CMake: doing proper string comparison in IF clause

diff --git a/SalomeGUIConfig.cmake.in b/SalomeGUIConfig.cmake.in
index ff024cda2b2a491d2839ee67a1923654dcc8cea5..65718af78afe996aa42a04f5d02cb4894bcbea66 100644 (file)
--- a/SalomeGUIConfig.cmake.in
+++ b/SalomeGUIConfig.cmake.in
@@ -88,7 +88,7 @@ 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}"