diff options
Diffstat (limited to 'Source/cmPolicies.cxx')
| -rw-r--r-- | Source/cmPolicies.cxx | 25 |
1 files changed, 15 insertions, 10 deletions
diff --git a/Source/cmPolicies.cxx b/Source/cmPolicies.cxx index 0d35b65..6b35b5b 100644 --- a/Source/cmPolicies.cxx +++ b/Source/cmPolicies.cxx @@ -358,19 +358,24 @@ cmPolicies::cmPolicies() this->DefinePolicy( CMP0012, "CMP0012", - "The if() command can recognize named boolean constants.", - "In CMake versions 2.6.4 and lower the only boolean constants were 0 " - "and 1. Other boolean constants such as true, false, yes, no, " + "if() recognizes numbers and boolean constants.", + "In CMake versions 2.6.4 and lower the if() command implicitly " + "dereferenced arguments corresponding to variables, even those named " + "like numbers or boolean constants, except for 0 and 1. " + "Numbers and boolean constants such as true, false, yes, no, " "on, off, y, n, notfound, ignore (all case insensitive) were recognized " "in some cases but not all. " "For example, the code \"if(TRUE)\" might have evaluated as false. " - "In later versions of cmake these values are " - "treated as boolean constants more consistently and should not be used " - "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.", + "Numbers such as 2 were recognized only in " + "boolean expressions like \"if(NOT 2)\" (leading to false) " + "but not as a single-argument like \"if(2)\" (also leading to false). " + "Later versions of CMake prefer to treat numbers and boolean constants " + "literally, so they should not be used as variable names." + "\n" + "The OLD behavior for this policy is to implicitly dereference variables " + "named like numbers and boolean constants. " + "The NEW behavior for this policy is to recognize numbers and " + "boolean constants without dereferencing variables with such names.", 2,8,0, cmPolicies::WARN); this->DefinePolicy( |