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Features: Add dialect compile flags only if default is known. 

The CMAKE_<LANG>_STANDARD_DEFAULT variable indicates whether the
compiler has any notion of standard levels and that CMake knows
about them.  If no language standard levels are available, skip
all logic to attempt to add a flag for the level.

Also fail with an internal error if a bad default value is set.
This commit is contained in:
Stephen Kelly 2015-02-04 23:26:11 +01:00 committed by Brad King
parent 82c9d6868b
commit 72537e4436
1 changed files with 9 additions and 9 deletions
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18
Source/cmLocalGenerator.cxx
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@ -2209,7 +2209,7 @@ AddCompilerRequirementFlag(std::string &flags, cmTarget* target,
}
const char* defaultStd
= this->Makefile->GetDefinition("CMAKE_" + lang + "_STANDARD_DEFAULT");
if (defaultStd && !*defaultStd)
if (!defaultStd || !*defaultStd)
{
// This compiler has no notion of language standard levels.
return;
@ -2276,15 +2276,15 @@ AddCompilerRequirementFlag(std::string &flags, cmTarget* target,
std::find(stds.begin(), stds.end(), standard);
assert(stdIt != stds.end());
std::vector<std::string>::const_iterator defaultStdIt;
if (defaultStd)
std::vector<std::string>::const_iterator defaultStdIt =
std::find(stds.begin(), stds.end(), defaultStd);
if (defaultStdIt == stds.end())
{
defaultStdIt = std::find(stds.begin(), stds.end(), defaultStd);
assert(defaultStdIt != stds.end());
}
else
{
defaultStdIt = stds.end() - 1;
std::string e =
"CMAKE_" + lang + "_STANDARD_DEFAULT is set to invalid value '" +
std::string(defaultStd) + "'";
this->Makefile->IssueMessage(cmake::INTERNAL_ERROR, e);
return;
}
for ( ; stdIt <= defaultStdIt; ++stdIt)