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Drop compatibility with CMake < 2.4

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Drop all behavior activated by setting CMAKE_BACKWARDS_COMPATIBILITY to
a value lower than 2.4, and generate an error when projects or the user
attempt to do so.  In the error suggest using a CMake 2.8.x release.

Teach cmake_minimum_required to warn about projects that do not require
at least CMake 2.4.  They are not supported by CMake >= 3.0.

Replace the documentation of CMAKE_BACKWARDS_COMPATIBILITY with a
reference to policy CMP0001.
This commit is contained in:
Brad King
2013-10-18 11:25:49 -04:00
parent c7c44fc7f4
commit 7d47c69365
35 changed files with 71 additions and 309 deletions
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17
Source/cmAddCustomTargetCommand.cxx
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@@ -25,17 +25,12 @@ bool cmAddCustomTargetCommand
// Check the target name.
if(args[0].find_first_of("/\\") != args[0].npos)
{
if(!this->Makefile->NeedBackwardsCompatibility(2,2))
{
cmOStringStream e;
e << "called with invalid target name \"" << args[0]
<< "\". Target names may not contain a slash. "
<< "Use ADD_CUSTOM_COMMAND to generate files. "
<< "Set CMAKE_BACKWARDS_COMPATIBILITY to 2.2 "
<< "or lower to skip this check.";
this->SetError(e.str().c_str());
return false;
}
cmOStringStream e;
e << "called with invalid target name \"" << args[0]
<< "\". Target names may not contain a slash. "
<< "Use ADD_CUSTOM_COMMAND to generate files.";
this->SetError(e.str().c_str());
return false;
}
// Accumulate one command line at a time.