ENH: modified the if command to address bug 9123 some

1 files changed, 13 insertions, 0 deletions

diff --git a/Source/cmPolicies.cxx b/Source/cmPolicies.cxx
index 169814ac47..5fc0d74dee 100644
--- a/Source/cmPolicies.cxx
+++ b/Source/cmPolicies.cxx
@@ -355,6 +355,19 @@ cmPolicies::cmPolicies()
     "The NEW behavior for this policy is to allow the commands to do their "
     "default cmake_policy PUSH and POP.",
     2,6,3, cmPolicies::WARN);
+
+    this->DefinePolicy(
+    CMP0012, "CMP0012",
+    "In CMake versions prior to 2.6.5 the only boolean constants were 0 and 1. "
+    "Other boolean constants such as true, false, yes, no, "
+    "on, off, y, n, notfound, ignore were recognized in some cases but not all. "
+    "In later versions of cmake these values are treated as boolean constants "
+    "more consistently and should not be used as variable names. "
+    "Please do not use them as variable names.",
+    "The OLD behavior for this policy is to allow variables to have names such as "
+    "true and to dereference them. "
+    "The NEW behavior for this policy is to treat strings like true as a boolean constant.",
+    2,6,5, cmPolicies::WARN);
 }
 
 cmPolicies::~cmPolicies()