CMake: doing proper string comparison in IF clause

diff --git a/SalomeBLSURFPLUGINConfig.cmake.in b/SalomeBLSURFPLUGINConfig.cmake.in
index 94f92feeb2eb9676e2cb22ac46c2ac8842d79d22..55f3f05edc92afef84f45fe59ca10784f1705ce3 100644 (file)
--- a/SalomeBLSURFPLUGINConfig.cmake.in
+++ b/SalomeBLSURFPLUGINConfig.cmake.in
@@ -69,7 +69,7 @@ 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}"