MantisBT - CMake
we observed a bug in the CMakeScripts created by the Xcode generator. It is related to subprojects that depend on another. The problem is a missing absolute path to CMakeFiles/cmake.check_cache in a makefile. As a result it is not possible to build a target from a subproject as the ZERO_CHECK target cannot find cmake.check_cache and always assumes that it needs to rerun cmake.
This bug only occurs in the makefiles created by the Xcode generator. The Unix Makefiles generator works fine.
I fixed the bug in the sources of cmake where the wrong Makefile is created and recompiled a binary which works for us. See the diff in the Additional Information below.
Cheers,
David
Bug details:
When cmake is called to create an Xcode project, it will create a CMakeFiles/cmake.check_cache in the root build-folder. It also creates for each subproject a CMakeScripts/ReRunCMake.make Makefile, e.g. core/CMakeScripts/ReRunCMake.make, which looks like:
# Generated by CMake, DO NOT EDIT
CMakeFiles/cmake.check_cache: \
/Users/weese/seqan2/core/demos/CMakeLists.txt\
/Users/weese/seqan2/core/demos/howto/CMakeLists.txt\
/Users/weese/seqan2/core/demos/howto/scores/CMakeLists.txt\
/Users/weese/seqan2/core/demos/tutorial/CMakeLists.txt\
...
The problem is that this makfile is not executed in the root build-folder, but in the subproject folder where there is no CMakeFiles/cmake.check_cache file. Appending an absolute path in front of "CMakeFiles/cmake.check_cache" fixes the problem, this is also done by the Unix Makefile generator.
svn co http://svn.seqan.de/seqan/trunk [^] seqan-trunk
mkdir seqan-trunk/xcode
cd seqan-trunk/xcode
cmake .. -G Xcode
open core/demos/seqan_core_demos.xcodeproj
Now select the "alignment" target and try to build. It will always rerun cmake and then interrupt. When opening the main project seqan.xcodeproj everything works fine.
diff --git a/Source/cmGlobalXCodeGenerator.cxx b/Source/cmGlobalXCodeGenerator.cxx
index e8ab38f..960eb2c 100644
--- a/Source/cmGlobalXCodeGenerator.cxx
+++ b/Source/cmGlobalXCodeGenerator.cxx
@@ -495,6 +495,7 @@ void cmGlobalXCodeGenerator::CreateReRunCMakeFile(
(this->CurrentReRunCMakeMakefile.c_str());
makefileStream.SetCopyIfDifferent(true);
makefileStream << "# Generated by CMake, DO NOT EDIT\n";
+ makefileStream << mf->GetHomeOutputDirectory() << '/';
makefileStream << cmake::GetCMakeFilesDirectoryPostSlash();
makefileStream << "cmake.check_cache: ";
for(std::vector<std::string>::const_iterator i = lfiles.begin();
0001-Xcode-Fix-ReRunCMake.make-path-to-cmake.check_cache-.patch (1,564) 2012-10-24 14:14https://public.kitware.com/Bug/file/4531/0001-Xcode-Fix-ReRunCMake.make-path-to-cmake.check_cache-.patch