diff --git a/Modules/CMakeCCompilerId.c.in b/Modules/CMakeCCompilerId.c.in
index 7a0a39de1..a999e8db5 100644
--- a/Modules/CMakeCCompilerId.c.in
+++ b/Modules/CMakeCCompilerId.c.in
@@ -25,7 +25,13 @@
 # define COMPILER_ID "Compaq"
 
 #elif defined(__IBMC__)
-# define COMPILER_ID "VisualAge"
+# if defined(__COMPILER_VER__)
+#  define COMPILER_ID "zOS"
+# elif __IBMC__ >= 800
+#  define COMPILER_ID "XL"
+# else
+#  define COMPILER_ID "VisualAge"
+# endif
 
 #elif defined(__PGI)
 # define COMPILER_ID "PGI"
diff --git a/Modules/CMakeCXXCompilerId.cpp.in b/Modules/CMakeCXXCompilerId.cpp.in
index 77a6247c3..2c8aa3c3c 100644
--- a/Modules/CMakeCXXCompilerId.cpp.in
+++ b/Modules/CMakeCXXCompilerId.cpp.in
@@ -27,7 +27,13 @@
 # define COMPILER_ID "Compaq"
 
 #elif defined(__IBMCPP__)
-# define COMPILER_ID "VisualAge"
+# if defined(__COMPILER_VER__)
+#  define COMPILER_ID "zOS"
+# elif __IBMCPP__ >= 800
+#  define COMPILER_ID "XL"
+# else
+#  define COMPILER_ID "VisualAge"
+# endif
 
 #elif defined(__PGI)
 # define COMPILER_ID "PGI"
diff --git a/Modules/CMakeFortranCompilerId.F.in b/Modules/CMakeFortranCompilerId.F.in
index 63d3e438d..51f4e91d0 100644
--- a/Modules/CMakeFortranCompilerId.F.in
+++ b/Modules/CMakeFortranCompilerId.F.in
@@ -8,8 +8,14 @@
         PRINT *, 'INFO:compiler[SunPro]'
 #elif defined(__GNUC__)
         PRINT *, 'INFO:compiler[GNU]'
-#elif defined(__IBM__) || defined(__IBMC__)
+#elif defined(__IBMC__)
+# if defined(__COMPILER_VER__)
+        PRINT *, 'INFO:compiler[zOS]'
+# elif __IBMC__ >= 800
+        PRINT *, 'INFO:compiler[XL]'
+# else
         PRINT *, 'INFO:compiler[VisualAge]'
+# endif
 #elif defined(__PGI)
         PRINT *, 'INFO:compiler[PGI]'
 #elif defined(_SGI_COMPILER_VERSION) || defined(_COMPILER_VERSION)
diff --git a/Modules/Compiler/VisualAge-C.cmake b/Modules/Compiler/VisualAge-C.cmake
index 3120478e6..40b609e9a 100644
--- a/Modules/Compiler/VisualAge-C.cmake
+++ b/Modules/Compiler/VisualAge-C.cmake
@@ -1 +1 @@
-SET(CMAKE_C_VERBOSE_FLAG "-V")
+include(Compiler/XL-C)
diff --git a/Modules/Compiler/VisualAge-CXX.cmake b/Modules/Compiler/VisualAge-CXX.cmake
index 618ff5ade..2509b4396 100644
--- a/Modules/Compiler/VisualAge-CXX.cmake
+++ b/Modules/Compiler/VisualAge-CXX.cmake
@@ -1 +1 @@
-SET(CMAKE_CXX_VERBOSE_FLAG "-V")
+include(Compiler/XL-CXX)
diff --git a/Modules/Compiler/VisualAge-Fortran.cmake b/Modules/Compiler/VisualAge-Fortran.cmake
index 49d6bb2f3..3ef3178d9 100644
--- a/Modules/Compiler/VisualAge-Fortran.cmake
+++ b/Modules/Compiler/VisualAge-Fortran.cmake
@@ -1,2 +1 @@
-SET(CMAKE_Fortran_VERBOSE_FLAG "-V")
-SET(CMAKE_Fortran_DEFINE_FLAG "-WF,-D")
+include(Compiler/XL-Fortran)
diff --git a/Modules/Compiler/XL-C.cmake b/Modules/Compiler/XL-C.cmake
new file mode 100644
index 000000000..3120478e6
--- /dev/null
+++ b/Modules/Compiler/XL-C.cmake
@@ -0,0 +1 @@
+SET(CMAKE_C_VERBOSE_FLAG "-V")
diff --git a/Modules/Compiler/XL-CXX.cmake b/Modules/Compiler/XL-CXX.cmake
new file mode 100644
index 000000000..618ff5ade
--- /dev/null
+++ b/Modules/Compiler/XL-CXX.cmake
@@ -0,0 +1 @@
+SET(CMAKE_CXX_VERBOSE_FLAG "-V")
diff --git a/Modules/Compiler/XL-Fortran.cmake b/Modules/Compiler/XL-Fortran.cmake
new file mode 100644
index 000000000..49d6bb2f3
--- /dev/null
+++ b/Modules/Compiler/XL-Fortran.cmake
@@ -0,0 +1,2 @@
+SET(CMAKE_Fortran_VERBOSE_FLAG "-V")
+SET(CMAKE_Fortran_DEFINE_FLAG "-WF,-D")
diff --git a/Modules/Platform/Linux-VisualAge-C.cmake b/Modules/Platform/Linux-VisualAge-C.cmake
index 295226bbe..0622b63c3 100644
--- a/Modules/Platform/Linux-VisualAge-C.cmake
+++ b/Modules/Platform/Linux-VisualAge-C.cmake
@@ -1,2 +1 @@
-SET(CMAKE_SHARED_LIBRARY_C_FLAGS "")        
-SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")  
+include(Platform/Linux-XL-C)
diff --git a/Modules/Platform/Linux-VisualAge-Fortran.cmake b/Modules/Platform/Linux-VisualAge-Fortran.cmake
index 295226bbe..1939a8a2f 100644
--- a/Modules/Platform/Linux-VisualAge-Fortran.cmake
+++ b/Modules/Platform/Linux-VisualAge-Fortran.cmake
@@ -1,2 +1 @@
-SET(CMAKE_SHARED_LIBRARY_C_FLAGS "")        
-SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")  
+include(Platform/Linux-XL-Fortran)
diff --git a/Modules/Platform/Linux-XL-C.cmake b/Modules/Platform/Linux-XL-C.cmake
new file mode 100644
index 000000000..08370e246
--- /dev/null
+++ b/Modules/Platform/Linux-XL-C.cmake
@@ -0,0 +1,2 @@
+SET(CMAKE_SHARED_LIBRARY_C_FLAGS "")
+SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")
diff --git a/Modules/Platform/Linux-XL-Fortran.cmake b/Modules/Platform/Linux-XL-Fortran.cmake
new file mode 100644
index 000000000..08370e246
--- /dev/null
+++ b/Modules/Platform/Linux-XL-Fortran.cmake
@@ -0,0 +1,2 @@
+SET(CMAKE_SHARED_LIBRARY_C_FLAGS "")
+SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")