIND_PACKAGE(${_pkg} REQUIRED NO_MODULE 
           PATHS "${_pkg_dir}"