From 6dae6660fce095681c41fada1d29ab7c80eb8810 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 6 Dec 2011 12:07:35 -0500
Subject: Detect IBM XL compiler version with its id

Decode decimal digits from __IBMC__ and __IBMCPP__ to compute version
number components.  See documentation at:

  http://predef.sourceforge.net/precomp.html
  http://publib.boulder.ibm.com/infocenter/comphelp/v111v131/topic/com.ibm.xlc111.aix.doc/compiler_ref/xlmacros.html
  http://publib.boulder.ibm.com/infocenter/comphelp/v111v131/topic/com.ibm.xlcpp111.aix.doc/compiler_ref/xlmacros.html
---
 Modules/CMakeCCompilerId.c.in     | 11 ++++++++---
 Modules/CMakeCXXCompilerId.cpp.in | 11 ++++++++---
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/Modules/CMakeCCompilerId.c.in b/Modules/CMakeCCompilerId.c.in
index 5afe99f..e7738cf 100644
--- a/Modules/CMakeCCompilerId.c.in
+++ b/Modules/CMakeCCompilerId.c.in
@@ -38,10 +38,15 @@
 #elif defined(__IBMC__)
 # if defined(__COMPILER_VER__)
 #  define COMPILER_ID "zOS"
-# elif __IBMC__ >= 800
-#  define COMPILER_ID "XL"
 # else
-#  define COMPILER_ID "VisualAge"
+#  if __IBMC__ >= 800
+#   define COMPILER_ID "XL"
+#  else
+#   define COMPILER_ID "VisualAge"
+#  endif
+#  define COMPILER_VERSION_MAJOR DEC(__IBMC__/100)
+#  define COMPILER_VERSION_MINOR DEC(__IBMC__/10 % 10)
+#  define COMPILER_VERSION_PATCH DEC(__IBMC__    % 10)
 # endif
 
 #elif defined(__PGI)
diff --git a/Modules/CMakeCXXCompilerId.cpp.in b/Modules/CMakeCXXCompilerId.cpp.in
index 4c42f8a..52ed6b2 100644
--- a/Modules/CMakeCXXCompilerId.cpp.in
+++ b/Modules/CMakeCXXCompilerId.cpp.in
@@ -40,10 +40,15 @@
 #elif defined(__IBMCPP__)
 # if defined(__COMPILER_VER__)
 #  define COMPILER_ID "zOS"
-# elif __IBMCPP__ >= 800
-#  define COMPILER_ID "XL"
 # else
-#  define COMPILER_ID "VisualAge"
+#  if __IBMCPP__ >= 800
+#   define COMPILER_ID "XL"
+#  else
+#   define COMPILER_ID "VisualAge"
+#  endif
+#  define COMPILER_VERSION_MAJOR DEC(__IBMCPP__/100)
+#  define COMPILER_VERSION_MINOR DEC(__IBMCPP__/10 % 10)
+#  define COMPILER_VERSION_PATCH DEC(__IBMCPP__    % 10)
 # endif
 
 #elif defined(__PGI)
-- 
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