4 files changed, 6 insertions, 6 deletions
diff --git a/Tests/Complex/CMakeLists.txt b/Tests/Complex/CMakeLists.txt
index a4a33c3..80cc2e3 100644
--- a/Tests/Complex/CMakeLists.txt
+++ b/Tests/Complex/CMakeLists.txt
@@ -95,7 +95,7 @@ endif()
 
 if(CMAKE_SYSTEM MATCHES "OSF1-V")
   if(NOT CMAKE_COMPILER_IS_GNUCXX)
-     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -timplicit_local -no_implicit_include ")
+     string(APPEND CMAKE_CXX_FLAGS " -timplicit_local -no_implicit_include ")
   endif()
 endif()
 
@@ -436,7 +436,7 @@ set(CMAKE_CXX_EXTENSIONS TRUE)
 # template support also need a flag to use the newer C++ library.
 if (CMAKE_CXX_COMPILER_ID STREQUAL HP AND
     CMAKE_CXX98_STANDARD_COMPILE_OPTION STREQUAL "+hpxstd98")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -AA")
+  string(APPEND CMAKE_CXX_FLAGS " -AA")
 endif ()
 
 # Clang/C2 in C++98 mode cannot properly handle some of MSVC headers
diff --git a/Tests/Complex/Executable/CMakeLists.txt b/Tests/Complex/Executable/CMakeLists.txt
index c30dcbc..2a79629 100644
--- a/Tests/Complex/Executable/CMakeLists.txt
+++ b/Tests/Complex/Executable/CMakeLists.txt
@@ -1,8 +1,8 @@
 #
 # Create exe.
 #
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DTEST_CXX_FLAGS")
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DTEST_C_FLAGS")
+string(APPEND CMAKE_CXX_FLAGS " -DTEST_CXX_FLAGS")
+string(APPEND CMAKE_C_FLAGS " -DTEST_C_FLAGS")
 
 # Create an imported target for if(TARGET) test below.
 add_library(ExeImportedTarget UNKNOWN IMPORTED)
diff --git a/Tests/Complex/Library/CMakeLists.txt b/Tests/Complex/Library/CMakeLists.txt
index f00cbd6..dbf806e 100644
--- a/Tests/Complex/Library/CMakeLists.txt
+++ b/Tests/Complex/Library/CMakeLists.txt
@@ -43,7 +43,7 @@ endif()
 #
 set(SharedLibrarySources sharedFile)
 add_library(CMakeTestLibraryShared SHARED ${SharedLibrarySources})
-set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DTEST_C_FLAGS")
+string(APPEND CMAKE_C_FLAGS " -DTEST_C_FLAGS")
 add_library(CMakeTestCLibraryShared SHARED testConly.c)
 define_property(
   TARGET PROPERTY FOO
diff --git a/Tests/Complex/VarTests.cmake b/Tests/Complex/VarTests.cmake
index 70b803a..9d35949 100644
--- a/Tests/Complex/VarTests.cmake
+++ b/Tests/Complex/VarTests.cmake
@@ -180,5 +180,5 @@ endforeach()
 
 set(FOREACH_CONCAT "")
 foreach (INDEX a;b;c;d;e;f;g)
-  set(FOREACH_CONCAT "${FOREACH_CONCAT}${INDEX}")
+  string(APPEND FOREACH_CONCAT "${INDEX}")
 endforeach()